Comparing and Combining Methods for Automatic Query Expansion

  title={Comparing and Combining Methods for Automatic Query Expansion},
  author={Jos{\'e} R. P{\'e}rez-Ag{\"u}era and Lourdes Araujo},
Query expansion is a well known method to improve the performance of information retrieval systems. In this work we have tested different approaches to extract the candidate query terms from the top ranked documents returned by the first-pass retrieval. One of them is the cooccurrence approach, based on measures of cooccurrence of the candidate and the query terms in the retrieved documents. The other one, the probabilistic approach, is based on the probability distribution of terms in the… CONTINUE READING
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