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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 Engineering, North{2. {3. of Science and Technology, Beijing 101601,{2.) department of electronic and Information Engineering 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

Electrochemical performance of LiFePO_4 cathode material for Li-ion battery

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Rare Metals 2006年第z1期25卷 62-66页

作者： LI Shuzhong LI Chao FAN Yanliang XU Jiaqiang WANG Tao YANG Shuting Engineering Research Centre for New Power Source Materials of Henan Province Xinxiang 453002 China Engineering Research Centre for New Power Source Materials of Henan Province Xinxiang 453002 China department of Applied Chemistry College of Material Science and Chemical Engineering Zhengzhou Institute of Light Industry Zhengzhou 450002 China Department of Applied Chemistry College of Material Science and Chemical Engineering Zhengzhou Institute of Light Industry Zhengzhou 450002 China Department of Applied Chemistry College of Material Science and Chemical Engineering Zhengzhou Institute of Light Industry Zhengzhou 450002 China Engineering Research Centre for New Power Source Materials of Henan Province Xinxiang 453002 China Department of Chemical Engineering College of Chemistry and Environmental Science Henan Normal University Xinxiang 453007 China

In the search for improved materials for rechargeable lithium batteries, LiFePO4 offers interesting possibilities because of its low raw materials cost, environmental friendliness and safety. The main drawback with using the material is its poor electronic conductivity and this limitation has to be overcome. Here Al-doped LiFePO4/C composite cathode materials were prepared by a polymer-network synthesis technique. Testing of X-ray diffraction, charge-discharge, and cyclic voltammetry were carried out for its performance. Results show that Al-doped LiFePO4/C composite cathode materials have a high initial capacity, good cycle stability and excellent low temperature performance. The electrical conductivity of LiFePO4 material can be obviously improved by doping Al. The better electrochemical performances of Al-doped LiFePO4/C composite cathode materials have a connection with its conductivity.

关键词： lithium ion batteries LiFePO4 doping electrochemical performance

Study and Evaluation in CMOS Full Adders

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Transactions of Tianjin University 2003年第1期9卷 54-57页

作者：陈国章陈昊何丕廉 departmentofComputerScienceandEngineering TianjinInstituteofTechnology departmentofComputerScienceandInformationEngineering TianjinUniversityofScienceandTechnology SchoolofelectronicInformationEngineering TianjinUniversity

Low power adder circuits, SERF, 10T Ⅰ,10T Ⅱ,10T Ⅲ and a complementary adder (2.T) at physical layout level are evaluated. Simulations based on the extracted adder circuit layouts are run to assess how various circuit setups can impact the speed and power consumption. In addition, impacts of output inverters on the circuit performance of modified SERF and 10T adders due to threshold loss problem are also examined. Differences among these adders are addressed and applications of these adders are suggested.

关键词： CMOS full adder 2.T adder

TABULAR TECHNIQUES FOR OR-COINCIDENCE LOGIC

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Journal of electronics(china) 2006年第2期23卷 269-273页

作者： Wang Pengjun Chen Xiexiong institute of Circuits and Systems Ningbo University Ningbo 315211 China department of Information Science and electronic Engineering Zhejiang University Hangzhou 310028 China

The map folding method for the conversion between Boolean expression and COC expansions is analyzed. Based on it, the tabular techniques are proposed for the conversion between Boolean expression and COC expansion and for the derivation of GOC expansions with fixed polarities. The Fast Tabular Technique (FTT) for the conversion from the Boolean expression to the GOC expansion with the required polarity is also proposed. The simulative result shows this FTT is faster than others in references because of its inherent parallelism.

关键词： Tabular technique OR-coincidence logic Fixed polarity OR-coincidence expansion

无线传感器网络的分布式能量有效非均匀成簇算法

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通信学报 2009年第10期30卷 34-43页

作者：尚凤军 Mehran Abolhasan Tadeusz Wysocki 重庆邮电大学计算机科学与技术学院重庆400065 Telecommunications and Information Technology Research institute University of Wollongong department of Computer and electronics Engineering University of Nebraska-Lincoln

研究了现有成簇路由算法,提出了分布式能量有效成簇路由算法,该算法主要包括3.分内容:一是选择候选簇头时通过引入平均能量因子来平衡全网节点的剩余能量情况;二是构造了基于能量和距离的能量消耗率函数以平衡节点的能量效率;三是首次... 详细信息

