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CS276 Information Retrieval and Web Search

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CS276 Information Retrieval and Web Search

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    1. CS276 Information Retrieval and Web Search Lecture 7

    2. Recap: tf-idf weighting The tf-idf weight of a term is the product of its tf weight and its idf weight. Best known weighting scheme in information retrieval Increases with the number of occurrences within a document Increases with the rarity of the term in the collection

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