Beijing, China
Beijing, China

Tsinghua University is a research university located in Beijing, People's Republic of China , and is one of the nine members in the C9 League. The institution was originally established in 1911 under the name "Tsinghua College" and had been renamed several times since then: from "Tsinghua School" which was used one year after its establishment, to "National Tsinghua University" which was adopted three years after the foundation of its university section in 1925. With its motto of Self-Discipline and Social Commitment, Tsinghua University describes itself as being dedicated to academic excellence, the well-being of Chinese society and to global development. It has consistently received top rankings in both domestic and international university rankings, alongside Peking University, which is the top elite higher learning institution in the mainland People's Republic of China .Tsinghua University in the People's Republic of China is a separate institution from the Taiwanese National Tsing Hua University located in Hsinchu city in the high-tech democratic industrialized developed country of the Republic of China . After the Chinese Civil War and the subsequent split of China into the two present-day separate sovereign independent countries of the Republic of China and the People's Republic of China , some academics and staff from the original Tsinghua University in the mainland People's Republic of China left and created the National Tsing Hua Institute of Nuclear Technology in 1955 in Hsinchu, Republic of China , which later became the National Tsing Hua University of island nation of Taiwan.The two Tsinghua universities are not affiliated with each other, but both claim to be successors of the original Tsinghua University. As a result of this dispute, the universities claimed to be the rightful recipient of the funds from the Boxer Rebellion indemnity that was used to start Tsinghua University. This indemnity was transferred to the university in Taiwan after the democratic Republic of China retreated to the island of Taiwan following the invasions and take over of mainland China by the communist People's Republic of China . Wikipedia.


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The disclosure discloses a kind of new NKT-like cell subpopulation, a therapeutical composition comprising the NKT-like cell subpopulation, and the medical use thereof. The disclosure also provides a preparation method of the NKT-like cell subpopulation. The disclosed NKT-like cell subpopulation has a strong antitumor effect, and can be adoptive transferred into a subject to treat the tumor in the subject after in vitro cultured and amplified.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2016-11-13

A method for growing carbon nanotubes is provided. A reactor including a reactor chamber and a substrate located in the reactor chamber is provide. The substrate is a hollow structure including a sidewall and a bottom. The hollow structure also defines an opening. The sidewall includes a carbon nanotube layer and catalyst particles dispersed in the carbon nanotube layer. A mixture of carbon source gas and carrier gas is introduced into the reactor chamber so that the mixture of carbon source gas and carrier gas flows into the hollow structure from the opening and out of the hollow structure through the sidewall. The hollow structure is heated.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2016-10-13

A method of growing carbon nanotubes is related. A reactor is provided. The reactor includes a reactor chamber and a carbon nanotube catalyst composite layer suspended in the reactor chamber. The carbon nanotube catalyst composite layer includes a carbon nanotube layer and a number of catalyst particles dispersed in the carbon nanotube layer. A mixture of carbon source gas and carrier gas is introduced into the reactor chamber to penetrate the carbon nanotube catalyst composite layer. The carbon nanotube catalyst composite layer is heated.


The invention relates to an application of silicon dioxide aerogel as a nano-drug carrying system in pharmacy. The silicon dioxide aerogel has a nanosized drug carrying hole structure, and is a nanosized pharmaceutical excipient capable of realizing a physical drug carrying scale below 100 nm.


Patent
Jiangsu Huadong Institute Of Li Ion Battery Co. and Tsinghua University | Date: 2016-11-22

A method for making a polyolefin composite separator is disclosed. Methyl methacrylate and -(triethoxysilyl)propyl methacrylate are polymerized to form a copolymer. The copolymer is dissolved in a first solvent to form a copolymer solution. The copolymer solution is applied to a surface of a polyolefin porous film, and dried to form a gel polymer electrolyte precursor layer on the surface of the polyolefin porous film. The polyolefin porous film having the gel polymer electrolyte precursor layer applied thereon is fumigated in an atmosphere of hydrochloric acid gas. A polyolefin composite separator and a lithium ion battery are also disclosed.


Patent
Jiangsu Huadong Institute Of Li Ion Battery Co. and Tsinghua University | Date: 2016-11-22

A method for making a polyolefin composite separator is disclosed. Methyl methacrylate and -(triethoxysilyl) propyl methacrylate are polymerized to form a copolymer. The copolymer and polyvinylidene fluoride are dissolved in a first solvent to form a first solution. A polyolefin porous film is immersed in a second solvent to soak the polyolefin porous film. The first solution is applied to a surface of the second solvent soaking polyolefin porous film. The polyolefin porous film having the first solution applied thereon is immersed in a third solvent to form holes, thereby forming a gel polymer electrolyte precursor layer on the surface of the polyolefin porous film. The polyolefin porous film having the gel polymer electrolyte precursor layer formed thereon is fumigated in an atmosphere of hydrochloric acid gas. A polyolefin composite separator and a lithium ion battery are also disclosed.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2016-09-07

The invention discloses a safety inspection detector and a goods safety inspection system. The safety inspection detector at least comprises a circuit board, a first housing, a second housing, a detection module and a connecting interface. The detection module and the connecting interface are mounted on the circuit board. The first housing is pressed and connected to a first surface of the circuit board, and the second housing is pressed and connected to a second surface of the circuit board. The first housing and the second housing can hermetically wrap the detection module and electronic devices on the circuit board, but bypass the connecting interface to realize leading-out and connection with related interconnected cables by utilizing the connecting interface. The housings can be used for sealing and protecting sensitive electronic devices in the detector, thus being moisture proof and preventing interference.


Patent
Tsinghua University and BEIJING U PRECISION Technology CO. | Date: 2015-04-17

A magnetically suspended coarse motion and fine motion integrated reticle stage driven by a planar motor comprises a movable platform (100), a balance mass (200), a drive motor, a mask plate (101), a base (001), a vibration isolation system (500), and a measuring system, wherein, the vibration isolation system is located between the balance mass and the base, and the mask plate is mounted on the movable platform. The drive motor of the movable platform is a moving-iron type planar motor (300). The reticle stage can lower the design complexity of the drive motor of the movable platform. Compared with a linear motor, the planar motor can provide push forces in more directions, the number of motors is reduced, the structure of the movable platform is more compact, the inherent frequency and the control bandwidth of the movable platform are improved, and thus control precision is improved.


Patent
Tsinghua University | Date: 2015-05-13

Provided are a method for multiple accesses in a memory, an apparatus supporting multiple accesses in the memory and a storage system. The method comprises: receiving a number N of addresses in the memory, wherein N is an integer larger than 1 and the number N of addresses are discontinuous (110); performing a preset operation according to the number N of addresses (120); and outputting the result of the operation (130). As a consequence, the performances of a computer system can be improved, and a user can input and use the desired addresses just as required by the user.


Patent
Tsinghua University | Date: 2014-02-20

A reconfigurable processor and a conditional execution method for the same are provided. The reconfigurable processor includes: a routing unit, configured to assign a conditional judgment statement and a conditional execution statement to process the conditional judgment statement and the conditional execution statement in parallel; a first arithmetic logic unit, configured to process the conditional judgment statement according to an assignment of the routing unit to obtain a single-bit signal; a second arithmetic logic unit, configured to: process the conditional execution statement according to the assignment of the routing unit to obtain a conditional execution result; receive the single-bit signal; and control an output of the conditional execution result according to the single-bit signal. The reconfigurable processor according to embodiments of the present disclosure may reduce a dependence distance and a running time of the conditional branch statement and enhance an execution efficiency of the conditional branch statement by executing the conditional judgment statement and the conditional execution statement in parallel.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2016-10-31

A method for making a oxide semiconductor film includes a step of forming an oxide film on a substrate by using a sputtering method and a sputtering target comprising In_(2)Ce_(x)ZnO_(4+2x), wherein x=0.52.


Provided is a method for generating configuration information of a dynamic reconfigurable processor. The dynamic reconfigurable processor includes a processing unit array, and the processing unit array includes a plurality of processing units. The method includes steps of: reading information of a task to be executed and generating an array configuration information top of the processing unit array according to the information; generating a plurality of processing unit configuration information corresponding to the plurality of processing units respectively according to the information; and assembling the array configuration information top and the plurality of processing unit configuration information.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2015-10-26

An oxide semiconductor film includes indium (In), cerium (Ce), zinc (Zn), doping metal element (M) and oxygen (O) elements, and a molar ratio of the In, Ce, and Zn as In:Ce:Zn is in a range of 2:(0.5 to 2):1. A method for making a oxide semiconductor film includes a step of forming an oxide film on a substrate by using a sputtering method and a sputtering target comprising In_(2)Ce_(x)ZnO_(4+2x), wherein x=0.52.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2015-10-26

An oxide semiconductor film includes indium (In), cerium (Ce), zinc (Zn) and oxygen (O) elements, and a molar ratio of the In, Ce, and Zn as In:Ce:Zn is in a range of 2:1:(0.5 to 2). A method for making a oxide semiconductor film includes a step of forming an oxide film on a substrate by using a sputtering method and a sputtering target comprising In_(2)CeZn_(x)O_(5+x), wherein x=0.52.


Patent
Tsinghua University | Date: 2015-12-03

The present disclosure provides a robust restoration method for an active distribution network, which can be used under uncertain environment. For uncertain factors in the power restoration, the robust restoration method creates polyhedral uncertainty sets of the load demands and the distribution generation outputs and presents a two-stage robust restoration optimization model to obtain switching decisions under the worst-case fluctuation scenarios, thereby maximizing the restored power, while satisfying constraints and uncertainty budget. The robust restoration method uses the column-and-constraint generation algorithm to solve the robust restoration optimization model. The robust restoration strategies generated by the model can make sure restoration feasibility under any fluctuation scenarios in the uncertainty sets. Implementation of the method is simple and the method has practicability and can solve unfeasibility of restoration strategies caused by uncertain factors in the active distribution network.


A method and an apparatus for generating a source-independent quantum random number are disclosed. The method includes: receiving by a receiver a photon signal sent by a source and converting by the receiver a multi-photon signal contained in the photon signal into a single-photon signal equivalent to the multi-photon signal; modulating a single-photon signal in an X basis or a Z basis, and performing a projection measurement on the X basis or the Z basis randomly; calculating an error rate of the source according to a measurement result of the Z basis; obtaining a partially random binary string according to a measurement result of the X basis; and obtaining and processing a minimal entropy of the partially random binary string so as to obtain a completely random binary string.


Patent
Tsinghua University | Date: 2016-11-07

A method for making an implantable lead is related. A pipe is provided. The pipe includes a first end portion, a second end portion opposite to the first end portion, and a middle portion connecting the first end portion and the second end portion. A flexible conductive layer is formed on the middle portion of the pipe. At least one contactor is applied on the first end portion of the pipe. At least one connector is applied on the second end portion of the pipe. At least one wire is placed in the pipe to electrically connect the at least one contactor and the at least one connector.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2016-11-01

A method for making a thin film transistor includes a step of forming a semiconducting layer, a source electrode, a drain electrode, a gate electrode, and an insulating layer on an insulating substrate. A process of forming the semiconducting layer comprises a step of sputtering an oxide semiconductor film on a substrate by using a sputtering target comprising In2CexZnO4+2x, wherein x=0.52.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2016-11-02

A method for making a sulfur-graphene composite material is provided. In the method, an elemental sulfur solution and a graphene dispersion are provided. The elemental sulfur solution includes a first solvent and an elemental sulfur dissolved in the first solvent. The graphene dispersion includes a second solvent and graphene sheets dispersed in the second solvent. The elemental sulfur solution is added to the graphene dispersion, a number of elemental sulfur particles are precipitated and attracted to a surface of the graphene sheets to form the sulfur-graphene composite material. The sulfur-graphene composite material is separated from the mixture.


The present disclosure provides a fast model generating and solving method for security-constrained power system operation simulation, which includes: obtaining information of all branches and nodes which are involved during operation simulation time period, calculating original-node impedance matrix, load shifting distribution factor original matrix and generator shifting distribution factor original matrix of all involved branches; correcting the load shifting distribution factor original matrix and the generator shifting distribution factor original matrix according to the on-off state of branches; obtaining output of each generator unit at each time period according to no-security-constraint unit commitment model, and determining overload of each branch again; solving iteratively until no branch is overloaded, and obtaining output of each generator unit at each time period under security constraint of operation simulation for the current simulation day, performing operating simulation for the rest simulation days to obtain security-constraint operation simulation result for the whole year.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2016-10-19

A touch panel is related. The touch panel includes a first electrode board, a second electrode board spaced from the first electrode board, a number of transparent spaces disposed between the first electrode board and the second electrode board, and an insulating frame disposed between the first electrode board and the second electrode board and around the plurality of transparent spaces. The first electrode board includes a first substrate, a first carbon nanotube structure located on and buried under a first surface of the first substrate, and two first electrodes electrically connected to the first carbon nanotube structure. A distance between the first carbon nanotube structure and the first surface of the first substrate is less than 10 micrometers.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-03-03

The present disclosure discloses an inspection device, an inspection method and an inspection system. The device comprises a distributed ray source comprising multiple source points; a light source collimator configured to converge the rays generated by the distributed ray source to form an inverted fan-shaped ray beam; a scatter collimator configured to only allow rays scattered at one or more particular scattering angles which are generated by the rays from the light source collimator interacting with inspected objects to pass; at least one detector each comprising multiple detection units which have an energy resolution capability and are substantially arranged in a cylindrical surface to receive the scattered rays passing through the scatter collimator; and a processing apparatus configured to calculate energy spectrum information of the scattered rays from the inspected objects based on a signal output by the detectors.


Patent
Jiangsu Huadong Institute Of Li Ion Battery Co. and Tsinghua University | Date: 2016-10-25

A method for making lithium manganese phosphate is disclosed. A divalent manganese source, a lithium source and a phosphate source are mixed and dissolved in a solvothermal reaction medium to form a mixed solution. The solvothermal reaction medium includes an organic solvent and a solubilizing agent. The mixed solution is then solvothermal reacted. A method for making lithium manganese phosphate/carbon composite material is also disclosed.


Patent
Jiangsu Huadong Institute Of Li Ion Battery Co. and Tsinghua University | Date: 2016-08-22

A method for making a cathode active material of a lithium ion battery is disclosed. In the method, LiMPO_(4 )particles and LiNPO_(4 )particles are provided. The LiMPO_(4 )particles and LiNPO_(4)particles both are olivine type crystals belonged to a pnma space group of an orthorhombic crystal system, wherein M represents Fe, Mn, Co, or Ni, N represents a metal element having a +2 valence, and N is different from M. The LiMPO_(4 )particles and the LiNPO_(4 )particles are mixed together to form a precursor. The precursor is calcined to form LiM_(x)N_(1-x)PO_(4 )particles, wherein 0


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2016-06-15

A Tera Hertz reflex klystron includes an electron emission unit, a resonant unit and an output unit. The electron emission is used to emit a plurality of electrons. The electron emission unit defines a first opening. The resonant unit comprises a resonant cavity frame. The resonant cavity frame comprises a top wall and a bottom wall and defines a resonant cavity. The top wall and the bottom wall faces with each other. The bottom wall comprises a bottom opening. The top wall comprises a top opening and at least one outputting hole. The bottom opening and the first opening are merged with each other. The output unit being configured to output Tera Hertz waves. The plurality of electrons are transferred to the output unit from the at least one outputting hole.


Patent
Tsinghua University and Hon Hai Precision Industry Co. | Date: 2016-11-28

A light emitting diode includes an insulating substrate, a first MgO layer, a semiconductor carbon nanotube layer, a second MgO layer, a functional dielectric layer, a first electrode, and a second electrode. The semiconductor carbon nanotube layer has a first surface and a second surface. The first MgO layer coats entire the first surface. The second surface is divided into a first region and a second region. The first region is coated with the second MgO layer. The second MgO layer is covered by the functional dielectric layer. The second region is exposed. The first electrode is electrically connected to the first region. The second electrode is electrically connected to the second region.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2017-02-08

Disclosed is a vehicle identification method and system. The method includes: acquiring appearance information of an inspected vehicle; obtaining external features of the vehicle based on the appearance information; acquiring a transmission image of the vehicle and obtaining internal features of the vehicle from the transmission image; forming descriptions on the vehicle at least based on the external features and the internal features; and determining a vehicle model of the vehicle from a vehicle model databased by utilizing the descriptions. This method merges various types of modality information, especially introducing the transmission image, and combines the internal structure information with the appearance information, so that the present disclosure can identify a vehicle model more practically.


Patent
China Nuclear Power Engineering Co., Tsinghua University and China General Nuclear Power Group | Date: 2017-01-04

The present invention provides a method for producing B4C/Al neutron-absorbing material sheet by continuous cast rolling including the steps of: 1) providing B4C particles and aluminum matrix melt, adding the B4C particles into the aluminum matrix melt while stirring the composite of the B4C particles and the aluminum matrix melt; 2) applying an electromagnetic field to the B4C particle-containing aluminum matrix melt passing through a headbox; 3) applying an ultrasonic vibration to the B4C particle-containing aluminum matrix melt passing through a casting nozzle; and 4) conducing twin roll continuous cast rolling on the B4C particle-containing aluminum matrix melt from the casting nozzle to obtain B4C/Al neutron-absorbing material sheet. The method of the present invention uses twin roll continuous cast rolling under coupled ultrasonic and electromagnetic oscillation to rapidly cool and refine the grains of the solidified composite material and realize uniform distribution of B4C particles in the aluminum matrix.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2017-01-11

The present disclosure discloses an inspection device, an inspection method and an inspection system. The device comprises a distributed ray source comprising multiple source points; a light source collimator arranged at a ray beam output end of the distributed ray source, and configured to converge the rays generated by the distributed ray source along fan-shaped radial lines to form an inverted fan-shaped ray beam; a scatter collimator configured to only allow rays scattered at one or more particular scattering angles which are generated by the rays from the light source collimator interacting with inspected objects to pass; at least one detector arranged on the downstream of the scatter collimator, each detector comprising multiple detection units which have an energy resolution capability and are substantially arranged in a cylindrical surface to receive the scattered rays passing through the scatter collimator; and a processing apparatus configured to calculate energy spectrum information of the scattered rays from the inspected objects based on a signal output by the detectors. The device described above measures an energy distribution of scattered X-rays at a fixed angle by using detectors having an energy resolution capability, to obtain a lattice constant of materials, so as to recognize categories of the materials.


Patent
Tsinghua University | Date: 2017-03-22

Provided are a method for multiple accesses in a memory, an apparatus supporting multiple accesses in the memory and a storage system. The method comprises: receiving a number N of addresses in the memory, wherein N is an integer larger than 1 and the number N of addresses are discontinuous (110); performing a preset operation according to the number N of addresses (120); and outputting the result of the operation (130). As a consequence, the performances of a computer system can be improved, and a user can input and use the desired addresses just as required by the user.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2017-02-15

Provided are an operation method and device relating to a security inspection three-dimensional CT image, the method comprising: providing a security inspection three-dimensional CT image; selecting an object image from the three-dimensional image; and providing a response based on the selection. The present invention can acquire related information of the object image from the security inspection CT image by the selection and response performed with respect to the security inspection CT image, is practical, and provides effective reference information for image determination in the field of security inspection CT.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2017-01-11

Disclosed is a vehicle inspection method. The method includes: acquiring a transmission image of an inspected vehicle; acquiring a transmission image template of a vehicle model the same as that of the inspected vehicle from a database; performing registration on the transmission image of the inspected vehicle and the transmission image template; determining a difference between a transmission image after the registration and a transmission image template after the registration, to obtain a change area of the transmission image of the vehicle relative to the transmission image template; and processing the change area to determine whether the vehicle carries a suspected object or not. This solution can avoid the problems of a detection loophole and a poor effect of manually determining an image in a conventional manner, and is important to assist the security inspection for small vehicles.


Patent
Huawei and Tsinghua University | Date: 2017-04-19

The present invention provides a method for obtaining a size of a transform block, where the method includes: obtaining a dividing manner of an image block; and obtaining size information of a post-dividing transform block according to the dividing manner of the image block and a width and a height of a pre-dividing transform block. By using the method for obtaining a size of a transform block provided in this embodiment of the present invention, a size of a transform block may be coded according to a dividing manner of an image block or a height and a width of a pre-dividing transform block, thereby effectively improving coding efficiency.


