| 特征词抽取和相关性融合的伪相关反馈查询扩展 |
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| 引用本文： | 冯平,黄名选.特征词抽取和相关性融合的伪相关反馈查询扩展[J].现代图书情报技术,2011,27(1):52-56. |
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| 作者姓名： | 冯平 黄名选 |
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| 作者单位： | 1. 广西工学院电子信息与控制工程系 柳州 545006;
2. 广西教育学院数学与计算机科学系 南宁 530023 |
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| 基金项目： | 本文系广西教育厅科研项目 “基于加权负关联规则挖掘的文本信息检索技术研究”(项目编号:201010LX679)和广西教育学院2010年度院级重点课题“基于正负关联规则的信息检索技术研究”(项目编号:桂教院科研[2010]7号(重点)-3)的研究成果之一。 |
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| 摘 要： | 针对现有信息检索系统中存在的词不匹配问题,提出一种基于特征词抽取和相关性融合的伪相关反馈查询扩展算法以及新的扩展词权重计算方法。该算法从前列n篇初检局部文档中抽取与原查询相关的特征词,根据特征词在初检文档集中出现的频度以及与原查询的相关度,将特征词确定为最终的扩展词实现查询扩展。实验结果表明,该方法有效,并能提高和改善信息检索性能。
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| 关 键 词： | 相关性 伪相关反馈 查询扩展 信息检索 |
| 收稿时间： | 2010-11-25 |
| 修稿时间： | 2010-12-20 |
Query Expansion of Pseudo Relevance Feedback Based on Feature Terms Extraction and Correlation Fusion |
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| Feng Ping Huang Mingxuan.Query Expansion of Pseudo Relevance Feedback Based on Feature Terms Extraction and Correlation Fusion[J].New Technology of Library and Information Service,2011,27(1):52-56. |
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| Authors: | Feng Ping Huang Mingxuan |
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| Institution: | 1. Electronic Information and Control Engineering Department, Guangxi University of Technology, Liuzhou 545006, China;
2. Department of Math and Computer Science, Guangxi College of Education, Nanning 530023, China |
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| Abstract: | Aiming at the term mismatch issues of existing information retrieval systems, a novel query expansion algorithm of pseudo relevance feedback is proposed based on feature terms extraction and correlation fusion. At the same time, a new computing method for weights of expansion terms is also given. The algorithm can extract feature terms related to original query from the n chapter top-ranked retrieved local documents, and then identify those feature terms as final expansion terms according to the frequency of each feature term appeared in the local documents and the correlation between each feature term and the entire original query for query expansion. The results of the experiment show that the method is effective,and it can enhance and improve the performance of information retrieval. |
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| Keywords: | Correlation Pseudo relevance feedback Query expansion Information retrieval |
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