高技术通讯（英文版）2008，Vol.14Issue(1)：77-80,4.
A new approach to query expansion in information retrieval
A new approach to query expansion in information retrieval
摘要
Abstract
To eliminate the mismatch between words of relevant documents and user's query and more serious negative effects it has on the performance of information retrieval,a method of query expansion on the basis of new terms co-occurrence representation was put forward by analyzing the process of producing query. The expansion terms were selected according to their correlation to the whole query. At the same time, the position information between terms were considered. The experimental result on test retrieval conference (TREC) data collection shows that the method proposed in the paper has made an improvement of 5%～19% all the time than the language modeling method without expansion. Compared to the popular approach of query expansion, pseudo feedback, the precision of the proposed method is competitive.关键词
information retrieval, language model, query expansionKey words
information retrieval, language model, query expansion分类
信息技术与安全科学引用本文复制引用
Li Weijiang,Zhao Tiejun,Wang Xiangang..A new approach to query expansion in information retrieval[J].高技术通讯（英文版）,2008,14(1):77-80,4.基金项目
Supported by the High Technology Research and Development Program of China (No. 2006AA01Z150) and the National Natural Science Foundation of China (No. 60435020). （No. 2006AA01Z150）
