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20 lines
1.0 KiB
Markdown
20 lines
1.0 KiB
Markdown
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## Information Retrieval
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Information retrieval is the activity of obtaining information resources relevant to an information need from a collection of information resources. (Says Wikipedia).
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The included documents are
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*
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[Graph of Word and TW-IDF](http://www.lix.polytechnique.fr/~rousseau/papers/rousseau-cikm2013.pdf) - Francois Rousseau & Michalis Vazirgiannis
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The traditional IR system stores term-specific statistics (typically
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a term's frequency in each document - which we call TF) in an index.
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Such a model ignores dependencies between terms and considers a
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document's terms to occur independently of each other (and is aptly
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called the bag-of-words model). In this paper the authors use a
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statistic that uses a graph representation of a document to encode
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dependencies between terms and replace the TF statistic with a new
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TW statistic based on the graph constructed and achieve
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significantly better results that popular existing models. This
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paper won a honorable mention at CIKM 2013.
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