The Recommendation Space Links derived from Users Items similar attributes, explicit connections User-User Item-Item Links Links Links derived from similar attributes, Observed preferences (Ratings,purchases, similar content,explicit page views,laundry cross references lists,play lists)
Users Items The Recommendation Space Item-Item Links User-User Links Links derived from similar attributes, similar content, explicit cross references Links derived from similar attributes, explicit connections Observed preferences (Ratings, purchases, page views, laundry lists, play lists)
Definitions recommendation system ,为user提供对titems的recommendation/prediction/ opinion的系统 Rule-based systems use manual rules to do this An item similarity/clustering system ·使用item links A classic collaborative filtering system ·使用links between users and items Commonly one has hybrid systems "使用前面all three kinds of links
Definitions ◼ recommendation system ◼ 为user提供对items的recommendation/ prediction/ opinion的系统 ◼ Rule-based systems use manual rules to do this ◼ An item similarity/clustering system ◼ 使用item links ◼ A classic collaborative filtering system ◼ 使用links between users and items ◼ Commonly one has hybrid systems ◼ 使用前面all three kinds of links
Link types User attributes-based Recommendation Male,18-35:Recommend The Matrix MATRIX Item attributes-based RE OADED Content Similarity You liked The Matrix: recommend The Matrix Tom Hankss Reloaded Forrest Gump Collaborative Filtering People with interests like yours also liked Forrest Gump
Link types ◼ User attributes-based Recommendation ◼ Male, 18-35: Recommend The Matrix ◼ Item attributes-based Content Similarity ◼ You liked The Matrix: recommend The Matrix Reloaded ◼ Collaborative Filtering ◼ People with interests like yours also liked Forrest Gump
Example -behavior only Users Docs viewed @ d2 U2 d3 U1 viewed d1,d2,d3 U2 views d1,d2. Recommend d3 to U2
Example - behavior only Users Docs viewed U1 U2 d1 d2 d3 U1 viewed d1, d2, d3. U2 views d1, d2. Recommend d3 to U2. ?
Expert finding simple example dl d2 U2 d3 Recommend U1 to U2 as someone to talk to?
Expert finding - simple example Recommend U1 to U2 as someone to talk to? U1 U2 d1 d2 d3