arXiv:2501.04161cs.LGcs.IR2025-01被引 4

通过显式融合关系信息,提升推荐系统的透明度与准确性。

KGIF: Optimizing Relation-Aware Recommendations with Knowledge Graph Information Fusion

  • 设计自注意力机制显式融合实体与关系嵌入
  • 在稀疏知识图谱下仍保持高推荐性能
  • 支持可解释路径可视化,适合需要透明推荐的场景

尽管深度学习推荐系统表现优异,但在真实环境中的适应性受限于对用户-项目关系数据利用不足及推荐过程缺乏透明度。传统协同过滤难以整合多维项目属性,因子分解机虽考虑项目细节却忽略更广泛的关系模式。基于协同知识图谱的模型虽通过嵌入用户-项目交互与项目属性关系提供整体视角,但常隐式聚合数据,导致关系细节未被充分利用。本文提出知识图谱注意力网络与信息融合(KGIF)框架,通过定制自注意力机制显式融合实体与关系嵌入,并引入动态投影向量实现嵌入自适应,增强用户-项目交互与项目属性关系的互动,实现用户与项目双重视角的精细平衡。此外,注意力传播机制优化知识图谱嵌入,捕捉多层次交互模式。贡献包括:一种创新的显式信息融合方法、稀疏知识图谱下的鲁棒性提升,以及通过可解释路径可视化生成可解释推荐。

原文摘要 · Abstract (English)

While deep-learning-enabled recommender systems demonstrate strong performance benchmarks, many struggle to adapt effectively in real-world environments due to limited use of user-item relationship data and insufficient transparency in recommendation generation. Traditional collaborative filtering approaches fail to integrate multifaceted item attributes, and although Factorization Machines account for item-specific details, they overlook broader relational patterns. Collaborative knowledge graph-based models have progressed by embedding user-item interactions with item-attribute relationships, offering a holistic perspective on interconnected entities. However, these models frequently aggregate attribute and interaction data in an implicit manner, leaving valuable relational nuances underutilized. This study introduces the Knowledge Graph Attention Network with Information Fusion (KGIF), a specialized framework designed to merge entity and relation embeddings explicitly through a tailored self-attention mechanism. The KGIF framework integrates reparameterization via dynamic projection vectors, enabling embeddings to adaptively represent intricate relationships within knowledge graphs. This explicit fusion enhances the interplay between user-item interactions and item-attribute relationships, providing a nuanced balance between user-centric and item-centric representations. An attentive propagation mechanism further optimizes knowledge graph embeddings, capturing multi-layered interaction patterns. The contributions of this work include an innovative method for explicit information fusion, improved robustness for sparse knowledge graphs, and the ability to generate explainable recommendations through interpretable path visualization.

推荐系统知识图谱可解释性注意力机制

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