Northeastern University is a public university in the city of Shenyang, Liaoning Province, China. With an annual enrollment of over 20,000 students, it is one of China's high level universities designated for the state key construction of the 211 Project and 985 Project. Wikipedia.
Northeastern University China | Date: 2015-08-28
The present invention relates to controlled cooling in manufacture of steel plate, and in particular, to an on-line cooling system for controlled rolling with an inter-pass cooling process, which comprises a rolling mill and on-line cooling equipment. The cooling equipment is accessorily arranged on the exit of the rolling mill, so that the rolling mill and the cooling equipment are combined. One rolling mill and one set of on-line cooling equipment are considered a cooling group, and several such groups are connected in series, so the steel plate can be cooled in any rolling pass. In this invention, both the cooling system and the water supply system are arranged on the main frame, and the rolling process and the cooling process are synchronized by using inter-pass cooling. Consequently, satisfied rolling effect in the condition of a temperature gradient along the thickness direction, grain refinement at the surface and drastic strength improvement without sacrificing toughness are achieved. Besides, better quality of the plate center region is obtained, double bulging is avoided and the yield of steel plate is improved due to the higher deformation permeability.
Northeastern University China | Date: 2014-07-22
A method for recovering alkali and aluminum during treatment of Bayer red mud using a calcification-carbonation method, including steps of mixing the Bayer red mud with calcium aluminate or with calcium aluminate and lime, performing calcification dealkalization conversion in a high-concentration alkaline liquor, and carbonizing the calcified residues produced during dealkalization to obtain carbonized residues; and then performing low-temperature aluminum dissolution, aluminum precipitation and the like to obtain calcium aluminate products, which is returned to the calcification dealkalization conversion of the red mud for recycling. Part of an alkali-containing and aluminum-containing liquid phase after calcification dealkalization conversion can be used as supplementary alkali in the Bayer production course for recycling. The method is energy-saving and environmentally-friendly, and allows recovering alkali and aluminum from the red mud and harmless treatment of the Bayer red mud.
Northeastern University China | Date: 2017-01-18
The present invention relates to a preparation method of high oriented silicon steel, and belongs to the technical field of metallurgy. The preparation method is performed according to the following steps of: (1) melting to obtain molten steel according to set components in percentage by weight: 0.001-0.003% of C, 5.0-6.6% of Si, 0.2-0.3% of Mn, 0.05-0.12% ofAl , 0.01-0.04% of V, 0.03-0.06% of Nb, 0.02-0.03% of S, 0.009-0.020% of N, O which is less than or equal to 0.0020%, and the balance being Fe and unavoidable impurities; (2) forming cast strips after a thin-strip casting course; (3) hot-rolling the cast strips under inert atmosphere conditions; (4) cooling the hot-rolled cast strips to 550-600 DEG C, coiling the cooled cast strips, and performing low-temperature hot rolling/warm rolling on the coiled cast strips under a nitrogen atmosphere condition; (5) removing oxidized scales though pickling, and then performing cold rolling for multiple times; (6) performing recrystallization annealing, coating with an MgO layer, and finally coiling; (7) performing purification annealing under hydrogen circulation conditions; and (8) removing oxidized scales, coating with an insulating layer, performing flat stretch annealing, and performing air-cooled coiling.
Northeastern University China | Date: 2017-03-08
The present invention relates to the field of environmental protection, in particular to a method for recovering alkali and aluminum in the course of treatment of Bayer red mud by using a calcification-carbonation method. The method comprises the following steps of after mixing the Bayer red mud with calcium aluminate or with the calcium aluminate and lime, performing calcification dealkalization conversion in high-concentration alkaline liquor of which the caustic alkali concentration is 100-300g/L, enabling all of a silicon-containing phase in the red mud to be converted into hydrated garnet to enter calcified residues produced during dealkalization, and carbonizing the calcified residues so as to obtain carbonized residues; and then performing the working procedures including low-temperature aluminum dissolution, aluminum precipitation and the like so as to obtain calcium aluminate products, wherein the calcium aluminate is returned to the course of the calcification dealkalization conversion of the red mud for recycling. Part of an alkali-containing and aluminum-containing liquid phase after calcification dealkalization conversion can be used as supplementary alkali in a Bayer production course for recycling. According to the method disclosed by the present invention, recovering alkali and aluminum from the red mud and harmless treatment of the Bayer red mud can be realized, so that the method is an energy-saving environmentally-friendly utilization method of the red mud.
