Data processing: database and file management or data structures – Database and file access – Preparing data for information retrieval
Reexamination Certificate
2011-08-16
2011-08-16
Trujillo, James (Department: 2159)
Data processing: database and file management or data structures
Database and file access
Preparing data for information retrieval
Reexamination Certificate
active
08001132
ABSTRACT:
Systems and techniques for estimation of item ratings for a user. A set of item ratings by multiple users is maintained, and similarity measures for all items are precomputed, as well as values used to generate interpolation weights for ratings neighboring a rating of interest to be estimated. A predetermined number of neighbors are selected for an item whose rating is to be estimated, the neighbors being those with the highest similarity measures. Global effects are removed, and interpolation weights for the neighbors are computed simultaneously. The interpolation weights are used to estimate a rating for the item based on the neighboring ratings, Suitably, ratings are estimated for all items in a predetermined dataset that have not yet been rated by the user, and recommendations are made of the user by selecting a predetermined number of items in the dataset having the highest estimated ratings.
REFERENCES:
patent: 2004/0103092 (2004-05-01), Tuzhilin et al.
patent: 2004/0158497 (2004-08-01), Brand
patent: 2006/0271286 (2006-11-01), Rosenberg
patent: 2008/0120339 (2008-05-01), Guan et al.
Bell Robert
Koren Yehuda
AT&T Intellectual Property I L.P.
Singh Amresh
Trujillo James
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