Cultural Distance awared Collaborative Filtering Algorithm in Recommendation System

[摘要] Recently most of the existing studies on recommendation system are based on historical rating matrix and specific characteristics, such as location, season and weather. Different from these studies, we introduce an abstract feature about cultural backgrounds and values, called cultural distance, into the recommendation system to understand user intent better and improve the precision of recommendation results. We design a novel similarity representation which combine the item-based collaborative filtering and cultural distance to recommend items for users. We also propose a collaborative filtering-based missing cultural distance prediction algorithm to improve the precision of recommendation further. To evaluate the performance of our proposed algorithm, we execute experiments based on a large-scale real-world dataset, the results show that our algorithm can improve the precision by 10% accurate compared to existing recommendation approaches.

[发布机构] State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, China^1

[效力级别] 无线电电子学 [学科分类] 计算机科学（综合）

[关键词] Collaborative filtering algorithms;Cultural backgrounds;Item-based collaborative filtering;Prediction algorithms;Real-world;Similarity representation