Provided is a modular construction of synthetic gene circuits in mammalian cells using TALE transcriptional repressors. Provided is a method for achieving regulated expression of two proteins: an expression cassette A comprises a feedback element coding sequence, a promoter A, a protein A and TALER protein A encoding gene linked by means of a self-cleaving polypeptide, and a target sequence A (comprising an shRNA1 target sequence); an expression cassette B comprises a feedback element coding sequence, a promoter B, a protein B and TALER protein B encoding gene linked by means of a self-cleaving polypeptide, and a target sequence B (comprising an shRNA2 target sequence); an expression cassette C comprises a constitutive promoter and an activating element-coding sequence; a recombinant vector A having the expression cassette A, a recombinant vector B having the expression cassette B, and a recombinant vector C having the expression cassette C are introduced into host cells to regulate the expression of protein A and protein B by adding shRNA1 or shRNA2.


Patent
Shanghai Micro Electronics Equipment Co. and Tsinghua University | Date: 2013-12-06

A negative stiffness system for gravity compensation of a micropositioner of wafer table in lithography machine, characterized in that, the negative stiffness system includes at least three sets of quasi-zero stiffness units, each of the sets of quasi-zero stiffness units comprises a pair of negative stiffness springs and a positive stiffness spring, the positive stiffness spring is vertically positioned, the pair of negative stiffness springs are obliquely and symmetrically positioned at two sides of the positive stiffness spring, upper ends 20 of the negative stiffness springs and the positive stiffness spring are connected together and fixed to the bottom surface of a rotor of the micropositioner, and lower ends of the negative stiffness springs and the positive stiffness spring are connected to a base, respectively. The system reduces the stiffness in vertical direction and prevents the influence of permanent magnet on its surroundings, while improving the bearing capacity.


Grant
Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: SPA.2013.3.2-01 | Award Amount: 2.63M | Year: 2013

PArtnership with chiNa on space DAta The objective of the PANDA Project is to establish a team of European and Chinese scientists who will jointly use space observations and in-situ data as well as advanced numerical models to monitor, analyse and forecast global and regional air quality. PANDA will provide to users and stakeholders knowledge, methodologies and toolboxes that will serve as a basis for global and regional air quality analysis and forecasts. It will provide science-based information that will improve air quality management by regional and local authorities. A strong dissemination and education activity will be established to train users to use the key products and data generated by the Project. Through the proposed cooperation between Europe and China, the following objectives will be reached before the completion of the Project: 1. Improvement of methods for monitoring air quality from combined space and in-situ observations 2. Elaboration of indicators for air quality, in support of European and Chinese policies 3. Development of toolboxes for air quality and emissions monitoring 4. Dissemination of information and educational activities The PANDA project is organized around 7 work-packages dealing with remote sensing data, in-situ observations, anthropogenic and natural emissions, integration of observations and models, toolbox development, cooperation, dissemination of knowledge and capacity building, and management and coordination. The project will support the European Space Policy and specifically the GMES Programme (Global Monitoring for Environment and Security). It will contribute to the development of the Global Earth Observation System of Systems (GEOSS).


Grant
Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: ENV.2011.1.1.2-2 | Award Amount: 3.81M | Year: 2011

ECLIPSE aims to develop and assess effective emission abatement strategies for short-lived climate agents in order to provide sound scientific advice on how to mitigate climate change while improving the quality of air. Current climate policy does not consider a range of short-lived gases and aerosols, and their precursors (including nitrogen oxides, volatile organic compounds, sulphate, and black carbon). These nevertheless make a significant contribution to climate change and directly influence air quality. There are fundamental scientific uncertainties in characterizing both the climate and air quality impacts of short-lived species and many aspects (for example, the regional dependence) are quite distinct to those for the longer-lived climate gases already included in the Kyoto Protocol. ECLIPSE will bring together 11 institutes with established and complementary expertise for a closely co-ordinated 3 year programme. It will build on existing knowledge and use state-of-the-art chemistry and climate models to (i) improve understanding of key atmospheric processes (including the impact of short-lived species on cloud properties) and characterize existing uncertainties; (ii) evaluate model simulations of short-lived species and their long-range transport using ground-based and satellite observations; (iii) perform case studies on key source and receptor regions (focused on Southeastern Europe, China and the Arctic); (iv) quantify the radiative forcing and climate response due to short-lived species, incorporating the dependence on where the species are emitted; (v) refine the calculation of climate metrics, and develop novel metrics which, for example, consider rate of climate warming and go beyond using global-mean quantities; (vi) clarify possible win-win and trade-off situations between climate policy and air quality policy; (vii) identify a set of concrete cost-effective abatement measures of short-lived species with large co-benefits.


Patent
Shanghai Micro Electronics Equipment Co. and Tsinghua University | Date: 2013-02-21

A method for measuring the displacement of a planar motor rotor. The measuring method comprises: four magnetic induction intensity sensors are distributed on the planar motor rotor; sampled signals of the four distributed sensors are processed to obtain signals B_(sx), B_(cx), B_(sy )and B_(cy )and magnetic field reference values B_(ksx), B_(kcx), B_(ksy )and B_(kcy); and X-direction displacement and Y-direction displacement can be measured respectively according to inequalities (I) and (II) by judgments, wherein _(x )and _(y )are X-direction displacement resolution and Y-direction displacement resolution respectively, and BM is the magnetic induction intensity amplitude of the magnetic field of said planar motor. The method provided by the invention is simple in calculation, can avoid calculation of a transcendental function and solve the quadrant judgment problem, is favorable to real-time high-speed operation and has a high engineering value.


Patent
China Nuclear Power Engineering Co., Tsinghua University and China General Nuclear Power Group | Date: 2016-07-27

The present invention provides a method for producing B4C/Al neutron-absorbing material sheet by continuous cast rolling including the steps of: 1) providing B4C particles and aluminum matrix melt, adding the B4C particles into the aluminum matrix melt while stirring the composite of the B4C particles and the aluminum matrix melt; 2) applying an electromagnetic field to the B4C particle-containing aluminum matrix melt passing through a headbox; 3) applying an ultrasonic vibration to the B4C particle-containing aluminum matrix melt passing through a casting nozzle; and 4) conducing twin roll continuous cast rolling on the B4C particle-containing aluminum matrix melt from the casting nozzle to obtain B4C/Al neutron-absorbing material sheet. The method of the present invention uses twin roll continuous cast rolling under coupled ultrasonic and electromagnetic oscillation to rapidly cool and refine the grains of the solidified composite material and realize uniform distribution of B4C particles in the aluminum matrix.


Patent
IHI Corporation and Tsinghua University | Date: 2012-12-19

A centrifugal compressor includes an asymmetric self-recirculating casing treatment that includes, on an inner face of a casing 10, a suction ring groove 1, a ring guide channel 2 and a back-flow ring groove 3 to form a self-recirculating channel. An axial-direction position S_(r) from an upstream end face of the suction ring groove to an impeller full blade leading edge 4 or a width b_(r) of the suction ring groove 1 is represented as A (D-D)^(2)+A_(0) and is distributed in a parabolic shape in a circumferential direction. An initial phase angle _(0) is in a range of 0_(0)2. A circumferential angle of the casing has a definition range of _(0)_(0)+2. In the expression, A denotes a parameter of the parabola in the axial-direction position S_(r) or the width b_(r), and A_(0) denotes an extreme of the axial-direction position S_(r) or the width b_(r) when corresponding circumferential angle and the are equal at an extreme point of distribution of the parabola.


Patent
IHI Corporation and Tsinghua University | Date: 2012-12-19

A centrifugal compressor has a casing 7. In the casing 7 is formed a back-flow channel 9 to return fluid from a downstream position of an impeller full blade leading edge 6a to an upstream position of the impeller full blade leading edge 6a. The back-flow channel 9 includes a suction ring groove 9a and a back-flow ring groove 9b. The suction ring groove opens at the downstream position on the inner face 7a of the casing 7, and extends in the circumferential direction. The back-flow ring groove opens at the upstream position on the inner face 7a, and extends in the circumferential direction. Distribution in the circumferential direction of the axial-direction position of the suction ring groove 9a or a width of the suction ring groove 9a is asymmetric with reference to the rotation axis.


Patent
CapitalBio eHealth Science & Technology Beijing Co., CapitalBio Corporation, Tsinghua University and Shanghai Sixth Peoples Hospital | Date: 2016-07-06

In one aspect, provided herein are set of primers and use of the same for the detection of SNPs associated with diabetes. In certain embodiments, the primers used to detect SNP sites associated with diabetes comprise Primer Set 1 to Primer Set 47. The experiments show: the genotyping results of the SNP sites associated with diabetes can be accurately detected by the primers disclosed herein, and the risk of individuals can be comprehensively evaluated and the result is more accurate than the single site analysis. In addition, SNPs disclosed herein are verified as associated with type 2 diabetes and its complications, which are especially suitable for the prevention and individualized treatment for type 2 diabetes in East Asian, for example, in China.


Patent
Shanghai Micro Electronics Equipment Co. and Tsinghua University | Date: 2013-02-08

A planar motor rotor displacement measuring device and its measuring method are provided. The motor is a moving-coil type planar motor. The device comprises probes, two sets of sine sensors, two sets of cosine sensors, a signal lead wire and a signal processing circuit. The method is arranging two sets of magnetic flux density sensors within a magnetic field pitch along two vertical movement directions in the rotor located in the sine magnetic field area. Sampled signals of the four sets of sensors are respectively processed with a frequency multiplication operation, four subdivision signals are obtained, the zero-crossing points of the four subdivision signals are detected, and then two sets of orthogonal pulse signals are generated. The pulse number of the orthogonal pulse signals is counted, and phase difference of the two sets of orthogonal pulse signals is respectively detected.


Patent
Shanghai Micro Electronics Equipment Co. and Tsinghua University | Date: 2013-12-06

A silicon wafer platform with anti-collision function comprises a silicon wafer platform body (1) and a cable platform (2). The cable platform (2) is mounted on one side of the silicon wafer platform. The silicon wafer platform comprises three airbags (3), four damping buffer elements (4) and an air source (6), the three airbags (3) being connected in series and respectively secured on the other three sides of the silicon wafer platform by an airbag support (5), two adjacent airbags (3) communicating with a gas pipeline by one damping buffer element (4), and the gas pipeline being secured on the cable platform (2) and communicating with the air source. When two silicon platforms collide, the collision is buffered by the airbags and the silicon wafer platforms are not bounced off.


Healthspan (the life period when one is generally healthy and free from serious disease) depends on nature (genetic make-up) and nurture (environmental influences, from the earliest stages of development throughout life). Genetic studies increasingly reveal mutations and polymorphisms that may affect healthspan. Similarly, claims abound about lifestyle modifications or treatments improving healthspan. In both cases, rigorous testing is hampered by the long lifespan of model organisms like mice (let alone humans) and the difficulty of introducing genetic changes to examine the phenotype of the altered genome. We will develop C. elegans as a healthspan model. Already validated extensively as an ageing model, this organism can be readily modified genetically, and effects of environmental manipulations on healthspan can be measured in days or weeks. Once validated as a healthspan model, it can be used for an initial assessment of preventive and therapeutic measures for humans, as well as for risk identification and the initial evaluation of potential biomarkers. It will also prove useful to study interactions between genetic and various environmental factors.


Grant
Agency: Cordis | Branch: FP7 | Program: CP-FP-SICA | Phase: HEALTH.2010.1.1-3 | Award Amount: 4.87M | Year: 2011

Protein glycosylation is a post-translational phenomenon that is involved in most physiological and disease processes including cancer. Most of the known cancer-associated glycobiomarkers were discovered individually using liquid chromatography and mass spectroscopy. Though valuable, there is room for improvement in these approaches for the discovery phase. There is also a critical need for innovative, rapid, and high-throughput (HTP) technologies that will translate the discovery of cancer-associated glycobiomarkers from basic science to clinical application. The GlycoHIT consortium brings a highly experienced, innovative and interdisciplinary team of researchers from Europe, China and USA representing academia, industry and clinical fields to significantly enhance some of the existing glycoanalytical technologies and to advance novel HTP glycoanalytical technologies beyond current state of the art. Microchip technology and novel partitioning methods will be exploited for nanoscale HTP separations of serum glycoproteins for analysis by HPLC or LCMS. In parallel, lectin array technology will be radically improved by the innovative use of recombinant human lectins and lectin mimics derived by screening large phage displayed combinatorial libraries. Aptamer libraries will be exploited for identification of lectin mimics and development of a glycosignature platform Compatibility of the lectin/lectin mimic array technologies with novel label-free biosensors will be explored. Newly-developed technologies will be validated by analysis of serum samples from a variety of cancer patient cohorts and will be supported throughout by experimental interaction analysis, complex structural modelling and informatics. Effective project management, commercially-aware intellectual property management and targeted dissemination activities supplement the core science and ensure maximum impact for the project.


Grant
Agency: Cordis | Branch: FP7 | Program: CP | Phase: ICT-2011.4.2 | Award Amount: 4.75M | Year: 2012

The goal of the X-LIKE project is to develop technology to monitor and aggregate knowledge that is currently spread across global mainstream and social media, and to enable cross-lingual services for publishers, media monitoring and business intelligence.In terms of research contributions, the aim is to combine scientific insights from several scientific areas to contribute in the area of cross-lingual text understanding. By combining modern computational linguistics, machine learning, text mining and semantic technologies we plan to deal with the following two key open research problems:- to extract and integrate formal knowledge from multilingual texts with cross-lingual knowledge bases, and- to adapt linguistic techniques and crowdsourcing to deal with irregularities in informal language used primarily in social media.As an interlingua, knowledge resources from Linked Open Data cloud (http://linkeddata.org/) will be used with special focus on general common sense knowledge base CycKB (http://www.cyc.com/). For the languages where no required linguistic resources will be available, we will use a probabilistic interlingua representation trained from a comparable corpus drawn from the Wikipedia.The solution will be applied on two case studies, both from the area of news. For the Bloomberg case study the domain will be financial news, while for the Slovenian Press Agency we will deal with general news. The technology developed in the project will be used to introduce cross-lingual and information from social media in services for publishers and end-users in the area of summarization, contextualization, personalization, and plagiarism detection. Special attention will be paid to analysing news reporting bias from multilingual sources. The developed technology will be language-agnostic, while within the project we will specifically address English, German, Spanish, and Chinese as major world languages and Catalan and Slovenian as minority languages.


Grant
Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: SPA.2013.3.2-01 | Award Amount: 2.90M | Year: 2013

Due to the strong economic growth in the China in the past decade, air pollution has become a serious issue in many parts of the country. Therefore, up-to-date regional air pollution information and means of emission control for the main pollutants are important for China. Especially, the Beijing-Tianjin-Hebei region, the Yangtze River and the Pearl River deltas are known as three focal regions with serious air pollution where air quality policies are very important. Within the FP6 project AMFIC atmospheric environmental monitoring over China was addressed by a team of both Chinese and European scientists. Within AMFIC it was concluded that modelling of air quality and therefore the forecast capabilities are hampered by the rapidly changing emissions due to economic growth. In addition, air quality measures could not directly be related to changes in emissions. Therefore, within the follow-up proposal - MarcoPolo - the focus will be on emission estimates from space and the refinement of these emission estimates by spatial downscaling and by source sector apportionment. Air pollutants cover both anthropogenic and biogenic sources. A wide range of satellite data will be used from various instruments. From these satellite data, emission estimates will be made for NOx, SO2, PM and biogenic sources. With various state-of-the-art techniques emission inventories will be created and intercompared. By combining these emission data with known information from the ground a new emission database for MarcoPolo will be constructed. Due to the strongly growing economy in China regular emission inventories are quickly outdated. Within MarcoPolo we will have a monthly update of the emissions based on the latest satellite observations. The improved emission inventory is input to regional air quality models on meso-scale and urban-scale. End-users and decision makers will be informed about air quality via visualized model results and forecasts.


Lim W.A.,University of California at San Francisco | Lim W.A.,Howard Hughes Medical Institute | Lee C.M.,University of California at San Francisco | Tang C.,Tsinghua University
Molecular Cell | Year: 2013

A challenge in biology is to understand how complex molecular networks in the cell execute sophisticated regulatory functions. Here we explore the idea that there are common and general principles that link network structures to biological functions, principles that constrain the design solutions that evolution can converge upon for accomplishing a given cellular task. We describe approaches for classifying networks based on abstract architectures and functions, rather than on the specific molecular components of the networks. For any common regulatory task, can we define the space of all possible molecular solutions? Such inverse approaches might ultimately allow the assembly of a design table of core molecular algorithms that could serve as a guide for building synthetic networks and modulating disease networks. © 2013 Elsevier Inc.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-11-13

The present disclosure provides a method for rendering of CT image data. The method includes acquiring 2D image data of a background and 2D image data of a target; rendering the 2D image data of the target into a 3D image of the target to obtain a first hit position of a ray; rendering the 2D image data of the background into a 3D image of the background; adjusting the 3D image of the background based on the first hit position; and synthetically rendering the 3D image of the background and the 3D image of the target. The present disclosure also provides apparatus for implementing the method.


Grant
Agency: Cordis | Branch: H2020 | Program: RIA | Phase: SC5-03b-2014 | Award Amount: 5.21M | Year: 2015

An important question for policy makers, in the G20 and beyond, is how to bring climate action into the broader sustainable development agenda. Objectives like energy poverty eradication, increased well-being and welfare, air quality improvement, energy security enhancement, and food and water availability will continue to remain important over the next several decades. There have been relatively few scientific analyses, however, that have explored the complex interplay between climate action and development while simultaneously taking both global and national perspectives. The CD-LINKS project will change this, filling this critical knowledge gap and providing much-needed information for designing complementary climate-development policies. CD-LINKS has four overarching goals: (i) to gain an improved understanding of the linkages between climate change policies (mitigation/adaptation) and multiple sustainable development objectives, (ii) to broaden the evidence base in the area of policy effectiveness by exploring past and current policy experiences, (iii) to develop the next generation of globally consistent, national low-carbon development pathways, and (iv) to establish a research network and capacity building platform in order to leverage knowledge-exchange among institutions from Europe and other key players within the G20. Through six highly integrated work packages from empirical research to model and scenario development CD-LINKS will advance the state-of-the-art of climate-development policy analysis and modelling in a number of areas. The project aims to have a pronounced impact on the policy dialogue, both nationally and internationally: an important outcome of the project will be a list of country-specific policy recommendations for effectively managing the long-term transformation process. These recommendations will point out opportunities for policy synergies and at the same time respect political and institutional barriers to implementation.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-07-02

Provided are apparatus and method for generating distributed x-rays. A hot cathode of an electron gun (1) is used in vacuum to generate electron beams (10) having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device (4) is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard the anode target (5), and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-07-22

The disclosure provides a system and a method for customs in-transit supervision. The system comprises: a port clearance subsystem configured to collect and process information of a supervised object at a port; a risk management subsystem configured to determine an in-transit supervision scheme for the supervised object based on a risk level of the supervised object; an in-transit supervision apparatus configured to supervise the supervised object in transit according to the in-transit supervision scheme; and a central supervision subsystem configured to conduct information interaction with the port clearance subsystem, the risk management system and the in-transit supervision apparatus and transmit instructions for controlling the subsystems and the apparatus. By introducing comparison between origin port information and destination port information and a risk management mechanism, the system and the method according to the disclosure improves the specificity, efficiency and intensity of supervision.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-06-17

The present disclosure provides a system and method for inspecting an aircraft. A ray source and a detector locate at above and below of a fuselage of an aircraft, respectively. The ray source emits a beam of rays, which pass through the aircraft to be detected. The detector receives and converts the beam of rays that pass through the aircraft to an output signal, and generates a vertical transmission image in real time.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-02-24

The present invention discloses a vehicle inspection system, comprising: an inspection passage (101); a vehicle dragging system (100) arranged in the inspection passage (101), wherein the vehicle dragging system (100) comprises a first dragging means (111) and a second dragging means (112), which are sequentially arranged along a vehicle dragging direction (E), and in the vehicle dragging direction, the first dragging means (111) is arranged at the upstream of the second dragging means (112), and a separating section (113) is arranged between the first dragging means (111) and the second dragging means (112), so that the first dragging means (111) and the second dragging means (112) are separated by a preset distance in the vehicle dragging direction (E); and a radiographic inspection system (151), wherein at least a part of paths of the beams of the radiographic inspection system (151) passes through the separating section (113) between the first dragging means (111) and the second dragging means (112).


