Supervised semantic indexing and its extensions
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United States of America Patent
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Dec 25, 2012
Grant Date -
Jul 15, 2010
app pub date -
Sep 18, 2009
filing date -
Jan 12, 2009
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Abstract
A system and method for determining a similarity between a document and a query includes building a weight vector for each of a plurality of documents in a corpus of documents stored in memory and building a weight vector for a query input into a document retrieval system. A weight matrix is generated which distinguishes between relevant documents and lower ranked documents by comparing document/query tuples using a gradient step approach. A similarity score is determined between weight vectors of the query and documents in a corpus by determining a product of a document weight vector, a query weight vector and the weight matrix.
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