J4 ›› 2011, Vol. 38 ›› Issue (3): 181-188.doi: 10.3969/j.issn.1001-2400.2011.03.030

• Original Articles • Previous Articles     Next Articles

Multi-grain joint model of topic and sentiment for opinion mining

ZHAO Yu;CAI Wandong   

  1. (College of Computer Science, Northwestern Polytechnical Univ., Xi'an   710072, China)
  • Received:2010-12-27 Online:2011-06-20 Published:2011-07-14
  • Contact: ZHAO Yu E-mail:zhaoyu_mail@126.com

Abstract:

Based on extensions to standard topic modeling methods,a novel multi-grain joint model of topic and sentiment is proposed to improve efficiency of opinion mining. This model extracts sentiment and hierarchy topic from the text simultaneously, which distinguishes between local topics and global topics. The proposed model adopts the unsupervised learning method to address the issue of being domain dependent in existing methods. According to experiments, this model achieves an accuracy of 82.6% for sentiment classification. It has a performance comparable to that of supervised sentiment classification methods. Moreover, the acquired collection of topics is hierarchy and semantic related. It is proved that the proposed model is feasible and effective for opinion mining.

Key words: opinion mining, topic model, multi-grain joint topic/sentiment model, unsupervised learning, Monte Carlo simulation