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2016-06-29

This invention relates to an apparatus producing distributed X-ray, and in particular to a cathode control multi-cathode distributed X-ray apparatus, which produces X-ray that changes focal position in a predetermined order by arranging multiple independent hot cathodes and controlling cathodes in an X-ray source device, and a CT device having said X-ray apparatus.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-07-21

The present invention provides a human body security inspection method and system. The method comprises: retrieving in real-time scanning row or column image data of a personal to be inspected; transmitting in real-time the image data to an algorithm processing module and processing these image data by the module; automatically recognizing a suspicious matter by a suspicious matter automatic target recognition technique, after retrieving an image data of an entire scanning image of the personal; any of the following three inspection modes is selected, so as to perform a further processing on basis of the recognition result of the suspicious matter, (1) in a manner of automatic target recognition technique, (2) in a combination manner of the automatic target recognition technique and a privacy protection image; and (3) a combination manner of the automatic target recognition technique, a privacy protection image and human intervention.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-07-22

The present disclosure relates to a self-prior information based X-ray dual-energy CT reconstruction method, which can utilize information inherent in data to provide a prior model, thereby obtaining a reconstructed image with a high quality. The X-ray dual-energy CT reconstruction method according to the present disclosure comprises: (a) rating an energy spectrum and establishing a dual-energy lookup table; (b) collecting high-energy data p_(H )and low-energy data p_(L )of a dual-energy CT imaging system using a detector of the dual-energy CT imaging system; (c) obtaining projection images R_(1 )and R_(2 )of scaled images r_(1 )and r_(2 )according to the obtained high-energy data p_(H )and low-energy data p_(L); (d) reconstructing the scaled image r_(2 )using a first piece-wise smooth constraint condition and thereby obtaining an electron density image; and (e) reconstructing the scaled image r_(1 )using a second piece-wise smooth constraint condition and thereby obtaining an equivalent atomic number image. In the present disclosure, the noise in the dual-energy reconstructed image can be effectively prohibited while keeping the resolution by effectively using information inherent in data.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-11-04

This invention provides a goods inspection apparatus using distributed X-ray source, comprising: a frame; a goods passage; a goods conveyor; a distributed X-ray source for producing X-ray at different positions successively within each working cycle; a detector array for receiving the X-ray from the distributed X-ray source and outputting signals indicating the strength of the X-ray; an electronics system for receiving signals from the detectors, converting the signals into digital ones, and forming a data packet with the position numbers of corresponding detectors, outputting a sequence of data packets formed by the position numbers and signals from the plurality of detectors of the detector array; an image processing system for receiving the output from the electronics system, processing the position numbers of detectors and the corresponding signals indicating the strength of X-ray, constructing to form an image of the object under inspection; a ray source power supply for providing power to the distributed X-ray source; and a control system for exercising logical control over the respective parts to enable the respective sub-systems to work in coordination.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-07-01

The X-ray fluoroscopic imaging system of the present invention comprises: an inspection passage; an electron accelerator; a shielding collimator apparatus comprising a shielding structure, and a first collimator for extracting a low energy planar sector X-ray beam and a second collimator for extracting a high energy planar sector X-ray beam which are disposed within the shielding structure; a low energy detector array for receiving the X-ray beam from the first collimator; and a high energy detector array for receiving the X-ray beam from the second collimator. The first collimator, the low energy detector array and the target point bombarded by the electron beam are located in a first plane; and the second collimator, the high energy detector array and the target point bombarded by the electron beam are located in a second plane.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-11-04

CT devices and methods thereof are disclosed. The CT device comprises a circular electron gun array including a plurality of electron guns, each of the electron guns is configured to emit electron beams along the radial direction of the circular electron gun array in sequence according to a predetermine pulse sequence; an acceleration cavity disposed inside of a circle on which the circular electron gun array is positioned, including a plurality of nested concentric coaxial cavities that operate in mode for accelerating electron beams emitted from the respective electron guns of the circular electron gun array; a circular transmission target disposed inside of a circle on which the acceleration cavity is positioned and being bombarded by the accelerated electron beams to generate X-rays; and a circular detector configured to receive the X-rays after they have passed through an object to be detected.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-12-30

The present invention provides a CT image calibration method and device and a CT system. The method includes: arranging a fixed calibration element at the outside of a channel area and within the maximal reconstruction area of a CT scanning device, and storing the theoretical value of the fixed calibration element; collecting the projection data of the fixed calibration element to obtain the actual reconstructed image of the fixed calibration element; and comparing the actual reconstructed image with the stored corresponding theoretical value, to establish a mapping function for correcting the actual reconstructed image into the theoretical value. By adopting the present invention, the calibration quality can be effectively improved, the image calibration effect is enhanced, the reliability of the CT scanning device is improved and the maintenance cost is saved, thus the practical application value is very high.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-11-04

CT devices and methods thereof are disclosed. The CT device comprises a circular electron beam emission array including a plurality of electron beam emission units that are distributed uniformly along a circle, wherein each electron beam emission unit emits electron beams that are substantially parallel to an axis of the circular electron beam emission array in sequence under the control of a control signal; a circular reflection target which is disposed to be coaxial with the circular electron beam emission array, wherein the electron beams bombard the circular reflection target to generate X-rays that intersect the axis of the circular electron beam emission array; and a circular detector array which is disposed to be coaxial with the circular reflection target and configured to include a plurality of detection units which receive the X-rays after they have passed through an object to be detected.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-07-06

The present disclosure provides a vehicle-carried quick inspection system (11). The vehicle-carried quick inspection system may comprise an X-ray source (12) and a detector (13), the X-ray source and the detector being arranged to form an inspection passage. The vehicle-carried quick inspection system further comprises a controller (18) configured to control the X-ray source so that X-ray irradiation dose is extremely low when the drivers cab of the inspected vehicle passes through an X-ray beam, and control the X-ray source so that the irradiation dose of the X-ray source becomes a working dose when the other subsequent portions of the inspected vehicle pass through the X-ray beam. With the vehicle-carried quick inspection system of the present disclosure, a mobile and fully automated security inspection system is obtained and quick inspection can be achieved, while protecting the driver from being damaged from X-ray irradiation. Compared to fixed inspection systems or mobile inspection systems in prior arts, the vehicle-carried quick inspection system of the present disclosure can provide more convenient and quicker inspection.


The disclosure provides a multi-power multi-dosage accelerator. The multi-power multi-dosage accelerator comprises an electron gun configured to provide a first voltage of the electron gun and a second voltage of the electron gun, and an accelerating tube configured to generate a first X-ray having a first dosage and first power according to the first voltage of the electron gun and generate a second X-ray having a second dosage and second power according to the second voltage of the electron gun, wherein the first dosage is a dosage which can be accepted by human bodies and is much less than the second dosage, the first X-ray is used for inspecting a first area where a person is located, and the second X-ray is used for inspecting a second area where goods are located.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-07-01

The present invention discloses a backscattering scintillation detector. The scintillation detector comprises a scintillation crystal detector; a X-ray sensitizing screen, which is disposed forward the scintillation crystal detector and where a backscattered X-ray from an object to be detected is processed and then at least part of the processed X-ray is incident to the scintillation crystal detector; and a photoelectric multiplier, which is disposed backward the scintillation crystal detector and is configured to collect a light signal from the scintillation crystal detector and convert it to an electrical signal. Through the above preferable embodiment, a X-ray sensitizing screen, a scintillation crystal detector, and light guiding and wave-drifting technologies are combined together to obtain a novel scintillation detector, which can improve detection of X-ray, transmission of light signal and conversion of light signal to electrical signal, thereby simplifying structure of the apparatus and reducing cost, while greatly increasing detection efficiency and measurement accuracy of the apparatus.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-05-20

The present disclosure provides a method for rendering of CT image data. The method includes acquiring 2D image data of a background and 2D image data of a target; rendering the 2D image data of the target into a 3D image of the target to obtain a first hit position of a ray; rendering the 2D image data of the background into a 3D image of the background; adjusting the 3D image of the background based on the first hit position; and synthetically rendering the 3D image of the background and the 3D image of the target. The present disclosure also provides apparatus for implementing the method.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-11-21

CT devices and methods thereof are disclosed. The CT device comprises a circular electron beam emission array including a plurality of electron beam emission units that are distributed uniformly along a circle, wherein each electron beam emission unit emits electron beams that are substantially parallel to an axis of the circular electron beam emission array in sequence under the control of a control signal; a circular reflection target which is disposed to be coaxial with the circular electron beam emission array, wherein the electron beams bombard the circular reflection target to generate X-rays that intersect the axis of the circular electron beam emission array; and a circular detector array which is disposed to be coaxial with the circular reflection target and configured to include a plurality of detection units which receive the X-rays after they have passed through an object to be detected.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-10-31

CT devices and methods thereof are disclosed. The CT device comprises a circular electron gun array including a plurality of electron guns, each of the electron guns is configured to emit electron beams along the radial direction of the circular electron gun array in sequence according to a predetermine pulse sequence; an acceleration cavity disposed inside of a circle on which the circular electron gun array is positioned, including a plurality of nested concentric coaxial cavities that operate in mode for accelerating electron beams emitted from the respective electron guns of the circular electron gun array; a circular transmission target disposed inside of a circle on which the acceleration cavity is positioned and being bombarded by the accelerated electron beams to generate X-rays; and a circular detector configured to receive the X-rays after they have passed through an object to be detected.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-12-20

The present invention discloses a human body security inspection apparatus and a corresponding method. Specifically, the apparatus comprises: a human body security inspection device (1), configured to scan the human to be inspected (2) in order to inspect whether the human to be inspected (2) carries prohibited articles; a KINECT sensor (3), configured to real-timely acquire information about the human to be inspected (2) so that the human body security inspection device (1) is capable of real-timely acquiring the information of the human to be inspected (2) by means of the KINECT sensor (3), so as to determine whether the information conforms to requirements of the human body security inspection device (1); and a data processing device (4), configured to communicate with the human body security inspection device (1) and the KINECT sensor (3), in order to real-timely analyse and process the information of the human to be inspected (2).


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2016-07-06

The present invention discloses an X-ray beam intensity monitoring device and an X-ray inspection system. The X-ray beam intensity monitoring device comprises an intensity detecting module (5) and a data processing module, wherein the intensity detecting module is adopted to be irradiated by the X-ray beam and send a detecting signal, the data processing module is coupled with the intensity detecting module to receive the detecting signal and output an X-ray beam intensity monitoring signal, wherein the X-ray beam intensity monitoring signal includes a dose monitoring signal of the X-ray beam and a brightness correction signal of the X-ray beam. The X-ray beam intensity monitoring device can simultaneously perform dose monitoring and brightness monitoring, thereby improving the service efficiency of the X-ray beam intensity monitoring device. Moreover, the monitoring result of the X-ray beam intensity can be more accurate and reliable.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-12-19

This invention relates to an apparatus producing distributed X-ray, and in particular to a cathode control multi-cathode distributed X-ray apparatus, which produces X-ray that changes focal position in a predetermined order by arranging multiple independent hot cathodes and controlling cathodes in an X-ray source device, and a CT device having said X-ray apparatus.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-12-19

The present invention relates to a Computed Tomography (CT) imaging system, in particular to a multi-energy CT imaging system and imaging method.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-12-23

Disclosed are methods and apparatuses for creating a 3-Dimensional model for objects in an inspected luggage in a CT system. The method includes acquiring slice data of the luggage with the CT system; interpolating the slice data to generate 3D volume data of the luggage; performing unsupervised segmentation on the 3D volume data of the luggage to obtain a plurality of segmental regions; performing isosurface extraction on the plurality of segmental regions to obtain corresponding isosurfaces; and performing 3D surface segmentation on the isosurfaces to form a 3D model for the objects in the luggage. The above solutions can create a 3D model for objects in the inspected luggage in a relatively accurate manner, and thus provide better basis for subsequent shape feature extraction and security inspection, and reduce omission factor.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-12-24

A CT apparatus without a gantry. The CT apparatus includes a scanning passage; a stationary X-ray source arranged around the scanning passage and including a plurality of ray emission focal spots; and a plurality of stationary detector modules arranged around the scanning passage and disposed opposite the X-ray source. At least some of the plurality of detector modules may be arranged substantially in an L shape, a semicircular shape, a U shape, an arc shape, a parabolic shape, or a curve shape when viewed in a plane intersecting the scanning passage. The invention ensures that the stationary gantry type CT system has a small size, and a high data identification accuracy.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-12-19

This invention relates to an X-ray goods inspection apparatus, and in particular to a goods inspection apparatus using distributed X-ray source.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-12-20

An inspection system included a ray source to emit a ray, a detector to receive the ray, a detection region for placing an object under inspection, and a moving device to move the ray source and the detector around the detection region. Conventional scanning blind zones such as both sides of a human body, both sides of arms and both sides of legs can be completely eliminated. In addition, it is not necessary for a human body under inspection to carry out an action such as turning around to change his or her posture. Therefore, ineffective time can be minimized in the entire detection and a passing rate of persons under inspection can be improved. Furthermore, an inspected persons mental feeling of being controlled due to change of posture can be greatly improved, and his or her mental discomfort and conflicted moods can be reduced.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-12-20

A human body back-scattering inspection system is disclosed. The system comprises a flying-spot forming unit configured to output beams of X-rays, a plurality of discrete detectors which are arranged vertically along a human body to be inspected, and a controlling unit coupled to the flying-spot forming unit and the plurality of detectors, and configured to generate a control signal to control the flying-spot forming unit and the plurality of detectors to perform a partition synchronous scan on the human body to be inspected vertically. The present disclosure utilizes the geometry property of the human body back-scattering inspection system, and proposes a multiple-point synchronous scan mechanism which largely accelerates the inspection of human body.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-12-23

Human body back-scattering inspection systems and methods are disclosed. In the invention, X-rays modulated by the flying-spot forming unit having spirally distributed flying-spots have a distribution having alternating peaks and valleys on the irradiated surface. In this way, scanning starting times can be precisely controlled to cause two devices to have scanning starting times that are different by a half of a cycle. That is, the beams outputted from one device are at maximum when the beams outputted from the other device are at minimum. In other words, even if the ray source of one device emits rays, it will not significantly affect imaging result of the other device. In such way, the two devices may emit rays and perform scanning at the same time, and thus the total scanning time is reduced.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-12-20

A human body security inspection system including a plurality of ray emitting-detecting modules, which are configured to emit X-rays to the object to be inspected and to receive X-rays scattered from the object to be inspected, wherein the ray emitting-detecting modules form an enclosed region with respect to the object to be inspected and security inspection is implemented on the object in the enclosed region.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-12-20

A standing wave electron linear accelerating apparatus and a method thereof are disclosed. The apparatus comprises an electron gun configured to generate electron beams; a pulse power source configured to provide a primary pulse power signal; a power divider coupled downstream from the pulse power source and configured to divide the primary pulse power signal outputted from the pulse power source into a first pulse power signal and a second pulse power signal; a first accelerating tube configured to accelerating the electron beams with the first pulse power signal; a second accelerating tube configured to accelerate the electron beams with the second pulse power signal; a phase shifter configured to continuously adjust a phase difference between the first pulse power signal and the second pulse power signal so as to generate accelerated electron beams with continuously adjustable energy at output of the second accelerating tube.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2013-12-20

An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-12-20

A three-dimensional data processing and recognizing method including scanning and re-constructing an object to be detected so as to obtain three-dimensional data for recognition of the object to be detected; and extracting data matching to features from the three-dimensional data, so that the extracted data constitutes an interested target in order to display and recognize the object to be detected. A quick method to recognize an object to be detected, such as the shapes of cuboid, cylinder, and cutting tool, and so on.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-12-20

A three-dimensional data processing and recognizing method including scanning and re-constructing objects to be detected so as to obtain three-dimensional data for recognition of the objects to be detected; extracting data matching to features from the three-dimensional data, so that the extracted data constitutes an interested target; with respect to the data matching to features, merging and classifying adjacent data points as one group, to form an image of the merged interested target; recognizing a cross section of the interested target; cutting the interested targets by a perpendicular plane which passes through a central point of the cross section and is perpendicular to it, in order to obtain a graph; and recognizing shape of the interested targets based on a property of the graph.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2013-12-20

Methods for extracting a shape feature of an object and security inspection methods and apparatuses. Use is made of CTs capability of obtaining a 3D structure. The shape of an object in an inspected luggage is used as a feature of a suspicious object in combination with a material property of the object. For example, a false alarm rate in detection of suspicious explosives may be reduced.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-07-23

The present invention provides a privacy protection method and a human body security inspection system having the same function. The privacy protection method comprises the steps of: acquiring in real-time scanning row or column image data of a personal to be inspected; displaying a physical profile image and an outline image of the personal to be inspected, on basis of the processed image of the scanning row or column image data; transmitting the physical profile image to an equipment end display in a human body security inspection system and displaying it thereon, and displaying the outline image of the personal to be inspected on a remote operation end display of the human body security inspection system; performing the suspicious matter recognition based on the outline image; and correspondingly displaying a suspected frame on the physical profile image, based on the suspicious matter recognized in the outline image.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2016-06-08

The present disclosure provides a human body security inspection apparatus, comprising: a base on which an inspected human stands; a millimeter-wave transceiver configured to perform a millimeter-wave scanning operation on the body of the inspected human standing on the base so as to detect whether or not the inspected human carries contraband and output a first signal; and a metal sensing detector arranged within the base and configured to detect whether or not there is a metallic foreign object in underside of a shoe of the inspected human and output a second signal.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-07-01

A CT system and method thereof are discloses. The system includes: a conveyor mechanism (110); a first scanning stage (A) configured to scan the object and generate a first digital signal; a second scanning stage (B) spaced from the first scanning stage at a preset distance in a direction of the objects movement; a processing device (130) configured to reconstruct a CT image of the object at a first image quality based on the first digital signal, and analyze the CT image; and a control device (140) configured to adjust a scanning parameter of the second scanning stage based on an analysis result of the processing device to cause the second scanning stage to output a second digital signal. The processing device reconstructs a CT image of the object at a second image quality higher than the first image quality at least based on the second digital signal. The system takes full advantage of the distributed ray sources which replace the normal slip ring technology.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-10-31

CT Devices and methods thereof are disclosed. The CT device comprises an electron beam generation unit, a circular reflection target (9) and a circular detector array. The electron beam generation unit comprises an electron gun (7), a deflection scanning unit and a restrictor (16), wherein the electron gun (7) generates electron beams, the deflection scanning unit deflects the electron beams with a deflection direction varying as time so as to implement a circular scanning, and the restrictor (16) has a plurality of circularly distributed holes, and wherein when the electron beams scan along the circularly distributed holes, a plurality of electron beams that are distributed circularly are output. The circular reflection target (9) is disposed to be coaxial with the circularly distributed electron beams, wherein the circularly distributed electron beams bombard the circular reflection target (9) to generate X-rays that intersect the axis of the circularly distributed electron beams. The circular detector array (11) is disposed to be coaxial with the circular reflection target and includes a plurality of detection units which receive the X-rays after they have passed through an object to be detected (10).


