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:
Jul. 24, 2012
Filed:
Feb. 25, 2008
Bhiksha Ramakrishnan, Watertown, MA (US);
Evandro B. Gouvêa, Cambridge, MA (US);
Bent Schmidt-nielsen, Lexington, MA (US);
Garrett Weinberg, Watertown, MA (US);
Bret A. Harsham, Newton, MA (US);
Bhiksha Ramakrishnan, Watertown, MA (US);
Evandro B. Gouvêa, Cambridge, MA (US);
Bent Schmidt-Nielsen, Lexington, MA (US);
Garrett Weinberg, Watertown, MA (US);
Bret A. Harsham, Newton, MA (US);
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Abstract
An information retrieval system stores and retrieves documents using particles and a particle-based language model. A set of particles for a collection of documents in a particular language is constructed from training documents such that a perplexity of the particle-based language model is substantially lower than the perplexity of a word-based language model constructed from the same training documents. The documents can then be converted to document particle graphs from which particle-based keys are extracted to form an index to the documents. Users can then retrieve relevant documents using queries also in the form of particle graphs.