情报杂志2016，Vol.35Issue(12)：105-110,6.DOI:10.3969/j.issn.1002-1965.2016.12.019
基于叙词表语义关系和PageRank的查询扩展方法
An Approach for Query Expansion Based on Semantic Relation of Thesaurus and PageRank
摘要
Abstract
Purpose/Significance] Query expansion is a method for improving the index of recall and precision of information retrieval, and has always been the focus of many researchers. [ Method/Process] In this paper, we propose an approach for query expansion based on semantic relation of thesaurus and PageRank. At first, it obtains an initial query expansion set for an original query word using thesau-rus, and constructs an initial conceptual tree of query expansion based on the semantic relation between words in thesaurus;secondly, we exploit Modified PageRank to measure the importance MPR of each node in initial conceptual tree of query expansion, and prune the con-ceptual tree by an empirical threshold;finally, a final word set of query expansion is obtained. [ Result/Conclusion] Experimental results show that the method proposed in this paper can improve the index of recall and precision of information retrieval, and average F-measure is promoted in a certain scope and increases 5. 59% in contrast to the method of no query expansion, the method shows great competive-ness.关键词
语义关系/PageRank/查询扩展/叙词表/概念树Key words
semantic relation/PageRank/query expansion/thesaurus/concept tree分类
社会科学引用本文复制引用
何伟,常春..基于叙词表语义关系和PageRank的查询扩展方法[J].情报杂志,2016,35(12):105-110,6.基金项目
中国博士后科学基金项目“基于叙词表语义关系的智能检索模型研究”(编号:2014M550791)研究成果之一。 （编号:2014M550791）
