基于连续流程企业产品供应链的CIMS体系结构设计研究

企业集成是ＣＩＭＳ开发与设计的主要目标之一。如何有效地利用现有的各种先进技术实现相关企业的软硬件集成是实现企业集成的重要途径。该文认为对连续流程企业ＣＩＭＳ的体系结构可以考虑从纵向和横向两个方面进行研究。以纵向的观点,认为所有相关企业是由一条产品供应链动态或静态地连接在一起,其中每一个企业是前一个企业的产品销售单位,同时又是下一个企业的原料供应单位,产品供应链是一个有向网络图,企业集成的分布式网络环境的建立可以参照该图进行构造;以横向的观点,认为建立在产品供应链上的各企业的信息集成可以通过计算机协同工作技术、人工智能技术、数据库技术等实现,它随产品供应链的变化而变化,认为产品供应链上的每一个企业均是虚拟企业,它们均可以以计算机可以识别的信息进行描述与表示,企业的集成实际上就是这样一些信息在企业内部及产品供应链上（企业之间）进行动态或静态的数据集成。文章在此基础上针对连续流程企业分别讨论了软硬件环境、数据库设计、系统集成框架、供应链任务协同等相关技术的设计与实现方法。     

面向对象技术在电信综合网管中的应用

论述了面向对象技术方法,以及如何在分析和设计电信综合网络管理中应用。     

Evolutionary Computation in Structural Design

The paper provides the results of preliminary research on the application of evolutionary computation to integrated structural design in which a complex design support tool automatically conducts both conceptual and detailed design. In the paper, a brief overview of the state of the art in evolutionary computation and its applications to structural design is provided. Next, Inventor 2000 is described, a unique research and structural design tool developed by the authors at George Mason University that combines an evolutionary computation component with a system for wind forces analysis, and a system for the analysis, design and optimisation of steel structures. The paper also presents the results of four structural design experiments conducted with Inventor 2000. The objective of experiments was to investigate various forms of evolutionary computation as applied to structure design. Finally, the paper provides the initial research conclusions and recommendations for further research.     

飞行／推进综合控制系统设计与仿真

飞机飞行控制系统与推进系统间有很强的耦合作用,单独设计和发动机控制系统已不能满足需要。该文在单4独研究外部干扰对飞行性能和发动机性能的影响的基础上,根据他们相互的关系,建立了飞行／推进系统一体化数学模型,并在此基础上进行了综合控制设计,对所建的模型进行了仿真,结果表明飞机飞行状态和发动机的工作确实有很强的耦合,同时本文所设计的飞行／推进综合控制系统具有优良的性能。     

Decoupled approach to integrated optimum design of structures and robust control systems

Integrated optimum design of structures and control systems is studied by using H ₂ and robust control formulations. It is derived that conventional simultaneous optimization approach by using these robust control laws can be approximated by a decoupled optimization approach in which the structures are optimized by shaping the structural singular values and then the controllers can be designed, namely, decoupled, sequential or successive design approach. It is shown that the proposed decoupled optimization approach can be used to design optimum robust structures and has certain advantages over the conventional simultaneous optimization procedures such as it avoids the drawbacks of pure robust control laws and faster, especially if the number of degrees of freedom (DOF) of the associated structure is large. The bounds for achievable robustness measures are also obtained. Following, simultaneous and decoupled optimization approaches are applied to active control of two structures. The optimization results are presented, and it is concluded that the proposed decoupled optimization approach yields the achieved global minimum much faster than the simultaneous optimization approach.     

Optofluidic waveguides: II. Fabrication and structures

We review fabrication methods and common structures for optofluidic waveguides, defined as structures capable of optical confinement and transmission through fluid filled cores. Cited structures include those based on total internal reflection, metallic coatings, and interference based confinement. Configurations include optical fibers and waveguides fabricated on flat substrates (integrated waveguides). Some examples of optofluidic waveguides that are included in this review are Photonic Crystal Fibers (PCFs) and two-dimensional photonic crystal arrays, Bragg fibers and waveguides, and Anti Resonant Reflecting Optical Waveguides (ARROWs). An emphasis is placed on integrated ARROWs fabricated using a thin-film deposition process, which illustrates how optofluidic waveguides can be combined with other microfluidic elements in the creation of lab-on-a-chip devices.     

基于智能优化控制的磨矿过程综合自动化系统

本文首先概述了磨矿的工艺过程和控制要求,然后从系统结构与功能、智能优化控制策略等方面详细描述了磨矿过程综合自动化系统,最后谈到该系统的实施及应用效果。     

CDMA网络中的综合业务接入策略*

为了解决CDMA网络中综合业务的协调传输问题,提出了资源竞争的策略。通过非实时类业务和实时类业务的分析,在考虑业务群体的Logistic变化规律的基础上,以总体QoS效果为追求目标,推导出竞争平衡方程。实验表明了该模型能够提高系统的整体容量。     

对象管理系统

对象管理系统（Ｏｂｊｅｃｔ 　Ｍａｎａｇｅｍｅｎｔ Ｓｙｓｔｅｍ,ＯＭＳ）是集成化软件工程环境的核心和纽带,它以统一的方式管理各种对象（Ｏｂｊｅｃｔ）。文章提出了一种ＯＭＳ模型,即对象－关系－属性（ＯＲＡ）模型,并介绍了相应的对象库结构及其服务设施。