The Design And Implementation Of Meta Search Engine Based On Ontology Technology XXYJ System

With the rapid development of Internet, the information resources on Internet increase sharply. In order to find useful information from the vast data, search engine emerges and develops fast as a major tool of Internet information retrieval. However, any search engine can not cover all the Internet information. According to related statistics, the information coverage rate of some famous search engines is at most 30 percent. Internet users usually have to retrieve several search engines to retain a more comprehensive effect. To make a full and effective use of available information resources and reduce relative investment, people start to pay special attention to Meta Search Engine.The thesis starts from the concept of Meta Search Engine and ontology and introduces ontology to Meta Search Engine system. Aiming at the improvement of recall and accuracy, the thesis puts forward the Meta Search Engine Based on Ontology Technology——XXYJ System, and illustrates the specific implementation in detail.Building up search engine parameter database realizes the transform from retrieval requests to target search orders, and the automatic extract of related contents. The design of a managing system of search engine simplifies the addition and management of target search engine. Through the ontology of information technology field, the system can expanding the search key words, enhance the recall of information retrieval. At the same time, the thesis makes research on the result sequence algorithm and provides an improved abstract sequence algorithm. It gives some practical examples and analyzes the performance of the system. In the last part, the thesis summarizes the present study and suggests the next task.