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基于文档空间向量距离的查询扩展 被引量:5

Query Expansion Based on Vector Distance in Documents Space
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摘要 查询扩展是信息检索中优化查询的一种有效方法。在分析几种基于互信息的查询扩展方法的基础上,将检索词在文档空间中的距离引入到互信息计算中,提出基于向量距离的改进互信息的查询扩展方法。实验结果表明,该方法能够有效提高信息检索中的查询效果。 Query expansion is an effective method to the queries in information retrieval. After analyzing several methods of query expansion based on mutual information, this paper introduces the vector distance between terms in documents space to the improvement of mutual information and brings forward a query expansion method based on vector distance in documents space. Experimental results show that the method can effectively improve the performance in information retrieval.
出处 《计算机工程》 CAS CSCD 北大核心 2009年第18期54-56,共3页 Computer Engineering
基金 北京工业大学博士科研启动基金资助项目(52007011200703)
关键词 信息检索 查询扩展 互信息 向量距离 information retrieval query expansion mutual information vector distance
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参考文献5

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  • 2Mandala R, Tokunaga T, Tanaka H. Combining Multiple Evidence from Different Types of Thesaurus for Query Expansion[C]//Proc. of the 22nd ACM-SIGIR Conference. [S.l.]: ACM Press, 1999: 191-197.
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