The conceptsimilarity is one of the most important problems in the machine language research.
概念相似度是计算机自然语言处理研究的重要问题之一。
2
On this basis, the scope of expanded concept set is adjusted by the similarity threshold, and the query expansion based on semantic concepts is realized.
在此基础上，通过对相似度阈值的控制来调整扩展概念集的范围和大小，从而实现语义概念层次上的查询扩展。
3
The paper proposes a model ofconcept semantic similarity computation based on thesaurus and semantic distance, and describes its computation process in detail.