The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2005
Filed:
May. 22, 2001
Martin Franz, Yorktown Heights, NY (US);
Jeffrey S. Mccarley, Bedford Hills, NY (US);
Martin Franz, Yorktown Heights, NY (US);
Jeffrey S. McCarley, Bedford Hills, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of indexing a database of documents, by providing a vocabulary of n terms, indexing the database in the form of a non-negative n×m index matrix V, wherein each of its m columns represents an jdocument having n entries containing a function of the number of occurrences of a iterm of said vocabulary appearing in said jdocument, factoring out non-negative matrix factors T and D such that V≈TD, and wherein T is an n×r term matrix, D is an r×m document matrix, and r<nm/(n+m). The index so generated is useful in two-pass information retrieval systems.