Research And Design Of Flexible Personalized Internet Service System

For dealing with the problem how to satisfy different user requirements and adapt the changing environment in personalized information service, the deep analysis of the research inside china and abroad are made, and some key problems in this area are studied.Firstly, the architecture of flexible software is presented based on the analysis of the characters, administrative levels, applied range and representation of flexible software.Secondly, under the guidance of flexible software theory, the model of flexible personalized information service platform is designed. The three-tier service architecture, which is consists of three steps that is delivery system, terminal system and LAN publishing system is built. The function in each module can be adjusted dynamically.Thirdly, the delivery system is presented which is consists of producer, consumer, manage node, filtering node, caher node and broadcasting node.The inner structure and collaboration principle of information ordering and publishing between different nodes are designed in the delivery process.Finally, the LAN publishing system is conceived which is consists of LAN server, broadcasting channel, sharing information flow, user Agent and information Agent. The terminal system is built which is consists of user Agent, filtering and LAN information database. The idea of data flexibility is expatiated based on MPEG-7 standard and topic.