The concept and technology of distributed computing environment are introduced in detail , followed by the introduction of service and function which windows dna provides . the feasibility of applying windows dna to remote fault diagnostic system is discussed and afterwards showed its construction in detail , network security plus 本文详细介绍了分布式计算环境和分布式技术，阐述了windowsdna技术所能提供的服务和功能；探讨了利用windowsdna创建远程信号处理系统的可行性，提出了利用windowsdna技术架构远程诊断信号处理系统的具体方法，展示了系统具有的组成结构，并说明了系统的网络安全性等问题。
Differed from traditional messaging technologies , such as remote method invocation , jms promotes the reliability of asynchronous communication between components in distributed computing environments , and can be used for establishing loosely - coupled messaging system . therefore , it simplifies the development of enterprise applications 相比传统消息传送技术如rmi来说， jms促进了分布式计算环境中各个组件之间可靠的异步通信，可以用来构建松散偶合的消息系统，从而大大简化了企业应用的开发过程。
Distributed computing may resolve effectively the system integration of resources share and interact under different network environments . this paper firstly discusses the environment , architecture and some main realization technology , and then puts forward the valid means of long distance education system based on internet after analyzing demands ^ and characteristics of it . finally , use j2ee technology regulation to realize the system 本文通过对分布式计算环境、架构和几种主流的实现技术进行探讨，结合具体实际情况和远程教育要求与特点，提出基于internet的远程教育系统是发展现代远程教育的有效手段，最后采用sun公司发布的分布式构件模型? ? j2ee技术规范来实现一个基于internet的现代远程教育系统。
The job management system ( jms ) is a vital part of the high - performance computing environment , it provides new mechanisms for submitting , scheduling , running and controlling jobs , it can make full use of all kinds of resources in the network thus can make a kind of high - performance and high - reliability distributed computing environment 作业管理系统是组成高性能计算环境的关键部分，它提供了作业提交、调度、执行及控制的新机制，可以充分利用网络中的各种资源建立一种高性能和高可靠性的分布式计算环境。对作业管理系统进行研究是一件很有意义的工作。
Based on the study of the distributed enterprise manage information system ( mis ) , this thesis sums up the technology of com + , discussed the system frame , principium and technical character , which is related to the fashionable distributed object technology , such as corba , com + , com / dcom and mts . the two - layer application program model and the three - layer model are both analyzed in this thesis . based on the windows dna system frame , which are introduced by microsoft corporation to build the three - layer distributed application program , the thesis gives a new feasible distributed web application system solution scheme , that is the manage system of student status 本文在前人基于internet的分布式企业管理信息系统研究的基础上，总结了com +及其相关技术，对当前流行的分布式对象技术corba 、 com + 、 com / dcom和mts的系统结构、工作原理和技术特点作了深入探讨；分析了两层式和三层式应用程序的结构模型，在对microsoft公司推出的用来建立三层式分布式应用程序的windowsdna的体系结构剖析的前提下，结合windowsdna的三层式应用程序开发特点，利用com +提供的服务，提出了一种在分布式计算环境下开发基于web的应用程序的一种新的灵活可行的解决方案? ?基于com +的分布式web应用系统? ?学籍管理系统。
Since 1990 ' s , distributed computing architecture began to transform into multi - tier from two - tier , and the borderline between client and server is ambiguous increasingly . traditional client / server architecture can not be adapted to distributed computing environments . distributed object technology can solve the problem 进入90年代以后，分布式计算结构开始从两层向多层转化，客户机和服务器之间的界限也日渐模糊。传统的客户/服务器结构已经无法适合于分布式计算环境。
But the increases of application systems are also causing that data interoperations between them was more and more than before , the relationships between them more complex , and these systems being deployed in non homogeneous distributed computing environment . all these aspects are causing the maintenance costs of application systems too much high , the enterprises slowly meeting requirements of customers , and the couplings between systems too much strong 但是,随着应用系统的增加,各个应用系统之间需要的数据互操作愈来愈多,系统之间的关系愈来愈复杂,而且企业计算环境通常是异构分布式计算环境,这造成了整个企业的管理信息系统的维护成本增加、应对复杂多变的应用需求滞后、各个应用系统之间的耦合性强、鲁棒性差等缺点。
Well - developed , the client / server application pattern , three - layer or multi - layer and a middleware technology in recent years are the key technologies to meet application requirements , such as interactivity and portability of heterogeneous hardware and software platforms , completeness , scalability , reliability , interactivity and safety of application system transaction 近几年业已发展成熟的三层或多层客户机服务器应用模式和中间件技术正是解决分布式计算环境下异构的硬件平台和软件平台的互操作性及可移植性的关键技术，同时解决了应用系统交易完整性、可伸缩性、可靠性、互用性、安全性等应用需求。
The article exposes the grid gis structure , with the study of criterion of international open gis consortium and other standardized organization , analyze the structure of grid gis and the category of space information services ; under the system framework of middleware , the article put forward the grid gis software framework , and analyzes the technology of distributed computation and component gis ; according to the key study of grid gis integration in different distributed computation environment , the article advances grid gis software system structure that suitable to the distributed information integration platform ; based on the study of interoperation of distributed grid gis component and the integration technology of gis and model in multiple tier computation framework , the article puts forward and designs the integration method of gis and model in grid environment 本文剖析了网格体系结构，结合国际标准化组织关于gridgis及相关的规范的研究，分析了gridgis服务组成结构和其空间信息服务类型；在中间件技术的架构下，提出gridgis软件总线架构，并分析了gridgis组件可能采用的分布式计算技术和组件gis技术；通过不同分布式计算环境下面向应用的gridgis集成关键技术的研究，提出适合于分布式信息集成平台的gridgis软件架构；基于分布式gridgis组件互操作技术的研究，结合多层体系结构下gis和模型集成技术的研究，提出并设计网格环境下gis和模型集成的方案。
Intrusion detection is an essential component of critical infrastructure protection mechanisms . nowdays , with the development of computer and network technologies , the wide adoption of distributed computing environment , and the recent appearance of distributed denial - of - service ( ddos ) attacks , traditional centralized intrusion detection systems , which only concern their local network environments or a single host , are proved to be not sufficient 随着计算机和网络的不断发展，分布式计算环境的广泛采用，以及internet上分布式协作攻击的频繁出现，传统的基于单机的集中式入侵检测系统已经不能够满足系统的安全需求，应运而生的分布式入侵检测技术逐渐成为入侵检测领域的研究热点之一。
