西安电子科技大学学报 ›› 2025, Vol. 52 ›› Issue (1): 163-180.doi: 10.19665/j.issn1001-2400.20241101

• 计算机科学与技术 & 网络空间安全 • 上一篇    下一篇

端到端异构图信息协同过滤推荐

陈宸(), 成蓉(), 宋彬()   

  1. 西安电子科技大学 空天地一体化综合业务网全国重点实验室,陕西 西安 710071

End-to-end heterogeneous graph information collaborative filtering for recommendation

CHEN Chen(), CHENG Rong(), SONG Bin()   

  1. State Key Laboratory of Integrated Services Networks,Xidian University,Xi’an 710071,China
  • Received:2024-05-11 Online:2024-11-19 Published:2024-11-19

摘要:

知识图谱(KG)在挖掘推荐场景中项目之间高阶关系方面逐渐成为一项重要趋势。尽管一些基于知识图谱的模型,如知识图注意网络(KGAT),能够有效建模一阶关系,但它们面临着无法对高阶关系中的协作信息进行建模的挑战。此外,现有的基于知识图谱的模型将交互行为简化为一种知识图谱关系,直接将用户-项目二分图与知识图融合成为一个整合图,却忽略了图结构之间的异构性,导致无法充分保留图内特定属性。在这项研究中,深入分析了交互行为和关系链接之间的潜在差异与联系,并提出了一种名为异构图信息协同过滤(HGICF)的创新消息传播机制。该机制能够将用户-项目行为和知识图谱辅助信息的协作特征有效传播到一个综合的模型中。这一解决方案不仅维持了图内属性的依赖关系,而且有助于跨图信息的有效聚合。为了深刻理解知识图谱和二部图之间的协作关系,进一步提出了共享特征协同过滤层,该层能够根据不同的数据结构和需求设置不同的层级。实验结果表明,HGICF在性能上显著优于当前方法。

关键词: 信息系统, 推荐系统, 图神经网络, 知识图谱, 协作过滤

Abstract:

Knowledge Graphs(KG) have emerged as a pivotal trend in uncovering intricate relations between items within recommendation scenarios.While models such as the Knowledge Graph Attention Network(KGAT) focus on establishing first-order relations,their limitations become apparent when attempting to capture collaborative information inherent in high-order relations.Existing KG-based models,including the KGAT,often treat interactive behavior as a mere KG relation.They seamlessly fuse user-item bipartite graphs with knowledge graphs into a unified fusion graph,but neglect the inherent heterogeneity between graph structures.This oversight results in a weakened ability to preserve graph-specific properties.In response to these challenges,we delve into a comprehensive analysis of the latent disparities and connections between user-item interactions and relation links.We introduce a groundbreaking message propagation mechanism known as Heterogeneous Graph Information Collaborative Filtering(HGICF).This mechanism seamlessly propagates collaborative features derived from user-item behaviors and KG side information within a unified model.Unlike existing approaches,HGICF not only upholds the intrinsic attributes of inner-graph structures but also facilitates the aggregation of cross-graph information.To gain a deeper understanding of the collaborative dynamics between knowledge graphs and bipartite graphs,we introduce shared feature collaborative filtering layers.These layers are designed to adapt to various data structures and requirements by allowing different layers to be set based on the specificities of the underlying information,which leads to a flexible and adaptive model capable of capturing the nuances of diverse data sources.Extensive experiments conducted validate the superior performance of HGICF over existing state-of-the-art methods.The proposed model excels in preserving the intricate relationships within knowledge graphs and bipartite graphs,showcasing its efficacy in collaborative filtering scenarios.By addressing the limitations of current KG-based models,HGICF stands as a significant advancement in the realm of recommendation systems,offering a more robust and nuanced approach to collaborative information modeling.

Key words: information systems, recommendation system, graph neural network, knowledge graph, collaborative filtering

中图分类号: 

  • TP181