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C^MC^N D-computable state

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Science china(Physics,Mechanics & Astronomy) 2008年第9期51卷 1300-1307页

作者： LIU DongDong1,2.& DI YaoMin1 1 School of Physics & electronic engineering,Xuzhou Normal University,Xuzhou 2.1116,{2. 2.School of Mathematics & Physics Science,Xuzhou institute of technology,Xuzhou 2.1008,{2. School of Physics & electronic engineering Xuzhou Normal University Xuzhou China School of Mathematics & Physics Science Xuzhou Institute of Technology Xuzhou China

The notions of D-computable state and D-concurrence are generalized to the CMCN system. A class of D-computable state on CMCN is given and the calculating method of the lower bound of D-concurrence is provided. Th... 详细信息

关键词： quantum entanglement entanglement of formation concurrence D-computable state

A general communication performance evaluation model based on routing path decomposition

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Journal of Zhejiang University-Science C(Computers and electronics) 2011年第7期12卷 561-573页

作者： Ai-lian CHENG 1,Yun PAN 1,2.Xiao-lang YAN 2.Ruo-hong HUAN 3 (1 Department of information Science and electronic {2.,Zhejiang University,Hangzhou 31002.,china) (2.institute of VLSI Design,Zhejiang University,Hangzhou 31002.,china) (3 College of Computer Science and technology,Zhejiang University of technology,Hangzhou 31002.,china) Department of information Science and electronic {2. Zhejiang University Hangzhou China institute of VLSI Design Zhejiang University Hangzhou China College of Computer Science and technology Zhejiang University of Technology Hangzhou China

The network-on-chip (NoC) architecture is a main factor affecting the system performance of complicated multi-processor systems-on-chips (MPSoCs).To evaluate the effects of the NoC architectures on communication efficiency,several kinds of techniques have been developed,including various simulators and analytical *** simulators are accurate but time consuming,especially in large space explorations of diverse network configurations;in contrast,the analytical models are fast and flexible,providing alternative methods for performance *** this paper,we propose a general analytical model to esti-mate the communication performance for arbitrary NoCs with wormhole routing and virtual channel flow *** resolve the inherent dependency of successive links occupied by one packet in wormhole routing,we propose the routing path decomposition approach to generating a series of ordered link *** we use the traditional queuing system to derive the fine-grained transmission latency for each network *** to our experiments,the proposed analytical model provides a good approximation of the average packet latency to the simulation results,and estimates the network throughput precisely under various NoC configurations and ***,the analytical model runs about 10 5 times faster than the cycle-accurate NoC *** applications of the model including bottleneck detection and virtual channel allocation are also presented.

关键词： Analytical model Communication performance Network-on-chip (NoC) Queuing system Routing path decom-position Virtual channel

Influence of p-layer on the performance of n-i-p μc-Si:H thin film solar cells

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Science china(Physics,Mechanics & Astronomy) 2010年第11期53卷 2042-2046页

作者： YUAN YuJie 1,2.ZHANG KaiLiang 1,2.WEI Zhen 1,2.& GENG XinHua 3 1 College of electronics information {2.,Tianjin University of technology,Tianjin 300384,china 2.Tianjin Key Laboratory of Film electronic and Communication Devices,Tianjin University of technology,Tianjin 300384,china 3 institute of Photo-electronics Thin Film Devices and Technique,Nankai University,Tianjin 300071,china College of electronics information {2. Tianjin University of Technology Tianjin China Tianjin Key Laboratory of Film electronic and Communication Devices Tianjin University of Technology Tianjin China institute of Photo-electronics Thin Film Devices and Technique Nankai University Tianjin China

The high pressure radio frequency plasma enhanced chemical vapor deposition (RF-PECVD) process was adopted to prepare the n-i-p microcrystalline silicon solar cells,the influence of p-type layers on the performance of the solar cells was investigated,and the optimum p layer suited to the n-i-p microcrystalline silicon solar cells was *** experimental results demonstrate that the performance of the solar cells can be highly affected by the structural and optical properties of the p-layers,and the performance of solar cells can be greatly improved by optimizing p *** have achieved an initial active-area efficiency of 8.17% (V oc =0.49 V,J sc =2..9 mA/cm 2.,FF=67%) for the μc-Si:H single-junction n-i-p solar cells and an initial active-area efficiency of 10.93% (V oc =1.31 V,J sc =13.09 mA/cm 2.,FF=64%) for the a-Si:H/μc-Si:H tandem n-i-p solar cells.

