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:
Jan. 13, 2004
Filed:
Jun. 12, 2001
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, a computer system, and a program product for retrieving and/or ranking documents in a database. The method comprising steps of, providing a document matrix derived from the documents, the matrix including numerical elements derived from the attributes; providing a covariance matrix derived from the document matrix; executing singular value decomposition of the covariance matrix so as to obtain the following formula: K=V·&Sgr;·V , wherein K represents the covariance matrix, V represents the matrix consisting of eigenvectors, &Sgr; represents a diagonal matrix, and V represents a transpose of the matrix V; reducing a dimension of the matrix V using a predetermined number of eigenvectors included in the matrix V, the eigenvectors including an eigenvector corresponding to the largest singular value; reducing a dimension of the document matrix using the dimension reduced matrix V; and retrieving and/or ranking the documents in the database by computing the scalar product between the dimension reduced document matrix and a query vector.