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Chenglin L.,Yancheng Teachers University | Xiaohua W.,Yancheng Teachers University | Xinyi Z.,Fudan University | Guobin Z.,National Synchrotron Radiation Laboratory
2012 5th International Conference on Biomedical Engineering and Informatics, BMEI 2012 | Year: 2012

The vacuum ultraviolet (VUV) spectra of breast sickness tissues, benign or malign breast tumors were studied under the excitation of different VUV photons from a synchrotron radiation light source. The excitation spectra of different samples were monitored at 400 nm and 550 nm. The efficient excitation wavelengths were 133 nm, 193 nm and 252 nm, respectively. The differences of their fluorescence spectra were analyzed, and the results showed that their VUV spectra were different for various breast sickness tissues. There were two peaks in the spectrum when these tissues were excited by 133 nm. When 193 nm light was used to excite the tissues, there appeared a three-peak structure. There was only one distinct peak when these tissues were excited by 252 nm light. The differences of VUV spectra reflect the characteristics of various kinds of breast sickness tissues. The VUV fluorescence technique may be used in the diagnoses of breast tumor, especially available in finding the early cancers. © 2012 IEEE.


Zhu L.,USTC | Bao Y.,USTC | Wang S.-G.,UNCC | Zhou Q.,Huawei | Bao X.,National Synchrotron Radiation Laboratory
Lecture Notes in Electrical Engineering | Year: 2012

Accuracy of independent GPS navigation systems is tied to the map-matching (MM) algorithm, which overcomes GPS error and traffic map error to map ve-hicle GPS tracks onto corresponding roads. This paper presents a map-matching process compatible with junction adjusting. An innovative idea is expressed in pa-per to improve the accuracy of intersection node at vector map by utilizing the large amounts of GPS trajectory data, which come from map-matching procedure. With the adaptively corrected digital map, the simulation result gave better map-matching effect, and showed the effectiveness of map-matching compatible with junction adjusting. © 2012 Springer-Verlag Berlin Heidelberg.


Sun Y.,USTC | Shen L.,USTC | Wang X.,USTC | Shu Z.,USTC | Pei Y.,National Synchrotron Radiation Laboratory
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | Year: 2010

Collinear load instead of traditional waveguide load is advanced for Linac miniaturization. In order to develop high power collinear load, an efficient microwave-absorbing material of FeSiAl is employed, meanwhile responding simulation design method is proposed in this paper. CST simulations demonstrate that the operation frequency of the cavity falls linearly with a rate of about -14.74 kHz/mm3 to the FeSiAl coating volume, while the quality factor appears inversely proportional and can drop to about 25. Cavity dimensions were adjusted to compensate the frequency shift from 2856 MHz. Orthogonal tests indicate that the real part of the permeability of FeSiAl notably affect the operation frequency of load cavities, while the imaginary part of the permeability acts on the attenuation much. Eventually based on uniform power absorption principle, a six-cavity collinear load was designed with one-way attenuation of -29.47 dB, and the detail parameters are presented. © 2010 Elsevier B.V. All rights reserved.


Gao P.,CAS Shanghai Institute of Ceramics | Gu M.,Tongji University | Liu X.,CAS Shanghai Institute of Ceramics | Liu B.,Tongji University | And 4 more authors.
Journal of Alloys and Compounds | Year: 2014

The photoluminescence spectra of CuI crystals using synchrotron radiation as an excitation light source were obtained at 60 K. The emission peaks at 405, 415, 420 and 443 nm were observed. The possible origins of these peaks were discussed by the temperature dependence of luminescence spectra for CuI material. Meanwhile, the photoluminescence spectra of CuI powder with different excitation intensity were measured and the ultrafast luminescence component of CuI crystals was warranted to be attributed to the recombination of donor acceptor pair. Furthermore, the excitation process was studied by measuring the photoluminescence excitation spectra of CuI crystals and powder. © 2014 Elsevier B.V. All rights reserved.


Liu G.,National Synchrotron Radiation Laboratory | Wang L.,National Synchrotron Radiation Laboratory | Li W.,National Synchrotron Radiation Laboratory | Xuan K.,National Synchrotron Radiation Laboratory
IPAC 2013: Proceedings of the 4th International Particle Accelerator Conference | Year: 2013

Frequency analysis of the turn-by-turn BPM(Beam Position Monitor) data is a very useful numerical method for analysing the detrimental effect of the nonlinear resonances in storage rings, which has been used for nonlinear resonances measurement and correction by numerical fitting of the lattice components. The method is applied in HLSII storage ring for nonlinear model calibration by numerical fitting of the sextupole components with the effect of radiation damping and decoherence in this paper. Copyright © 2013 by JACoW.


