%0 Journal Article
%T Query expansion based on local classification analysis<br>基于局部类别分析的查询扩展
%A FENG Yun
%A CHEN Zhi-Ping
%A <br>冯运
%A 陈治平
%J 计算机应用
%D 2007
%I 
%X To solve the problem that local analysis for query expansion gets low precision in information retrieval,a new method was proposed.It analyzed the top-ranked documents retrieved for an original query,and inferred the possible classifications related to the query,then utilized co-occurrence with the query terms in the related classifications to expand the query.Experimental results indicate that the new method costs less retrieval time and gets higher precision compared with traditional methods such as global analysis and local analysis.
%K information retrieval
%K query expansion
%K local analysis
%K co-occurrence<br>信息检索
%K 查询扩展
%K 局部分析
%K 词共现
%K 局部
%K 类别分析
%K 查询扩展
%K analysis
%K classification
%K local
%K based
%K expansion
%K 检索速度
%K 结果
%K 实验对比
%K 全局分析
%K 共现关系
%K 用词
%K 文档
%K 相关
%K 用户查询
%K 算法
%K 查准率
%K 方法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=831E194C147C78FAAFCC50BC7ADD1732&aid=7EB4F89C56892AD686CB1EBC1C3CEBDE&yid=A732AF04DDA03BB3&vid=DB817633AA4F79B9&iid=CA4FD0336C81A37A&sid=334E2BB8B9A55ABB&eid=79D2EF35F60110C2&journal_id=1001-9081&journal_name=计算机应用&referenced_num=0&reference_num=6