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Information retrieval

Information retrieval

Information retrieval. 20 19 /20 20. ir process. Ranked retrieval. Thus far, our queries have all been Boolean . Documents either match or don’t. Good for expert users with precise understanding of their needs and the collection.

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1.11k views • 98 slides
Hinrich Schütze and Christina Lioma Lecture 6: Scoring, Term Weighting, The Vector Space Model

Hinrich Schütze and Christina Lioma Lecture 6: Scoring, Term Weighting, The Vector Space Model

Hinrich Schütze and Christina Lioma Lecture 6: Scoring, Term Weighting, The Vector Space Model. Overview. Recap Why ranked retrieval? Term frequency tf-idf weighting The vector space model. Outline. Recap Why ranked retrieval? Term frequency tf-idf weighting

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666 views • 64 slides
Web Corpus Construction

Web Corpus Construction

Web Corpus Construction. Summary of Roland & Bildhauer (2013) with techniques applied to LA Times Columnist Corpus Construction and Processing Kristen Howe. Web Corpora. Static collection of a # of documents downloaded from the web Intended for work in: empirical linguistics

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847 views • 47 slides
Natural Language Questions for the Web of Data

Natural Language Questions for the Web of Data

Natural Language Questions for the Web of Data. Mohamed Yahya , Klaus Berberich , Gerhard Weikum Max Planck Institute for Informatics, Germany Shady Elbassuoni Qatar Computing Research Institute Maya Ramanath Dept. of CSE, IIT-Delhi, India Volker Tresp

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623 views • 47 slides
Cluster Analysis

Cluster Analysis

Cluster Analysis. Cluster Analysis. What is Cluster Analysis? Types of Data in Cluster Analysis A Categorization of Major Clustering Methods Partitioning Methods Hierarchical Methods Density-Based Methods Grid-Based Methods Subspace Clustering/Bi-clustering Model-Based Clustering.

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704 views • 44 slides

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