Construction of user ontology and its application in personalized retrieval

To let users easily and correctly find the correct information they want from the Internet where the information is numerous and jumbled, on the basis of traditional retrieval technique, the concept of user ontology in personalized retrieval was proposed in combination with the research of ontology and personalized retrieval technique. The construction and maintenance of user profile based on behavior was introduced. And the extraction rules of semantic relations were discussed in detail. The method of constructing the user ontology was given based on the discussions. Finally,the availability of using user ontology in personalized retrieval was shown by a comparative experiment.