一种基于概念的信息检索查询扩展

Query Expansion Based on Concepts in Information Retrieval

文章针对信息检索中存在的查询词“表达差异”问题,提出一种基于概念的查询扩展方法。一方面将用户查询中使用的词或短语与文档中抽出的概念相连接加入原查询,同时将作为扩展词的概念进行分类查询并采用整合排序算法调整结果;另一方面引入概念图供用户手动调节来进行查询扩展,以达到查询优化的目的。试验结果表明,该方法适宜改进Web上的信息检索,相对没有扩展的查询可以大幅度提高查询精度。

A method for query expansion based on concepts is proposed for the problem of ＂Expression Difference＂ that usually exists in Information Retrieval. On one hand, words and phrases from users for search are joined with the concepts from the target articles and add to the original search. Concepts which are used as expansion words are categorized and put into new search, after which conformity sorting method will be used to deal with the output. On the other hand, Concept Path Map is provided for users to expand their search results manually, which will surely optimize the whole searching process. As is indicated by the experiment, this method is suitable for promoting online information search. The precision of searching is highly improved by the method.