Study Of Key Technologies In The Development Of Distributed Distance Education Platform And Intelligent Community Platform

This paper is based on the research work of development of Platform of Intelligent Community and development of Distance Education Platform. The author put forward and realized the following innovative research ideas on several key problems during the development. First, due to the speciality of Intelligent Community and Distance Education that the platforms not only provide Web service, but also provide other services such as video service, and whaty is more, the scability of platform is of great importance for the huge end-user accesses, the author put forward the method of adopting distributed clustering servers. After intensive study of knowledge of Distributed Systems and analysis of comparable products, the author realized the set-up of clustering servers under Linux, and developed relative softwares that can be used to monitor and manage clustering servers.Second, Intelligent Community needs broadband network service, which makes the author to bring about innovative idea of Content-based Search Engine and Intelligent Cache Agent. After searching and studying relative materials inland and abroad, the author finished initial research work of Conent-based Search Engine and realized Intelligent Cache Agent. However, content-based search engine is a new idea, and is limited by difficulty of Literal Explicit of Chinese Words and irregularity of protocal of HTML, the advanced research work is still on its way to successful resolvment.Third, based on realistic requirement and needs, the author resolved several key problems in the development of Distance Education Platform. The author adopted technology of Self-adaptive Multimedia Stream, synchronized and unsynchronied information communications and stream-based compression. Moreover, the author implemented automatic transmissions of different language Char-codes and authenticity and protection of network resource.Finally, the author studied how to make development of Platform more transplantable and more modularized. The author adopted the more and morepopular XML techonology and dissucused how to develope platfor with the joint of XML and JSP, especially on how to resolve the data-sharing among hetero-structured DBMSs.Through research work and realization of above key technologies, the author finished the development of Intelligent Community platform and Distance Education platform. The Distance Education platform was formally identified by expert group organized by Science & Technology Committee, Beijing Municipal Government, and was given high evaluation. It was on its services to above 8 universities in China till now.