Agency: Department of Health and Human Services | Branch: National Institutes of Health | Program: STTR | Phase: Phase I | Award Amount: 224.99K | Year: 2015
DESCRIPTION provided by applicant Clinical treatment of infants in the neonatal intensive care unit NICU is particularly challenging due to their small anatomies medical instability and immature physiological processes Treatment is often complicated by the lack of therapeutic devices and instrumentation designed specifically to accommodate this unique patient population For instance current vascular access catheters are not specifically designed and customized for the very small vasculature of neonatal patients which exacerbates common complications including vessel perforation thrombotic occlusions catheter breakage and infection Creating sophisticated patient specific neonatal catheters would dramatically reduce these complications and work to better serve this population D printing offers the ability to generate complex and patient specific D architectures Our collaborators at Northeastern University are pioneering D Magnetic Printing a new technique in which reinforcing ceramic fibers are aligned with magnetic fields during the printing process to create composites with highly tunable reinforcement architectures We will use D Magnetic Printing to produce strong flexible patient specific neonatal vascular access catheters Specifically we will generate customizable composite catheter tubing with enhanced wall stiffness and strength while maintaining flexibility burst strength and kink resistance Such a novel design approach will allow production of next generation neonatal vascular access catheters with thinner walls permitting reduction of catheter diameters and or higher fluid transport rates D Magnetic Printing of neonatal catheters offers the advantages of improved resistance to catheter sidewall collapse and kinking that often leads to catheter occlusion and higher fluid transport rates which will minimize the probability of thrombus and fibrin sheath formation Furthermore the D printing technique is compatible with conventional catheter materials such as polyurethane and silicone and allows utilization of biocompatible fibers like hydroxyapatite facilitating regulatory approval pathways The printing method is robust low cost and scalable In Phase I we will print a variety of catheter tubing with customized fiber architectures including longitudinal lateral and radial reinforcement using both polyurethane and silicone Sample characterization will be used to fine tune a finite element analysis model of the material This model will be used to design improved tubing for comparison to conventionally extruded tubing Our primary objective is to demonstrate the production of tubing with reduced wall thickness optimized mechanical properties and enhanced flow characteristics In Phase II this model will be used to design functional catheters having complex reinforcement architecture PUBLIC HEALTH RELEVANCE In this program a novel Magnetic D Printing technique will be developed for printing pediatric catheters This technique will enable highly customized immediate printing of devices for a population that often has unique and underserved requirements The technique introduces a novel means of controlling the alignment of reinforcing fibers which will give the designer a powerful tool to improve critical catheter characteristics such as wall thickness flow rate and kink resistance which are especially important in the small sizes required by pediatric patients These improvements will ultimately improve performance and reduce catheter related complications
Agency: Department of Health and Human Services | Branch: National Institutes of Health | Program: STTR | Phase: Phase I | Award Amount: 225.00K | Year: 2015
DESCRIPTION provided by applicant Atrial fibrillation AF is the most common diagnosed arrhythmia with the number Americans diagnosed with AF estimated at million and continuing to increase as the population ages Electrical activity during AF is characterized by complex activation patterns that are difficult to map However there is growing evidence that AF is driven by stable sources in the atria such as rotors or focal activity The most widely used ablation and surgical interventions to treat patients with AF use generalized empiric strategies that target that do not consider the specific mechanisms of the arrhythmia To date there are no established methods utilizing AF electrograms that effectively locate AF sources in the atria We have recently developed an electrogram morphology recurrence analysis that has been able to identify areas of the atria that have high rates of electrogram morphology recurrence Our preliminary study has shown that in patients who underwent ablation targeting the pulmonary veins when the electrograms with highest recurrence rates were located in the left versus right atrium ablation success rates were higher In contrast having these fast recurring electrograms in the right atrium indicated a very poor ablation success rate Additionally high resolution electrical mapping performed in a canine model of AF showed that morphology recurrence mapping could identify areas of rotor activity These preliminary data suggest that a mapping and ablation strategy based on morphology recurrence analysis could be used in the treatment of AF Phase I of this study involves the development of a prototype mapping software that can generate electrogram morphology recurrence maps in a real time clinical setting and the evaluation of this system on ablation in ten patients who have previously failed conventional AF ablation The mapping software will collect digital recordings from a basket catheter positioned in the right atrium and then the left atrium The maps will provide easy identification of the site with high morphology recurrence which can be related back to the anatomy with electroanatomic mapping If sites of high morphology recurrence rates represent areas at or near rotors or focal sources then we expect either acute termination of the AF or significant slowing of the AF activation rate A successful Phase I study showing that ablation via recurrence mapping produces AF termination or slowing in the majority of the ten patients would support the need for a larger study with longer term follow up Commercialization possibilities for this mapping approach include the production of a stand alone system or integration into an existing mapping system PUBLIC HEALTH RELEVANCE Atrial fibrillation AF is rapidly emerging health issue in the United States particularly among the elderly Currently used ablation and surgical approaches to treat AF utilize empirically determined strategies targeting the pulmonary veins This project investigates a novel electrogram mapping technique that may provide patient specific information regarding AF sources in the atria
