一种基于词间关联规则挖掘的查询扩展方法

An Algorithm of Query Expansion Based on Association Rules Between Terms

针对现有信息检索系统中存在的词不匹配问题,提出一种基于词间关联规则的查询扩展算法,该算法利用现有挖掘算法自动对前列初检文档进行词间关联挖掘,提取含有原查询词的词间关联规则,从中提取扩展词,实现查询扩展。实验结果表明,该算法能改善和提高信息检索系统性能,具有很高的应用价值。

Aiming at the problem of no-malehing of word,a novel query expansion algorithm is proposed based on association rules between terms. The algorithm can automatically mine those association rules related to original query in the top-ranked retrieved documents using the existing mining algorithm, and can construct an association rules-based database, extract expansion terms related to original query from the database for query expansion. Experimental results show that this algorithm is much better than traditional ones in average precision.