ROBUST DISSIPATIVE CONTROL FOR STATE-DELAYED SYSTEMS WITH DISSIPATIVE UNCERTAINTY

Introduction　　Since notion of a dissipative dynamical systemwas introduced by Willems[1] ,it has played a veryimportant role in system,circuit,network andcontrol engineering and theory.Dissipativeness isa generalization of the passivity in electrical net-works and other dynamical systems which dissipateenergy in some abstractsense.Applications of dis-sipativeness in the stability analysis of linear sys-tems with certain nonlinearfeedback were firstdis-cussed in Refs.[1 ,2 ]. The theory of d…     

关于我国铁路改革的基本构想

从宏观角度分析了我国铁路现行体制上存在的弊端。根据我国建立社会主义市场经济体制的总要求，指出了我国铁路改革的总体目标，阐明了我 国铁路改革在政企分开，企业重构，市场经营以及投资体制，财务体制等方面的改革内容和着力点以及我国铁路改革的基本思路和框架。     

大力发展现代物流下的多式联运

全球经济的发展和市场竞争的加剧,加大了企业对物流的重视,促进了多式联运的发展。本文通过论述现代物流和多式联运的关系,以及相应的信息技术,提出了现阶段多式联运发展的几点建议。     

Applicability of highway alignment optimization models

This paper presents an intelligent optimization tool that assists planners and designers in finding preferable highway alignments, connecting specified endpoints or zones. It integrates genetic algorithms with a geographic information system (GIS) for optimizing highway alignments and processes massive amounts of relevant data associated with highway design and alternative evaluation. To show the applicability of the proposed model to a real-world problem, two actual highway projects in the state of Maryland have been analyzed using the model. An extensive analysis of sensitivity to key model parameters is also conducted to describe the model capabilities. The analysis results show that the model can effectively optimize highway alignments in an area combining complex terrain and various types of natural and cultural land-use patterns, and provide detailed information of optimized alignments as a model output. It is also found that the alignments optimized by the model are quite similar to those obtained through conventional manual methods by a state agency, but the model can greatly reduce the time required for highway planning and design as well as produce lower cost solutions. Finally, the results confirm that all dominating and alignment-sensitive costs should be simultaneously evaluated in the alignment optimization process because many trade-off opportunities exist among those costs. The proposed model can greatly contribute to the productivity of highway planners as well as to the quality of the resulting infrastructure.     

�����ۺϽ�ͨ����������̬����Ļ����о�����

以城市交通、物流和生态系统的综合发展为切入点,讨论有关城市科学化发展中的若干基础科学问题,特别是在对以前的工作予以客观的归纳、分析、开拓与利用的基础上,从更广的科学范围和更深的技术层次,以多学科、跨领域、综合型的研究方式探讨解决这些科学问题的有效方案.     

�Ϻ����ܽ�ͨ��չս�Ե��о�

针对上海新一轮大发展,从5个方面对智能交通提出需要,介绍了上海智能交 通建设的目标:建成城市交通信息共享平台,成为华东地区乃至全国交通信息汇聚中心之一,城市交通管理达到发达国家先进水平.该目标分近期、中期、远期分段设定.因此,上海市将实施建设交通信息中心和上海智能交通工程研究中心等10大工程项目.     

基于回波空间特性的潜艇目标识别研究

本文阐述了基于波束分裂的互谱法定向理论,给出了水下体目标的亮点模型.在此基础上,提出了一种利用体目标回波的空间方位分布信息识别水下目标的方法.通过对亮点模型目标回波的方位角和俯仰角进行估计,估算出目标的线性尺度,实现体目标的识别,最后通过计算机仿真给出了估计量的估计方差并进行了相应的分析.     

船舶结构分布式测量系统及其模型

基于船舶挠性结构变形测量的现状、捷联惯导系统的应用现状和目前光纤布拉格传感器可复合使用、波长编码的独特优点,本文提出采用捷联惯导系统与分布式光纤布拉格光栅组成对船舶结构进行变形测量和健康监测的设计方案,分析了可行性,并建立了由捷联惯性系统和光纤布拉格传感器组成的光电多传感器初步测量模型.