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4 query terms - PowerPoint PPT Presentation

Dictionary search

Dictionary search

Dictionary search. Making one-side errors. Paper on Bloom Filter. Crawling. How to keep track of the URLs visited by a crawler? URLs are long Check should be very fast No care about small errors (? page not crawled). Bloom Filter over crawled URLs. Searching with errors.

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822 views • 82 slides
CS276 Information Retrieval and Web Search Pandu Nayak and Prabhakar Raghavan

CS276 Information Retrieval and Web Search Pandu Nayak and Prabhakar Raghavan

CS276 Information Retrieval and Web Search Pandu Nayak 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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687 views • 44 slides
Information Retrieval and Web Search Lecture 7: Scoring and results assembly

Information Retrieval and Web Search Lecture 7: Scoring and results assembly

Information Retrieval and Web Search 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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542 views • 43 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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