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arXiv 2407.14743cs.IRcs.AI
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面向序列推荐的长短期兴趣去噪

Denoising Long- and Short-term Interests for Sequential Recommendation

Institute of Software, Chinese Academy of Sciences(中国科学院软件研究所);College of Computer Science, Chongqing University(重庆大学计算机学院);University of Chinese Academy of Sciences(中国科学院大学)

Xinyu Zhang, Beibei Li, Beihong Jin

AI总结:

本文提出长短期兴趣去噪网络(LSIDN),通过会话级提取和对比学习分别去噪长期与短期兴趣,在公开数据集上超越现有模型,实现稳健的序列推荐。

摘要:

用户兴趣可以从不同的时间尺度来观察,主要包括稳定的长期偏好和变化的短期意图,二者的结合有助于实现全面的序列推荐。然而,现有专注于用户建模不同时间尺度的工作忽略了不同时间尺度噪声的负面影响,这阻碍了对用户真实兴趣的捕捉,且无法通过传统的序列去噪方法解决。在本文中,我们提出了一种长短期兴趣去噪网络(LSIDN),该网络采用不同的编码器和定制化的去噪策略,分别提取长期和短期兴趣,从而实现全面且稳健的用户建模。具体而言,我们采用会话级兴趣提取与演化策略,以避免在长期兴趣建模中引入跨会话的行为噪声;同时,我们采用配备同质交换增强的对比学习,以减轻无意行为噪声对短期兴趣建模的影响。在两个公开数据集上的实验结果表明,LSIDN始终优于最先进的模型,并实现了显著的稳健性。

英文摘要:

User interests can be viewed over different time scales, mainly including stable long-term preferences and changing short-term intentions, and their combination facilitates the comprehensive sequential recommendation. However, existing work that focuses on different time scales of user modeling has ignored the negative effects of different time-scale noise, which hinders capturing actual user interests and cannot be resolved by conventional sequential denoising methods. In this paper, we propose a Long- and Short-term Interest Denoising Network (LSIDN), which employs different encoders and tailored denoising strategies to extract long- and short-term interests, respectively, achieving both comprehensive and robust user modeling. Specifically, we employ a session-level interest extraction and evolution strategy to avoid introducing inter-session behavioral noise into long-term interest modeling; we also adopt contrastive learning equipped with a homogeneous exchanging augmentation to alleviate the impact of unintentional behavioral noise on short-term interest modeling. Results of experiments on two public datasets show that LSIDN consistently outperforms state-of-the-art models and achieves significant robustness.

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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