关键词： microcrystalline silicon solar cells quantum confinement effect p-type layers

THz-TDS signal analysis and substance identification via the conformal split

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Science china(information Sciences) 2012年第1期55卷 49-63页

作者： XIE WeiXin1,2.LI Jing1,2.PEI JiHong2.1School of electronic engineering,Xidian University,Xi'an 710071,{2. 2.ntelligent information institute,Shenzhen University,Shenzhen 518060,{2. School of electronic engineering Xidian University Xi’an China Intelligent information institute Shenzhen University Shenzhen China

A terahertz time-domain spectroscopy(THz-TDS)imaging system can obtain high-dimensional signals with substance fingerprint *** introducing geometric algebra,a novel signal analysis approach to THz-TDS signals is developed based on an optical physical *** this approach,signals are represented with vectors in the high-dimensional real vector *** distribution properties and algebraic relationships of THz-TDS signals are *** is proved that every complex refractive index of substances relates to a unique 2.blade,the vectors corresponding to the samples of the same substance are collinear and belong to the intrinsic 2.blade of the *** decomposed through the conformal split with respect to a 2.blade,THz-TDS signals of high dimensionality can be related to vectors in a 2.dimensional *** on the conformal split properties we deduced,two criteria for substance identification on the basis of THz-TDS signals are ***,a novel substance identification method via the conformal split is *** the method,the 2.blade related to each "known" substance is calculated with two vectors corresponding to THz-TDS signals measured from samples of the substance but with dierent *** the conformal split with respect to those 2.blades,an identified vector corresponding to a THz-TDS signal is linearly related to the vector in a 2.dimensional *** substance of a sample can be identified using criteria on the projected vectors in the *** method can contribute to accurate classification and ***,two experiments are presented that show the feasibility and accuracy of this method.

关键词： terahertz time-domain spectroscopy substance identification geometric algebra conformal split

Quantum phase transition and entanglement in Li atom system

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Science china(Physics,Mechanics & Astronomy) 2008年第11期51卷 1677-1681页

作者： SI LiMing1 & HOU JiXuan2.1 Department of electronic engineering, School of {2. Science and technology, Beijing institute of technology, Beijing 100081, china 2.Laboratoire de Chimie, UMR 5182.CNRS, Ecole Normale Supérieure de Lyon, 46, Allée d’Italie, F-69364 Lyon Cedex 07, France Department of electronic engineering School of Information Science and Technology Beijing Institute of Technology Beijing China Laboratoire de Chimie UMR 5182 CNRS Ecole Normale Supérieure de Lyon Lyon Cedex 07 France

By use of the exact diagonalization method, the quantum phase transition and en- tanglement in a 6-Li atom system are studied. It is found that entanglement appears before the quantum phase transition and disappears after it in this exactly solvable quantum system. The present results show that the von Neumann entropy, as a measure of entanglement, may reveal the quantum phase transition in this model.

关键词： quantum phase transition entanglement von Neumann entropy

A multicast routing algorithm with multiple trees

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Journal of Systems engineering and electronics 2005年第2期16卷 426-432页

作者： Cui Xunxue 1,2., Gao Wei3 & Fang Hongyu41. New Star Research institute of Applied technology, Hefei 2.0031, P. R. {2. 2. Jiangsu Key Laboratory of Computer information Processing technology,Soochow University, Suzhou 2.5006, P. R. {2. 3. Department of electronic engineering and information Science,University of Science and technology of {2., Hefei 2.002., P. R. {2. 4. School of electronic Science and technology, Anhui University, Hefei 2.0039, P. R. {2. New Star Research institute of Applied technology Hefei 230031 P. R. China 2. Jiangsu Key Laboratory of Computer information Processing technology Soochow University Suzhou 215006 P. R. China Department of electronic engineering and {2. Science University of Science and Technology of China Hefei 230027 P. R. China School of electronic Science and technology Anhui University Hefei 230039 P. R. China

Quality of service (QoS) multicast routing has continued to be a very important research topic in the Internet. A method of multicast routing is proposed to simultaneously optimize several parameters based on multiobjective genetic algorithm, after the related work is reviewed. The contribution lies on that the selection process of such routing is treated with multiobjective optimization. Different quality criterions in IP network are taken into account for multicast communications. A set of routing trees is generated to approximate the Pareto front of multicast problem. Multiple trees can be selected from the final set of nondominated solutions, and applied to obtain a good overall link cost and balance traffic distribution according to some simulation results.

