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Combining Model-Oriented and Description-Oriented Approaches for Probabilistic Indexing.

Norbert Fuhr, Ulrich Pfeifer: Combining Model-Oriented and Description-Oriented Approaches for Probabilistic Indexing. SIGIR 1991: 46-56
@inproceedings{DBLP:conf/sigir/FuhrP91,
  author    = {Norbert Fuhr and
               Ulrich Pfeifer},
  editor    = {Abraham Bookstein and
               Yves Chiaramella and
               Gerard Salton and
               Vijay V. Raghavan},
  title     = {Combining Model-Oriented and Description-Oriented Approaches
               for Probabilistic Indexing},
  booktitle = {Proceedings of the 14th Annual International ACM SIGIR Conference
               on Research and Development in Information Retrieval. Chicago,
               Illinois, USA, October 13-16, 1991 (Special Issue of the SIGIR
               Forum)},
  publisher = {ACM},
  year      = {1991},
  isbn      = {0-89791-448-1},
  pages     = {46-56},
  ee        = {db/conf/sigir/FuhrP91.html},
  crossref  = {DBLP:conf/sigir/91},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

We distinguish model-oriented and description-oriented approaches in probabilistic information retrieval. The former refer to certain representations of documents and queries and use additional independence assumptions, whereas the latter map documents and queries onto feature vectors which form the input to certain classification procedures or regression methods. Description-oriented approaches are more flexible with respect to the underlying representations, but the definition of the feature vector is a heuristic step. In this paper, we combine a probabilistic model for the Darmstadt Indexing Approach with logistic regression. Here the probabilistic model forms a guideline for the definition of the feature vector. Experiments with the purely theoretical approach and with several heuristic variations show that heuristic assumptions may yield significant improvements.

Copyright © 1991 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.


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Abraham Bookstein, Yves Chiaramella, Gerard Salton, Vijay V. Raghavan (Eds.): Proceedings of the 14th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval. Chicago, Illinois, USA, October 13-16, 1991 (Special Issue of the SIGIR Forum). ACM 1991, ISBN 0-89791-448-1
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