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  Why Spectral Retrieval Works

Bast, H., & Majumdar, D. (2005). Why Spectral Retrieval Works. In Proceedings of SIGIR 2005 (SIGIR-05): the Twenty-Eighth Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (pp. 11-18). New York, USA: ACM.

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 Creators:
Bast, Holger1, Author           
Majumdar, Debapriyo1, Author           
Marchionini, Gary2, Editor
Moffat, Alistair, Editor
Tait, John, Editor
Baeza-Yates, Ricardo, Editor
Ziviani, Nivio, Editor
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1Algorithms and Complexity, MPI for Informatics, Max Planck Society, ou_24019              
2Max Planck Society, ou_persistent13              

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 Abstract: We introduce the \emph{synonymy graph} as a new angle of looking at spectral retrieval techniques, including latent semantic indexing (LSI) and its many successors. The synonymy graph is defined for each pair of terms in the collection, and our findings suggest that it is at the heart of what makes spectral retrieval work in practice. % We show that LSI and many of its variants can be equivalently viewed as a particular document expansion (not query expansion) process, where each term effects the insertion of some other term if and only if the synonymy graph for that term pair has a certain characteristic shape. We provide a simple, parameterless algorithm for detecting that shape. % We point out inherent problems of every algorithm that bases its expansion decisions merely on individual values of the synonymy graph, as done by almost all existing methods. Our new algorithm overcomes these limitations, and it consistently outperforms previous methods on a number of test collections. % Our synonymy graphs also shed light on the effectiveness of three fundamental types of variations of the basic LSI scheme.

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Language(s): eng - English
 Dates: 2006-03-202005
 Publication Status: Issued
 Pages: -
 Publishing info: New York, USA : ACM
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 279199
Other: Local-ID: C1256428004B93B8-ADC0E49B750350FBC1256FE3003F05CA-bastmajumdar05sigir
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Title: Untitled Event
Place of Event: Salvador, Brazil
Start-/End Date: 2005-08-15

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Title: Proceedings of SIGIR 2005 (SIGIR-05) : the Twenty-Eighth Annual International ACM SIGIR Conference on Research and Development in Information Retrieval
Source Genre: Proceedings
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Publ. Info: New York, USA : ACM
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 11 - 18 Identifier: ISBN: 1-58113-881-4