arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.07705cs.IRcs.LG
收藏

基于变分贝叶斯上下文感知的食品推荐表示

Variational Bayesian Context-aware Representation for Grocery Recommendation

University of Glasgow(格拉斯哥大学)

Zaiqiao Meng, Richard McCreadie, Craig Macdonald, Iadh Ounis

摘要:

杂货推荐是一种重要的推荐用例,其目的是根据用户的购物历史来预测用户将来可能选择购买哪些物品。然而,现有的方法只表示每个用户和项目的单确定性点在一个低维连续空间。此外,这些方法中的大多数都是通过使用简单的基于Skip-gram的公式最大化同现可能性来训练的,这限制了它们嵌入的表达能力和由此产生的推荐性能。在本文中,我们提出了变分贝叶斯上下文感知表示(VBCAR)模型的杂货店推荐,这是一种新的变分贝叶斯模型,学习用户和项目的潜在向量,利用购物篮上下文信息,从过去的用户-项目交互。我们训练我们的VBCAR模型的基础上的贝叶斯Skip-gram框架加上摊销变分推理,使它可以学习更多的表达潜在的表示,集成了非线性和贝叶斯行为。在一个大型的真实世界杂货推荐数据集上进行的实验表明,我们提出的VBCAR模型可以显着优于现有的最先进的杂货推荐方法。

英文摘要:

Grocery recommendation is an important recommendation use-case, which aims to predict which items a user might choose to buy in the future, based on their shopping history. However, existing methods only represent each user and item by single deterministic points in a low-dimensional continuous space. In addition, most of these methods are trained by maximizing the co-occurrence likelihood with a simple Skip-gram-based formulation, which limits the expressive ability of their embeddings and the resulting recommendation performance. In this paper, we propose the Variational Bayesian Context-Aware Representation (VBCAR) model for grocery recommendation, which is a novel variational Bayesian model that learns the user and item latent vectors by leveraging basket context information from past user-item interactions. We train our VBCAR model based on the Bayesian Skip-gram framework coupled with the amortized variational inference so that it can learn more expressive latent representations that integrate both the non-linearity and Bayesian behaviour. Experiments conducted on a large real-world grocery recommendation dataset show that our proposed VBCAR model can significantly outperform existing state-of-the-art grocery recommendation methods.

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。

↑