Inproceedings3015
Fehler im Ausdruck: Unerkanntes Wort „braun“
Fehler im Ausdruck: Unerkanntes Wort „nicolay“
Fehler im Ausdruck: Unerkanntes Wort „cimiano“
Cross-lingual Information Retrieval based on Multiple Indexes
Cross-lingual Information Retrieval based on Multiple Indexes
Published: 2009
September
Buchtitel: Working Notes for the CLEF 2009 Workshop
Verlag: Cross-lingual Evaluation Forum
Erscheinungsort: Corfu, Greece
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Kurzfassung
In this paper we present the technical details of the retrieval system with which
we participated at the CLEF09 Ad-hoc TEL task. We present a retrieval approach
based on multiple indexes for di�erent languages which is combined with a conceptbased
retrieval approach based on Explicit Semantic Analysis. In order to create the
language-speci�c indices for each language, a language detection approach is applied
as preprocessing step. We combine the di�erent indices through rank aggregation and
present our experimental results with di�erent rank aggregation strategies. Our results
show that the use of multiple indices (one for each language) does not improve upon a
baseline index containing documents in all languages. The combination with concept
based retrieval, however, results in better retrieval performance in some of the cases
considered. For the bi-lingual tasks the �nal retrieval results of our system were the
5th best results on the BL dataset and the second best on the BNF dataset.
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Information Retrieval, Natürliche Sprachverarbeitung