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控制理论与应用（英文版） 2011年第2期9卷 302-306页

作者： Jianwei XIA 1,2,Hongbin ZHANG 3 1.school of Automation,Southeast university,Nanjing Jiangsu 210096,china 2.school of Mathematics science,Liaocheng university,Liaocheng Shandong 252000,china 3.school of electronic Engineering,university of electronic science and technology,chengdu Sichuan 610054,china school of Automation Southeast University Nanjing Jiangsu China school of Mathematics science Liaocheng University Liaocheng Shandong China school of electronic Engineering University of Electronic Science and Technology Chengdu Sichuan China

The global robust exponential stability of a class of neural networks with polytopic uncertainties and distributed delays is investigated in this ***-dependent Lypaunov-Krasovskii functionals and free-weighting matrices are employed to obtain sufficient condition that guarantee the robust global exponential stability of the equilibrium point of the considered neural *** derived sufficient condition is proposed in terms of a set of relaxed linear matrix inequalities (LMIs),which can be checked easily by recently developed algorithms solving LMIs.A numerical example is given to demonstrate the effectiveness of the proposed criteria.

关键词： Neural networks Polytopic uncertainties Distributed delays Delay-dependent Global robust exponential stability

On the maximum likelihood method for target localization using MIMO radars

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science china(Information sciences) 2010年第10期53卷 2127-2137页

作者： XIA Wei , HE ZiShu & LIAO YuYu school of electronic Engineering, university of electronic science and technology of china, chengdu 611731, china 1. school of electronic Engineering University of Electronic Science and Technology of China Chengdu 611731 China

A multiple-input multiple-output (MIMO) radar uses multiple antennas to simultaneously transmit multiple independent probing signals, and uses multiple antennas to receive the backscattered signals. The modeling of MIMO radar with transmit spatial diversity and coherent reception is addressed herein. The maximum likelihood (ML) method for parameter estimation using MIMO radars is considered, and two approximate ML algorithms are proposed. In the uniform noise scenario, one of the proposed algorithms performs similarly to the delay-and-sum beamformer which is optimal in the ML sense in single target case, while it outperforms the other proposed approximate ML algorithm at the cost of more computational load. In the non-uniform noise scenario, the proposed approximate ML algorithms both outperform the delay-and-sum beamformer. The efficiency of the proposed methods is validated by the simulation results.

关键词： maximum-likelihood multiple-input multiple-output (MIMO) radars parameter estimation

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 21 Institute of Geo-Spatial Information science and technology,university of electronic science and technology 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 technology of china,chengdu 610054,china State Key Lab Remote Sensing Sci Beijing 100101 Peoples R China Beijing Normal Univ Beijing 100101 Peoples R China Univ Elect Sci & Technol china Inst Geospatial Informat Sci & Technol Chengdu 610054 Peoples R China Chinese Acad Forestry Inst Forest Resources Informat Tech Beijing 100091 Peoples R China Univ Elect Sci & Technol china Sch Elect Engn Chengdu 610054 Peoples R 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

Study on ChemFET NO2 Gas Sensor Array

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稀有金属材料与工程 2006年第S3期 104-105页

作者： Guangzhong Xie~1 Junsheng Yu~1 Huilin Tai~1 Wusheng Suo~1 Yadong Jiang~1 Bangchao Yang~2 (1.school of Optoelectronic Information,university of electronic science & technology of china,chengdu 610054,china) (2.school of Microelectronics and Solid-State electronics,university of electronic science & technology of china,chengdu 610054,china)

Based on conventional metal-oxide-semiconductor field-effect transistor （MOSFET）,a novel kind of chemical field-effect transistor （ChemFET） gas sensor array has been designed and *** obtained sensor consists of self-assembly polyaniline （PAN） composite film containing poly（acrylic acid）（PAA） which was used as gate material of MOSFET instead of conventional metallic *** UV-Vis absorption spectra of PAN/PAA films were *** NO2gas sensitive property of the ChemFET sensor array was also *** show that the drain current of devices increases with increasing of back-side voltage,and decreases with the increase of NO2concentration when the NO2concentration is below 20μg/*** temperature dependence of ChemFET sensor array shows that the drain current of ChemFET sensor decreases with increasing of temperature.

