Matching and Tracking Technique Based on Time Frequency Dictionary

With the change of internet technology and the coming of information explosion, the mass of information can meet the needs of people searching in a certain extent. But it also caused information loss and spread etc.. The traditional solution is using keyword query of search engine to realize information, the information classified. But this method is based on the hot information of mass, it doesn't have certain timeliness. Based on this, this paper improves TFIDF model, put forward Web high precision matching tracking technique based on time frequency. It can carry out a full range of filtration for web information, is simple and effective to search the information which the customer need, with a high timeliness. It provides a theoretical basis for the research of web information filtering system.