A Markov Random Field Topic Space Model for Document Retrieval

Details A Markov Random Field Topic Space Model for Document Retrieval A Markov Random Field Topic Space Model for Document Retrieval

2011-11-28

arxiv.org/abs/1111.6640v1

Computer Science

Information Retrieval

Scientific paper

This paper proposes a novel statistical approach to intelligent document retrieval. It seeks to offer a more structured and extensible mathematical approach to the term generalization done in the popular Latent Semantic Analysis (LSA) approach to document indexing. A Markov Random Field (MRF) is presented that captures relationships between terms and documents as probabilistic dependence assumptions between random variables. From there, it uses the MRF-Gibbs equivalence to derive joint probabilities as well as local probabilities for document variables. A parameter learning method is proposed that utilizes rank reduction with singular value decomposition in a matter similar to LSA to reduce dimensionality of document-term relationships to that of a latent topic space. Experimental results confirm the ability of this approach to effectively and efficiently retrieve documents from substantial data sets.

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