arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.11588cs.IR
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用于推荐的层次审查图表示学习

Learning Hierarchical Review Graph Representations for Recommendation

Yong Liu, Susen Yang, Yinan Zhang, Chunyan Miao, Zaiqing Nie, Juyong Zhang

摘要:

用户评论数据已被证明是有效的,在解决不同的推荐问题。以前的基于评论的推荐方法通常采用复杂的组合模型,如递归神经网络(RNN)和卷积神经网络(CNN),从评论数据中学习语义表示以进行推荐。然而,这些方法主要捕获词窗口中相邻词之间的局部依赖性,并且它们平等地对待每个评论。因此,它们可能无法有效地捕获单词之间的全局依赖性,并且往往容易受到噪声评论信息的影响。在本文中,我们提出了一种新的基于评论的推荐模型,命名为评论图神经网络(RGNN)。具体来说,RGNN为每个用户/项目构建了一个特定的评论图,它提供了一个关于用户/项目属性的全局视图,以帮助削弱噪音评论信息造成的偏见。提出了一种类型感知的图注意力机制来学习词的语义嵌入。此外,提出了一种个性化的图池算子来学习评论图的分层表示,以形成每个用户/项目的语义表示。我们在两个真实世界的数据集上将RGNN与最先进的基于评论的推荐方法进行了比较。实验结果表明,在均方误差(MSE)方面,RGNN始终优于基线方法。

英文摘要:

The user review data have been demonstrated to be effective in solving different recommendation problems. Previous review-based recommendation methods usually employ sophisticated compositional models, such as Recurrent Neural Networks (RNN) and Convolutional Neural Networks (CNN), to learn semantic representations from the review data for recommendation. However, these methods mainly capture the local dependency between neighbouring words in a word window, and they treat each review equally. Therefore, they may not be effective in capturing the global dependency between words, and tend to be easily biased by noise review information. In this paper, we propose a novel review-based recommendation model, named Review Graph Neural Network (RGNN). Specifically, RGNN builds a specific review graph for each individual user/item, which provides a global view about the user/item properties to help weaken the biases caused by noise review information. A type-aware graph attention mechanism is developed to learn semantic embeddings of words. Moreover, a personalized graph pooling operator is proposed to learn hierarchical representations of the review graph to form the semantic representation for each user/item. We compared RGNN with state-of-the-art review-based recommendation approaches on two real-world datasets. The experimental results indicate that RGNN consistently outperforms baseline methods, in terms of Mean Square Error (MSE).

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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