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A Two-Stage Approach for Generating Topic Models

  • Yang Gao
  • Yue Xu
  • Yuefeng Li
  • Bin Liu
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7819)

Abstract

Topic modeling has been widely utilized in the fields of information retrieval, text mining, text classification etc. Most existing statistical topic modeling methods such as LDA and pLSA generate a term based representation to represent a topic by selecting single words from multinomial word distribution over this topic. There are two main shortcomings: firstly, popular or common words occur very often across different topics that bring ambiguity to understand topics; secondly, single words lack coherent semantic meaning to accurately represent topics. In order to overcome these problems, in this paper, we propose a two-stage model that combines text mining and pattern mining with statistical modeling to generate more discriminative and semantic rich topic representations. Experiments show that the optimized topic representations generated by the proposed methods outperform the typical statistical topic modeling method LDA in terms of accuracy and certainty.

Keywords

Topic modeling Topic representation Tf-idf Frequent pattern mining Entropy 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Yang Gao
    • 1
  • Yue Xu
    • 1
  • Yuefeng Li
    • 1
  • Bin Liu
    • 1
  1. 1.School of Electrical Engineering and Computer ScienceQueensland University of TechnologyBrisbaneAustralia

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