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arXiv 1906.09217cs.IR
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用于顺序推荐的分层选通网络

Hierarchical Gating Networks for Sequential Recommendation

Chen Ma, Peng Kang, Xue Liu

摘要:

用户-项目交互的时间顺序是许多推荐系统中的关键特征,其中用户将交互的项目可能在很大程度上取决于用户最近访问的那些项目。然而,随着用户和项目的大量增加,顺序推荐系统仍然面临着一些挑战性的问题:(1)从稀疏隐式反馈建模的长期用户兴趣的困难;(2)捕捉短期用户兴趣给定的几个项目,用户刚刚访问的困难。为了应对这些挑战,我们提出了一个分层门控网络(HGN),集成了贝叶斯个性化排名(BPR),以捕捉长期和短期的用户兴趣。我们的HGN包括一个功能门控模块,一个实例门控模块,和一个项目-项目产品模块。特别是,我们的特征门控和实例门控模块分别从特征和实例级别选择可以传递到下游层的项特征。我们的项目-项目产品模块明确地捕获了用户过去访问的项目和用户将来访问的项目之间的项目关系。我们使用几种最先进的方法和五个真实世界数据集的不同验证指标对我们的模型进行了广泛的评估。实验结果证明了该模型在Top-N顺序推荐中的有效性。

英文摘要:

The chronological order of user-item interactions is a key feature in many recommender systems, where the items that users will interact may largely depend on those items that users just accessed recently. However, with the tremendous increase of users and items, sequential recommender systems still face several challenging problems: (1) the hardness of modeling the long-term user interests from sparse implicit feedback; (2) the difficulty of capturing the short-term user interests given several items the user just accessed. To cope with these challenges, we propose a hierarchical gating network (HGN), integrated with the Bayesian Personalized Ranking (BPR) to capture both the long-term and short-term user interests. Our HGN consists of a feature gating module, an instance gating module, and an item-item product module. In particular, our feature gating and instance gating modules select what item features can be passed to the downstream layers from the feature and instance levels, respectively. Our item-item product module explicitly captures the item relations between the items that users accessed in the past and those items users will access in the future. We extensively evaluate our model with several state-of-the-art methods and different validation metrics on five real-world datasets. The experimental results demonstrate the effectiveness of our model on Top-N sequential recommendation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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