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arXiv 2203.15876cs.IR
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面向推荐系统的自监督学习:一项综述

Self-Supervised Learning for Recommender Systems: A Survey

Junliang Yu, Hongzhi Yin, Xin Xia, Tong Chen, Jundong Li, Zi Huang

AI总结:

本文综述自监督推荐研究,提出SSR定义与四类方法分类体系,并发布开源库SELFRec,通过实验总结自监督信号选择的发现及未来方向。

摘要:

近年来,基于神经架构的推荐系统取得了巨大成功,但在处理高度稀疏的数据时仍未达到预期。自监督学习(SSL)作为一种从无标签数据中学习的新兴技术,作为解决该问题的潜在方案受到了广泛关注。本综述对自监督推荐(SSR)方面的研究工作进行了系统且及时的回顾。具体而言,我们提出了SSR的专门定义,并在此基础上构建了全面的分类体系,将现有SSR方法划分为四类:对比式、生成式、预测式和混合式。对于每一类,我们阐明其概念与形式化、所涉及的方法及其优缺点。此外,为便于实证比较,我们发布了开源库SELFRec(https://github.com/Coder-Yu/SELFRec),其中纳入了大量SSR模型和基准数据集。通过使用该库进行严谨实验,我们得出并报告了一些关于选择自监督信号以增强推荐的重要发现。最后,我们阐明了当前研究的局限性,并概述了未来的研究方向。

英文摘要:

In recent years, neural architecture-based recommender systems have achieved tremendous success, but they still fall short of expectation when dealing with highly sparse data. Self-supervised learning (SSL), as an emerging technique for learning from unlabeled data, has attracted considerable attention as a potential solution to this issue. This survey paper presents a systematic and timely review of research efforts on self-supervised recommendation (SSR). Specifically, we propose an exclusive definition of SSR, on top of which we develop a comprehensive taxonomy to divide existing SSR methods into four categories: contrastive, generative, predictive, and hybrid. For each category, we elucidate its concept and formulation, the involved methods, as well as its pros and cons. Furthermore, to facilitate empirical comparison, we release an open-source library SELFRec (https://github.com/Coder-Yu/SELFRec), which incorporates a wide range of SSR models and benchmark datasets. Through rigorous experiments using this library, we derive and report some significant findings regarding the selection of self-supervised signals for enhancing recommendation. Finally, we shed light on the limitations in the current research and outline the future research directions.

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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