Lecture 3 Modeling.pdf
Lecture 3 Modeling.pdf
Lecture 3 Modeling.pdf
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Probabilistic Principle• w i,j ∈{0,1}, w i,q ∈{0,1}: the index term weight variablesare all binary non-relevant• q: a query which is a subset of index terms• R: the set of documents known to be relevant• R (complement of R): the set of non-relevant documents• P(R|d j ): the probability that the document d j is relevantto the query q• P(R|d j ): the probability that d j is non-relevant to q3-33