研究了现有成簇路由算法,提出了分布式能量有效成簇路由算法,该算法主要包括3.分内容:一是选择候选簇头时通过引入平均能量因子来平衡全网节点的剩余能量情况;二是构造了基于能量和距离的能量消耗率函数以平衡节点的能量效率;三是首次提出了基于同构单跳网络的分布式能量有效非均匀成簇路由算法。理论和仿真结果均说明该算法优于EECS,生命周期比EECS延长达到约3.%。

关键词：无线传感器网络非均匀成簇能量消耗率函数同构

A NOVEL METHOD FOR CHARACTERIZING THE WHOLE PROCESS OF POLYMER GELATION

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Chinese Journal of Polymer Science 2001年第4期19卷 335-339页

作者： Qiang Chen Xian-min Zhang Guo-wei Wang Jian Xu State Key Laboratory of Polymer Physics & Chemistry, Center for Molecular Science, institute of Chemistry, Chinese Academy of Sciences Beijing 100080, china {2. of Information & {3. Engineering Zhejiang University, hangzhou 3.002., china Tjanjin Polytechnic University,Tianjin 3.0160 Chinese Acad Sci Ctr Mol Sci State Key Lab Polymer Phys & Chem Beijing 100080 Peoples R China Zhejiang Univ Dept Informat & Elect Engn Hangzhou 310027 Peoples R China

A novel method was established to investigate the gelation process of polymers. The change of refractive index of a polymer system during gelation was determined in situ in a prismatic cell. It can give reliable information on the whole gelation process. The apparatus and the execution of this technique are illustrated and the error is also discussed.

关键词： gelation process in situ technique refractive index

THE NEW SUPER-HIGH-SPEED DIGITAL CIRCUIT BASED ON LINEAR AND-OR GATES

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Journal of electronics(china) 1995年第4期12卷 289-297页

作者：王守觉石寅吴训威金瓯 institute of Semiconductors Academia Sinica Beijing 100083 department of electronic Engineering Hangzhou University Hangzhou 310028

The paper reveals the relation between the linear AND-OR gate and the emitter function logic. With theoretic calculation and PSPICE simulation, the paper proves that the linear AND-OR gates can work at super-high-speed and can be multi-cascaded. On the basis of analyzing the high-speed switch units which coordinate with linear AND-OR gates, two kinds of emitter coupled logic circuits are designed. The paper also discusses the design principles of super-high-speed digital circuits, and some examples of combinational and sequential circuits using linear AND-OR gate are given.

关键词： linear AND-OR gate Super-high-speed digital circuits DYL(Duo Yuan Logic, it means multicell type logic circuits

Detection and parameter estimation of multicomponent LFM signal based on the fractional Fourier transform

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Science in china(Series F) 2004年第2期47卷 184-198页

作者： QI Lin1, 2. TAO Ran1, ZHOU Siyong1 & WANG Yue1 1. department of electronic Engineering, Beijing {2. of Technology, Beijing 100081, china 2. School of Information Engineering, Zhengzhou University, Zhengzhou 450052. china Correspondence should be addressed to QI Lin (email: qilin@***) 1. department of electronic Engineering Beijing Institute of Technology 100081 Beijing China 2. School of Information Engineering Zhengzhou University 450052 Zhengzhou China

This paper presents a new method for the detection and parameter estimation of multicomponent LFM signals based on the fractional Fourier transform. For the optimization in the fractional Fourier domain, an algorithm based on Quasi-Newton method is proposed which consists of two steps of searching, leading to a reduction in computation without loss of accuracy. And for multicomponent signals, we further propose a signal separation technique in the fractional Fourier domain which can effectively suppress the interferences on the detection of the weak components brought by the stronger components. The statistical analysis of the estimate errors is also performed which perfects the method theoretically, and finally, simulation results are provided to show the validity of our method.

关键词： LFM signal parameter estimation fractional Fourier transform.

THE RESEARCH ON TERNARY TTL SCHMITT CIRCUITS

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Journal of electronics(china) 1998年第1期15卷 35-42页

作者： Hang Guoqiang Huang Ruixiang Wu Xunwei (department of electronic Engineering, {2. University, {2. 3.002.)

By analyzing the threshold-jumping of Schmitt circuits, this paper indicates that the core element realizing this function in binary TTL Schmitt circuits is the differential current switch with controllable threshold. Based on the characteristic having two kinds of signal-detection threshold in ternary TTL circuits, a ternary TTL Schmitt circuit having twice reactions of threshold-jumping is designed. The simulation with PSPICE proves that the designed circuit has ideal function of Schmitt circuits.

关键词： Schmitt circuit Multiple-valued logic TTL circuit