Probabilistic Model for Contextual Retrieval
Probabilistic Model for Contextual Retrieval
Probabilistic Model for Contextual Retrieval
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Methodology (cont.)Mutual in<strong>for</strong>mation:I(a, b) = ln(P (a, b)p(a)p(b) )Taking query logs as a bridge, we could use mutual in<strong>for</strong>mation todetermine the degrees of correlations among query terms, contextualelements and document terms.<strong>Probabilistic</strong> <strong>Model</strong> <strong>for</strong> <strong>Contextual</strong> <strong>Retrieval</strong> – p.7/20
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