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Latent semantic analysis for application in a question answer system

  • US 9,135,240 B2
  • Filed: 02/12/2013
  • Issued: 09/15/2015
  • Est. Priority Date: 02/12/2013
  • Status: Active Grant
First Claim
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1. A method for estimating similarity between concepts, the method comprising:

  • receiving a set of concepts related to a corpus of text documents;

    creating a representative graph structure having graph nodes each representing a latent semantic analysis (LSA) vector associated with a concept, and a node having one or more graph edges, each graph edge representing a strength of a relation between concepts based on an ontology; and

    deriving, for a concept, a new or modified vector represented by a node in the graph by propagating the LSA vectors against said graph structure, said new or modified vector representing a modified estimated similarity between concepts,wherein a programmed processor device is configured to perform said receiving, creating and deriving.

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