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arXiv 2201.09490cs.IR
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用于物品推荐的双偏好分布学习

Dual Preference Distribution Learning for Item Recommendation

Xue Dong, Xuemeng Song, Na Zheng, Yinwei Wei, Zhongzhou Zhao

AI总结:

提出双偏好分布学习框架DUPLE,联合学习用户总体偏好和特定属性偏好,在六个数据集上验证了推荐有效性与可解释性。

摘要:

推荐系统可以自动向用户推荐他们可能喜欢的物品。其目标是通过有效表示用户和物品来对用户-物品交互进行建模。现有方法主要使用向量化表示来学习用户偏好和物品特征,并通过它们之间的交互来建模用户对物品的总体偏好。事实上,用户对物品属性有其特定偏好,且不同偏好通常是不同的。因此,探索细粒度偏好并建模用户不同偏好之间的关系可以提升推荐性能。为此,我们提出了双偏好分布学习框架(DUPLE),旨在为给定用户联合学习一个总体偏好分布和一个特定偏好分布,前者对应用户对物品的总体偏好,后者指用户对物品属性的特定偏好。值得注意的是,高斯分布的均值向量可以捕捉用户的偏好,协方差矩阵可以学习它们之间的关系。此外,我们可以为每个用户总结一个偏好属性画像,以描述其偏好的物品属性。然后,我们可以通过检查推荐物品的属性与用户偏好属性画像之间的重叠情况,为每个推荐物品提供解释。在六个公开数据集上的大量定量和定性实验证明了DUPLE方法的有效性和可解释性。

英文摘要:

Recommender systems can automatically recommend users with items that they probably like. The goal of them is to model the user-item interaction by effectively representing the users and items. Existing methods have primarily learned the user's preferences and item's features with vectorized embeddings, and modeled the user's general preferences to items by the interaction of them. In fact, users have their specific preferences to item attributes and different preferences are usually related. Therefore, exploring the fine-grained preferences as well as modeling the relationships among user's different preferences could improve the recommendation performance. Toward this end, we propose a dual preference distribution learning framework (DUPLE), which aims to jointly learn a general preference distribution and a specific preference distribution for a given user, where the former corresponds to the user's general preference to items and the latter refers to the user's specific preference to item attributes. Notably, the mean vector of each Gaussian distribution can capture the user's preferences, and the covariance matrix can learn their relationship. Moreover, we can summarize a preferred attribute profile for each user, depicting his/her preferred item attributes. We then can provide the explanation for each recommended item by checking the overlap between its attributes and the user's preferred attribute profile. Extensive quantitative and qualitative experiments on six public datasets demonstrate the effectiveness and explainability of the DUPLE method.

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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