The hypergeometric model assumes that the document is a sample, and the population is from the collection. The DLH model is a generalistion of the hypergeometric model in a binomial case.

This model is parameter-free and implicitly contains the term frequency normalisation component.

The formula of the DLH model can be found from FormulasOfDFRModels.

last edited 2007-02-17 12:30:49 by IadhOunis