'Bits gap entry' diaporamas de présentation

CS276A Information Retrieval

CS276A Information Retrieval. Lecture 3. Recap: lecture 2. Stemming, tokenization etc. Faster postings merges Phrase queries. This lecture. Index compression Space estimation. Corpus size for estimates. Consider n = 1M documents, each with about L =1K terms.

544 views • 47 slides

Information Retrieval and Web Search

592 views • 46 slides

Information Retrieval and Web Search

481 views • 46 slides

Index Compression

Index Compression. Lecture 4. Recap: lecture 3. Stemming, tokenization etc. Faster postings merges Phrase queries. This lecture. Index compression Space for postings Space for the dictionary Will only look at space for the basic inverted index here Wild-card queries.

547 views • 45 slides

Information Retrieval

Information Retrieval. Lecture 4. Recap: lecture 2. Stemming, tokenization etc. Faster postings merges Phrase queries. This lecture. Index compression Space for postings Space for the dictionary Will only look at space for the basic inverted index here Wild-card queries.

505 views • 43 slides

CS728 Web Indexes

483 views • 40 slides

Index Compression

Index Compression. Adapted from Lectures by Prabhakar Raghavan (Yahoo, Stanford) and Christopher Manning. Plan. Last lecture Index construction Doing sorting with limited main memory Parallel and distributed indexing Today Index compression Space estimation Dictionary compression

523 views • 38 slides