SINAI at CLEF 2006 ad hoc robust multilingual track: query expansion using the Google search engine

Authors:
Fernando Martínez-Santiago;Arturo Montejo-Ráez;Miguel Á. García-Cumbreras;L. Alfonso Ureña-López
Affiliations:
SINAI Research Group, Computer Science Department, University of Jaén, Spain;SINAI Research Group, Computer Science Department, University of Jaén, Spain;SINAI Research Group, Computer Science Department, University of Jaén, Spain;SINAI Research Group, Computer Science Department, University of Jaén, Spain
Venue:
CLEF'06 Proceedings of the 7th international conference on Cross-Language Evaluation Forum: evaluation of multilingual and multi-modal information retrieval
Year:
2006

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Abstract

This year, we have participated in the Ad-Hoc Robust Multilingual track with the aim of evaluating two important issues in Cross-Lingual Information Retrieval (CLIR) systems. This paper first describes the method applied for query expansion in a multilingual environment by using web search results provided by the Google engine in order to increase retrieval robustness. Unfortunately, the results obtained are disappointing. The second issue reported alludes to the robustness of several common merging algorithms. We have found that 2-step RSV merging algorithms perform better than others algorithms when evaluating using geometric average.