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A generalized mean shift tracking algorithm

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Science China(Information Sciences) 2011年第11期54卷 2373-2385页

作者： CHEN JianJun 1,4,ZHANG SuoFei 1,AN GuoCheng 2.& WU ZhenYang 1,31 School of Information Science and Engineering,southeast university,nanjing 2.0096,China 2.Intelligence Engineering Lab,Institute of Software Chinese Academy of Sciences,Beijing 100190,China {2.,southeast university,nanjing 2.0096,China 4 nanjing Research Institute of Electronic Technology,nanjing 2.0013,China School of Information Science and Engineering Southeast University Nanjing China nanjing Research Institute of Electronic Technology Nanjing China Intelligence Engineering Lab Institute of Software Chinese Academy of Sciences Beijing China key laboratory of {2. {2. signal processing of ministry of education Southeast University Nanjing China

CAMSHIFT algorithm and Comaniciu/Meer algorithm are two fundamental frameworks of mean shift procedure for video target *** paper generalizes the two well-known mean shift tracking algorithms,originally due to Bradski and Comaniciu/Meer.A new general similarity function which defines the distance between the target model and target candidate is employed to calculate the pixel weights and the target *** target size is iteratively estimated and updated based on the zeroth order moment of the pixel *** we prove that both the CAMSHIFT algorithm and the Comaniciu/Meer algorithm can be included in the generalized mean shift tracking *** tracking performances of three mean shift algorithms in the unified framework are shown and compared in the experimental results.

关键词： mean shift CAMSHIFT video target tracking similarity measure

Effects of Meat and Phosphate Level on Water-Holding Capacity and Texture of Emulsion-Type Sausage During Storage

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Agricultural Sciences in China 2009年第12期8卷 1475-1481页

作者： WANG Peng,XU Xing-lian and ZHOU Guang-hong key laboratory of Meat {2. and Quality Control,{2. of education/nanjing Agricultural university,nanjing 2.0095,P.R.China key laboratory of Meat {2. and Quality Control Ministry of Education/Nanjing Agricultural University Nanjing 210095 P.R. China

This paper was designed to verify the influence of phosphate on water-holding capacity （WHC） and texture of emulsiontype sausage prepared with pre-rigor meat, ageing meat or frozen meat. Pre-rigor pork, ageing pork and frozen pork were pre-blended with five levels of phosphate and made into emulsion-type sausage. The yield, hardness and total expressible fluid （TEF） were measured with texture profile analysis machine and pressiometer when emulsion-type sausage was produced. Meanwhile, hardness and purge loss （PL） were measured during 30 d storage. As emusion-type sausage made by pre-rigor meat, higher yield and relatively stable hardness could be found. It indicated that increasing of phosphate level caused an alleviatable effects in increasing of hardness when emulsion-type sausage made by pre-rigor meat, but opposite effects made by ageing meat or frozen meat. The distribution of PL of emulsion-type sausage was found to be affected by phosphate addition. Significant decrease of PL could not be obtained by increasing of phosphate level during storage. Pre-rigor meat improved WHC and texture of emulsion-type sausage. Problem of WHC and texture of emulsiontype sausage during storage could not be resolved by single use of phosphate at relatively higher level （3%） of NaCl.

关键词： meat emulsion-type sausage water-holding capacity texture

Tissue P systems with cell separation: attacking the partition problem

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Science China(Information Sciences) 2011年第2期54卷 293-304页

作者： ZHANG XingYi1, WANG Shuo2. NIU YunYun2.& PAN LinQiang2.1key Lab of Intelligent Computing and signal {2. of {2. of education, School of Computer Science and Technology, Anhui university, Hefei 2.0039, China 2.mage {2. and Intelligent Control key laboratory of education {2. of China, Department of Control Science and Engineering, Huazhong university of Science and Technology, Wuhan 430074, China key Lab of Intelligent Computing and signal {2. of {2. of education School of Computer Science and Technology Anhui University Hefei China Image processing and Intelligent Control key {2. of {2. ministry of China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan China

Tissue P systems are distributed parallel and non-deterministic computing models in the framework of membrane computing, which are inspired by intercellular communication and cooperation between neurons. Recently, cell separation is introduced into tissue P systems, which enables systems to generate an exponential workspace in a polynomial time. In this work, the computational power of tissue P systems with cell separation is investigated. Specifically, a uniform family of tissue P systems with cell separation is constructed for effciently solving a well-known NP-complete problem, the partition problem.

