Research On The Customized Active Information Push Technology

With the development and application of Internet technology and computer technology, at the same time, with the open property of the Internet technology, it causes the explosion increment of the information resource on Internet. And it is more and more difficult for people to get information from the Internet. Coping with this situation, it brings the Search Engine technology into the world, and gets rapid development. Search Engine keeps on accessing website, establishing and completing the index database of keywords to URL. And then the user inputs the keywords to express his demands, and pulls the relevant information from the index database. During the process, there are some problems. To solve these problems, the coming information service system development direction is push technology opposite to the pull technology. The push technology changes the user's mode to get network information. But in the modern society full with individualization, everyone desires for individualized service mode, so customized active information push technology is a meaningful research subject.First of all, this thesis introduces the research and development situation of information retrieval technology. And then, it introduces and analyzes some relevant knowledge and technologies, including Agent technology, information acquisition technology, user's interesting mining technology, the evaluation criterion of active information push technology, and the object, system architecture, system fine structure, and the evaluation of the customized active information push system.The acquisition of user's interesting knowledge is the prior condition and foundation of the customized information retrieval. The thesis analyzes the resources of user's interesting knowledge, and explicates the extraction, modification of the user's interesting, especially a new method-"question-and answer"method, applied in the system, in order to solve the problem of the acquisition of user's interesting knowledge. Every kind system has its own evaluation criterion, the paper has two parts to evaluate the system. First of all, it is the evaluation of search result, including recall, precision and recall-precision curve. And then, it establishes a push system mode, and from this mode, it derivatives the formula of information useful extent, information useless extent and active push extent.A customized active push experimental system is designed and realized. The thesis explicates the realize technology, and evaluates the system.The research provides reference solution about customized active push technology on the network.