关键词： multicast routing quality of service multiobjective optimization genetic algorithms.

Analysis of forest backscattering characteristics based on polarization coherence tomography

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Science china(Technological Sciences) 2010年第S1期53卷 166-175页

作者： LUO HuanMin 1,LI XiaoWen 1,2.CHEN ErXue 3,CHENG Jian 4 & CAO ChunXiang 2. institute of Geo-Spatial information Science and {2.,University of electronic Science and {2. of china,Chengdu 610054,china 2.State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Beijing 100101,china 3institute of Forest Resources information Technique of Chinese Academy of Forestry,Beijing 100091,china 4 School of electronic engineering,University of electronic Science and {2. of china,Chengdu 610054,china institute of Geo-Spatial information Science and {2. University of Electronic Science and Technology of China Chengdu China State Key Laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing China institute of Forest Resources information Technique of Chinese Academy of Forestry Beijing China School of electronic engineering University of Electronic Science and Technology of China Chengdu China

It is difficult to make an inventory of vertical profiles of forest structure parameters in field ***,analysis and understanding of forest backscattering characteristics contribute to estimation and detection of forest vertical structure because of the close relationships between backscattering characteristics and structure *** vertical structure function in the complex interferometric coherence definition,which represents the vertical variation of microwave scattering with the penetration depth at a point in the 2.D radar image and can be used to analyze the forest backscattering characteristics,can be reconstructed from polarization coherence tomography(PCT).Based on PCT,the paper analyzes the forest backscattering characteristics and explores the inherent relationship between the result of PCT and the forest structure parameters from numerical simulation of Random Volume over Ground model(RVoG),Polarimetric SAR interferometry(PolInSAR)simulation of forest scene and PolInSAR data at L-band of the test site ***,the effects of the extinction coefficient and surface-to-volume scattering ratio in RVoG model on vertical backscattering characteristics are analyzed by means of numerical ***,by applying PCT to L-band POLInSAR simulations of forest scene,different variations of vertical backscattering due to different extinction coefficients and the ratios of surface-to-volume scattering resulting from different polarizations,forest types and densities are displayed and *** a concept of relative average backscattering intensity is presented,and the factors which affect its vertical distribution are also *** results show that there is high sensitivity of the vertical distribution of forest relative average backscattering intensity to the polarization,forest type and ***,based on repeat pass DLR E-SAR L-band airborne POLInSAR data,the capability of PCT technology for detection

关键词： backscattering characteristic POLInSAR PCT vertical structure function

Robust integral sliding mode control for uncertain systems with multiple time delays

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控制理论与应用（英文版） 2010年第2期8卷 211-214页

作者： Xiaoyu ZHANG, Xiangna LI (Department of electronic and information {2., North china institute of Science and technology, Beijing 101601, china) Department of electronic and information {2. North China Institute of Science and Technology Beijing China

This paper proposes a robust integral sliding mode (RISM) manifold and the corresponding stabilization control law for uncertain systems with multiple time-varying time delays based on the techniques of linear matrix inequalities (LMI). The sufficient condition for the existence of the RISM manifold is given in terms of LMI, and then, the sliding mode control (SMC) law that can keep the system state on the RISM manifold from the initial time moment is developed. The efficiency and feasibility of the results are illustrated by a numerical example.

关键词： Robust control Integral sliding mode Time-delay systems LMI

Advances in theory and applications of fuzzy clustering

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Chinese Science Bulletin 2000年第11期45卷 961-970页

作者： GAO Xinbo & XIE Weixin1. institute of electronic {2., Xidian University, Xi’an 710071, china 2. President office, Shenzhen University, Shenzhen 518060, china. institute of electronic {2. Xidian University Xi’an China President office Shenzhen University Shenzhen China

The summarization and evaluation of the advances in fuzzy clustering theory are made in the aspects including the criterion functions, algorithm implementations, validity measurements and applications. Several importa... 详细信息

关键词： cluster analysis fuzzy clustering cluster validity pattern recognition image processing.