Patent
Tsinghua University and Protgen Ltd. | Date: 2015-02-13

The present invention relates to the diagnosis and treatment of cancer, and specifically to a method of diagnosing the presence, status or metastasis of cancer by detecting plasma Hsp90 having the amino acid sequence of SEQ ID NO:1 as a tumor marker. In addition, the present invention also relates to a method for the treatment of cancer and metastasis.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-07-02

Disclosed are methods for extracting shape feature of an object, security inspection methods and apparatuses. The present disclosure makes use of the CTs capability of obtaining 3D structure, utilizes the shape of an object in an inspected luggage as feature of suspicious object in combination with material property of the object. The present disclosure is useful for reducing false alarm rate in detection of suspicious explosives, and easy to implement.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-02-24

The present invention discloses a vehicle inspection system comprising:- a radiation source, an inspection passage (101) enabling a vehicle to pass, a dragging system (100) comprising a first (111) and a second dragging means (112) arranged along a vehicle dragging direction (E); in this direction, the first dragging means is arranged at the upstream of the second dragging means, and a separating section (113) is arranged between these dragging means, so these dragging means are separated by a preset distance. The first and second dragging means (111;112) include a supporting plate , an elongated traction element and a pushing element connected therewith. These elongated traction elements are continuous and integrated, thus the elongated traction elements and pushing elements extends on the separating section; the supporting plates of the dragging means are separated and two pieces type. No supporting plate is provided on the separating section.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-12-11

The present disclosure discloses an alignment system and an alignment method for a container or vehicle inspection system, and an inspection system. The inspection system comprises comprising an ray source, a collimator, a detector arm and a detector module mounted on a detector arm, the ray source, the collimator and the detector module are arranged to form an inspection passage, a ray beam emitted from the ray source passes through collimator and irradiates onto an inspected object, and an attenuated ray beam is collected by the detector module so as to complete inspection. The alignment system comprises a measuring module arranged to receive the ray beam emitted from the collimator and to measure the ray beam so as to determine positions and orientations of the ray source and the collimator. With the alignment method, alignment between a center point of the ray source, a central line of a detector tip and a central line of the collimator may be more accurately measured.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-03-27

The present invention discloses a scanning device of back-scatter imaging with a radiation beam, comprising: a radiation source; a fixed shield plate and a rotatable shield body disposed between the radiation source and a object to be scanned respectively, wherein the fixed shield plate is stationary with respect to the radiation source and the rotatable shield body is rotatable with respect to the fixed shield plate. The fixed shield plate is provided with a ray passing-through region thereon, which allows for a radiation beam from the radiation source to pass through the fixed shield plate, a ray incidence region and a ray emergence region are arranged on the rotatable shield body respectively, during the rotatable scanning of the rotatable shield body, the ray passing-through region of the fixed shield plate continuously intersects with the ray incidence region and the ray emergence region of the rotatable shield body to generate collimated holes for scanning. The ray passing-through region of the fixed shield plate is a rectilinear slit, the rotatable shield body is a cylinder, and the ray incidence and emergence regions are configured to be a series of small discrete holes disposed along a spiral line respectively. In addition, the present invention discloses a scanning method for back-scatter imaging with a radiation beam.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-07-02

The present invention discloses a three-dimensional data processing and recognizing method. It comprises following steps of: scanning and reconstructing objects to be detected so as to obtain three-dimensional data for recognition of the objects to be detected; extracting data matching to features from the three-dimensional data, so that the extracted data constitute an interested target; with respect to the data matching to features, merging and classifying adjacent data points as one group, to form an image of the merged interested target; recognizing a cross section of the interested target; cutting the interested targets by at least one perpendicular plane which passes through a central point of the cross section and is perpendicular to it, in order to obtain a graph; and recognizing shape of the interested targets based on property of the graph.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-03-18

The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-12-30

The present disclosure discloses a detector device comprising a plurality of detector assemblies (21). Each detector assembly comprises at least one detection crystal units (22) having a first energy response and those (23) having a second energy response, which are both arranged along a first direction (B) at intervals, each detection crystal unit having a first/second energy response including at least one detection crystals having a first/second energy response arranged along a second direction (C). The at least one detection crystal units having a first energy response and the at least one detection crystal units having a second energy response are, at least partially, alternatively arranged along the first direction when viewed from an incidence direction of the X-ray. The present disclosure also discloses a dual energy CT system having the detector device and a CT detection method using this system.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-04-02

A triggering device (100) for an optical detection instrument and an optical detection instrument are provided. The triggering device may include: a triggering switch (1) configured to start an optical detection to emit a detecting light when the triggering switch is triggered, a hollow shaft (2) for accommodating an optical path, the hollow shaft being configured to allow the detecting light to pass through its cavity to reach an object to be detected, the hollow shaft and the triggering switch having a fixed relative position, and a sliding trigger (3) configured to move towards or away from the triggering switch with respect to the hollow shaft to trigger or reset the triggering switch. The triggering device can automatically start the detection operation of the optical detection instrument and stop the detection operation timely, by moving the sliding trigger with respect to the triggering switch. It can not only improve the triggering speed and efficiency of the triggering device, but also reduce the complication of the detection operation so as to avoid loss caused by faults of the triggering operation and resetting operation.


Patent
Protgen Ltd. and Tsinghua University | Date: 2013-08-08

The present invention relates to a method of identifying cancer subjects, in particular human patients, who are suitable for anti-lymphangiogenesis therapy to prevent tumor growth and tumor metastasis. The present invention also relates to a new approach, which uses nucleolin as a bait to search and screen for lymphangiogenesis inhibitors or cancer suppressors, which function in a manner that is analogous to endostatin. The invention is based upon the discovery that nucleolin is specifically expressed on lymphangiogenic vessels and functions as a specific receptor for endostatin, and thus is involved in the signal transduction pathway of endostatin as an anti-lymphangiogenesis inhibitor. The present invention also discloses that cell surface nucleolin on lymphatic endothelial cells is a biomarker for lymphangiogenic vessels, which could be used for the prediction of tumor metastasis.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-09-16

The present disclosure discloses a method for controlling a standing wave accelerator and a system thereof. The method comprises: generating, by an electron gun, an electron beam; injecting the electron beam into an accelerating tube; and controlling a microwave power source to generate and input microwave with different frequencies into the accelerating tube, so that the accelerating tube switches between different resonant modes at a predetermined frequency to generate electron beams with corresponding energy. According to the above solution, it only needs to change the output frequency of the microwave power source in the process of adjusting energy, without making any change to the accelerating structure per se. Therefore, the method is easy to operate. In addition, the structure of the accelerating tube in the above system is simple, without adding a particular regulation apparatus.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-09-16

The present disclosure discloses an electron linear accelerator system. In the present disclosure, a fast-switching dual-path microwave system is proposed, wherein, one path can be directly connected to an accelerating tube, and the other path can be input into the accelerating tube after a magnitude of the microwave power is changed by devices such as an attenuator, a power divider, a pulse compressor or even an amplifier etc., so as to achieve fast switch of the power input into the accelerator and adjust the energy output by the accelerator.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-11-05

The present invention provides a pulse modulating power source, which comprises: a plurality of discharging modules connected in series during discharging; a plurality of triggers corresponding to said plurality of discharging modules, wherein each trigger provides a trigger signal to the corresponding discharging module to turn it on; a control logic module for controlling the trigger signals so as to turn on said plurality of discharging modules successively with a time delay; an output terminal for outputting a voltage.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-03-25

The present application provides a curved surface array distributed x-ray apparatus, characterized in that, it comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units (1) arranged on the wall of the vacuum box in multiple rows along the direction of the axis of the curved surface in the curved surface facing the axis; an anode (2) made of metal and arranged in the axis in the vacuum box which comprises an anode pipe and an anode target surface; a power supply and control system having a high voltage power supply connected to the anode, a filament power supply connected to each of the plurality of the electron transmitting units, a grid-controlled apparatus connected to each of the plurality of electron transmitting units, a control system for controlling each power supply.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-09-23

A straight trajectory CT device can be used in radiation imaging. The device includes: a ray-generating unit that generates a ray within a specific range of field angle; a channel for an object to be inspected though which the object to be inspected passes; a first collimator; and a ray receiving unit provided on both sides of the channel for the object to be inspected. The ray beam is received by the ray receiving unit after penetrating the first collimator and the object to be inspected in order. The ray generating unit is static and the first collimator moves in the same direction as the ray receiving unit. This direction is parallel to the channel for the object to be inspected. The device can complete computed tomography with a minimum of one ray receiving unit, thereby simplifying the structure of the device and reducing its cost.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-09-23

An apparatus and a method are for generating a flattening x-ray radiation field. The apparatus includes: plurality of electron accelerators for generating high-energy electron beam current; and a common target unit including a vacuum target chamber, a target and plurality of input connectors. The plurality of input connectors are connected to one side of the vacuum target chamber and the target is installed at the other side of the vacuum target chamber opposing the plurality of input connectors, the axes of which intersect in pairs at one point in an predetermined included angle. The plurality of electron accelerators are connected to the plurality of input connectors.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-03-25

The present application relates to an apparatus and a method for generating flattening x-rays radiation field. The apparatus generating flattening x-rays radiation field comprises: multiple electron accelerators (1a, 1b) for generating high-energy electron beam current; and common target unit (2) comprising vacuum target chamber, target and multiple input connecting means (103a, 103b); wherein, the multiple input connecting means are connected to one side of the vacuum target chamber and the target is installed at the other side of the vacuum target chamber opposing the multiple input connecting means, the axes of which intersect in pairs at one point in an predetermined included angle. The multiple electron accelerators are connected to the multiple input connecting means.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-07-02

A human body back-scattering inspection system is disclosed. The system comprises a flying-spot forming unit configured to output beams of X-rays, a plurality of discrete detectors which are arranged vertically along a human body to be inspected, and a controlling unit coupled to the flying-spot forming unit and the plurality of detectors, and configured to generate a control signal to control the flying-spot forming unit and the plurality of detectors to perform a partition synchronous scan on the human body to be inspected vertically. The present disclosure utilizes the geometry property of the human body back-scattering inspection system, and proposes a multiple-point synchronous scan mechanism which largely accelerates the inspection of human body.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-07-02

The present invention discloses a human body security inspection apparatus and a corresponding method. Specifically, the apparatus comprises: a human body security inspection device (1), configured to scan the human to be inspected (2) in order to inspect whether the human to be inspected (2) carries prohibited articles; a KINECT sensor (3), configured to real-timely acquire information about the human to be inspected (2) so that the human body security inspection device (1) is capable of real-timely acquiring the information of the human to be inspected (2) by means of the KINECT sensor (3), so as to determine whether the information conforms to requirements of the human body security inspection device (1); and a data processing device (4), configured to communicate with the human body security inspection device (1) and the KINECT sensor (3), in order to real-timely analyse and process the information of the human to be inspected (2).


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-06-03

The present disclosure provides an X-ray generator with adjustable collimation. The X-ray generator comprises: an assembly of X-ray source, which includes an X-ray tube having a cathode and an anode and a front collimator; a high voltage generator, which is disposed in an extended chamber of a housing for the X-ray tube and which is used for supplying a direct current high voltage between the cathode and the anode of the X-ray tube to excite X-ray beams; a collimation adjustment unit, which is rotatably disposed outside of the front collimator and which is used for adjusting fan-type X-ray beams into continuous pencil-type X-ray beams; and a cooling unit, which is independently mounted to the X-ray tube and which is used for cooling the anode of the X-ray tube; wherein, the assembly of X-ray source, the high voltage generator, the collimation adjustment unit and the cooling unit are integrated as a whole. The X-ray generator with adjustable collimation according to the disclosure has a compact construction, which is helpful in miniaturization, modularization and high efficiency of a security detection equipment.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-11-04

CT Devices and methods thereof are disclosed. The CT device comprises an electron beam generation unit, a circular reflection target (9) and a circular detector array. The electron beam generation unit comprises an electron gun (7), a deflection scanning unit and a restrictor (16), wherein the electron gun (7) generates electron beams, the deflection scanning unit deflects the electron beams with a deflection direction varying as time so as to implement a circular scanning, and the restrictor (16) has a plurality of circularly distributed holes, and wherein when the electron beams scan along the circularly distributed holes, a plurality of electron beams that are distributed circularly are output. The circular reflection target (9) is disposed to be coaxial with the circularly distributed electron beams, wherein the circularly distributed electron beams bombard the circular reflection target (9) to generate X-rays that intersect the axis of the circularly distributed electron beams. The circular detector array (11) is disposed to be coaxial with the circular reflection target and includes a plurality of detection units which receive the X-rays after they have passed through an object to be detected (10).


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-01-06

The present disclosure provides a mobile back scattering imaging security inspection apparatus, comprising: a back scattering scanner (2), a detector (3), a controller (4), and a movable stage (1) configured to carry the back scattering scanner, the detector and the controller and being movable with respect to the object to be inspected; wherein the back scattering scanner is a distributed X-ray source comprising a plurality of target points (201), each of which is able to emit the ray beam individually, and wherein the back scattering scanner, the detector and the controller perform an imaging security inspection operation on the object to be inspected during moving along with the movable stage with respect to the object.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2016-07-07

Methods for extracting a shape feature of an object and security inspection methods and apparatuses. Use is made of CTs capability of obtaining a 3D structure. The shape of an object in an inspected luggage is used as a feature of a suspicious object in combination with a material property of the object. For example, a false alarm rate in detection of suspicious explosives may be reduced.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-07-02

A CT apparatus without a gantry is disclosed. The CT apparatus comprises a scanning passage; a stationary X-ray source arranged around the scanning passage and comprising a plurality of ray emission focal spots; and a plurality of stationary detector modules arranged around the scanning passage and disposed opposite the X-ray source. In embodiment, at least some of the plurality of detector modules are arranged substantially in an L shape, a semicircular shape, a U shape, an arc shape, a parabolic shape, or a curve shape when viewed in a plane intersecting the scanning passage. The present invention ensures that the stationary gantry type CT system has a small size, and a high data identification accuracy.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-12-09

The present disclosure provides an X-ray generator with adjustable collimation. The X-ray generator comprises: an assembly of X-ray source, which includes an X-ray tube (203) having a cathode and an anode and a front collimator (302); a high voltage generator (100), which is disposed in an extended chamber of a housing for the X-ray tube and which is used for supplying a direct current high voltage between the cathode and the anode of the X-ray tube to excite X-ray beams; a collimation adjustment unit (301), which is rotatably disposed outside of the front collimator and which is used for adjusting fan-type X-ray beams into continuous pencil-type X-ray beams; and a cooling unit (401, 402, 403), which is independently mounted to the X-ray tube and which is used for cooling the anode of the X-ray tube; wherein, the assembly of X-ray source, the high voltage generator, the collimation adjustment unit and the cooling unit are integrated as a whole. The X-ray generator with adjustable collimation according to the disclosure has a compact construction, which is helpful in miniaturization, modularization and high efficiency of a security detection equipment.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-12-31

A raman spectroscopy method of measuring melamine contents in dairy products having different matrixes. The method includes: (a) establishing a database of characteristic curves of dairy products having different matrixes; (b) taking several copies of the dairy products having one certain unknown matrix and adding melamine standard solutions having different concentrations therein, to obtain a series of dairy product samples in which the relative concentrations of the melamine are known; (c) performing raman spectrum testing analysis and obtaining corresponding characteristic peak intensities to obtain a slope of the characteristic curve showing variation of the characteristic peak intensities with the relative concentrations of the melamine; (d) searching the database of step (a) using the slope of the characteristic curve of the dairy product samples to find a matching characteristic curve, and (e) calculating concentration of melamine in the dairy products by using the matched characteristic curve and the characteristic peak intensity.


Patent
Fude Beijing Chemical & Industry Co. and Tsinghua University | Date: 2014-04-16

The present invention provides a fluidized bed reactor and its use for producing olefins from oxygenates, the fluidized bed reactor comprises: a reaction zone located in the lower portion of the fluidized bed reactor and comprising a lower dense phase zone and an upper riser, wherein the dense phase zone and the riser are connected with each other transitionally; a separation zone located in the upper portion of the fluidized bed reactor and comprising a settling chamber, a fast gas-solid separation means, a cyclone and a gas collecting chamber, wherein the riser extends upwardly into the separation zone and is connected at its outlet with the inlet of the fast gas-solid separation means, the fast gas-solid separation means is connected at its outlet with the inlet of the cyclone via a fast gas passage, the cyclone is connected at its outlet with the gas collecting chamber, and the gas collecting chamber is located below the reactor outlet and connected therewith; and a catalyst recycle line for recycling the catalyst from the settling chamber back to the dense phase zone, a catalyst withdrawl line for withdrawing the deactivated catalyst from the settling chamber and/or the dense phase zone to the catalyst regeneration means, and a catalyst return line for returning the regenerated catalyst from the catalyst regeneration means to the dense phase zone.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-01-10

The invention provides a semiconductor detector, and the semiconductor detector comprises a semiconductor crystal, a cathode, an anode and at least one ladder electrode; the semiconductor crystal comprises a top surface, a bottom surface and at least one side; the cathode, the anode and the ladder electrode are conductive thin films deposited on a surface of the semiconductor crystal; the cathode is disposed on the bottom surface of the semiconductor crystal, the anode is disposed on the top surface of the semiconductor crystal, the ladder electrode is disposed on the at least one side of the semiconductor crystal; and the ladder electrode comprises a plurality of sub-electrodes. As compared to the prior art, the semiconductor detector can improve the energy resolution.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-01-02

Provided are image processing method and apparatus. The method includes selecting one of a plurality of images matched in structure as reference image, and select another of the images as subject image; for a subject pixel in the subject image, determining a pixel corresponding to the subject pixel in the reference image; calculating similarity values of at least part of pixels in the reference image with respect to the pixel corresponding to the subject pixel; establishing weight coefficients based on the similarity values, and weighted averaging the subject pixel in the subject image to obtain a processed pixel value. With the above solutions, it is possible to use structure information of a higher-quality image in processing another image, and thus improve quality of the other image.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-10-29

The invention provides a semiconductor detector (100), and the semiconductor detector (100) comprises a semiconductor crystal (101), a cathode (102), an anode (103) and at least one ladder electrode (104); the semiconductor crystal (101) comprises a top surface (101-2), a bottom surface (101-1) and at least one side (101-3); the cathode (102), the anode (103) and the ladder electrode (104) are conductive thin films deposited on a surface of the semiconductor crystal (101); the cathode (102) is disposed on the bottom surface (101-1) of the semiconductor crystal (101), the anode (103) is disposed on the top surface (101-2) of the semiconductor crystal (101), the ladder electrode (104) is disposed on the at least one side (101-3) of the semiconductor crystal (101); and the ladder electrode (104) comprises a plurality of sub-electrodes. As compared to the prior art, the semiconductor detector can improve the energy resolution.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2012-06-27

The invention discloses a method and apparatus for CT image reconstruction. The method for CT image reconstruction of the present invention comprises the steps of: selecting projection data of the same height on a curve having a curvature approximate to that of the scanning circular orbit; implementing weighting processing on the selected projection data; filtering the weighting processed projection data along the horizontal direction; implementing three-dimensional back projection on the filtered projection data along the direction of ray. The apparatus for CT image reconstruction of the present invention comprises a rebinning unit, a weighting unit, a filtering unit and a back projection unit. Employment of the technical solution of the invention can effectively eliminate cone beam artifact under a large cone angle.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-07-22

The present application discloses a detector module, which is arranged on a detector arm, comprising one or a plurality of detector units arranged in a scattered configuration, wherein each of the detector units in the detector module is installed aiming at a beam center of a ray source, thus improving imaging quality and reducing the size of a detector frame drastically.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-12-16

A human body back-scattering inspection method and system are discloses. The method includes: obtaining a back-scattering scan image of a human body under inspection; distinguishing a body image from a background image in the back-scattering scan image; and calculating a feature parameter of the background image to determine whether radioactive substance is carried with the human body. With some embodiments of the present disclosure, it is possible to determine whether any radioactive substance is carried with a human body during back-scattering inspection of the human body. In further embodiments of the present disclosure, it is possible to approximately determine which part(s) of the human body carries the radioactive substance. This improves efficiency of inspection.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-04-01

A raman spectrum measuring method for drug inspection is provided, comprising: measuring raman spectrum of a sample to be inspected to acquire an original raman spectrum curve of the sample to be inspected; determining whether the original raman spectrum curve has a characterizing portion, and if not, measuring a mixture of the sample and an enhancing agent to acquire an enhanced raman spectrum curve of the sample to be inspected; and if the original raman spectrum curve of the sample to be inspected has a characterizing portion, comparing the original raman spectrum curve of the sample with data in an original raman spectrum database of the drug to determine whether the sample contains the drug, otherwise, if the original raman spectrum curve of the sample to be inspected does not have the characterizing portion, comparing the enhanced raman spectrum curve of the sample with data in an enhanced raman spectrum database of the drug to determine whether the sample to be inspected contains the drug.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-07-01

The present invention provides an X-ray generating apparatus and an X-ray fluoroscopy imaging system comprising the same. The X-ray generating apparatus comprises: an electron accelerator (1) including an electron acceleration unit (101), an electron emission unit (102), and a target (103); and a shielding and collimating device (2), including a shielding structure (201) and a collimator (202) arranged in the shielding structure, wherein the target is surrounded by the shielding structure, the collimator is arranged in a direction passing through the target point and forming an angle from 30 degrees to 150 degrees with the electron beam shooting the target.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-01-17

The disclosure provides a multi-power multi-dosage accelerator. The multi-power multi-dosage accelerator comprises an electron gun configured to provide a first voltage of the electron gun and a second voltage of the electron gun, and an accelerating tube configured to generate a first X-ray having a first dosage and first power according to the first voltage of the electron gun and generate a second X-ray having a second dosage and second power according to the second voltage of the electron gun, wherein the first dosage is a dosage which can be accepted by human bodies and is much less than the second dosage, the first X-ray is used for inspecting a first area where a person is located, and the second X-ray is used for inspecting a second area where goods are located.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-07-01

Multi-spectral static CT apparatuses are disclosed. The apparatus includes a ray source in a form of multiple distributed spots, multiple columns of detectors, a data acquisition device, a luggage carrying and control device, and a multi-spectral projection data processing device. An object of the present disclosure is to combine static CT scanning technology with multi-spectral analysis technology. It has advantages of the static CT system, such as high scanning speed, simple mechanic structure, cost reduction due to omission of slip ring. It also can perform identification of material in an article, and can be widely applied in occasions like safety inspection, and smuggling suppression at customs.