Agency: National Science Foundation | Branch: | Program: STTR | Phase: Phase I | Award Amount: 225.00K | Year: 2016
The broader impact/commercial potential of this Small Business Technology Transfer (STTR) project will be the development of a cell sorting system to allow separation of two or more cell types to be used in cell therapies for treatment of cancer and other diseases. Purification of specific cell populations from complex materials such as blood is a critical component of cell therapy manufacturing. However, since most protocols for clinical-grade cell purification rely on binding of magnetic particles to cells, promising cell therapies face the risk of transplanting residual and potentially toxic magnetic particles to human subjects. The steps currently required to eliminate this risk add complexity, time and cost to cell therapy manufacturing, limiting the wide-scale usefulness of promising new cell therapies. This project will develop a novel cell separation technology, free of magnetic particles, that can be readily scaled to levels required to enable clinical-scale manufacturing of highly pure and highly viable cell-based therapeutics. The aim is to perform multi-target cell sorting while simultaneously leaving cells free from contaminating tags. This STTR Phase I project proposes to develop a novel affinity chromatographic cell sorting (AFFICS) system, based on proprietary dissolvable hydrogel microbeads, for efficient simultaneous separation of two and more cell types directly from heterogeneous cell environments without requiring magnetic or fluorescent tagging of cells. To achieve this, the objectives are to 1) Design a column-based affinity chromatographic system with functionalized dissolvable hydrogel microbeads for single surface marker-based cell isolation from complex cell suspensions, leading to cell capture and target cell populations with >85% purity and viability. 2) Develop tandem connection of multiple columns for sequential cell separation based on two or more surface markers on a large scale. 3) Optimize the rapid release mechanism required for efficient simultaneous separation of two and more cell subpopulations while maintaining cell phenotype and viability. The proposed system will provide multi-target cell sorting at clinical scale while simultaneously leaving cells free of residual magnetic or fluorescent affinity tags.
Agency: Department of Defense | Branch: Navy | Program: STTR | Phase: Phase I | Award Amount: 80.00K | Year: 2016
Novel approaches are needed to improve the performance and reduce the size, number and signature of antennas with significantly enhanced efficiency in HF-UHF. It has been shown recently hesitivity, which is able to characterize the performance of the material and categorize the radiation efficiency of magnetodielectric wire antennas; the higher the hesitivity, the higher the attainable antenna efficiency over the frequency range. Further hesitivity improvement by 10 over state of the art is required for magnetic films on ultra-thin carrier substrates since much higher antennas efficiencies are greatly desired. Based on their extensive expertise on RF magnetic film materials and devices, the principal investigators propose to develop a good understanding of hesitivity and bring up the relationship between hesitivity and the well-known magnetic material parameters. Then the PIs will demonstrate new candidate magnetic films with 10 higher hesitivities (5~10107 O/m) on ultra-thin SiO2 carrier films (
Lang J.,Northeastern University China
Optics Express | Year: 2012
In this paper, we propose a novel secure image sharing scheme based on Shamir's three-pass protocol and the multiple-parameter fractional Fourier transform (MPFRFT), which can safely exchange information with no advance distribution of either secret keys or public keys between users. The image is encrypted directly by the MPFRFT spectrum without the use of phase keys, and information can be shared by transmitting the encrypted image (or message) three times between users. Numerical simulation results are given to verify the performance of the proposed algorithm. © 2012 Optical Society of America.
Northeastern University China | Date: 2016-08-17
An energy internet and a hierarchical control system and a control method thereof, belong to the field of energy internet control and electrical technology. The energy internet comprises an energy router module (S8), an energy switch module (S12) and an energy subnet module (S18); the hierarchical control system of the energy internet comprises a data collection module (S54), an energy prediction unit (S55), an energy balance judgment module (S58), an energy surplus-deficit judgment module (S60), an energy balance control unit (S61), a power state regulation module (S64) and a frequency voltage regulation module (S59); the stability of the distributed power generation system and the high utilization of renewable energy are ensured to a maximum extent by reasonably monitoring all distributed generations (S38-S39) and local loads (S44-S45) in the energy internet, and predicting power generation/load state as well as optimizing electric energy in the energy internet using the energy router (S9-S11). A multi-agent consensus algorithm and a drooping control method are adopted for cooperative control on each device in the energy subnet to realize consistency between the node frequency of each device in the energy subnet and the power frequency of the distribution grid and stabilization of node voltage.