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Filtering system for providing personalized information in the absence of negative data

  • US 7,567,958 B1
  • Filed: 11/22/2000
  • Issued: 07/28/2009
  • Est. Priority Date: 04/04/2000
  • Status: Active Grant
First Claim
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1. A computer implemented method for ranking documents in a database in accordance with preferences of a viewer of the documents, the method comprising:

  • presenting a document set from which a viewer can select one or more documents for viewing by the viewer;

    generating at least one positive word vector using words contained in at least a segment of the documents in the document set that are selected by the viewer for viewing;

    generating at least one negative word vector using words contained in at least a segment of the documents in the document set that are not selected by the viewer for viewing;

    generating a group of word vectors for a group of documents to be ranked; and

    ranking the group of documents using a word vector space representation of at least the document set operative with said positive word vector, said negative word vector, and the group of word vectors.

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