sentiment classify、情感词典自动构建，本项目采用无监督的方式自动判断情感词的极性。首先通过分词获取候选情感词，然后选取频率较高的前20个正、负面种子词，利用平滑的SO-PMI算法判断候选情感词的极性。该词典的构建可以用于情感分类。
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