The present disclosure relates to a Raman spectrum detection system, which comprises a light source for emitting excitation light that excites a detected object to emit Raman light; an external light path system for irradiating light emitted from the light source on the detected object and collecting the Raman light emitted by the detected object; a light detection device for receiving the Raman light collected by the external light path system and detecting said Raman light to obtain spectrum data thereof; a control device for controlling the excitation light source to provide the excitation light, controlling the light detection device to detect the Raman light, receiving the spectrum data output from the light detection device, and analyzing said spectrum data to identify the detected object; and an automatic calibration device for holding the standard sample and for automatically calibrating the system. The present disclosure also relates to a method for detecting an object using the Raman spectrum detection system, and a method for automatically calibrating the Raman spectrum detection system.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-03-09

The present invention discloses a vehicle-mounted inspection system. The vehicle-mounted inspection system comprises: a chassis (1011); a rotation mechanism (105) disposed on the chassis; a first ray emission device (102) connected to the rotation mechanism and configured to emit a ray; a first detection device connected to the rotation mechanism and configured to receive the ray emitted by the first ray emission device; and a second ray emission device (112) connected to the rotation mechanism and configured to emit a ray. The rotation mechanism is configured to rotate the first ray emission device, the first detection device and the second ray emission device substantially around an upright axis between a retracted position and an operating position. The vehicle-mounted inspection system according to the embodiments of the present invention comprises a plurality of ray emission devices and a plurality of detection devices, which acquires transmission images of an object under inspection viewed from a plurality of angles.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-07-19

Disclosed are a method and a device for security-inspection of liquid articles with dual-energy CT imaging. The method comprises the steps of obtaining one or more CT images including physical attributes of liquid article to be inspected by CT scanning and a dual-energy reconstruction method; acquiring the physical attributes of each liquid article from the CT image; and determining whether there are drugs concealed in the inspected liquid article based on the difference between the acquired physical attributes and reference physical attributes of the inspected liquid article. The CT scanning can be implemented by a normal CT scanning technique, or a spiral CT scanning technique. In the normal CT scanning technique, the scan position can be preset, or set by the operator with a DR image, or set by automatic analysis of the DR image.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-02-18

There is provided a wideband patch antenna and an antenna array. The antenna includes a dielectric substrate of a rectangle shape, a radiation patch formed on a top surface of the dielectric substrate, a coupling patch formed on the top surface of the dielectric substrate and extending from a side of the dielectric substrate to a position from the radiation patch by a distance, a metal support arranged on the lower surface of the dielectric substrate and extending from the edge of the lower surface of the dielectric substrate downward to the ground, a layer of air having a predetermined thickness being formed between the lower surface of the dielectric substrate and the ground. According to the embodiments, it is possible to improve the directivity of the wideband microstrip antenna while maintaining its small size.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-05-20

The present disclosure provides method and apparatus for marking a target in a 3D image. The method include steps of: acquiring Computed Tomography (CT) image data of a scene; rendering a 3D image of the scene using ray casting based on the CT image data; removing a transparent region from the 3D image based on a fixed 2D transfer function; and marking the target in the 3D image.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2013-10-31

CT imaging systems and methods thereof are disclosed. A common CT scanning is performed on an object to obtain a common CT imaging. An area of interest is determined from the image. A CT scanning is performed on the area of interest under a plurality of energy windows by a photon counter detector. A high resolution image of the area of interest is reconstructed. The discrimination of energy spectrum is higher and the result so obtained is more stable by using a photon counter detector to collect photon count projection data of a plurality of energy windows and thus it may be decomposed into a plurality of basis functions.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-05-08

The present invention discloses an article inspection device, comprising: a x-ray machine, a collimation unit (4), a transmission detector array (10) and a scattering detector array (12). The scattering detector array comprising a plurality of same scattering detector modules arranged in a matrix of i-rows and j-columns. A transmission cross section (8) of the article (7) transmitted by the x-rays is divided into a plurality of same sub-regions arranged in a matrix of i-rows and j-columns. The plurality of scattering detector modules arranged in i-rows and j-columns correspond to the plurality of sub-regions arranged in i-rows and j-columns one by one for detecting pair production effect annihilation photons and Compton-effect scattering photons from the respective sub-regions. Obtaining atomic numbers of the respective sub-regions based on a ratio of the pair production effect annihilation photon count to the Compton-effect scattering photon count, so as to form a three-dimensional image of the article. In addition, the present invention further discloses an article inspection method.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-03-11

The present invention discloses a millimetre wave three dimensional holographic scan imaging apparatus and a method for inspecting an object to be inspected using the same. The apparatus comprises a millimetre wave transceiver module comprising a millimetre wave transceiver antenna array for transmitting and receiving a millimetre wave signal; a guide rail device, to which the millimetre wave transceiver module is connected in slidable form, such that the millimetre wave transceiver module is moveable along the guide rail device to perform a scan on an object to be inspected; wherein the scan performed by the millimetre wave transceiver module is a plane scan. The apparatus and the method as described above can reduce the length of the millimetre wave transceiver antenna array and thus the cost thereof.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-04-02

The present disclosure provides methods and devices for locating a plurality of interested objects in CT imaging. Location of the interested objects in the three-dimensional space can be determined by using three projection images that are substantially perpendicular to each other. The method can rapidly locate interested objects in a CT image without pre-reconstruction of the CT image even if there are a plurality of interested objects in the field of view. The algorithm does not involve interactive steps. The method is rapid and effective, and thus applicable to industrial applications.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-07-02

The present invention relates to multi-energy CT imaging system and imaging method. The multi-energy CT imaging system comprises: a stage for carrying the object to be inspected; voltage-regulatable X-ray generation device for emitting X-rays; a detector for receiving X-rays emitted from said X-ray generation device and penetrating said object to be inspected, and for outputting detection data; a rack having said X-ray generation device and said detector mounted thereon; and a data processing and control device for controlling said stage, said X-ray generation device, said detector and said rack, processing detected data, and during one rotation of scan of said X-ray generation device, evenly dividing the circular track of said X-ray generation device into angle intervals of a predetermined number according to the predetermined number of energies and setting a different high voltage of said X-ray generation device for each angle interval, and when said rack rotates from the current angle interval into a next angle interval, controlling said X-ray generation device to switch it to a voltage set in the next angle interval.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-04-02

The present invention discloses apparatus and method for ray scanning imaging. The apparatus comprises a plurality of ray generators and a ray detection device. The plurality of ray generators are arranged uniformly along a circular arc and emit ray beams in sequence or simultaneously to an object to be inspected within a single scanning period. The ray detection device may be either in a multi-segmental semi-closed configuration composed of a plurality of linear arrays of ray detectors or in a circular arc configuration where a plurality of ray detection units arranged uniformly along a circular arc. During the inspection, the apparatus is advantageous in obtaining the complete ray projection values without rotation thereof, so as to effectively shorten the inspection time.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-08-26

A human body back-scattering inspection method and system are discloses. The method includes: obtaining a back-scattering scan image of a human body under inspection; distinguishing a body image from a background image in the back-scattering scan image; and calculating a feature parameter of the background image to determine whether radioactive substance is carried with the human body. With some embodiments of the present disclosure, it is possible to determine whether any radioactive substance is carried with a human body during back-scattering inspection of the human body. In further embodiments of the present disclosure, it is possible to approximately determine which part(s) of the human body carries the radioactive substance. This improves efficiency of inspection.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-07-01

The disclosure provides a whole-course visualization system for logistics articles, including: an information collecting subsystem, including a plurality of information collecting units, which are respectively deployed at different sites along a logistics route, and configured to collect ID information of a parcel and acquire image information of an article in the parcel; and an information center processing subsystem, configured to store and manage data of the ID information and image information collected by and sent from the information collecting units, and send the stored data to the information collecting units according to requests from information collecting units; wherein the information collecting units compare data sent from the information center processing subsystem with the ID information and image information collected by information collecting units, and determine whether the collected ID information and image information are consistent with the data sent from information center processing subsystem.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-07-01

A pesticide residue detection method (10) is disclosed, comprising the steps: (a) irradiating a sample to be detected by an exciting light and collecting a Raman scattered light from the sample (300); (b) acquiring a Raman spectrum of the sample from the collected Raman scattered light (400); and (c) comparing the Raman spectrum with reference Raman spectra for known pesticides in a reference Raman library to determine composition and concentration of the pesticide residue in the sample (500). The method (10) may achieve effective, convenient and accurate inspection of the pesticide residue in foods, in particular suitable for rapid detection.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-08-06

The present disclosure provides a radiation detector, comprising: a semiconductor crystal (101) for detecting radiation, the semiconductor crystal comprising a top surface, a bottom surface, and at least one side surface; at least one anode (103) arranged on at least one of the top surface, the bottom surface, and the at least one side surface; and at least one cathode (102) arranged on at least another one of the top surface, the bottom surface, and the at least one side surface, wherein the at least one anode each has a stripe shape, the at least one cathode each has a planar or curved shape, and the at least one cathode and the at least one anode extend in parallel with respect to each other to a length substantially equal to that of the anode. Such an electrode structure can improve energy resolution and detection efficiency of the radiation detector effectively.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-05-13

The present invention discloses a vehicular radiation inspection system comprising a mobile vehicle body, a detection arm, a radiation source and a detector. The vehicular radiation inspection system further comprises a following mechanism separated from the detection arm. The following mechanism contains radiation protection material, and the following mechanism follows the detection arm to move in a non-contact manner during inspection of the inspected object, so as to prevent radiation leakage. In the present invention, it does not need to infuse radiation protection material having a high density, such as lead, into the detection arm. Therefore, it can effectively decrease the weight of the detection arm, and it does not need to provide a balance counterweight on the mobile vehicle body on which the detection arm is carried, thereby effectively solving the problem that the vehicular radiation inspection system has an excessively large mass. Meanwhile, in the present invention, the moving process of the following mechanism is accurately controlled, so as to prevent the following mechanism from hitting the detection arm.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-08-14

The present disclosure is directed to a low cost sintering process for the preparation of gadolinium oxysulfide having a general formula of Gd_(2)O_(2)S, referred to as GOS, scintillation ceramics, comprising uniaxial hot pressing primary sintering and hot isostatic pressing secondary sintering.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-08-14

The present disclosure is directed to a rapid process for the preparation of gadolinium oxysulfide having a general formula of Gd_(2)O_(2)S, referred to as GOS, scintillation ceramics by using the combination of spark plasma primary sintering (SPS) and hot isostatic pressing secondary sintering.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-03-25

A x-ray apparatus of the present application comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units (1) arranged in a linear array and installed on the wall at one end within the vacuum box, each electron transmitting unit is independent to each other; the electron transmitting unit having: a heating filament; a cathode connected to the heating filament; a grid arranged above the cathode opposing the cathode;anode (2) made of metal and installed at the other end of the vacuum box, and in the direction of length, the anode is parallel to the plane of the grid of the electron transmitting unit, and in the direction of width, the anode has a predetermined angle with respect to the plane of the grid of the electron transmitting unit.


Disclosed is a method for identifying a moving object, comprising: a driving-in step of moving a moving object into a passage, a velocity measuring step of measuring a moving velocity of the moving object, a light beam emitting step of emitting light beams from one side of the passage, a light beam receiving step of receiving the light beams not shielded by the moving object at other side of the passage, a profile determining step of determining a profile of at least one portion of the moving object based on the received light beams and the measured moving velocity of the moving object, and an identifying step of determining type of the moving object by comprising the profile of the at least one portion of the moving object with information of moving objects stored previously. The method and the system according to the present invention can adopt corresponding scanning controlling manners for different vehicles, so that inspection information of inspected vehicles is complete, inspection images are of high quality, and radiation dose received by drivers are minimal.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-05-08

Disclosed is a millimeter-wave receiving device. The device includes at least one radiometer (83); and a positioning assembly (824) for holding the radiometer (83), wherein the positioning assembly (824) comprises: a first positioning member (82) having a first surface (821); a second positioning member (84) having a second surface (841), the first surface (821) of the first positioning member (82) and the second surface (841) of the second positioning member (84) holding the radiometer (83) in opposite to each other. With the configuration according to the present invention, the at least one radiometer (83) in the millimeter-wave receiving device can be located in all of freedoms on basis of various design requirements of the radiation path to ensure that the radiometer (83) can be arranged in desired receiving positions.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2012-12-28

The present invention provides a high voltage pulse modulating power source based on alternate group triggering, which comprises: a DC stabilized voltage source for supplying power to the high voltage pulse modulating power source; a plurality of solid-state switches; a plurality of triggers corresponding to said plurality of solid-state switches, wherein each trigger provides a trigger signal to its corresponding solid-state switch to turn on said corresponding solid-state switch, wherein said plurality of triggers are divided into at least two groups of triggers; a time sequence control module, which, at time t1, controls said plurality of triggers to generate trigger signals so as to turn on said plurality of solid-state switches simultaneously, and at time t2, controls one group of said at least two groups of triggers to generate trigger signals to turn on solid-state switches corresponding to this group of triggers, wherein time t1 and time t2 appear alternately.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-04-08

The present application provides an external thermionic cathode distributed x-ray apparatus, comprises: a vacuum box (3) which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units (1) arranged in a linear array and installed on the side wall of the vacuum box, each electron transmitting unit (11,12,13,14) is independent to each other; an anode (2) installed in the center inside the vacuum box, and in the direction of length, the anode is parallel to the orientation of the electron transmitting unit, and in the direction of width, the anode has a predetermined angle with respect to the plane of the electron transmitting unit; and a power supply and control system (7) having a high voltage power supply (702), a focusing power supply; a transmitting control means (703) and a control system (701); the electron transmitting unit having: a heating filament; a cathode connected to the heating filament; an insulated support enclosing the heating filament and the cathode; a focusing electrode, arranged at the upper end of the insulated support by way of locating above the cathode; and a connecting fastener arranged above the focusing electrode and connected to the wall of the vacuum box; wherein, the filament lead is connected to the transmitting control means through the insulated support.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-07-22

The present disclosure relates to a method and device for estimating a point spread function. In one implementation, a method includes capturing, by a scanning device, an image by scanning a plurality of rectangle blocks which are same sized and closely arranged, wherein the plurality of rectangle blocks are made of different materials and/or have different mass thicknesses, and an incident direction of rays is perpendicular to a scanning direction and a surface of the plurality of rectangle blocks arranged closely during scanning; obtaining line spread functions for two directions along a length side and a width side of each of the rectangle blocks based on the scanned image, and obtaining standard deviation parameters of the line spread functions; and combining the standard deviation parameters for the two directions to obtain a two dimensional Point Spread Function (PSF) parameter so as to estimate the point spread function.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-12-23

The present invention discloses A vehicle dragging system, comprising a first dragging means and a second dragging means, which are sequentially arranged along a vehicle dragging direction, wherein in the vehicle dragging direction, the first dragging means is arranged at the upstream of the second dragging means, and a separating section is arranged between the first dragging means and the second dragging means, so that the first dragging means is separated from the second dragging means by a preset distance in the vehicle dragging direction, wherein the first dragging means comprises a first supporting plate, a first elongated traction element and a first pushing element connected with the first elongated traction element, and the first pushing element is adapted to move around the first supporting plate for pushing wheels to move along the first supporting plate, in order to drive a vehicle to advance; the second dragging means comprises a second supporting plate, a second elongated traction element and a second pushing element connected with the second elongated traction element, and the second pushing element is adapted to move along the second supporting plate for pushing wheels to move along the second supporting plate, in order to drive the vehicle to advance.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-12-23

The present disclosure provides a dual-source security inspection CT scanning system and scanning method. The system includes two sets of scan imaging systems, wherein each set of the scan imaging systems has its own separate ray source and detector, the two sets of scan imaging systems are juxtaposed on a same rotary mechanism, and a predetermined interval is provided between imaging planes of the two sets of scan imaging systems. The present disclosure ensures the two sets of imaging optical paths do not interfere with each other, therefore effectively avoiding the problem of scattering mutual interference between the dual sources of the dual-source CT scanning system in the prior art.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2015-12-17

A quick vehicle check system comprises a radiation source which produces a first X ray with a first dose and a second X ray with a second dose, wherein the first dose is smaller than the second dose, and the first X ray is used for checking a first part of a checked vehicle and the second X ray is used for checking a second part of the checked vehicle; a first sensor for detecting a set position of the checked vehicle; a second sensor for detecting a passing distance of the checked vehicle; and a control unit coupled with the first sensor and the second sensor, which receives the set position of the checked vehicle from the first sensor and receives the passing distance of the checked vehicle from the second sensor.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-12-18

The disclosure provides a method for measuring X-ray energy of an accelerator in an inspection system. the method comprises: building a database comprising correspondence between half-value layer (HVL) and energy under a predetermined condition; measuring HVL for X-rays of the accelerator in the inspection system on line under the same predetermined condition; and comparing the measured HVL with the HVLs in the database comprising correspondence between HVL and energy to determine the X-ray energy of the accelerator. The method is applicable to a large-scale container/vehicle inspection system for measurement of X-ray energy/HVL of the accelerator so as to acquire source state of the inspection system in real time.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2013-10-07

A method and system for detecting special nuclear materials are disclosed. Said method and system detect the special nuclear materials by making use of the photofission characteristic and thermal neutron induced fission characteristic thereof. In one preferred embodiment, the high density and/or high atomic number region in the object to be detected is also detected first as a suspicious region.


