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coursera上的公开课《https://www.coursera.org/course/textanalytics》系列，讲的非常不错哦。
最后讲了文本分类，和plsa的几种变形，包括：
opinion mining和sentiment analysis：Ordinal Logistic Regression
opinion mining和sentiment analysis：Latent
Aspect Rating Analysis
Contextual Text Mining: Contextual Probabilistic Latent Semantic Analysis
Contextual Text Mining: Mining Topics with Social Network as Context
Contextual Text Mining: Mining Causal Topics with Time Series Supervision
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原文地址：http://blog.csdn.net/mmc2015/article/details/46952507
