However, these approaches focus on using one recommendation paradigm to aid the other and hence are unable to deal with both tasks in a unified way. Moreover, they only capture local sequential features of the interaction sequences, thus losing the whole historical infor- mation contained in user behaviors.
如何平等对待long-term and short-term: Multi-task learning approach:
(1) Long-term : MF
(2) Short-term (sequence): RNN
(3)利用Multi-task approach结合（1）and （2）
| 文献题目 | 去谷歌学术搜索 | ||||||||||
| Recurrent Collaborative Filtering for Unifying General and Sequential Recommender | |||||||||||
| 文献作者 | Disheng Dong | ||||||||||
| 文献发表年限 | 2018 | ||||||||||
| 文献关键字 | |||||||||||
| multi-task learning ; sequential (item-to-item relations) | |||||||||||
| 摘要描述 | |||||||||||
| General recommender and sequential recommender are two applied modeling paradigms for recommendation tasks. General recommender focuses on modeling the general user preferences, ignoring the sequential patterns in user behaviors, whereas sequential recommender focuses on exploring the item-to-item sequential relations, fail- ing to model the global user preferences. In addition, better recommendation performance has recently been achieved by adopting an approach to combining them. However, the existing approaches are unable to solve both tasks in a unified way and cannot capture the whole historical sequential information. In this paper, we propose a recommendation model named Recurrent Collaborative Filtering (RCF), which unifies both paradigms within a single model. Specifically, we combine recurrent neural network (the sequential recommender part) and matrix factorization model (the general recommender part) in a multi-task learning framework, where we perform joint optimization with shared model parameters enforcing the two parts to regularize each other. Furthermore, we empirically demonstrate on MovieLens and Netflix datasets that our model outperforms the state-of- the-art methods across the tasks of both sequential and general recommender. | |||||||||||