Li S.-R.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Yesibolati N.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Qiao Y.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Ge S.-Y.,CAS Hefei Key Laboratory of Materials for Energy Conversion | And 3 more authors.
Journal of Alloys and Compounds | Year: 2012

Porous thin films composed of complex Fe/V oxides (crystalline Fe 2V 4O 13 and amorphous Fe 2V 4O 12.29) are prepared by electrostatic spray deposition technique. The crystalline Fe 2V 4O 13 thin film shows a high initial capacity of 409 mAh g -1. The cyclic voltammetry analysis of a Fe 2V 4O 13/Li cell reveals that the crystalline Fe 2V 4O 13 undergoes an irreversible phase transition when the lower cut-off voltage is below 2.5 V. Compared with the crystalline Fe 2V 4O 13, the amorphous Fe 2V 4O 12.29 thin film delivers a lower initial capacity of 349.9 mAh g -1 but exhibits better cycling performance in the voltage range of 1.0-4.0 V. After 50 cycles, its capacity can still reach around 200 mAh g -1. X-ray photoelectron spectroscopy (XPS) reveals that the Fe 2V 4O 12.29 thin film contains ions of mixed valence states V 5+/V 4+ and Fe 3+/Fe 2+, resulting in better rate capability for Fe 2V 4O 12.29 than for Fe 2V 4O 13. These results indicate that the amorphous Fe/V-oxide film is a promising electrode material for high energy applications. © 2011 Elsevier B.V. All rights reserved.


Li G.,Xidian University | Li Z.,Xidian University | Cao Q.,Xidian University | Huang Y.,Xidian University | Shi J.,National Synchrotron Radiation Laboratory
International Journal of Applied Ceramic Technology | Year: 2013

Terbium-activated YAl3(BO3)4 (YAl 3(BO3)4:Tb3+) phosphors were synthesized by both combustion method and solid-state reaction. It was found that the pure-phase YAl3(BO3)4 phosphors synthesized by combustion method were obtained at 1000°C, which was 200°C lower than that by solid-state reaction. The average particle size of the combustion-derived phosphors increased with increasing temperatures. The luminescence characteristics in ultraviolet (UV) - vacuum ultraviolet (VUV) ranges for the YAl3(BO3)4:Tb3+ phosphors were investigated. The bands from 175 nm to 300 nm were attributed to the 4f8-4f75d1 transitions of Tb3+. The other strong bands in the region from 125 nm to 175 nm were assigned to host absorption. The emission spectra showed the strongest emission at 542 nm corresponding to the 5D4→7F5 transition of Tb3+. Moreover, the combustion-derived YAl 3(BO3)4:Tb3+ phosphors generated more intense luminescence than the solid-state-derived phosphors under UV excitation. © 2013 The American Ceramic Society.


Wang M.,University of Science and Technology of China | Bao X.,National Synchrotron Radiation Laboratory | Zhu L.,University of Science and Technology of China | Bao Y.,University of Science and Technology of China
Advanced Materials Research | Year: 2012

Accuracy of independent GPS navigation systems is tied to the map-matching algorithm, which overcomes GPS error and traffic map error to map vehicle GPS tracks onto corresponding roads. The paper proposed an improved map-matching algorithm in which an intersection-based dynamic parallelogram criterion is used to improve the accuracy of navigation systems greatly. © (2012) Trans Tech Publications, Switzerland.


Liu G.,National Synchrotron Radiation Laboratory | Wang L.,National Synchrotron Radiation Laboratory | Li W.,National Synchrotron Radiation Laboratory | Xuan K.,National Synchrotron Radiation Laboratory
IPAC 2012 - International Particle Accelerator Conference 2012 | Year: 2012

Resonance driving terms including the information of nonlinear resonance can be usedto analyse the nonlinear effect of the accelerator. In recent years, the driving terms havebeen successfully measured from the spectral decomposition of the turn-by-turn BPM data inproton storage rings and driving term measurements become powerful tool to calibratenonlinear model of storage ring. In HLSII upgrade project, several TBT BPM systems will beinstalled in storage ring. The possibility of application driving term measurementtechniques in HLSII storage ring is studies theoretically and numerically in this paper.Copyright © 2012 by IEEE.


Li S.-R.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Ge S.-Y.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Qiao Y.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Chen Y.-M.,CAS Hefei Key Laboratory of Materials for Energy Conversion | And 3 more authors.
Electrochimica Acta | Year: 2012

Three-dimensional (3D) porous V 2O 5 and Fe 0.1V 2O 5.15 thin films have been prepared by electrostatic spray deposition technique. X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy are employed to investigate the structures and valence states of the films. Galvanostatic cell cycling, cyclic voltammetry and impedance spectroscopy are used to characterize their electrochemical properties. The Fe 0.1V 2O 5.15 thin film shows much better cycling performance than the non-doped V 2O 5 thin film. Fe 3+ can act as a stabilizing agent in the layered V 2O 5 and increase the reversibility of the charge and discharge processes towards deeper depth of lithium insertion/extraction. The dissolution of the active material in the electrolyte can also be significantly suppressed in the Fe-doped sample. Nevertheless, the Fe-doping causes a slight decrease in lithium ion diffusion coefficient. © 2012 Elsevier Ltd. All rights reserved.

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