[1]HAO Jie,XIE Jun,SU Jingqiong,et al.An unsupervised approach for sentiment classification based on weighted latent dirichlet allocation[J].CAAI Transactions on Intelligent Systems,2016,11(4):539-545.[doi:10.11992/tis.201606007]
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CAAI Transactions on Intelligent Systems[ISSN 1673-4785/CN 23-1538/TP] Volume:
11
Number of periods:
2016 4
Page number:
539-545
Column:
学术论文—自然语言处理与理解
Public date:
2016-07-25
- Title:
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An unsupervised approach for sentiment classification based on weighted latent dirichlet allocation
- Author(s):
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HAO Jie; XIE Jun; SU Jingqiong; XU Xinying; HAN Xiaoxia
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Information Engineering College, Taiyuan University of Technology, Jinzhong 030600, China
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- Keywords:
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sentiment classification; topic and sentiment unification model; topic model; LDA; weighting algorithm
- CLC:
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TP391
- DOI:
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10.11992/tis.201606007
- Abstract:
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The topic and sentiment unification model can efficiently detect topics and emotions for a given corpus. Faced with the low discriminability of topics in sentiment/topic analysis methods, this paper proposes a novel method, the weighted latent dirichlet allocation algorithm (WLDA), which can acquire sentiments and topics without supervision. The model assigns weights to terms during Gibbs sampling by calculating the distance between seed words and terms, then counts the weights of key words to estimate the sentiment orientation of each topic and obtain the emotional distribution throughout documents. This method enhances the impact of words that convey emotional attitudes and obtains more discriminative topics as a consequence. The experiments show that WLDA, compared with the joint sentiment/topic model (JST), not only has a higher iteration sampling speed, but also gives better results for topic extraction and sentiment classification.