'Relevance judgments' diaporamas de présentation

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Modern Information Retrieval

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On Large-Scale Retrieval Tasks with Ivory and MapReduce

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Probabilistic Ranking Principle

Probabilistic Ranking Principle. Hongning Wang CS@UVa. Recap: latent semantic analysis. Solution Low rank matrix approximation. Random noise over the word selection in each document. Imagine this is our observed term-document matrix. Imagine this is *true* concept-document matrix.

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CLEF-2005 Cross-Language Speech Retrieval Track Overview

CLEF-2005 Cross-Language Speech Retrieval Track Overview. UMD: Douglas Oard , Dagobert Soergel , Ryen White , Kim Braun, Xiaoli Huang, Craig Murray, Scott Olsson, Jianqiang Wang, Ryen White DCU: Gareth Jones IBM: Bhuvana Ramabhadran, Martin Franz VHF: Sam Gustman.

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Information Retrieval: Problem Formulation & Evaluation

Information Retrieval: Problem Formulation & Evaluation. ChengXiang Zhai Department of Computer Science University of Illinois, Urbana-Champaign. Research Process. Identification of a research question/topic Propose a possible solution/answer (formulate a hypothesis )

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Ranking and Learning

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Ranking and Learning

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Towards Practical Relevance Ranking for 10 Million Books

Towards Practical Relevance Ranking for 10 Million Books. w www.hathitrust.org ww.hathitrust.org. Tom Burton-West Information Retrieval Programmer Digital Library Production Service University of Michigan Library www.hathitrust.org/blogs/large-scale-search Code4lib February 12, 2013.

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Summarizing Highly Structured Documents for Effective Search Interaction

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Jack G. Conrad, Xi S. Guo, Peter Jackson, Monem Meziou Research & Development

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Philosophy of IR Evaluation

Philosophy of IR Evaluation. Ellen Voorhees. Evaluation: How well does system meet information need?. System evaluation : how good are document rankings? User-based evaluation : how satisfied is user?. ?. Why do system evaluation?.

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Jack G. Conrad, Xi S. Guo, Peter Jackson, Monem Meziou Research & Development

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Jack G. Conrad, Xi S. Guo, Peter Jackson, Monem Meziou Research & Development

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Tactics Used When Searching for Digital Videos

Tactics Used When Searching for Digital Videos. Barbara M. Wildemuth Jung Sun Oh Gary Marchionini University of North Carolina at Chapel Hill. The research question. Which search tactics do people use when they search for digital videos?. Some vocabulary. What do we know already?.

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Joint SemEval/CLEF tasks: Contribution of WSD to CLIR

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INFORMATION RETRIEVAL TECHNIQUES BY DR . ADNAN ABID

INFORMATION RETRIEVAL TECHNIQUES BY DR . ADNAN ABID. Lecture # 24 BENCHMARKS FOR THE EVALUATION OF IR SYSTEMS. ACKNOWLEDGEMENTS. The presentation of this lecture has been taken from the underline sources

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Future Direction : Collaborative Filtering

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