'Faster cosine unweighted query' diaporamas de présentation

Faster cosine unweighted query - PowerPoint PPT Presentation

Instructor : Dr. Sumanta Guha

Instructor : Dr. Sumanta Guha

Information Retrieval and Data Mining (AT71.07) Comp. Sc. and Inf. Mgmt. Asian Institute of Technology. Instructor : Dr. Sumanta Guha Slide Sources : Introduction to Information Retrieval book slides from Stanford University, adapted and supplemented

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Lecture 8: Scoring and results assembly

Lecture 8: Scoring and results assembly

Lecture 8: Scoring and results assembly. Web Search and Mining. 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

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576 views • 48 slides
CS276 Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan

CS276 Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan

CS276 Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan Lecture 7: Scoring and results assembly. Ch. 6. 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

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482 views • 48 slides
CSCI 5417 Information Retrieval Systems Jim Martin

CSCI 5417 Information Retrieval Systems Jim Martin

CSCI 5417 Information Retrieval Systems Jim Martin. Lecture 6 9/8/2011. Today 9/8. Review basic Vector Space Model TF*IDF weighting Cosine scoring Ranked retrieval More efficient scoring/retrieval. Summary: tf x idf (or tf.idf). Assign a tf.idf weight to each term i in each document d

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469 views • 33 slides

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