一种基于语义关联度计算的查询扩展方法

A Method of Query Expansion Based on Semantic Correlation Calculation

语义查询扩展是提高信息检索质量的常用方法之一,针对语义查询扩展容易出现扩展过度的现象,综合多个因素计算语义相似度,考虑用户自定义关系计算语义相关度,引入Sigmoid权重函数计算综合关联度,提高查询扩展的精确度。最后,通过实验表明扩展效果良好。

Semantic query expansion is one of the best methods to improve information retrieval quality.Considering over expansion of semantic query expansion, a new method to calculate comprehensive semantic correlation is proposed, the method took into consideration the multiple factors to calculate semantic similarity and some user-defined object properties to calculate semantic relevancy. Then the sigmoid function is introduced and comprehensive calculation formula is given to increase the accuracy of query. Finally, experiment shows that the method has good expansion effect.