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该方法首先为三维模型构造语义树；
This method constructs a semantic tree for 3D models firstly.
提出了一种逻辑函数化简语义树算法。
An algorithm for logic function minimization called semantic tree is reported in the paper.
实验表明，本文提出的基于语义树的加权语义相似度模型与传统的词频相似度模型相比，准确率有明显提高。
Test result shows that compared with traditional similarity model of word frequency, the weighted semantic similarity model improves the precision obviously.
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