通过融合去噪与增强,提升社交推荐中多语义信息建模效果。
Burger: Robust Graph Denoising-augmentation Fusion and Multi-semantic Modeling in Social Recommendation
- 构建社交张量平滑训练过程,融合图卷积与张量卷积捕捉用户偏好。
- 引入双向语义协调损失,建模社交网络与用户-物品交互的互影响。
- 用贝叶斯后验挖掘潜在关系,替换噪声社交连接,适合高噪声社交推荐场景。
在社交媒体快速发展的背景下,社交推荐系统作为混合推荐系统已广泛应用。现有方法虽能通过捕捉用户兴趣相似性过滤无关社交关系以提升准确率,但对社交网络与用户-物品交互网络间语义信息的相互影响研究不足。为此,本文提出一种鲁棒图去噪-增强融合与多语义建模的社交推荐模型Burger。首先构建社交张量以平滑模型训练;接着分别使用图卷积网络和张量卷积网络捕捉用户对物品的偏好与社交偏好;针对两类网络中语义信息差异,设计双向语义协调损失以建模其互影响;为缓解无关兴趣关系对多语义建模的干扰,采用贝叶斯后验概率挖掘潜在社交关系以替代噪声;最后通过滑动窗口机制更新社交张量作为下一轮输入。在三个真实数据集上的大量实验表明,Burger性能优于当前最先进模型。
原文摘要 · Abstract (English)
In the era of rapid development of social media, social recommendation systems as hybrid recommendation systems have been widely applied. Existing methods capture interest similarity between users to filter out interest-irrelevant relations in social networks that inevitably decrease recommendation accuracy, however, limited research has a focus on the mutual influence of semantic information between the social network and the user-item interaction network for further improving social recommendation. To address these issues, we introduce a social \underline{r}ecommendation model with ro\underline{bu}st g\underline{r}aph denoisin\underline{g}-augmentation fusion and multi-s\underline{e}mantic Modeling(Burger). Specifically, we firstly propose to construct a social tensor in order to smooth the training process of the model. Then, a graph convolutional network and a tensor convolutional network are employed to capture user's item preference and social preference, respectively. Considering the different semantic information in the user-item interaction network and the social network, a bi-semantic coordination loss is proposed to model the mutual influence of semantic information. To alleviate the interference of interest-irrelevant relations on multi-semantic modeling, we further use Bayesian posterior probability to mine potential social relations to replace social noise. Finally, the sliding window mechanism is utilized to update the social tensor as the input for the next iteration. Extensive experiments on three real datasets show Burger has a superior performance compared with the state-of-the-art models.
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