Being the composition search device which the composition search device, the composition search method, the composition search

摘要

PROBLEM TO BE SOLVED: To achieve a query expansion enabling the significant improvement in retrieval precision through a less number of expansion words, by accurately specifying a site with access concentrated thereon by analyzing click logs.;SOLUTION: Analysis unit (A) 123 and analysis unit (B) 124 of a sentence retrieval device 1 analyze a click log DB 126 that is a history of events in which a site has been clicked by using an inputted query. An analysis result integration unit 122 specifies a site with access concentrated thereon from the analysis results from both the analysis units (A) 123, (B) 124. Information extraction unit 128 extracts a title and an abstract of the site with the access concentrated thereon. An expansion word selection unit 120 selects an expansion word for use in retrieval from the extracted title and the abstract. A retrieval execution unit 140 performs retrieval by using the expansion word and the query and outputs the retrieval result.;COPYRIGHT: (C)2010,JPO&INPIT