Abstract：The research on sentiment analysis is a hot issue in natural language processing. This paper makes an intensive study of the two stages of sentiment analysisthe comment target extraction and the corresponding sentiment classification. For the first task, we use the syntactic analysis to obtain the candidats, and then combine PMI based on web mining and NN filtering algorithm to decide the targets. For the second task, we design certain heuristic rules by analyzing subjective sentences, and then apply these rules to predict the orientation of opinion in the sentences. This method performs well in Task Three of the COAE2008 i. Key wordscomputer application; Chinese information processing; sentiment classification; target; orientation judgment; syntactic analysis
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