semantic-based query expansion
semantic-based query expansion
基于语义的查询扩展
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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。
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