arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.07178cs.IR
收藏

推荐系统中项目的非纠缠表示

Disentangled Item Representation for Recommender Systems

Zeyu Cui, Feng Yu, Shu Wu, Qiang Liu, Liang Wang

摘要:

推荐系统中的项目表示被期望揭示项目的属性。协同推荐方法通常将一个项目表示为一个单个的潜在向量。如今,电子商务平台提供物品的各种属性信息(例如,服装的种类、价格和款式)。利用这些属性信息来更好地表示项目是近年来流行的。一些研究使用给定的属性信息作为边信息,与项目特征向量连接以增强表征。然而,混合项目表示未能充分利用丰富的属性信息或提供解释的推荐系统。为此,我们提出了一种细粒度的解纠缠项目表示(Disentangled Item Representation,缩写为EEE)的推荐系统,在本文中,项目表示为几个独立的属性向量,而不是一个单一的潜在向量。通过这种方式,在属性级别上表示项目,从而可以在推荐中提供项目的细粒度信息。我们引入了一个学习策略,Learnstroke,它可以分配相应的属性向量的项目。我们展示了如何将神经网络应用于两个典型的模型,矩阵分解(MF)和递归神经网络(RNN)。在两个真实数据集上的实验结果表明,该框架下开发的模型是有效的和高效的。即使使用较少的参数,该模型可以优于国家的最先进的方法,特别是在冷启动的情况下。此外,我们做了可视化,以表明我们的主张可以为用户在现实世界中的应用程序提供解释。

英文摘要:

Item representations in recommendation systems are expected to reveal the properties of items. Collaborative recommender methods usually represent an item as one single latent vector. Nowadays the e-commercial platforms provide various kinds of attribute information for items (e.g., category, price and style of clothing). Utilizing these attribute information for better item representations is popular in recent years. Some studies use the given attribute information as side information, which is concatenated with the item latent vector to augment representations. However, the mixed item representations fail to fully exploit the rich attribute information or provide explanation in recommender systems. To this end, we propose a fine-grained Disentangled Item Representation (DIR) for recommender systems in this paper, where the items are represented as several separated attribute vectors instead of a single latent vector. In this way, the items are represented at the attribute level, which can provide fine-grained information of items in recommendation. We introduce a learning strategy, LearnDIR, which can allocate the corresponding attribute vectors to items. We show how DIR can be applied to two typical models, Matrix Factorization (MF) and Recurrent Neural Network (RNN). Experimental results on two real-world datasets show that the models developed under the framework of DIR are effective and efficient. Even using fewer parameters, the proposed model can outperform the state-of-the-art methods, especially in the cold-start situation. In addition, we make visualizations to show that our proposition can provide explanation for users in real-world applications.

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。

↑