TSINGHUA SCIENCE AND TECHNOLOGY
1999, Vol. 4, No.4

Universal Adaptive Observer for Nonlinear Time-varying Deterministic Systems�?�?ZHOU Donghua, JIN Yihui(1597-1601)
Point-pattern Matching Using Irreducible Matrix and Relative Invariant�?�?ZHANG Lihua�?XU Wenli(1602-1605)
A New Framework for Intranet-based Group Decision Support System�?�?ZHUO Yue, WANG Hong，WU Qiufeng，et al(1606-1609)
Fuzzy Adaptive Variable Structure Guidance with Application to Space Interception�?�?ZHOU Di, MU Chundi, XU Wenli(1610-1614)
Dynamic Classifier Combination Method Based on Minimum Cost Criterion�?�?ZHENG Jing, DING Xiaoqing, WU Youshou(1615-1619)
Request Dispatching Algorithms for Web Server Clusters Based on Load Balancing�?�?DI Shuo，ZHENG Weimin(1620-1623)
Dispersion Compensation of 50 km SMF Optical Transmission Systems with a Linearly Chirped Fiber Grating�?�?MAO Weiming, SUN Chengcheng, XIE Shizhong, et al(1624-1627)
Progressive Failure Simulation for Damaged Composite Laminates Using Nonlinear Finite Element Method�?�?XU Chengdong�?ZHANG Hui,SUN Jiaguang,et al(1628-1631)
An Integrated Application of Neural Network, Fuzzy and Expert Systems for Machining Operation Sequencing�?�?BERNARD S.M., WANG Xiankui,LIU Chengying(1632-1637)

²³³U Breeding in Accelerator-driven Sub-critical Fast Reactor�?�?YANG Yongwei, H.Takahashi,AN Yu(1638-1641)
Optimal Treatment Cost Allocation Methods in Pollution Control�?�?CHEN Wenying, FANG Dong,XUE Dazhi(1642-1646)
Completeness of the Higher Order Harmonics�?�?LI Fu, LUO Zhengpei,WANG Yaqi(1647-1651)
R&D and Reliability Analysis of a Digital Protection System for Nuclear Heating Reactors�?�?SHI Mingde, Li Duo,MA Changwen,et al(1652-1655)
A Multi-purpose Electro-heat Cogeneration Plant�?�?MA Changwen(1656-1660)
Dynamic Model for the Control System Simulation and Design of a 200 MW Nuclear Heating Reactor�?�?ZHANG Yuai, LIU Longzhi,MA Changwen(1661-1665)
Licensing of the Construction Permit of the NHR-200�?�?ZHANG Yajun, LI Huaixuan(1666-1671)

Numerical Calculation of Flows in Turbomachinery with Three-dimensional Viscous Codes�?�?ZHU Wei,YANG Ce,JIANG Zikang,et al(1672-1677)
Numerical Investigation of a High-speed Centrifugal Compressor Impeller�?�?YANG Ce，LI Zhigang, JIANG Zikang, et al(1678-1682)
Future Applications of Power Plant Simulators—�?�Total Plant Solution System�?�?XIE Maoqing,REN Tingjin,YAN Dezhong,et al(1683-1687)
Full-function Numerical Method for Flow over a Self-) excited Vibrating Body�?�?CHEN Zuoyi,LIU Hong, WU Xiaofeng(1688-1691)

Analysis of Passivity and Disturbance Attenuation for a Class of Power Systems�?�?MEI Shengwei, LI Xiong,LU Qiang,et a(1692-1694)
Observation of the Metallic Vapor from a Plasma Focus�?�?WANG Xinxin, YANG Jinji(1695-1697)
Calculation of Three-dimensional Electrostatic Field in Potential Transformers�?�?ZHANG Liping,YUAN Jiansheng,LI Zhongxin(1698-1700)
Feedback Linearization H_{�?/sub> Control and Its Application to Excitation Systems}�?�?MEI Shengwei,LI Xiong,LU Qiang,et al(1701-1706)

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