Affiliations: School of Computer Engineering and Science, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Correspondence:
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Correspondence to: Yue Liu, School of Computer Engineering and Science, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, China. E-mail: yliu@staff.shu.edu.cn.
Abstract: To address the problem that the existing time-aware methods always recommend out-of-fashion items to users, this paper proposes a novel method named Item Life Cycle based Collaborative Filtering (ItemLC-CF), taking both user’s preference and item’s popularity into consideration. This method presents a life cycle function to simulate the variation of item’s popularity and integrates such variation with CF to learn the relative preference for items by reranking the candidate set of CF according to item’s vitality. Given that it is extremely complicated to construct a life cycle function for each item, items are clustered into different categories via their popularities instead of original product categories. Meanwhile, a SVM ensemble classifier based on AdaBoost is employed to find an appropriate category for new arrival items. Evaluation on MovieLens-1M dataset demonstrates that the proposed method can improve the performance of recommendation list, in turn providing more reasonable and popular recommendation lists for users.
Keywords: Collaborative filtering, item life cycle, recommender system, interest shift
