基于嵌入式计算机和Ethernet的分布式波控系统

介绍一种基于嵌入式计算机和以太网(Ethernet)的相控阵雷达分布式波控系统。整个波控系统以数个嵌入式计算机为核心，通过以太网与雷达的控制计算机通讯。     

固定化酵母粒子中生产乙醇的定态分岔行为研究

运用变分原理和打靶法将分布参数系统的非线性边值问题转化为集总参数系统的初值问题，基于延拓算法，研究了固定床中球形固定化酵母粒子表面乙醇和葡萄糖浓度随参数的变化关系，得出了单颗粒固定化酵母生产乙醇的多定态特性。结果表明：随系统尺度三的变化，方程出现分岔点；方程的解与液相主体浓度有关。在某些条件下酵母粒子表面浓度有三个定态：在多定态区域，随三的增加，方程一个解支的乙醇浓度迅速增加，从而可以在固定床中通过控制粒径而使反应器达到较高的产率。研究结果为固定床反应器的开工及控制提供了重要的理论依据。     

GD3000型变电站远程监控系统的开发与应用

针对中国电力系统发展的实际需要，开发并应用了GD3000型变电站远程监控系统，本系统为远程管理提供帮助，使之能安全可靠地应用于无人值守变电站中。该系统采用新的开放式模块、分布式处理的概念，可广泛用于电力系统的无人站及各种信息采集的场合。     

Key processing with control vectors

A method is presented for controlling cryptographic key usage based on control vectors. Each cryptographic key has an associated control vector that defines the permitted uses of the key within the cryptographic system. At key generation, the control vector is cryptographically coupled to the key by way of a special encryption process. Each encrypted key and control vector are stored and distributed within the cryptographic system as a single token. Decryption of a key requires respecification of the control vector. As part of the decryption process, the cryptographic hardware verifies that the requested use of the key is authorized by the control vector. This article focuses mainly on the use of control vectors in cryptosystems based on the Data Encryption Algorithm.     

Development of cable fault location method using fiber optic distributed temperature sensor

When ground-fault problems occur on a cable line, immediate fault location and restoration are required. Therefore, various new methods to locate the fault point instantaneously have been investigated to replace such conventional methods as the Murray loop method and the pulse radar method [1]. These methods require a long time to locate the fault point. One possible fault location method is to sense the temperature rise following a ground fault using a fiber optic distributed temperature sensor. Application of this method was found feasible through sensing the temperature rise at a ground-fault test using a thermocouple as a temperature sensor with test cables [4]. A power/optical composite cable was prepared experimentally and after verifying its thermal mechanical performance, the temperature rise at an incidence of a fault was determined and the anticipated performance was demonstrated in a ground-fault test. This article describes the outline of the test.     

Distributed Speech Recognition Systems and Some Key Factors Affecting It''''s Performance

1　IntroductionWiththerapiddevelopmentofInternetandmobilecommunications,theresearchonwirelessmobilenetworkshasbecomethenewhotspotinin formationtechnologyfield .Asweknow ,mobileterminals (mobilephone,forexample)arethetooltohelppeopletoaccessanyinformationtheyneedbyanymediaatanytimeandanywhere .However,itissometimesdifficultformobileterminalstoplaysucharolebecauseofthelimitationssuchaslimitedca pacity ,lowpower,andinconvenienceinoperating .So,peoplehopetofindanotherwaytoaccessnet workinformatio…     

中医药虚拟数据分析中心构建方法

分析了我国中医药数据分析作业方式的不足,试图通过建立网络数据分析中心,为中医药部门提供了一条实现网络化,标准化,信息化的思路.     

支持专业知识获取的中间件的研究

 分析了如何利用中间件技术支持专业知识获取的问题．提出了基于XML，SOAP，UDDI和WSDL的web服务技术的专业知识获取的中间件应用模式，它可以有效解决消息传送、服务功能的抽象描述以及服务在网络上的发布与发现等问题。以固定瓦推力滑动轴承的性能参数计算Web服务为实例，指出web服务是分布式设计知识获取和知识资源集成的有效途径．     

基于移动代理的分布式网络管理研究

随着网络的迅猛发展，管理网技术的相关研究也越来越得到广泛重视，传统的集中式管理方法在可扩展性、可靠性、灵活性方面存在一定的不足。基于移动代理的分布式网络管理方案可以很好地解决这些问题。网管站派遣移动代理到各被管节点上去收集数据和执行网管操作，这样可以分散网络管理站的工作量和降低网络的流量，并提升网络管理系统的主动性。