关键词： membrane computing tissue P system cell separation partition problem

Simulation study of phase retrieval for hard X-ray in-line phase contrast imaging

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Science China(Physics,Mechanics & Astronomy) 2005年第4期48卷 450-458页

作者： YU Bin1,2. PENG Xiang1,2. TIAN Jindong1, NIU Hanben1, DIAO Luhong3 & LI Hua3 1. key laboratory of Optoelectronic Devices and Systems of {2. of {2., Institute of Optoelec- tronics, Shenzhen university, Shenzhen 518060, China 2. State key laboratory of Precision Measuring Technology and Instruments, Tianjin university, Tianjin 300072.China 3. key laboratory of Intelligent Information processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080,China key laboratory of Optoelectronic Devices and Systems of {2. of {2. Institute of Optoelectronics Shenzhen University Shenzhen China State key laboratory of Precision Measuring Technology and Instruments Tianjin University Tianjin China key laboratory of Intelligent Information {2. Institute of Computing Technology Chinese Academy of Sciences Beijing China

Two algorithms for the phase retrieval of hard X-ray in-line phase contrast imaging are presented. One is referred to as Iterative Angular Spectrum Algorithm (IASA) and the other is a hybrid algorithm that combines IASA with TIE (transport of intensity equation). The calculations of the algorithms are based on free space propagation of the angular spectrum. The new approaches are demonstrated with numerical simulations. Comparisons with other phase retrieval algorithms are also performed. It is shown that the phase retrieval method combining the IASA and TIE is a promising technique for the application of hard X-ray phase contrast imaging.

关键词： X-ray optics, phase contrast imaging, phase retrieval, angular spectrum, hard X-ray.

Polymer-assisted nanoparticulate contrast-enhancing materials

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Science China Chemistry 2010年第3期53卷 479-486页

作者： DING Yin1,3,HU Yong2.WU Wei1 & JIANG XiQun1 1laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering,College of Chemistry & Chemical Engineering,nanjing {2.,nanjing 2.0093,China 2.ational laboratory of Solid State Microstructure,Department of Material Science and Engineering,nanjing {2.,nanjing 2.0093,China 3key laboratory of Analytical Chemistry for Life Science,ministry of education,School of Chemistry and Chemical Engineering,nanjing {2.,nanjing 2.0093,China laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering College of Chemistry & Chemical Engineering Nanjing University Nanjing China key laboratory of Analytical Chemistry for Life Science Ministry of Education School of Chemistry and Chemical Engineering Nanjing University Nanjing China National laboratory of Solid State Microstructure Department of Material Science and Engineering Nanjing University Nanjing China

The application of nanotechnology in medicine research has significant potential in modern biomedical research,disease diagnosis and *** fluorophore-based detection techniques have been widely used as imaging and signal transduction tools for the detection of trace levels of *** photosensitivity of the fluorophores,however,limits their application in such complex environments as living bio-systems where degradation or photobleaching *** nanoparticles have unique and stable optical,electrical,magnetic and catalytic properties because of their various shapes,sizes and *** potential of the nanoparticles as novel imaging agents has been studied as a possible solution to this *** modification of inorganic nanoparticles could enhance their biostability in physiological conditions and ability of targeting bioactive molecules.

关键词： contrast agent cell image gold nanoparticles iron oxide nanoparticles carbon nanotubes polymeric-inorganic hybrid nanoparticles

Linear beamformer schemes with simple relay selection in MIMO relay networks

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 24-29+39页

作者： MENG Qing-min 1,2. PAN Su1, ZHENG Bao-yu1, ZHU Hong-bo1, YOU Xiao-hu2.1. Jiangsu key laboratory of Wireless Communications and Institute of {2. {2. and Transmission, nanjing university of Posts and Telecommunications, nanjing 2.0003, China 2. National Mobile Communications Research Lab, southeast university, nanjing 2.0096, China Jiangsu key laboratory of Wireless Communications and Institute of {2. {2. and Transmission Nanjing University of Posts and Telecommunications Nanjing 210003 China National Mobile Communications Research Lab Southeast University Nanjing 210096 China

This article considers a wireless multi-hop/mesh network where single multi-antenna source-destination pair communicates through a selected relay subset using simple relay selection under the constraint of fixed relay’s number. Compared with random selection, the simple relay selection can yield certain capacity advantages while linear zero-forcing (ZF) receiver and linear beamformer are considered at the relay. For match-filter (MF) beamformer and amplified-and-forward (AF) beamformer with a fixed number of relays, the capacities are given. Furthermore, we extend the simple selection methods to the relaying scheme with orthogonal-triangular (QR) beamformer and investigate these linear beamformer schemes over spatially correlated multi-input multi-output (MIMO) links for both the backward and forward channel over the two-hop MIMO relay networks.

