arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.12118cs.IR
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序列间增强的个性化序列推荐框架

Inter-sequence Enhanced Framework for Personalized Sequential Recommendation

Feng Liu, Weiwen Liu, Xutao Li, Yunming Ye

摘要:

对用户历史交互行为的序列相关性建模是序列推荐的关键。然而,大多数的方法主要集中在每个单独的序列内的\emph{intra-sequence}项目相关性建模,但忽略了跨不同的用户交互序列的\emph{inter-sequence}项目相关性。虽然一些研究已经意识到这个问题,但他们的方法要么简单,要么隐含。为了更好地利用这些信息,我们提出了一个序列间增强的顺序推荐(ISSR)框架。在ISSR中,同时考虑序列间和序列内项目的相关性。首先,我们在序列间相关性编码器中配备图神经网络,以从用户-项目二分图和项目-项目图中捕获高阶项目相关性。然后,在序列间相关性编码器的基础上,在序列内相关性编码器中构建GRU网络和注意力网络,对每个序列内的项目序列相关性和时间动态进行建模,预测用户对候选项目的偏好。此外,我们在三个真实世界的数据集上进行了广泛的实验。实验结果表明,ISSR方法优于许多国家的最先进的方法和有效的序列间相关编码器。

英文摘要:

Modeling the sequential correlation of users' historical interactions is essential in sequential recommendation. However, the majority of the approaches mainly focus on modeling the \emph{intra-sequence} item correlation within each individual sequence but neglect the \emph{inter-sequence} item correlation across different user interaction sequences. Though several studies have been aware of this issue, their method is either simple or implicit. To make better use of such information, we propose an inter-sequence enhanced framework for the Sequential Recommendation (ISSR). In ISSR, both inter-sequence and intra-sequence item correlation are considered. Firstly, we equip graph neural networks in the inter-sequence correlation encoder to capture the high-order item correlation from the user-item bipartite graph and the item-item graph. Then, based on the inter-sequence correlation encoder, we build GRU network and attention network in the intra-sequence correlation encoder to model the item sequential correlation within each individual sequence and temporal dynamics for predicting users' preferences over candidate items. Additionally, we conduct extensive experiments on three real-world datasets. The experimental results demonstrate the superiority of ISSR over many state-of-the-art methods and the effectiveness of the inter-sequence correlation encoder.

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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