کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6865726 678082 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Making recommendations from top-N user-item subgroups
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر هوش مصنوعی
پیش نمایش صفحه اول مقاله
Making recommendations from top-N user-item subgroups
چکیده انگلیسی
Group-aware collaborative filtering (CF) has recently become a hot research topic in recommender systems, which typically divides a large CF task on the entire data (i.e. rating matrix) into some smaller CF tasks on subgroups (i.e., sub-matrices). This leads to an effective way to improve current CF systems in accuracy and efficiency. However, existing approaches consider each subgroup separately, ignoring relationships among subgroups. In this paper, motivated by the intuition that there are similar users or items among different subgroups, we propose an improved group-aware CF algorithm which predicts a rating using a weighted sum of similar ratings from multiple subgroups. Our algorithm is based on Matrix Factorization and CodeBook Transfer (CBT), especially that we construct N matrix approximations based on N best sub-matrices, and then integrate the N approximations via a linear combination. We conduct experiments on real-life data to evaluate the performance of our algorithm in comparison with traditional CF algorithms and other state-of-the-art social and group-aware recommendation models. The empirical result and analysis demonstrate that our algorithm achieves a significant increase in recommendation accuracy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurocomputing - Volume 165, 1 October 2015, Pages 228-237
نویسندگان
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