关键词： NO2 sensitivity ChemFET sensor self-assembly polyaniline poly (acrylic acid)

Research and Development of Enterprise Information Visual Management System Based on GIS

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武汉理工大学学报 2006年第S1期28卷 339-343页

作者： YANG Liqing,LI Xunbo (school of Mechatronics Engineering,university of electronic science and technology of china,chengdu 610054, china) school of Mechatronics Engineering University of Electronic Science and Technology of ChinaChengdu 610054China

Aiming at managing enterprise information,we have done research and development on enterprise information visual management system based on geographic information system (GIS). In this paper,basis function,design scheme and implement are introduced. Space data and attribute data are supervised with a database. And the functions of GIS,such as display,edit and print,are utilized. The map information and the enterprise information are visually managed and integrally supervised.

关键词： GIS enterprise information management visualization

Syntheses of amphiphilic biodegradable copolymers of poly(ethyl ethylene phosphate) and poly(3-hydroxybutyrate) for drug delivery

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science china Chemistry 2009年第7期52卷 961-968页

作者： CHENG Jing1 & WANG Jun2 1 Department of Polymer science and Engineering, university of science and technology of china, Hefei 230026, china 2 Hefei National Laboratory for physical sciences at Microscale, school of Life sciences, university of science and technology of china, Hefei 230027, china Department of Polymer science and Engineering University of Science and Technology of China Hefei 230026 China Hefei National Laboratory for physical sciences at Microscale School of Life Sciences University of Science and Technology of China Hefei 230027 China

Biodegradable and amphiphilic triblock copolymers poly(ethyl ethylene phosphate)-poly(3-hydroxybutyrate)-poly(ethyl ethylene phosphate) (PEEP-b-PHB-b-PEEP) have been successfully synthesized through ring-opening polymerization. The structures are confirmed by gel permeation chromatography and NMR analyses. Crystallization investigated by X-ray diffraction reveals that the block copolymer with higher content of poly(ethyl ethylene phosphate) (PEEP) is more amorphous, showing decreased crystallizability. The obtained copolymers self-assemble into biodegradable nanoparticles with a coreshell micellar structure in aqueous solution, verified by the probe-based fluorescence measurements and transmission electronic microscopy (TEM) observation. The hydrophobic poly(3-hydroxybutyrate) (PHB) block serves as the core of the micelles and the micelles are stabilized by the hydrophilic PEEP block. The size and size distribution are related to the compositions of the copolymers. Paclitaxel (PTX) has been encapsulated into the micelles as a model drug and a sustained drug release from the micelles is observed. MTT assay also demonstrates that the block copolymers are biocompatible, rendering these copolymers attractive for drug delivery.

关键词： poly(3-hydroxybutyrate) polyphosphoester drug delivery polymeric nanoparticles

Corner occupying theorem for the two-dimensional integral rectangle packing problem

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science china(Information sciences) 2012年第11期55卷 2466-2472页

作者： HUANG WenQi1,YE Tao1 & CHEN DuanBing2 1school of Computer science and technology,Huazhong university of science and technology,Wuhan 430074,china 2Web sciences Center,school of Computer science,university of electronic science and technology of china,chengdu 611731,china 1. school of Computer science and technology Huazhong University of Science and Technology Wuhan 430074 China2. Web Sciences Center School of Computer Science University of Electronic Science and Technology of China Chengdu 611731 China

This paper proves a corner occupying theorem for the two-dimensional integral rectangle packing problem,stating that if it is possible to orthogonally place n arbitrarily given integral rectangles into an integral rectangular container without overlapping,then we can achieve a feasible packing by successively placing a rectangle onto a bottom-left corner in the *** on this theorem,we might develop e?cient heuristic algorithms for solving the integral rectangle packing *** fact,as a vague conjecture,this theorem has been implicitly mentioned with different appearances by many people for a long time.

