Collaborative-filtering contextual model optimized for an...

Details Collaborative-filtering contextual model optimized for an... Collaborative-filtering contextual model optimized for an...

2006-11-17

2009-08-11

Wong, Don (Department: 2163)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

07574422

ABSTRACT:
Methods and apparatus for a recommendation system based on collaborative filtering is provided. Explicit and implicit ratings of items by network users are used to create a contextual model. The explicit ratings comprise different rating types regarding different item attributes. The implicit ratings comprise different rating types derived from different user events and may include recency, intensity, or frequency ratings. The contextual model may be optimized for a specific objective function, such as click-through-rate or conversion rate. In other embodiments, item information is used to produce a content model where item information for an item is encoded as metadata into a document that represents the item. The contextual or content model is used to recommend one or more items to a current user. The basic unit of the recommendation system may be an item set of two or more items or a particular sequence of two or more items.

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Sarwar, et al., Item-Based Collaborative Filtering Recommendation Algorithms, Proceedings of the 10thInternational Conference on World Wide Web, 2001, pp. 285-295.

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