期刊
EXPERT SYSTEMS WITH APPLICATIONS
卷 72, 期 -, 页码 221-230出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eswa.2016.10.065
关键词
Natural language processing; Sentiment analysis; Deep neural network
类别
资金
- National Natural Science Foundation of China [61370165, 61632011]
- National 863 Program of China [2015AA015405]
- Shenzhen Fundamental Research Funding [JCYJ20150625142543470]
- Shenzhen Peacock Plan Research Grant [KQCX20140521144507925]
- Guangdong Provincial Engineering Technology Research Center for Data Science [2016KF09]
Different types of sentences express sentiment in very different ways. Traditional sentence-level sentiment classification research focuses on one-technique-fits-all solution or only centers on one special type of sentences. In this paper, we propose a divide-and-conquer approach which first classifies sentences into different types, then performs sentiment analysis separately on sentences from each type. Specifically, we find that sentences tend to be more complex if they contain more sentiment targets. Thus, we propose to first apply a neural network based sequence model to classify opinionated sentences into three types according to the number of targets appeared in a sentence. Each group of sentences is then fed into a one-dimensional convolutional neural network separately for sentiment classification. Our approach has been evaluated on four sentiment classification datasets and compared with a wide range of baselines. Experimental results show that: (1) sentence type classification can improve the performance of sentence-level sentiment analysis; (2) the proposed approach achieves state-of-the-art results on several benchmarking datasets. (C) 2016 The Authors. Published by Elsevier Ltd.
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