Publication Type

Conference Proceeding Article

Version

acceptedVersion

Publication Date

7-2008

Abstract

Ranking plays a central role in many Web search and information retrieval applications. Ensemble ranking, sometimes called meta-search, aims to improve the retrieval performance by combining the outputs from multiple ranking algorithms. Many ensemble ranking approaches employ supervised learning techniques to learn appropriate weights for combining multiple rankers. The main shortcoming with these approaches is that the learned weights for ranking algorithms are query independent. This is suboptimal since a ranking algorithm could perform well for certain queries but poorly for others. In this paper, we propose a novel semi-supervised ensemble ranking (SSER) algorithm that learns query-dependent weights when combining multiple rankers in document retrieval. The proposed SSER algorithm is formulated as an SVM-like quadratic program (QP), and therefore can be solved efficiently by taking advantage of optimization techniques that were widely used in existing SVM solvers. We evaluated the proposed technique on a standard document retrieval testbed and observed encouraging results by comparing to a number of state-of-the-art techniques.

Discipline

Computer Sciences | Databases and Information Systems

Research Areas

Data Science and Engineering

Publication

Proceedings of the Twenty-Third AAAI Conference on Artificial Intelligence (AAAI 2008): July 13-17, 2008, Chicago. Illinois

First Page

634

Last Page

639

ISBN

9781577353683

Publisher

AAAI Press

City or Country

Menlo Park, CA

Copyright Owner and License

Publisher

Additional URL

https://www.aaai.org/Papers/AAAI/2008/AAAI08-101.pdf

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