arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.09269cs.IRcs.LG
收藏

基于动态记忆的注意力网络顺序推荐算法

Dynamic Memory based Attention Network for Sequential Recommendation

Texas A&M University(德克萨斯A&M大学);Alibaba Group(阿里巴巴集团);The Hong Kong Polytechnic University(香港理工大学)

Qiaoyu Tan, Jianwei Zhang, Ninghao Liu, Xiao Huang, Hongxia Yang, Jingren Zhou, Xia Hu

摘要:

顺序推荐在各种在线服务中变得越来越重要。它旨在从用户的历史交互中建模用户的动态偏好,并预测他们的下一个项目。真实系统上积累的用户行为记录可能会很长。这些丰富的数据为跟踪用户的实际兴趣带来了机会。先前的努力主要集中在基于相对较新的行为提出建议。然而,由于早期的交互可能会影响用户当前的选择,因此整体顺序数据可能无法得到有效利用。此外,由于现实世界的系统需要短的响应时间,因此在为每个用户执行推理时扫描整个行为序列变得不可容忍。为了弥补这一不足,我们提出了一种新的长序列推荐模型,称为动态基于记忆的注意力网络(DMAN)。它将整个长行为序列分割成一系列子序列,然后训练模型并维护一组内存块以保存用户的长期兴趣。为了提高记忆保真度,DMAN动态地抽象每个用户的长期兴趣到自己的记忆块,通过最小化的辅助重建损失。基于动态记忆,用户的短期和长期兴趣可以显式地提取和组合的有效联合推荐。四个基准数据集的实证结果表明,我们的模型在捕获长期依赖性方面优于各种最先进的序列模型。

英文摘要:

Sequential recommendation has become increasingly essential in various online services. It aims to model the dynamic preferences of users from their historical interactions and predict their next items. The accumulated user behavior records on real systems could be very long. This rich data brings opportunities to track actual interests of users. Prior efforts mainly focus on making recommendations based on relatively recent behaviors. However, the overall sequential data may not be effectively utilized, as early interactions might affect users' current choices. Also, it has become intolerable to scan the entire behavior sequence when performing inference for each user, since real-world system requires short response time. To bridge the gap, we propose a novel long sequential recommendation model, called Dynamic Memory-based Attention Network (DMAN). It segments the overall long behavior sequence into a series of sub-sequences, then trains the model and maintains a set of memory blocks to preserve long-term interests of users. To improve memory fidelity, DMAN dynamically abstracts each user's long-term interest into its own memory blocks by minimizing an auxiliary reconstruction loss. Based on the dynamic memory, the user's short-term and long-term interests can be explicitly extracted and combined for efficient joint recommendation. Empirical results over four benchmark datasets demonstrate the superiority of our model in capturing long-term dependency over various state-of-the-art sequential models.

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。

↑