Séminaires RALI-OLST

Integration of word relations into language modeling

Guihong Cao

RALI, DIRO

Wednesday 20 April 2005 at 10:30 AM

Salle 3195, Pavillon André-Aisenstadt


In this presentation, I will describe a novel dependency language modeling approach for information retrieval. The approach extends the existing language modeling approach by relaxing the independence assumption. Our goal is to build a language model in which various word relationships can be integrated. We integrate two types of relationships, one extracted from WordNet and co-occurrence relationships having complementary advantages: the first is more precise and the second has a broader coverage. Our approach has been tested on several TREC collections and it achieves substantial and significant improvements with respect to the models without these relationships.


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