Patent ID: 7689452
Filing Date: 2010-03-30
Classification: G06Q,H04N

Abstract:
1. A computer-implemented method of predicting an active user's rating for an item in a recommendation system implemented on computing equipment, wherein the active user and a plurality of non-active users are members of a social network implemented on computing equipment, comprising: providing a similarity measure, w″ determining ratings for items rated by non-active users in said recommendation system; calculating, with the similarity measure w″ wherein the similarity measure, w″ wherein an initial version of the similarity measure w where r u,i is the rating of non-active user u who has rated item i, r a,i is the rating of active user, a, who has rated item i, wherein calculating a second version of the similarity measure, w′ w′ otherwise where I u is the set of items that neighbor user u has rated, I a is the set of items that active user a has rated, wherein the similarity measure w″ where η is a tunable parameter and d