In particular, the present invention discloses a conjugate of polyethylene glycol and angiostatin fragment K1-3, wherein the conjugate exhibits prolonged in vivo half-life and enhanced biological activity as compared to unmodified angiostatin fragment K1-3, and wherein the conjugate is formed by coupling one angiostatin fragment K1-3 with one polyethylene glycol molecule at the N-terminal -amino group of the angiostatin fragment K1-3, and said angiostatin fragment Kl-3 is the K1-3 fragment of plasminogen, or its biologically active fragment, derivative, isomer or the combination thereof.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2016-06-22

The disclosure provides a method for measuring X-ray energy of an accelerator in an inspection system, the method comprises: building a database comprising correspondence between half-value layer (HVL) and energy under a predetermined condition; measuring HVL for X-rays of the accelerator in the inspection system on line under the same predetermined condition; and comparing the measured HVL with the HVLs in the database comprising correspondence between HVL and energy to determine the X-ray energy of the accelerator. The method is applicable to a large-scale container/vehicle inspection system for measurement of X-ray energy / HVL of the accelerator so as to acquire source state of the inspection system in real time.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-10-22

A ray emission device and an imaging system with the ray emission device are disclosed. The ray emission device comprises: a cylinder; a ray source disposed in the cylinder for emitting a ray; and a collimator disposed in the cylinder. The collimator enables the ray emitted by the ray source to form sectorial ray beams at a plurality of positions in an axial direction of the cylinder. The cylinder has a pencil beam forming part arranged over an axial length of the cylinder corresponding to the plurality of positions. The sectorial ray beams form pencil beams through the pencil beam forming part when the cylinder rotates around a rotation axis.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-11-13

The present disclosure provides method and apparatus for marking a target in a 3D image. The method include steps of: acquiring Computed Tomography (CT) image data of a scene; rendering a 3D image of the scene using ray casting based on the CT image data; removing a transparent region from the 3D image based on a fixed 2D transfer function; and marking the target in the 3D image.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-08-14

A radiation protection device is disclosed in the embodiment of the present invention. The radiation protection device is used for a system which is configured to perform safety inspection of a cargo or a vehicle by a ray. The radiation protection device comprising: at least one container, and a radiation protection part disposed within the container. The radiation protection material may comprise at least one of concrete, sandstone, and water, or the radiation protection part may comprise a steel-lead protection wall or a concrete protection wall. With the radiation protection device according to the embodiment of the present invention, after the container is transported to the site, it can be directly put in place to be capable of shielding rays without needing operation or with only simple operation. The amount of on-site work, construction time, and construction cost are low.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-11-18

The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-08-04

A millimeter wave three dimensional holographic scan imaging apparatus and a method for inspecting an object to be inspected using the same are disclosed. The apparatus includes a millimeter wave transceiver module with a millimeter wave transceiver antenna array for transmitting and receiving a millimeter wave signal. The apparatus also includes a guide rail device, to which the millimeter wave transceiver module is connected in slidable form. The millimeter wave transceiver module is moveable along the guide rail device to perform a plane scan on an object to be inspected. A data processing device generates a millimeter wave holographic image from the plane scan.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-05-22

There is provided a waveguide horn array, a method for forming the waveguide horn array, and an antenna system. The array includes a rectangular metal plate which is processed to have a cross section comprised of a plurality of rectangular holes arranged in the length direction of the rectangular metal plate, the lower part of each hole being formed as a rectangular waveguide, and the upper part of each hole being formed as a horn; and a groove extending in the direction along which the plurality of holes are arranged and having a predetermined depth, which is formed at two sides of the holes on the top surface of the rectangular metal plate. According to the embodiments, it is possible to maintain the good properties of the antenna in terms of bandwidth and directivity, while enhancing the isolation between the transmitting antenna and the receiving antenna in the system.


Patent
Protgen Ltd. and Tsinghua University | Date: 2013-03-04

The present invention relates to the diagnosis and treatment of cancer, and specifically to a method of diagnosing the presence, status or metastasis of cancer by detecting plasma Hsp90 having the amino acid sequence of SEQ ID NO:1 as a tumor marker. In addition, the present invention also relates to a method for the treatment of cancer and metastasis.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-11-04

CT imaging systems and methods thereof are disclosed. A common CT scanning is performed (S41) on an object to obtain a common CT imaging. An area of interest is determined (S43) from the image. A CT scanning is performed (S44) on the area of interest under a plurality of energy windows by a photon counter detector. A high resolution image of the area of interest is reconstructed (S46). The discrimination of energy spectrum is higher and the result so obtained is more stable by using a photon counter detector to collect photon count projection data of a plurality of energy windows and thus it may be decomposed into a plurality of basis functions.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-08-27

The present disclosure provides a low-angle self-swinging type computed tomography (CT) apparatus, which is provided with an X-ray accelerator and a plurality of rows of detectors and is configured to include a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an objected to be inspected passes through the slip ring, a three dimension CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-02-13

The present invention relates to a method and system for automatically identifying various information of a train. The method comprises using sensors to collect wheelbase information, processing the information by signal data processing devices, thereby providing information of a train, namely: arranging a plurality of sensors along the rail in the incoming direction of the train, dividing the sensors into at least three groups, each group comprising at least two sensors; analyzing and processing the signal data stream obtained from the sensors and collected when a train vehicle passes by, thereby acquiring the speed and wheelbase of the train, and further acquiring the train segmentation information; determining the vehicle type; acquiring hook locating information; determining the train arrival; determining the train departure; acquiring vehicle number. The present invention further comprises a system for carrying out the information method for automatically identifying information of a train. The present invention can provide a plurality of types of train information with high accuracy, and is easy to be carried out.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-02-26

The present invention discloses a boron-coated neutron detector, comprising a cathode tube with a plurality of passages formed therein along its longitudinal direction, the inner wall of each passage being coated with boron material; an electrode wire serving as an anode and arranged longitudinally in each of the passages, the electrode wire adapted to be applied with high voltage; and an insulating end plate to which each end of the cathode tube is fixed, the electrode wire being fixed to the cathode tube via the insulating end plate. Preferably, the cathode tube is formed by jointing a plurality of boron-coated substrates. By arranging in the cathode tube a plurality of passages coated with boron material on their inner walls, the boron-coated neutron detector increases the detection efficiency of the neutron detector, which may reach or even exceed the detection efficiency of the ^(3)He neutron detector of the same size, and the cost thereof is much cheaper than the ^(3)He neutron detector.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-07-01

The present invention may perform fluoroscopic imaging simultaneously on the subjects in at least two channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures. The X-ray fluoroscopic imaging system according to the present invention may be designed in specific forms of a stationary type, an assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.


Disclosed are a retrieving system and a retrieving method based on content of fluoroscopic images, the retrieving system comprising: a pre-classifying module, configured to pre-classify fluoroscopic images; an image content feature extracting module, configured to perform feature extraction for contents of the fluoroscopic images; an image representing module, configured to construct an image representation vector; a retrieving module, configured to construct a result of preliminary candidates; a diversified filtering module, configured to filter the result of preliminary candidates, select an image subset capable of covering a plurality of article categories, and thereby construct a diversified retrieval result; a correlation feedback regulating module, configured to receive information feedback on the retrieval result from a user, and update the retrieval model; and an interacting module, configured to display the retrieval result, and collect feedback on users satisfaction of the retrieval result.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-12-23

The disclosure provides a whole-course visualization system for logistics articles, including: an information collecting subsystem, including a plurality of information collecting units, which are respectively deployed at different sites along a logistics route, and configured to collect ID information of a parcel and acquire image information of an article in the parcel; and an information center processing subsystem, configured to store and manage data of the ID information and image information collected by and sent from the information collecting units, and send the stored data to the information collecting units according to requests from information collecting units; wherein the information collecting units compare data sent from the information center processing subsystem with the ID information and image information collected by information collecting units, and determine whether the collected ID information and image information are consistent with the data sent from information center processing subsystem.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-07-02

The present invention discloses a three-dimensional data processing and recognizing method. The method comprises following steps of: scanning and re-constructing objects to be detected so as to obtain three-dimensional data for recognition of the objects to be detected; and extracting data matching to features from the three-dimensional data, so that the extracted data constitute interested target in order to display and recognize the object to be detected. The present invention also discloses a quick method to recognize the object to be detected such as the shapes of cuboid, cylinder, and cutting tool, and so on.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-09-30

A vehicle inspection method and system are disclosed. In one aspect, the method includes acquiring a transmission image of an inspected vehicle. The method further includes acquiring a transmission image template of a vehicle model corresponding to the model of the inspected vehicle from a database. The method further includes performing registration on the transmission image of the inspected vehicle and the transmission image template. The method further includes determining a difference between a transmission image after the registration and a transmission image template after the registration, to obtain a difference area of the transmission image of the vehicle relative to the transmission image template. The method further includes processing the difference area to determine whether the vehicle carries a suspicious object or not. In some embodiments, this solution can avoid the problems of a detection loophole and a poor effect of manually determining an image in a conventional manner, and is important to assist the security inspection for small vehicles.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-12-19

The invention presents a backscattering scintillation detector. The scintillation detector includes a scintillation crystal detector; a X-ray sensitizing screen, which is disposed forward the scintillation crystal detector and where a backscattered X-ray from an object to be detected is processed and then at least part of the processed X-ray is incident to scintillation crystal detector; and photoelectric multiplier, which is disposed backward the scintillation crystal detector and is configured to collect a light signal from scintillation crystal detector and convert it to an electrical signal. Through the above preferable embodiment, a X-ray sensitizing screen, a scintillation crystal detector, and light guiding and wave-drifting technologies are combined together to obtain a novel scintillation detector, which can improve detection of X-ray, transmission of light signal and conversion of light signal to electrical signal.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-12-19

A CT system and method thereof are discloses. The system includes: a conveyor mechanism; a first scanning stage configured to scan the object and generate a first digital signal; a second scanning stage spaced from the first scanning stage at a preset distance in a direction of the objects movement; a processing device configured to reconstruct a CT image of the object at a first image quality based on the first digital signal, and analyze the CT image; and a control device configured to adjust a scanning parameter of the second scanning stage based on an analysis result of the processing device to cause the second scanning stage to output a second digital signal. The processing device reconstructs a CT image of the object at a second image quality higher than the first image quality at least based on the second digital signal. The system takes full advantage of the distributed ray sources which replace the normal slip ring technology.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-12-23

The present invention may perform fluoroscopic imaging simultaneously on the subjects in at least two channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures. The X-ray fluoroscopic imaging system according to the present invention may be designed in specific forms of a stationary type, an assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-12-19

Multi-spectral static CT apparatuses are disclosed. The apparatus includes a ray source in a form of multiple distributed spots, multiple columns of detectors, a data acquisition device, an article carrying and control device, and a multi-spectral projection data processing device. An object of the present disclosure is to combine static CT scanning technology with multi-spectral analysis technology. It has an advantage of a static CT system, such as high scanning speed, simple mechanic structure, and/or cost reduction due to omission of slip ring. It also can perform identification of material in an article, and can be widely applied in occasions such as safety inspection, and smuggling suppression at customs.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2015-07-15

The present invention provides a method and apparatus for processing signals of a semiconductor detector, including: acquiring a relationship of a time difference between anode and cathode signals of the semiconductor detector with an anode signal amplitude; obtaining an optimal data screening interval according to the relationship of the time difference between anode and cathode signals of the semiconductor detector with the anode signal amplitude, wherein the optimal data screening interval is an interval where the time difference between the anode and cathode signals is greater than 50 ns; and screening and processing the collected data according to the optimal data screening interval when the semiconductor detector collects data. The present invention better overcomes the inherent crystal defects of the detector, reduces the effect of background noise, increases the energy resolution of the cadmium zinc telluride detector under room temperature, and improves the peak-to-compton ratio.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-03-02

The present disclosure provides a low-angle self-swinging type computed tomography (CT) apparatus, which is provided with an X-ray accelerator and a plurality of rows of detectors and is configured to include a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an objected to be inspected passes through the slip ring, a three dimension CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-12-18

Embodiments of the present invention disclose a pesticide residue detection method, comprising the steps: (a) irradiating a sample to be detected by an exciting light and collecting a Raman scattered light from the sample; (b) acquiring a Raman spectrum of the sample from the collected Raman scattered light; and (c) comparing the Raman spectrum with reference Raman spectra for known pesticides in a reference Raman library to determine composition and concentration of the pesticide residue in the sample. The method may achieve effective, convenient and accurate inspection of the pesticide residue in foods, in particular suitable for rapid detection.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-12-19

Embodiments of the present invention provide gem identification method and apparatus. The method comprises the steps: (a) placing a sample to be detected over a light transmission hole formed on a carrying surface of an object table and emitting, by an optical probe disposed below the carrying surface, an exciting light onto the sample through the light transmission hole and then collecting a Raman scattered light from the sample by the optical probe; (b) acquiring a Raman spectrogram of the sample from the collected Raman scattered light from the sample; and (c) comparing the Raman spectrogram with a reference Raman spectrogram library for gems to identify the sample. The method and apparatus may achieve effective, convenient and accurate inspections of the gems.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-12-19

Embodiments of the present invention disclose a nuclide identification method, a nuclide identification system, and a photoneutron emitter. The photoneutron emitter comprises: a pulsed electron accelerator configured for emitting electrons; and a photoneutron converting target configured to receive the electrons emitted by the pulsed electron accelerator and convert the electrons into photoneutrons. The photoneutron converting target has a volume of about 100 to about 8000 cm^(3), of about 100 to about 2500 cm^(3), or of about 785 cm^(3). These embodiments of the present invention can improve an accuracy of identification of a nuclide, and provide a practical photoneutron emitter, method and system for identifying a nuclide. Especially, these embodiments of the present invention can improve an accuracy of identification of a fissile nuclide such as ^(233)U, ^(235)U, and ^(239)Pu, and provide a practical photoneutron emitter, method and system for identifying a fissile nuclide such as ^(233)U, ^(235)U, and ^(239)Pu.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-12-23

The X-ray fluoroscopic imaging system of the present invention comprises: an inspection passage; an electron accelerator; a shielding collimator apparatus comprising a shielding structure, and a first collimator for extracting a low energy planar sector X-ray beam and a second collimator for extracting a high energy planar sector X-ray beam which are disposed within the shielding structure; a low energy detector array for receiving the X-ray beam from the first collimator; and a high energy detector array for receiving the X-ray beam from the second collimator. The first collimator, the low energy detector array and the target point bombarded by the electron beam are located in a first plane; and the second collimator, the high energy detector array and the target point bombarded by the electron beam are located in a second plane.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-12-23

The present invention provides an X-ray generating apparatus and an X-ray fluoroscopy imaging system comprising the same. The X-ray generating apparatus comprises: an electron accelerator including an electron acceleration unit, an electron emission unit, and a target; a shielding and collimating device, including a shielding structure and a collimator arranged in the shielding structure, wherein the target is surrounded by the shielding structure, the collimator is arranged in a direction passing through the target point and forming an angle from 30 degrees to 150 degrees with the electron beam shooting the target.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-07-31

The present disclosure provides a system and method for inspecting an aircraft. A ray source and a detector locate at above and below of a fuselage of an aircraft, respectively. The ray source emits a beam of rays, which pass through the aircraft to be detected. The detector receives and converts the beam of rays that pass through the aircraft to an output signal, and generates a vertical transmission image in real time.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-07-27

The present disclosure relates to an X-ray imaging system and imaging method. The X-ray imaging system according to the present disclosure comprises a distributed X-ray source arrangement, a fixed grating module, an X-ray detecting device and a computer workstation. An object to be detected is disposed between the distributed X-ray source arrangement and the fixed grating module. The computer workstation performs control such that: the X-ray sources of the distributed incoherent X-ray source arrangement sequentially generate X-rays to emit X-rays to an object to be detected; for each exposure, the X-ray detecting device receives the X-rays, wherein after a series of stepping exposures of the distributed incoherent X-ray source arrangement and corresponding data acquisitions, at each pixel of the X-ray detecting device, X-ray intensities are represented as an intensity curve; the intensity curve is compared to an intensity curve in the absence of the object to be detected, and a pixel value at each pixel is obtained from a variation of the intensity curves; and image information of the object to be detected is obtained according to the obtained pixel values.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2013-03-28

The present invention provides a boron-containing gas film fast-neutron detector. The fast-neutron detector comprises a package piece having a hollow cavity; a plastic scintillator array provided in the cavity and comprising a plurality of plastic scintillator units, a gap existing between adjacent plastic scintillator units; and a boron-containing gas filled into and gas-tightly sealed in the hollow cavity, the boron-containing gas forming a boron-containing gas film in the gap between the adjacent plastic scintillator units. The fast-neutron detector of the present invention completely does not require use of scarce and expensive ^(3)He gas, nor needs a complicated boron film coating process, improves credibility of signal coincidence, and is adapted for measurement of environment background neutrons and extensively adapted for detection of radioactive substance at sites such as customs ports, harbors and the like.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-05-07

The present invention discloses a millimeter-wave inspection apparatus. The millimeter-wave inspection apparatus comprises: optics devices (30, 40, 50), configured to receive millimeter-wave energy radiated from an object to be inspected and focus the received millimeter-wave energy; a radiometer receiving device (80) configured to receive the focused millimeter-wave energy and transform the millimeter-wave energy into electrical signal; and an imaging device configured to generate a temperature image of the object to be inspected in accordance with the electrical signal, wherein the millimeter-wave inspection apparatus further comprises a radiometer temperature calibration device (110), which comprises: a normal temperature calibration mechanism, having a calibration temperature equal to the current environment temperature, to calibrate the initial value of the radiometer (83); and a high temperature calibration mechanism, having a calibration temperature higher than the current environment temperature, to cooperate with the normal temperature calibration mechanism for calibrating the gain of the radiometer (83).


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2012-04-13

A boron-coated neutron detector, comprising a cathode tube with a plurality of passages formed therein along its longitudinal direction, the inner wall of each passage being coated with boron material; an electrode wire serving as an anode and arranged longitudinally in each of the passages, the electrode wire adapted to be applied with high voltage; and an insulating end plate to which each end of the cathode tube is fixed, the electrode wire being fixed to the cathode tube via the insulating end plate. Preferably, the cathode tube is formed by jointing a plurality of boron-coated substrates. The boron-coated neutron detector increases the detection efficiency of the neutron detector, which may reach or even exceed the detection efficiency of the ^(3)He neutron detector of the same size, and the cost thereof is much cheaper than the ^(3)He neutron detector.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-01-06

The present invention provides an X-ray backscattering safety inspection system, comprising: an X-ray source comprising a plurality of target spots each individually controllable to emit X-rays; collimators configured to be respectively passed through the X-ray emitted from the plurality of target spots and output N pencil-shaped X-ray beams, and the N pencil-shaped X-ray beams are irradiated onto N locations of an object to be inspected; and N detectors configured to respectively receive scattering signals from the corresponding locations of the object to be inspected, in which N is a positive integer that is great than or equal to 2. The system may achieve double scannings in one scanning operation, which not only increases scanning speed but also enhances backscattering signal for imaging.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-06-29

The present disclosure provides a radiation image inspection system based on B/S architecture. The system comprises: at least one client terminal, configured to initiate an image operation request to a Web server, and display an image operation result on a browser of the client terminal upon receiving a response from the Web server; an image processing assembly, configured to query, based on the image operation request from the client terminal and forwarded by the Web server, an image which the client terminal desires to process, perform an operation on an image as requested by the client terminal, convert the resulted image into an image in a designated format and quality and return the converted image to the browser of the client terminal via the Web server for displaying; and the Web server, configured to receive the image operation request from the client terminal, forward the image operation request to the image processing assembly, and return the image operation result from the image processing assembly to the client terminal.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2015-06-25

The present invention provides a CT image calibration method and device and a CT system. The method includes: arranging a fixed calibration element at the outside of a channel area and within the maximal reconstruction area of a CT scanning device, and storing the theoretical value of the fixed calibration element; collecting the projection data of the fixed calibration element to obtain the actual reconstructed image of the fixed calibration element; and comparing the actual reconstructed image with the stored corresponding theoretical value, to establish a mapping function for correcting the actual reconstructed image into the theoretical value. By adopting the present invention, the calibration quality can be effectively improved, the image calibration effect is enhanced, the reliability of the CT scanning device is improved and the maintenance cost is saved, thus the practical application value is very high.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-09-25

The present disclosure provides methods and devices for locating a plurality of interested objects in CT imaging. Location of the interested objects in the three-dimensional space can be determined by using three projection images that are substantially perpendicular to each other. The method can rapidly locate interested objects in a CT image without pre-reconstruction of the CT image even if there are a plurality of interested objects in the field of view. The algorithm does not involve interactive steps. The method is rapid and effective, and thus applicable to industrial applications.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-09-18

A two dimensional array distributed x-ray apparatus of this disclosure comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged in one plane in a two dimensional array on the wall of the vacuum box; an anode having targets corresponding to the plurality electron transmitting unit arranged in parallel with the plane of the plurality of electron transmitting units in the vacuum box; a power supply and control system having a high voltage power supply connected to the anode, a filament power supply connected to each of the plurality of the electron transmitting units, a grid-controlled apparatus connected to each of the plurality of electron transmitting units, a control system for controlling each power supply; wherein the anode comprises: an anode plate made of metal and parallel to the upper surface of the electron transmitting unit; a plurality of targets arranged on the anode plate and disposed corresponding to the positions of the electron transmitting unit, the bottom surface of the target is connected to the anode plate and the upper surface of the target has a predetermined angle with the anode plate.


