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语义查询扩展中词语-概念相关度的计算
引用本文:田 萱,杜小勇,李海华.语义查询扩展中词语-概念相关度的计算[J].软件学报,2008,19(8):2043-2053.
作者姓名:田 萱  杜小勇  李海华
作者单位:1. 教育部数据工程与知识工程重点实验室,北京,100872;中国人民大学,信息学院,北京,100872;北京林业大学,信息学院,北京,100083
2. 教育部数据工程与知识工程重点实验室,北京,100872;中国人民大学,信息学院,北京,100872
基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.60496325, 60573092 (国家自然科学基金)
摘    要:在基于语义的查询扩展中,为了找到描述查询需求语义的相关概念,词语.概念相关度的计算是语义查询扩展中的关键一步.针对词语.概念相关度的计算,提出一种K2CM(keyword to concept method)方法.K2CM方法从词语.文档.概念所属程度和词语.概念共现程度两个方面来计算词语.概念相关度问语.文档.概念所属程度来源于标注的文档集中词语对概念的所属关系,即词语出现在若干文档中而文档被标注了若干概念.词语.概念共现程度是在词语概念对的共现性基础上增加了词语概念对的文本距离和文档分布特征的考虑.3种不同类型数据集上的语义检索实验结果表明,与传统方法相比,基于K2CM的语义查询扩展可以提高查询效果.

关 键 词:语义查询扩展  概念  本体  词语-概念相关度
收稿时间:2007/2/14 0:00:00
修稿时间:2007/8/24 0:00:00

Computing Term-Concept Association in Semantic-Based Query Expansion
TIAN Xuan,DU Xiao-Yong and LI Hai-Hua.Computing Term-Concept Association in Semantic-Based Query Expansion[J].Journal of Software,2008,19(8):2043-2053.
Authors:TIAN Xuan  DU Xiao-Yong and LI Hai-Hua
Abstract:In semantic-based query expansion,computing term-concept association is a key step in finding associated concepts to describe the needed query.A method called K2CM (keyword to concept method) is proposed to compute the term-concept association.In K2CM,the attaching relationship among term,document and concept together with term-concept co-occurrence relationship are introduced to compute term-concept association.The attaching relationship derives fi'om the fact that a term is attached to some concepts in annotated corpus,where a term is in some documents and the documents are labeled with some concepts.For term-concept co-occurrence relationship,it is enhanced by the text distance and the distribution feature of term-concept pair in corpus. Experimental results of semantic-based search on three different corpuses show that compared with classical methods,semantic-based query expansion on the basis of K2CM can improve search effectiveness.
Keywords:semantic-based query expansion  concept  ontology  term-concept association
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