A study of the dirichlet priors for term frequency normalisation

  title={A study of the dirichlet priors for term frequency normalisation},
  author={Ben He and Iadh Ounis},
In Information Retrieval (IR), the Dirichlet Priors have been applied to the smoothing technique of the language modeling approach. In this paper, we apply the Dirichlet Priors to the term frequency normalisation of the classical BM25 probabilistic model and the Divergence from Randomness PL2 model. The contributions of this paper are twofold. First, through extensive experiments on four TREC collections, we show that the newly generated models, to which the Dirichlet Priors normalisation is… CONTINUE READING
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