Patent
NUCTECH COMPANY Ltd and Tsinghua University | Date: 2014-09-18

The present application provides a curved surface array distributed x-ray apparatus, characterized in that, it comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged on the wall of the vacuum box in multiple rows along the direction of the axis of the curved surface in the curved surface facing the axis; an anode made of metal and arranged in the axis in the vacuum box which comprises an anode pipe and an anode target surface; a power supply and control system having a high voltage power supply connected to the anode, a filament power supply connected to each of the plurality of the electron transmitting units, a grid-controlled apparatus connected to each of the plurality of electron transmitting units, a control system for controlling each power supply.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-09-18

A x-ray apparatus of the present application comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged in a linear array and installed on the wall at one end within the vacuum box, each electron transmitting unit is independent to each other; the electron transmitting unit having: a heating filament; a cathode connected to the heating filament; a grid arranged above the cathode opposing the cathode; anode made of metal and installed at the other end of the vacuum box, and in the direction of length, the anode is parallel to the plane of the grid of the electron transmitting unit, and in the direction of width, the anode has a predetermined angle with respect to the plane of the grid of the electron transmitting unit.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-09-18

The present application provides an external thermionic cathode distributed x-ray apparatus, comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged in a linear array and installed on the side wall of the vacuum box, each electron transmitting unit is independent to each other; an anode installed in the center inside the vacuum box, and in the direction of length, the anode is parallel to the orientation of the electron transmitting unit, and in the direction of width, the anode has a predetermined angle with respect to the plane of the electron transmitting unit; and a power supply and control system having a high voltage power supply, a focusing power supply; a transmitting control means and a control system; the electron transmitting unit having: a heating filament; a cathode connected to the heating filament; an insulated support enclosing the heating filament and the cathode; a focusing electrode, arranged at the upper end of the insulated support by way of locating above the cathode; and a connecting fastener arranged above the focusing electrode and connected to the wall of the vacuum box; wherein, the filament lead is connected to the transmitting control means through the insulated support.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-07-02

A standing wave electron linear accelerating apparatus and a method thereof are disclosed. The apparatus comprises an electron gun configured to generate electron beams; a pulse power source configured to provide a primary pulse power signal; a power divider coupled downstream from the pulse power source and configured to divide the primary pulse power signal outputted from the pulse power source into a first pulse power signal and a second pulse power signal; a first accelerating tube configured to accelerating the electron beams with the first pulse power signal; a second accelerating tube configured to accelerate the electron beams with the second pulse power signal; a phase shifter configured to continuously adjust a phase difference between the first pulse power signal and the second pulse power signal so as to generate accelerated electron beams with continuously adjustable energy at output of the second accelerating tube.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-02-24

The present invention discloses a vehicle dragging system, comprising: a first dragging means (111) and a second dragging means (112), which are sequentially arranged along a vehicle dragging direction (E), wherein in the vehicle dragging direction (E), the first dragging means (111) is arranged at the upstream of the second dragging means (112), and a separating section (113) is arranged between the first dragging means (111) and the second dragging means (112), so that the first dragging means (111) is separated from the second dragging means (112) by a preset distance in the vehicle dragging direction(E), wherein the first dragging means (111) comprises a first supporting plate (1111), a first elongated traction element (114) and a first pushing element (1141) connected with the first elongated traction element (114), and the first pushing element (1141) is adapted to move around the first supporting plate (1111) for pushing wheels to move along the first supporting plate (1111), in order to drive a vehicle to advance; the second dragging means (112) comprises a second supporting plate (1121), a second elongated traction element (114) and a second pushing element (1141) connected with the second elongated traction element (114), and the second pushing element (1141) is adapted to move along the second supporting plate (1121) for pushing wheels to move along the second supporting plate (1121), in order to drive the vehicle to advance.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-06-24

The present disclosure discloses a detector device comprising a plurality of detector assemblies. Each detector assembly comprises at least one detection crystal units having a first energy response and those having a second energy response, which are both arranged along a first direction at intervals, each detection crystal unit having a first/second energy response including at least one detection crystals having a first/second energy response arranged along a second direction. The at least one detection crystal units having a first energy response and the at least one detection crystal units having a second energy response are, at least partially, alternatively arranged along the first direction when viewed from an incidence direction of the X-ray. The present disclosure also discloses a dual energy CT system having the detector device and a CT detection method using this system.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2015-09-01

A vehicle-mounted inspection system comprises: a chassis; a rotation mechanism disposed on the chassis; a first ray emission device connected to the rotation mechanism and configured to emit a ray; a first detection device connected to the rotation mechanism and configured to receive the ray emitted by the first ray emission device; and a second ray emission device connected to the rotation mechanism and configured to emit a ray. The rotation mechanism is configured to rotate the first ray emission device, the first detection device and the second ray emission device substantially around an upright axis between a retracted position and an operating position.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-04-07

There is provided a wideband patch antenna and an antenna array. The antenna includes a dielectric substrate of a rectangle shape, a radiation patch formed on a top surface of the dielectric substrate, a coupling patch formed on the top surface of the dielectric substrate and extending from a side of the dielectric substrate to a position from the radiation patch by a distance, a metal support arranged on the lower surface of the dielectric substrate and extending from the edge of the lower surface of the dielectric substrate downward to the ground, a layer of air having a predetermined thickness being formed between the lower surface of the dielectric substrate and the ground. According to the embodiments, it is possible to improve the directivity of the wideband microstrip antenna while maintaining its small size.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-12-23

The present invention discloses a vehicle inspection system, comprising: a radiation source; an inspection passage enabling a vehicle to pass; a dragging system comprising a first dragging means and a second dragging means, which are sequentially arranged along a vehicle dragging direction; in the vehicle dragging direction, the first dragging means is arranged at the upstream of the second dragging means, and a separating section is arranged between the first dragging means and the second dragging means, so that the first dragging means is separated from the second dragging means by a preset distance in the vehicle dragging direction; and the first and second dragging means both include a supporting plate, an elongated traction element and a pushing element connected with the elongated traction element, the elongated traction elements of the first and second dragging means are continuous and integrated, thus the elongated traction elements and pushing elements extends on the separating section; the supporting plates of the first and second dragging means are separated and two pieces type, and no supporting plate is provided on the separating section.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2014-12-23

The present invention discloses a vehicle inspection system, comprising: an inspection passage; a vehicle dragging system arranged in the inspection passage, wherein the vehicle dragging system comprises a first dragging means and a second dragging means, which are sequentially arranged along a vehicle dragging direction, and in the vehicle dragging direction, the first dragging means is arranged at the upstream of the second dragging means, and a separating section is arranged between the first dragging means and the second dragging means, so that the first dragging means and the second dragging means are separated by a preset distance in the vehicle dragging direction; and a radiographic inspection system, wherein at least a part of paths of the beams of the radiographic inspection system passes through the separating section between the first dragging means and the second dragging means.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-12-23

Disclosed are object detection method, display methods and apparatuses. The method includes obtaining slice data of inspected luggage in the CT system; generating 3D volume data of objects in the luggage from the slice data; for each object, determining a semantic description including at least a quantifier description of the object based on the 3D volume data; and upon reception of a user selection of an object, presenting the semantic description of the selected object while displaying a 3D image of the object. The above solutions can create a 3D model for objects in the inspected luggage in a relatively accurate manner, and thus provide better basis for subsequent shape feature extraction and security inspection, and reduce omission factor.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-05-11

The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2016-07-22

Disclosed is a method and device for estimating weight of an object to be inspected in an inspection system. An effective atomic number and a high-energy gray value of the dual-energy corresponding to each pixel of the object to be inspected are obtained by a dual-energy radiation scanning. A mass-thickness value for a corresponding pixel is obtained from a pre-created mass-thickness attenuation curve by utilizing the effective atomic numbers and the high-energy gray value of the dual-energy for respective pixels. Weight information for at least a part of the object to be inspected is calculated by multiplying the mass-thickness value by the area of the pixel. Such a method may accurately calculate the weight of the object to be inspected and save the cost for a conventional weighing hardware.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-05-08

The present invention discloses a millimeter-wave inspection apparatus. The millimeter-wave inspection apparatus comprises: optics devices (30, 40, 50), configured to receive millimeter-wave energy radiated from an object to be inspected and focus the received millimeter-wave energy; a radiometer receiving device(80) configured to receive the focused millimeter-wave energy and transform the millimeter-wave energy into electrical signal; and an imaging device configured to generate a temperature image of the object to be inspected based on the electrical signal. Compared with the prior art, the millimeter-wave inspection apparatus of the present invention has a simple and compact structure; it would not be harmful to the human health by employing the passive millimeter-wave human body security inspection technology. With the above configuration, the contraband items to be concealed within the human clothing can be efficiently and effectively detected.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-07-02

Disclosed are object detection method, display methods and apparatuses. The method includes obtaining slice data of inspected luggage in the CT system; generating 3D volume data of objects in the luggage from the slice data; for each object, determining a semantic description including at least a quantifier description of the object based on the 3D volume data; and upon reception of a user selection of an object, presenting the semantic description of the selected object while displaying a 3D image of the object. The above solutions can create a 3D model for objects in the inspected luggage in a relatively accurate manner, and thus provide better basis for subsequent shape feature extraction and security inspection, and reduce omission factor.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-05-13

The present invention discloses a gantry configuration for a combined mobile radiation inspection system comprising a first arm frame, a second arm frame and a third arm frame. The first, second and third arm frames define a scanning channel to allow an inspected object to pass therethrough. The gantry configuration for the combined mobile radiation inspection system further comprises a position sensing device configured to detect a position error between the first arm frame and the second arm frame; and a controller configured to control a moving speed of at least one of the first arm frame and the second arm frame based on the detected position error, so that the position error between the first arm frame and the second arm frame is equal to zero. Compared with the prior art, the present invention is advantageous at least in that an automatic deviation correction device is provided on the gantry arm frame, and thus the position error between both side arm frames can be automatically controlled to zero, so that the gantry arm frame can be effectively prevented from being subjected to a force and deforming, and the radiation detector can receive the full ray, thereby improving the imaging quality.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-01-20

The present invention provides a method and apparatus for processing signals of a semiconductor detector, including: acquiring a relationship of a time difference between anode and cathode signals of the semiconductor detector with an anode signal amplitude; obtaining an optimal data screening interval according to the relationship of the time difference between anode and cathode signals of the semiconductor detector with the anode signal amplitude, wherein the optimal data screening interval is an interval where the time difference between the anode and cathode signals is greater than 50 ns; and screening and processing the collected data according to the optimal data screening interval when the semiconductor detector collects data. The present invention better overcomes the inherent crystal defects of the detector, reduces the effect of background noise, increases the energy resolution of the cadmium zinc telluride detector under room temperature, and improves the peak-to-compton ratio.


Disclosed are a retrieving system and a retrieving method based on content of fluoroscopic images, the retrieving system (100) comprising: a pre-classifying module (101), configured to pre-classify fluoroscopic images; an image content feature extracting module (102), configured to perform feature extraction for contents of the fluoroscopic images; an image representing module (103), configured to construct an image representation vector; a retrieving module (104), configured to construct a result of preliminary candidates; a diversified filtering module (105), configured to filter the result of preliminary candidates, select an image subset capable of covering a plurality of article categories, and thereby construct a diversified retrieval result; a correlation feedback regulating module (106), configured to receive information feedback on the retrieval result from a user, and update the retrieval model; and an interacting module (107), configured to display the retrieval result, and collect feedback on users satisfaction of the retrieval result.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2013-05-08

The present invention discloses an article inspection device, comprising: a x-ray machine, a collimation unit, a transmission detector array and at least one scattering detector array. Each of the at least one scattering detector array comprising a plurality of same scattering detector modules arranged in a matrix of i-rows and j-columns. A transmission cross section of the article transmitted by the x-rays is divided into a plurality of same sub-regions arranged in a matrix of i-rows and j-columns. The plurality of scattering detector modules arranged in i-rows and j-columns correspond to the plurality of sub-regions arranged in i-rows and j-columns one by one for detecting pair production effect annihilation photons and Compton-effect scattering photons from the respective sub-regions. Obtaining atomic numbers of the respective sub-regions based on a ratio of the pair production effect annihilation photon count to the Compton-effect scattering photon count, so as to form a three-dimensional image of the article. In addition, the present invention further discloses an article inspection method.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2016-06-08

A ray detection system for an X/Gamma ray container/vehicle inspection device, comprising detector modules, is provided. The detector modules are arranged on a detector arm (34), and each detector module comprises one or more detector units (35) arranged in a scattered configuration, wherein each the detector unit in the detector module is installed so as to align with a beam center of a ray source (31), thereby significantly reducing the dimension of a detector frame while improving the imaging quality.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-06-15

The present disclosure discloses an alignment system and an alignment method for a container or vehicle inspection system, and an inspection system. The inspection system comprises comprising an ray source, a collimator, a detector arm and a detector module mounted on a detector arm, the ray source, the collimator and the detector module are arranged to form an inspection passage, a ray beam emitted from the ray source passes through collimator and irradiates onto an inspected object, and an attenuated ray beam is collected by the detector module so as to complete inspection. The alignment system comprises a measuring module arranged to receive the ray beam emitted from the collimator and to measure the ray beam so as to determine positions and orientations of the ray source and the collimator. With the alignment method, alignment between a center point of the ray source, a central line of a detector tip and a central line of the collimator may be more accurately measured.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-07-30

Provided are image processing method and apparatus. The method includes selecting one of a plurality of images matched in structure as reference image, and select another of the images as subject image; for a subject pixel in the subject image, determining a pixel corresponding to the subject pixel in the reference image; calculating similarity values of at least part of pixels in the reference image with respect to the pixel corresponding to the subject pixel; establishing weight coefficients based on the similarity values, and weighted averaging the subject pixel in the subject image to obtain a processed pixel value. With the above solutions, it is possible to use structure information of a higher-quality image in processing another image, and thus improve quality of the other image.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-07-02

A detection device for a CT system comprises a low-energy detector assembly; and a high-energy detector assembly disposed under the low-energy detector assembly. The high-energy detector assembly comprises: a plurality of rows of high-energy detectors arranged at predetermined intervals. With the detection device, detectors and data acquisition units are greatly reduced. A high-resolution three-dimensional CT image is acquired while high-accuracy hazardous article alarm is achieved. The cost of manufacture of the system is greatly decreased while high system performance is ensured.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-01-27

The disclosure provides a system and a method for customs in-transit supervision. The system comprises: a port clearance subsystem (20) configured to collect and process information of a supervised object at a port; a risk management subsystem (40) configured to determine an in-transit supervision scheme for the supervised object based on a risk level of the supervised object; an in-transit supervision apparatus (10) configured to supervise the supervised object in transit according to the in-transit supervision scheme; and a central supervision subsystem (30) configured to conduct information interaction with the port clearance subsystem, the risk management system and the in-transit supervision apparatus and transmit instructions for controlling the subsystems and the apparatus. By introducing comparison between origin port information and destination port information and a risk management mechanism, the system and the method according to the disclosure improves the specificity, efficiency and intensity of supervision.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-07-02

The present invention discloses a vehicular radiation inspection system comprising a mobile vehicle body, a detection arm, a radiation source and a detector. The vehicular radiation inspection system further comprises a following mechanism separated from the detection arm. The following mechanism contains radiation protection material, and the following mechanism follows the detection arm to move in a non-contact manner during inspection of the inspected object, so as to prevent radiation leakage. In the present invention, it does not need to infuse radiation protection material having a high density, such as lead, into the detection arm. Therefore, it can effectively decrease the weight of the detection arm, and it does not need to provide a balance counterweight on the mobile vehicle body on which the detection arm is carried, thereby effectively solving the problem that the vehicular radiation inspection system has an excessively large mass. Meanwhile, in the present invention, the moving process of the following mechanism is accurately controlled, so as to prevent the following mechanism from hitting the detection arm.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2013-07-02

The present invention discloses a gantry configuration for a combined mobile radiation inspection system comprising a first arm frame, a second arm frame and a third arm frame. The first, second and third arm frames define a scanning channel to allow an inspected object to pass therethrough. The gantry configuration for the combined mobile radiation inspection system further comprises a position sensing device configured to detect a position error between the first arm frame and the second arm frame; and a controller configured to control a moving speed of at least one of the first arm frame and the second arm frame based on the detected position error, so that the position error between the first arm frame and the second arm frame is equal to zero. Compared with the prior art, the present invention is advantageous at least in that an automatic deviation correction device is provided on the gantry arm frame, and thus the position error between both side arm frames can be automatically controlled to zero, so that the gantry arm frame can be effectively prevented from being subjected to a force and deforming, and the radiation detector can receive the full ray, thereby improving the imaging quality.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2016-11-02

Embodiments of the present invention provide gem identification method and apparatus. The method comprises the steps: (a) placing a sample to be detected over a light transmission hole formed on a carrying surface of an object table and emitting, by an optical probe disposed below the carrying surface, an exciting light onto the sample through the light transmission hole and then collecting a Raman scattered light from the sample by the optical probe; (b) acquiring a Raman spectrogram of the sample from the collected Raman scattered light from the sample; and (c) comparing the Raman spectrogram with a reference Raman spectrogram library for gems to identify the sample. The method and apparatus may achieve effective, convenient and accurate inspections of the gems.


Patent
Jiangsu Huadong Institute Of Li Ion Battery Coltd and Tsinghua University | Date: 2014-07-04

A method for making a separator in a lithium ion battery which is less susceptible to high temperature shrinkage provides a polyolefin porous membrane. An oxidant is applied to surface of the polyolefin porous membrane. The polyolefin porous membrane and oxidant are heated in a liquid medium. The liquid medium includes a silicon-oxygen organic compound including a methacryloxy group and at least two alkoxy groups respectively joined to a silicon atom. The silicon-oxygen organic compound is polymerized and chemically grafted to the polyolefin porous membrane to form a grafted polyolefin porous membrane. A condensation reaction then occurs between silicon-oxygen groups in the grafted polyolefin porous membrane in an acidic environment or alkaline environment.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-04-02

Disclosed are an installation case for a radiation device, an oil-cooling circulation system and an X-ray generator which belong to the technical field of X-ray generator. This disclosure aims to solve the technical problems existing in the conventional X-ray generator, that is, the conventional X-ray generator provides bad sealing, the weight of the case body of the conventional X-ray generator is heavy, and the leakage dose of the X-ray in the conventional X-ray generator is large. The installation case for a radiation device according to this disclosure comprising a case body and a collimator fixedly connected with the case body, the collimator being provided with a beam exit aperture and the case body being provided with a beam exit opening, the installation case for a radiation device further comprises a shielding device provided within the case body, the collimator and the shielding device are integrally formed, or the collimator and the shielding device are two separate parts and are fixedly connected with each other; each layer of the shielding device is provided with a ray exit aperture, and the ray exit aperture, the beam exit aperture and the beam exit opening are coaxial. The X-ray generator according to this disclosure comprises the oil-cooling circulation system according to this disclosure. The installation case for a radiation device according to the disclosure provides improved sealing and ray leakage-proof performance.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-01-28

The present invention provides a human body security inspection method and system. The method comprises: retrieving in real-time scanning row or column image data of a personal to be inspected; transmitting in real-time the image data to an algorithm processing module and processing these image data by the module; automatically recognizing a suspicious matter by a suspicious matter automatic target recognition technique, after retrieving an image data of an entire scanning image of the personal; any of the following three inspection modes is selected, so as to perform a further processing on basis of the recognition result of the suspicious matter, (1) in a manner of automatic target recognition technique, (2) in a combination manner of the automatic target recognition technique and a privacy protection image; and (3) a combination manner of the automatic target recognition technique, a privacy protection image and human intervention.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-07-02

Human body back-scattering inspection systems and methods are disclosed. In the invention, X-rays modulated by the flying-spot forming unit having spirally distributed flying-spots have a distribution having alternating peaks and valleys on the irradiated surface. In this way, scanning starting times can be precisely controlled to cause two devices to have scanning starting times that are different by a half of a cycle. That is, the beams outputted from one device are at maximum when the beams outputted from the other device are at minimum. In other words, even if the ray source of one device emits rays, it will not significantly affect imaging result of the other device. In such way, the two devices may emit rays and perform scanning at the same time, and thus the total scanning time is reduced.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-11-04

The cathode control multi-cathode distributed X-ray apparatus of this invention comprises: a vacuum box with the perimeter sealed and a high vacuum inside; a plurality of cathodes independent of each other and arranged and mounted at one end inside the vacuum box; a plurality of focal current limiters arranged corresponding one by one to the cathodes and mounted at a position near the cathodes inside the vacuum box, the focal current limiters being connected to one another; an anode made of metal and mounted at another end inside the vacuum box, being parallel to the focal current limiters in the length direction and forming a predetermined included angle with the focal current limiters in the width direction; a power supply and control system, having a cathode power supply, a focal current limiter power supply connected to the focal current limiters, an anode high voltage power supply, and a control apparatus; a pluggable high voltage connector, for connecting the anode to the cable of the anode high voltage power supply, and mounted at the side face of one end of the vacuum box near the anode; a plurality of pluggable cathode power supply connectors, for connecting the cathode to the cathode power supply, and mounted at the side face of one end of the vacuum box near the cathode.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-04-15

