Research And Application Of Search Engine Basedon Temporal Information Of Coal Mine Safety

In recent years, the coal mine accidents occurred many times make the state property losses, the people’s life safety is threatened. Coal mine safety problem has widespread attention in society. The Internet as the carrier of information in today’s world, a lot of coal mine safety event will get updates and reports in a timely manner. In the face of such a huge information resources treasure, search engine provides people with access to the information resources of the entrance. But because of the specialization and the amount of information on the Internet in the field of exponentially, using the current mainstream of general search engine, the returned result already can’t satisfy people’s needs. So the design of coal mine safety event oriented topic search engine is very necessary. The search engine can not only enhance security awareness in the process of people in the daily production, can also provide reference for people at the time of the accident and solutions, more important is to meet the demand for this specialized information retrieval field.The temporal information of coal mine safety is an important element of events, tend to be a focus of attention. Retrieval of temporal information retrieval is a very, very common in the field of coal mine safety. Such as query "the recent coal mine accidents this month," the general search engine query result is not can provide users with the appropriate information. If you can, therefore, in the face of coal mine safety events introducing temporal information retrieval in the theme of the search engine to enhance the efficiency of search engine, user can express temporal query requirements, can effectively improve the performance of search engine.The thesis based on the temporal information of coal mine sa fety event search engine has carried out a number of key technology research, probes into the web page content and theme of correlation discriminant method, subject indexing model, and other issues.In this paper, the main contribution can be summarized a s:(1) through the analysis of the content of its topic and subject in the library subject of key characteristics, puts forward and implements the web topic correlation discriminant method.(2) according to the search engine’s thematic, tense and index maintenance needs a index model is designed.(3) based on the previous research results, was designed and implemented based on the temporal information of coal mine safety event search engine.