Based On The Theme Of The Search Engine Of The Mobile Agent

As information technology developing in a high speed, the total amount of information also experiences expanding, Internet has now becoming a necessary way for people to obtain information. Universal search engine has enable people to retrieve information from Internet in a more easy way, however, due to high speed development of technology and increased amount of information, more requirements has been brought forward on search engine, and focused search engine is one of which people desired. Focused web search technology can be obtained to use abundant web resource in a efficient way in which topic resource repository can be constructed depend on automatic process of topic information. As a result, the efficiency and quality of information retrieval can be improved.In this paper, we firstly analyzed the development of search engine, described the implement of each part of search engine, based on this, investigated the background of research on focused search engine, analyzed the reasons of why research on focused search technology is booming, and evaluated the potential value of focused search. On the basis of reading a lot of references, introduced some typical focused search engine project. Analyzed many important technologies used in focused search that include: the conception of topic, the technologies of finding topic resource, the construction of focused crawler, heuristic strategies of focused crawling and related algorithms, discussed the connotation and the extension of focused search. According to the features of focused search engine and mobile agent technology, a method that use mobile agent works on remote host to retrieve topic information has been brought forward. Discussed how this method can improve the performance of focused crawling, especially at the aspect of reduce the cost of network bandwidth. Brought forward a prototype of mobile agent based focused search engine, and described each part of the system.