关键词： wireless mesh networks multi-hop relaying capacity beamformer

Quick image-processing method of UAV without control points data in earthquake disaster area

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中国有色金属学会会刊：英文版 2011年第S3期21卷 523-528页

作者： LI Chang-chun1, ZHANG Guang-sheng1, LEI Tian-jie2. 3, GONG A-du2. 3 1. School of Surveying & Land Information Engineering, Henan Polytechnic university, Jiaozuo 454000, China 2. key {2. of Environmental Change and Natural Disaster, {2. of education, Beijing Normal university, Beijing 100875, China 3. {2. of Civil Affairs/{2. of education of China Academy of Disaster Reduction and Emergency Management, Beijing Normal university, Beijing 100875, China School of Surveying & Land Information Engineering Henan Polytechnic University Jiaozuo 454000 China key laboratory of Environmental Change and Natural Disaster Ministry of Education Beijing Normal University Beijing 100875 China ministry of Civil Affairs/ministry of {2. of China Academy of Disaster Reduction and Emergency Management Beijing Normal University Beijing 100875 China

The methods of unmanned aerial vehicles images splicing rapidly and rectifying without control points data, only using auxiliary data recorded by unmanned aerial vehicle (UAV) system, were researched. Two algorithms were proposed, including UAV images auto- splicing rapidly after image blocking and UAV images rectifying based on pseudo center points of auxiliary data. When SIFT algorithm for UAV images splicing is applied, the accuracy is very high, but the efficiency is very low. The splicing efficiency is improved greatly based on SIFT algorithm after image blocking. The results show that rectifying accuracy is very high and has no visual dislocation when pseudo center points of auxiliary data is applied.

关键词： unmanned aerial vehicles SIFT algorithm blocking quickly splicing rectification

Influence of Alternative Magnetic Field on the Diffusion of Al and Mg

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Journal of Materials Science & Technology 2004年第4期20卷 457-459页

作者： Xiaotao LIU, Jianzhong CUI, Yanhui GUO, Xiaoming WU and Jun ZHANGThe key laboratory of Electromagnetic {2. of Materials, {2. of education, Northeastern university, Shenyang 110004, China Mat. Electromagnetic Proc. Lab. Northeastern Univ. Shenyang 110004 China

The influence of an alternative magnetic field on the diffusion of Al and Mg in AI-Mg diffusion couple is studied. The diffusion zone is composed of two intermediate phases, namelyβ and γ phase. Thickness of each intermediate phase is examined. The results show that the alternative magnetic field increases the thicknesses of βand γ phase zone and the layer growth ofβ and γphase obeys the parabolic rate law. The growth rate of the β and γ phase are increased with the application of the alternative magnetic field. This change is manifested through a change in the frequency factor k0 and not through a change in the activation energy Q. The frequency factor k0 for intermediate phase growth with an alternative magnetic field is 39.95 cm2.s for 7 phase and 2.84×10-4 cm2.s for β phase compared with those without the magnetic field is 2..4 cm2.s for 7 phase and 1.53×10-4 cm2.s for β phase.

关键词： Alternative magnetic field Al-Mg Couple Intermediate phase Thickness Diffusion

Sufficient and necessary conditions for Lyapunov stability of Lorenz system and their application

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Science China(Information Sciences) 2010年第8期53卷 1574-1583页

作者： LUO Qi 1 , LIAO XiaoXin 2.& ZENG ZhiGang 2.1 College of Information and Control, nanjing university of Information Science and Technology, nanjing 2.0044, China 2.Department of Control Science and Engineering, Huazhong university of Science and Technology, Image processing and Intelligent Control key laboratory of education ministry of China, Wuhan 430074, China College of Information and Control Nanjing University of Information Science and Technology Nanjing China Department of Control Science and Engineering Huazhong University of Science and Technology Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Wuhan China

The sufficient and necessary conditions for Lyapunov stability of the zero equilibrium point of Lorenz system are discussed, and some brief criteria are presented for globally exponential stability, globally asymptotical stability and instability. Furthermore, the behavior of the non-zero equilibrium point of Lorenz system is also investigated, and several sufficient and necessary conditions are provided for locally exponential stability and instability. The established theorems in this paper develop and extend the existing achievements on Lyapunov stability of Lorenz system. In conclusion, by applying the obtained results, some less conservative feedback-control laws are derived to guarantee the globally exponential stability of the chaos control of Chen system, Lu¨ system, Yang-Chen system and Yu-Xia Li system.

关键词： Lorenz system Lyapunov stability sufficient and necessary condition bifurcation values globally exponential synchronization