关键词: 依存关系, 冗长查询, 结果重构, 查询扩展

Abstract: The authors extended the traditional “bag of words” idea. Every document was regarded as “bag of sentences”. The dependency relationship of the words was obtained from the “bag of sentences” and verbose queries by dependency parsing. According to the matching degree of the dependence relationship, the similarity scores between verbose queries and documents was obtained. Finally, the initial results were re-ranked. Experiment on a standard TREC corpus shows that new approach can improve retrieval effectiveness for verbose query and the low recall rate. For the low recall rate, the MAP and P@N have a significantly improvement.

Key words: dependency relationship, verbose queries, result reconfiguration, query expansion