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arXiv 2406.04828cs.IR
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QAGCF:面向问答推荐的图协同过滤

QAGCF: Graph Collaborative Filtering for Q&A Recommendation

Changshuo Zhang, Teng Shi, Xiao Zhang, Yanping Zheng, Ruobing Xie, Qi Liu, Jun Xu, Ji-Rong Wen

AI总结:

针对问答推荐中协同与语义信息纠缠问题,提出图神经网络模型 QAGCF,通过协同视图、语义视图和全局图解耦并整合信息,结合多项式图滤波与对比学习,在多个数据集上取得最优性能。

摘要:

问答(Q&A)平台通常推荐问答对以满足用户的知识获取需求,这与传统推荐中只推荐单个条目的做法不同。这使得用户行为更加复杂,并为问答推荐带来两个挑战:其一是协同信息纠缠,即用户反馈既可能受到问题的影响,也可能受到答案的影响;其二是语义信息纠缠,即问题与其对应答案之间存在关联,同时不同问答对之间也存在关联。传统推荐方法将问答对视为一个整体,或仅将答案作为单个条目来考虑,这忽视了两个挑战,无法有效建模用户兴趣。为解决这些挑战,我们提出了 Question & Answer Graph Collaborative Filtering(QAGCF),这是一种图神经网络模型,它为协同视图和语义视图分别构建图,以解耦问答对中的信息。协同视图将问题和答案解耦,以分别建模协同信息;语义视图则捕获问答对内部以及问答对之间的语义信息。这些视图进一步合并为一个全局图,以整合协同信息和语义信息。采用基于多项式的图滤波器来解决全局图的高度异质性问题。此外,在训练过程中利用对比学习来获得鲁棒的嵌入表示。在工业数据集和公开数据集上的大量实验表明,QAGCF 持续优于基线方法,并取得了最先进的结果。

英文摘要:

Question and answer (Q&A) platforms usually recommend question-answer pairs to meet users' knowledge acquisition needs, unlike traditional recommendations that recommend only one item. This makes user behaviors more complex, and presents two challenges for Q&A recommendation, including: the collaborative information entanglement, which means user feedback is influenced by either the question or the answer; and the semantic information entanglement, where questions are correlated with their corresponding answers, and correlations also exist among different question-answer pairs. Traditional recommendation methods treat the question-answer pair as a whole or only consider the answer as a single item, which overlooks the two challenges and cannot effectively model user interests. To address these challenges, we introduce Question & Answer Graph Collaborative Filtering (QAGCF), a graph neural network model that creates separate graphs for collaborative and semantic views to disentangle the information in question-answer pairs. The collaborative view disentangles questions and answers to individually model collaborative information, while the semantic view captures the semantic information both within and between question-answer pairs. These views are further merged into a global graph to integrate the collaborative and semantic information. Polynomial-based graph filters are used to address the high heterophily issues of the global graph. Additionally, contrastive learning is utilized to obtain robust embeddings during training. Extensive experiments on industrial and public datasets demonstrate that QAGCF consistently outperforms baselines and achieves state-of-the-art results.

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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