A two dimensional array distributed x-ray apparatus of this disclosure comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units (1) arranged in one plane in a two dimensional array on the wall of the vacuum box; an anode (2) having targets corresponding to the plurality electron transmitting unit arranged in parallel with the plane of the plurality of electron transmitting units in the vacuum box; a power supply and control system having a high voltage power supply connected to the anode, a filament power supply connected to each of the plurality of the electron transmitting units, a grid-controlled apparatus connected to each of the plurality of electron transmitting units, a control system for controlling each power supply; wherein the anode comprises: an anode plate made of metal and parallel to the upper surface of the electron transmitting unit; a plurality of targets arranged on the anode plate and disposed corresponding to the positions of the electron transmitting unit, the bottom surface of the target is connected to the anode plate and the upper surface of the target has a predetermined angle with the anode plate.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-08-06

The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-12-30

The present disclosure provides a radiation image inspection system based on B/S architecture. The system comprises: at least one client terminal, configured to initiate an image operation request to a Web server, and display an image operation result on a browser of the client terminal upon receiving a response from the Web server; an image processing assembly, configured to query, based on the image operation request from the client terminal and forwarded by the Web server, an image which the client terminal desires to process, perform an operation on an image as requested by the client terminal, convert the resulted image into an image in a designated format and quality and return the converted image to the browser of the client terminal via the Web server for displaying; and the Web server, configured to receive the image operation request from the client terminal, forward the image operation request to the image processing assembly, and return the image operation result from the image processing assembly to the client terminal.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-07-06

The present disclosure discloses a method and system for inspecting cargoes. The method comprises: acquiring a transmission image of the inspected cargoes; processing the transmission image to acquire an interested region; extracting features from the interested region, and determining cargo information of the inspected cargoes according to the extracted features; and providing a proposed treatment suggestion of the cargoes based on the determined cargo information and at least a part of information in a manifest.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-04-30

A ray emission device (30) and an imaging system (100) with the ray emission device are disclosed. The ray emission device comprises: a cylinder (31); a ray source disposed in the cylinder for emitting a ray; and a collimator disposed in the cylinder. The collimator enables the ray emitted by the ray source to form sectorial ray beams at a plurality of positions in an axial direction of the cylinder. The cylinder has a pencil beam forming part arranged over an axial length of the cylinder corresponding to the plurality of positions. The sectorial ray beams form pencil beams (102) through the pencil beam forming part when the cylinder rotates around a rotation axis. In the present invention, since there is not the scanning movement in the second dimensional direction, and there is only rotation of the rotary shield itself in one dimension, the problem that the moment of inertia of the rotary shield is to be overcome does not exist. In addition, the present invention ensures that an actual scanning line in the first dimensional direction is always consistent with a movement direction in the first dimensional direction and geometry deformation will not occur in the scan images in principle.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2014-12-19

A CT system and method thereof are discloses. The system includes: a fixed multi-plane multi-source X-ray generation device and a control system thereof that provide X-ray source used in luggage inspection; a single-energy, pseudo-dual-energy or spectral detector system and data transfer system that receive perspective data of X ray penetrating the luggage, and transfer the data to a computer for processing; a conveyor and a control system thereof that control a speed for moving the luggage forth and back, and perform tomogram scanning; and a host computer system that performs tomogram reconstruction and provides man-machine interaction. The system takes full advantage of characteristics, such as high speed and stability, brought by the distributed ray sources which replace the normal slip ring technology. The system also adopts the idea of inverse-geometry CT, and reduces detector area and cost by increasing the number of ray sources. With the reduction of detector area, cone-beam artifacts and cup-shape artifacts caused by scattering are also reduced, and influence of the oblique effect on registration of dual-energy data is suppressed.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-06-29

The present disclosure provides a dual-source security inspection CT scanning system and scanning method. The system includes two sets of scan imaging systems (6, 7), wherein each set of the scan imaging systems (6, 7) has its own separate ray source (6-1, 7-1) and detector (6-2, 7-2), the two sets of scan imaging systems (6, 7) are juxtaposed on a same rotary mechanism (2), and a predetermined interval is provided between imaging planes of the two sets of scan imaging systems (6, 7). The present disclosure ensures the two sets of imaging optical paths do not interfere with each other, therefore effectively avoiding the problem of scattering mutual interference between the dual sources of the dual-source CT scanning system in the prior art.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-03-04

The present disclosure relates to a self-prior information based X-ray dual-energy CT reconstruction method, which can utilize information inherent in data to provide a prior model, thereby obtaining a reconstructed image with a high quality. The X-ray dual-energy CT reconstruction method according to the present disclosure comprises: (a) rating an energy spectrum and establishing a dual-energy lookup table; (b) collecting high-energy data p_(H) and low-energy data p_(L) of a dual-energy CT imaging system using a detector of the dual-energy CT imaging system; (c) obtaining projection images R_(1) and R_(2) of scaled images r_(1) and r_(2) according to the obtained high-energy data p_(H) and low-energy data p_(L); (d) reconstructing the scaled image r_(2) using a first piece-wise smooth constraint condition and thereby obtaining an electron density image; and (e) reconstructing the scaled image r_(1) using a second piece-wise smooth constraint condition and thereby obtaining an equivalent atomic number image. In the present disclosure, the noise in the dual-energy reconstructed image can be effectively prohibited while keeping the resolution by effectively using information inherent in data.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-07-01

A CT system and method thereof are discloses. The system includes: a fixed multi-plane multi-source X-ray generation device and a control system thereof that provide X-ray source used in luggage inspection; a single-energy, pseudo-dual-energy or spectral detector system and data transfer system that receive perspective data of X ray penetrating the luggage, and transfer the data to a computer for processing; a conveyor (110) and a control system thereof that control a speed for moving the luggage forth and back, and perform tomogram scanning; and a host computer system that performs tomogram reconstruction and provides man-machine interaction. The system takes full advantage of characteristics, such as high speed and stability, brought by the distributed ray sources which replace the normal slip ring technology. The system also adopts the idea of inverse-geometry CT, and reduces detector area and cost by increasing the number of ray sources. With the reduction of detector area, cone-beam artifacts and cup-shape artifacts caused by scattering are also reduced, and influence of the oblique effect on registration of dual-energy data is suppressed.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2015-07-02

The present invention provides an X-ray backscattering safety inspection system, comprising: an X-ray source comprising a plurality of target spots each individually controllable to emit X-rays; collimators configured to be respectively passed through the X-ray emitted from the plurality of target spots and output N pencil-shaped X-ray beams, and the N pencil-shaped X-ray beams are irradiated onto N locations of an object to be inspected; and N detectors configured to respectively receive scattering signals from the corresponding locations of the object to be inspected, in which N is a positive integer that is great than or equal to 2. The system may achieve double scannings in one scanning operation, which not only increases scanning speed but also enhances backscattering signal for imaging.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2015-07-02

The present disclosure provides a mobile back scattering imaging security inspection apparatus, comprising: a back scattering scanner (2), a detector (3), a controller (4), and a movable stage (1) configured to carry the back scattering scanner, the detector and the controller and being movable with respect to the object to be inspected; wherein the back scattering scanner is a distributed X-ray source comprising a plurality of target points (201), each of which is able to emit the ray beam individually, and wherein the back scattering scanner, the detector and the controller perform an imaging security inspection operation on the object to be inspected during moving along with the movable stage with respect to the object.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-12-29

A method for processing a ceramic scintillator array, characterized in that, comprising the following steps: (a) forming, in a first direction, a predetermined number of straight first-direction through-cuts which are parallel to each other and spaced from each other on a scintillator substrate by using laser; (b) adequately filling the first-direction through-cuts with an adhesive and solidifying the adhesive; (c) forming, in a second direction. a predetermined number of second direction through-cuts which are parallel to each other at a predetermined interval on the scintillator substrate by using laser, wherein the second direction is perpendicular to the first direction; and (d) adequately filling the second direction through-cuts with the adhesive and solidifying the adhesive bond.


Patent
Tsinghua University and NUCTECH COMPANY Ltd | Date: 2015-12-29

The present invention discloses an X-ray beam intensity monitoring device and an X-ray inspection system. The X-ray beam intensity monitoring device comprises an intensity detecting module and a data processing module, wherein the intensity detecting module is adopted to be irradiated by the X-ray beam and send a detecting signal, the data processing module is coupled with the intensity detecting module to receive the detecting signal and output an X-ray beam intensity monitoring signal, wherein the X-ray beam intensity monitoring signal includes a dose monitoring signal of the X-ray beam and a brightness correction signal of the X-ray beam. The X-ray beam intensity monitoring device can simultaneously perform dose monitoring and brightness monitoring, thereby improving the service efficiency of the X-ray beam intensity monitoring device. Moreover, the monitoring result of the X-ray beam intensity can be more accurate and reliable.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2015-12-03

The present disclosure provides a human body security inspection apparatus, comprising: a base on which an inspected human stands; a millimeter-wave transceiver configured to perform a millimeter-wave scanning operation on the body of the inspected human standing on the base so as to detect whether or not the inspected human carries contraband and output a first signal; and a metal sensing detector arranged within the base and configured to detect whether or not there is a metallic foreign object in underside of a shoe of the inspected human and output a second signal.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2016-06-22

A quick vehicle check system comprises a radiation source which produces a first X ray with a first dose and a second X ray with a second dose, wherein the first dose is smaller than the second dose, and the first X ray is used for checking a first part of a checked vehicle and the second X ray is used for checking a second part of the checked vehicle; a first sensor for detecting a set position of the checked vehicle; a second sensor for detecting a passing distance of the checked vehicle; and a control unit coupled with the first sensor and the second sensor, which receives the set position of the checked vehicle from the first sensor and receives the passing distance of the checked vehicle from the second sensor, and when it is determined that the set position of the checked vehicle reaches a scanning region, the control unit informs the radiation source to emit the first X ray; and when the passing distance of the checked vehicle reaches the preset distance, the control unit informs the radiation source to emit the second X ray so as to scan the second part.


Patent
Nuctech Company Ltd and Tsinghua University | Date: 2014-11-05

The present invention provides a high voltage pulse modulating power source based on alternate group triggering, which comprises: a DC stabilized voltage source for supplying power to the high voltage pulse modulating power source; a plurality of solid-state switches; a plurality of triggers corresponding to said plurality of solid-state switches, wherein each trigger provides a trigger signal to its corresponding solid-state switch to turn on said corresponding solid-state switch, wherein said plurality of triggers are divided into at least two groups of triggers; a time sequence control module, which, at time t1, controls said plurality of triggers to generate trigger signals so as to turn on said plurality of solid-state switches simultaneously, and at time t2, controls one group of said at least two groups of triggers to generate trigger signals to turn on solid-state switches corresponding to this group of triggers, wherein time t1 and time t2 appear alternately.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-02-18

There is provided a waveguide horn array, a method for forming the waveguide horn array, and an antenna system. The array includes a rectangular metal plate which is processed to have a cross section comprised of a plurality of rectangular holes arranged in the length direction of the rectangular metal plate, the lower part of each hole being formed as a rectangular waveguide, and the upper part of each hole being formed as a horn; and a groove extending in the direction along which the plurality of holes are arranged and having a predetermined depth, which is formed at two sides of the holes on the top surface of the rectangular metal plate. According to the embodiments, it is possible to maintain the good properties of the antenna in terms of bandwidth and directivity, while enhancing the isolation between the transmitting antenna and the receiving antenna in the system.


Patent
Tsinghua University and Nuctech Company Ltd | Date: 2015-04-30

The present disclosure discloses a method and system for inspecting cargoes. The method comprises: acquiring a transmission image of the inspected cargoes; processing the transmission image to acquire an interested region; extracting features from the interested region, and determining cargo information of the inspected cargoes according to the extracted features; and providing a proposed treatment suggestion of the cargoes based on the determined cargo information and at least a part of information in a manifest. The above solution can facilitate an image judgment person to accurately judge whether the concerned cargoes are allowed to pass.


Grant
Agency: Cordis | Branch: H2020 | Program: RIA | Phase: SC5-06-2016-2017 | Award Amount: 2.99M | Year: 2016

The COP21 outcome represents an important new strategic context for EU climate policy. Analysing the implications of this new context requires an interdisciplinary approach, combining analysis of the evolution of the international climate regime as well as of NDCs and their socio-economic implications. Such analysis is also urgent, given the timelines imposed by the Paris Agreement for a facilitative dialogue in 2018 with a view to creating the conditions for the revision of NDC in 2020. In order to address the context described above, this project has four objectives : 1) Assess the adequacy of the NDCs submitted at COP21 in light of the global temperature target of limiting warming to 2C/1.5C. Through the analysis of GHG scenarios and energy system scenarios , the project will pay particular attention to the concrete system changes induced by NDCs, and compare them with the changes required to meet the global temperature limit. The project will also analyse scenarios limiting warming to 1.5C, and the impact of NDCs on other sectors, in particular land-use. 2) Assess the implications of NDCs and deeper mitigation pathways on other European socio-economic objectives. By integrating GHG and energy system scenarios into a range of different macro-economic, global energy system models and other quantified methodologies, the project will investigate implications for European socio-economic objectives related to innovation and technology deployment; trade and competiveness; investment, financial flows and economic growth (green growth); and global energy markets and energy security. 3. Assess the adequacy of the outcomes of COP21, and the implications and opportunities emerging from ongoing UNFCCC negotiations. The project will undertake a social sciences-based (in particular international law and international relations) assessment of the outcome of COP21. 4) Policy recommendations for EU climate policy and climate diplomacy.


Patent
Tsinghua University and Beijing Hua Chuang Hong Li Energy Technologies Ltd | Date: 2012-08-08

A method for producing an assembled battery, comprising the following steps: (a) producing a plurality of unit cells; (b) arranging the plurality of unit cells in a nested manner such that one unit cell is disposed within another unit cell; and (c) electrically connecting the plurality of unit cells with one another in parallel or in series. The problem that toroidal batteries with high capacity, high power density and small thickness may have a large volume and low energy density is solved by connecting in parallel a plurality of unit cells nested within one another, and heat dissipation of the battery is also further improved. An assembled battery produced by the method is also provided.


Grant
Agency: Cordis | Branch: FP7 | Program: CP | Phase: ENERGY.2012.5.2.2 | Award Amount: 5.57M | Year: 2013

IMPACTS - The impact of the quality of CO2 on transport and storage behaviour will underpin the realisation of the EU CCS European Industrial Initiative implementation plan by developing knowledge and technology needed for Carbon Dioxide Capture, Transport and Storage (CCS) pilots and large-scale demonstrations. IMPACTS is linked to demonstration projects, and will therefore benefit from realistic data, adequate framework conditions and relevant cases provided by the projects. The objective of IMPACTS is to develop the CO2 quality knowledge base required for defining recommendations to ensure safe and reliable design, construction and operation of CO2 pipelines and injection equipment, and safe long-term geological storage of CO2. This will support the objectives of the Innovation Union and the competitiveness of the European CCS industry. The work will combine experimental and modelling work and, among others, the following scientific and technological objectives will be pursued: - To quantify fundamental properties of relevant CO2 mixtures. This includes phase behaviour, thermodynamics, fluid flow and chemical reactions. - To reveal the impacts of relevant impurities in the CO2 stream on the design and operation of the transport and storage infrastructure through techno-economic assessments. - To derive CO2 quality issues while considering integrity of the whole CCS chain. - To provide recommendations for optimized CO2 quality on a case-by-case basis in the form of tolerance levels, mixing protocols and material selection. - To build knowledge critical for implementation of optimized safe and cost-efficient transport and storage of CO2.


Patent
ROHM Semiconductor and Tsinghua University | Date: 2015-08-19

Provided are a method and a system for initializing an RF module through non-volatile control, including: storing, by a non-volatile storage array, configuration information for initializing the RF module, and backing up the configuration information when receiving a power-down instruction (S1); and reading, by an RF module initialization accelerator, the configuration information from the non-volatile storage array when receiving a power-up instruction, and transmitting the read configuration information to the RF module, thereby initializing the RF module (S2). With the technical solution given in the present invention, the initialization of an RF module becomes much faster, and the power consumption of a wireless communication terminal can be reduced. In addition, the initialization of various RF modules can be supported, and meanwhile the hardware resources can be saved, thereby enhancing the extensibility of the system.


Operation of the immune system critically depends on intercellular communication among multiple cell types, frequently in the form of physical cell-cell interactions. Germinal centers (GCs) are highly organized tissue microdomains in which high affinity, class-switched, antibody-producing cells and humoral immune memory are generated. Critical underlying cell-cell interaction events include at the minimum binary interactions between CD4 + T-helper cells and antigen-presenting dendritic cells (DCs), which ensure proper T-cell activation and acquisition of effecter potentials, and those between T-helper cells and antigen-activated B cells whereby the latter cells receive helper signals (e.g. CD40L) important for their proliferation, survival, and differentiation. How these critical cellular interaction events are molecularly regulated and dynamically orchestrated to support GC formation and function is still a study in progress. Signaling lymphocytic activation molecule (SLAM)-associated protein (SAP) has recently been defined as a pivotal molecule that controls cognate T-B interactions and GC formation. Detailed analysis of interaction and migration dynamics of SAP-deficient T cells has raised the interesting possibility that T cell:antigen-presenting cell interactions underlying GC development and function are regulated in a cell type- and spatiotemporal stage-specific manner. This has important implications for our understanding of synapse formation, helper signal delivery to B cells, follicular helper T-cell differentiation, and quality control of the GC reaction in general. A model of selective T-B interactions involving bi-directional feedback and feed-forward logic is proposed to underlie GC development and function. © 2012 John Wiley & Sons A/S.


A family of layered lanthanide (Pr, Nd, Sm, Eu, and Gd) hydroxide nanowires (NWs) has been synthesized via a hydrothermal route. These NWs are ∼8 nm in diameter and a few micrometres in length. The obtained Eu- and Gd-based layered hydroxide NWs consist of layered structure with two interlayer spacings. The effects of hydrothermal temperature and time on the transition of the layered structure were investigated. Photoluminescence of the Eu-based layered hydroxide NWs was also studied. These layered lanthanide hydroxide NWs combine the advantages of lanthanide and layered hydroxides, which will expand the inorganic layered materials and can be expected to be used as building blocks for further fabrication of functional nanostructures.


Qi H.,Tsinghua University | Kastenmuller W.,Tsinghua University | Germain R.N.,Tsinghua University
Annual review of cell and developmental biology | Year: 2014

Secondary lymphoid tissues are the sites of both innate and adaptive host defense. Aside from the relatively static nonhematopoietic stromal elements and some macrophages and dendritic cells, most of the cells in these tissues are in constant movement, but the organs maintain a defined microanatomy with preferred locations for the bulk of T cells, B cells, and other lymphocytes and subsets of myeloid cells. Here we describe both the cell dynamics and spatial organization of lymph nodes and review how both physical features and molecular cues guide cell movement to optimize host defense. We emphasize the role of locality in improving the efficiency of a system requiring rare cells to find each other and interact productively through membrane-bound or short-range secreted mediators and highlight how changes in steady-state cell positioning during an infectious challenge contribute to rapid generation of productive responses.


Zhai H.,Tsinghua University
International Journal of Modern Physics B | Year: 2012

In this review we will discuss the experimental and theoretical progresses in studying spin-orbit coupled degenerate atomic gases during the last two years. We shall first review a series of pioneering experiments in generating synthetic gauge potentials and spin-orbit coupling in atomic gases by engineering atom-light interaction. Realization of spin-orbit coupled quantum gases opens a new avenue in cold atom physics, and also brings out a lot of new physical problems. In particular, the interplay between spin-orbit coupling and inter-atomic interaction leads to many intriguing phenomena. By reviewing recent theoretical studies of both interacting bosons and fermions with isotropic Rashba spin-orbit coupling, the key message delivered here is that spin-orbit coupling can enhance the interaction effects, and make the interaction effects much more dramatic even in the weakly interacting regime. © 2012 World Scientific Publishing Company.

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