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针对当前查询扩展方法存在的语义偏差和检索主题偏移问题,提出了基于本体和用户查询意图的查询扩展方法。该方法利用本体提供语义知识解决查询扩展过程中的语义偏差和歧义问题,结合用户查询意图进行初始查询扩展概念集的二次筛选,避免查询扩展过程中的检索主题偏移问题。实验结果表明,该方法取得了理想的预期效果,不仅能够有效地改善检索性能,还能够避免查询主题偏移问题。
Aiming at the problem of semantic deviation and retrieval topic offset existing in current query expansion method, a query expansion method based on ontology and user query intentions is proposed. This method uses ontology to provide semantic knowledge to solve the problem of semantic deviation and ambiguity in the process of query expansion. The second screening of the initial query expansion concept set is combined with the user query intent to avoid the problem of retrieval topic offset during query expansion. Experimental results show that this method has achieved the desired expected results, which not only can effectively improve the retrieval performance, but also can avoid the query subject offset.