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Passage Retrieval vs. Document Retrieval in the CLEF 2006 Ad Hoc Monolingual Tasks with the IR-n System

  • Elisa Noguera
  • Fernando Llopis
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4730)

Abstract

The paper describes our participation in monolingual tasks at CLEF 2006. We submitted results for the following languages: English, French, Portuguese and Hungarian. We focused on studying different weighting schemes (okapi and dfr) and retrieval strategies (passage retrieval and document retrieval) to improve retrieval performance. After an analysis of our experiments and of the official results at CLEF 2006, we achieved considerably improved scores by using different configurations for different languages (French, Portuguese and Hungarian).

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References

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    Amati, G., Van Rijsbergen, C.J.: Probabilistic Models of information retrieval based on measuring the divergence from randomness. ACM TOIS 20(4), 357–389 (2002)CrossRefGoogle Scholar
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    Savoy, J.: Fusion of Probabilistic Models for Effective Monolingual Retrieval. In: Peters, C., Gonzalo, J., Braschler, M., Kluck, M. (eds.) CLEF 2003. LNCS, vol. 3237, Springer, Heidelberg (2004)Google Scholar
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    Llopis, F.: IR-n: Un Sistema de Recuperación de Información Basado en Pasajes. PhD thesis, University of Alicante (2003)Google Scholar
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    Llopis, F., Noguera, E.: Combining Passages in the Monolingual Task with the IR-n System. In: Peters, C., Gey, F.C., Gonzalo, J., Müller, H., Jones, G.J.F., Kluck, M., Magnini, B., de Rijke, M., Giampiccolo, D. (eds.) CLEF 2005. LNCS, vol. 4022, Springer, Heidelberg (2006)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Elisa Noguera
    • 1
  • Fernando Llopis
    • 1
  1. 1.Grupo de investigación en Procesamiento del Lenguaje Natural y Sistemas de Información, Departamento de Lenguajes y Sistemas Informáticos, University of AlicanteSpain

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