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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.6 P.871-882

http://doi.org/10.1631/jzus.2007.A0871


A novel dependency language model for information retrieval


Author(s):  CAI Ke-ke, BU Jia-jun, CHEN Chun, QIU Guang

Affiliation(s):  School of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   caikeke@zju.edu.cn, bjj@zju.edu.cn

Key Words:  Term dependency, Language modeling (LM), Retrieval model, Sentence retrieval


CAI Ke-ke, BU Jia-jun, CHEN Chun, QIU Guang. A novel dependency language model for information retrieval[J]. Journal of Zhejiang University Science A, 2007, 8(6): 871-882.

@article{title="A novel dependency language model for information retrieval",
author="CAI Ke-ke, BU Jia-jun, CHEN Chun, QIU Guang",
journal="Journal of Zhejiang University Science A",
volume="8",
number="6",
pages="871-882",
year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.A0871"
}

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%T A novel dependency language model for information retrieval
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%A BU Jia-jun
%A CHEN Chun
%A QIU Guang
%J Journal of Zhejiang University SCIENCE A
%V 8
%N 6
%P 871-882
%@ 1673-565X
%D 2007
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.A0871

TY - JOUR
T1 - A novel dependency language model for information retrieval
A1 - CAI Ke-ke
A1 - BU Jia-jun
A1 - CHEN Chun
A1 - QIU Guang
J0 - Journal of Zhejiang University Science A
VL - 8
IS - 6
SP - 871
EP - 882
%@ 1673-565X
Y1 - 2007
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2007.A0871


Abstract: 
This paper explores the application of term dependency in information retrieval (IR) and proposes a novel dependency retrieval model. This retrieval model suggests an extension to the existing language modeling (LM) approach to IR by introducing dependency models for both query and document. Relevance between document and query is then evaluated by reference to the Kullback-Leibler divergence between their dependency models. This paper introduces a novel hybrid dependency structure, which allows integration of various forms of dependency within a single framework. A pseudo relevance feedback based method is also introduced for constructing query dependency model. The basic idea is to use query-relevant top-ranking sentences extracted from the top documents at retrieval time as the augmented representation of query, from which the relationships between query terms are identified. A Markov Random Field (MRF) based approach is presented to ensure the relevance of the extracted sentences, which utilizes the association features between query terms within a sentence to evaluate the relevance of each sentence. This dependency retrieval model was compared with other traditional retrieval models. Experiments indicated that it produces significant improvements in retrieval effectiveness.

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