关键词： rectangle packing bottom-left corner occupying theorem NP hard

The characteristic properties of PEDOT nano-particle based on reversed micelle method

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science china(Technological sciences) 2010年第9期53卷 2355-2362页

作者： ZHENG HuaJing,JIANG YaDong,XU JianHua & YANG YaJie State Key Laboratory of electronic Thin Films & Integrated Devices,school of Optoelectronic Information,university of electronic science and technology of china,chengdu 610054,china 1. State Key Laboratory of electronic Thin Films & Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu 610054 China

Based on the study of a new type of conducting polymer poly (3,4-ethylenedioxythiophene) (PEDOT),this paper focuses on the preparation and the materials properties of PEDOT nanoparticles made by reversed micelle *** on optical,electrical and the thermal stability of PEDOT nanoparticles were carried *** main results were as follows: The small-sized PEDOT nanoparticles were prepared by different methods,such as ultraviolet/visible (UV-Vis) spectroscopy,fourier-transform infrared (FT-IR) spectrum,scanning electron microscopy (SEM) and so *** Bragg peaks of nanoparticles at 6.7°,12.7°,25° were observed by XRD and the good orientation of molecular chain was attributed to the effective doping of toluene-p-sulfonic acid,which also resulted in an enhancement of thermal stability of nanoparticles compared with the conventional ***,the gas sensitivity of nanoparticles deposited on quartz crystal microbalance (QCM) was studied and the nanopartices deposited device exhibited excellent sensitivity to HCl gas at low *** sensitivity of the nanoparticles by the reverse micelle was better than that of the common PEDOT particles.

关键词： poly (3 4-ethylenedioxythiophene) conducting polymer reversed micelle n-particle photoelectric properties thermal stability

Some geometric properties of successive difference substitutions

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science china(Information sciences) 2011年第4期54卷 778-786页

作者： HOU XiaoRong 1,XU Song 1,2 & SHAO JunWei 1 1 school of Automation Engineering,university of electronic science and technology of china,chengdu 611731,china 2 Faculty of science,Ningbo university,Ningbo 315211,china 1. school of Automation Engineering University of Electronic Science and Technology of China Chengdu 611731 China2. Faculty of Science Ningbo University Ningbo 315211 China

This paper provides a new,geometric perspective to study successive difference substitutions,and proves that the sequence of the successive difference substitution sets is not *** interesting result that a given k-dimensional rational hyperplane can be transformed to a k-dimensional coordinate hyperplane of new variables by finite steps of successive difference substitutions is ***,a sufficient condition for the sequence of the successive difference substitution sets of a form being not terminating is *** is,a class of polynomials which cannot be proved to be positive semi-definite by the successive difference substitution method are obtained.

关键词： successive difference substitutions nonnegativity decision of forms Barycentric subdivision

Genes for resistance to stripe rust on chromosome 2B and their application in wheat breeding

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Progress in Natural science:Materials International 2009年第1期19卷 9-15页

作者： Peigao Luo a,b,Xueyun Hu a,Huaiyu Zhang a,Zhenglong Ren a,b,a State Key Laboratory of Plant Breeding and Genetics,Sichuan Agriculture university,Ya’an,Sichuan 625014,china b school of Life science and technology,university of electronic science and technology of china,chengdu 610054,china [a]State Key Laboratory of Plant Breeding and Genetics Sichuan Agriculture University Ya’an Sichuan 625014 China [b]School of Life Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China

Stripe rust,caused by Puccinia striiformis ***,is one of the most damaging diseases of wheat *** resistant cultivars is the most economic and environmental friendly way to control the *** are many resistance genes to stripe rust located on wheat chromosome ***,we propose a strategy to construct the recombinant wheat chromosome 2B with multiple resistances to stripe rust by making crosses between wheat lines or cultivars carrying Yr genes and using marker-assisted selection,based on the reported information about resistance spectrum,chromosomal location,and linked markers of the *** the resistance genes on 2B would afford a valuable strategy to control the disease by cultivating varieties with durable *** possibility,efficiency,and prospect of the suggested strategy are reviewed in the paper.

关键词： Puccinia striiformis Yr gene 2B chromosome Stripe rust Marker-assisted selection