GTC: GNN-Transformer Co-contrastive Learning for Self-supervised Heterogeneous Graph Representation

Temel Kavramlar

Combining GNN and Transformer in a collaborative learning scheme can effectively address the over-smoothing problem and improve graph representation.

Özet

The content discusses the development of a novel framework, GTC, that integrates both GNN's local information aggregation and Transformer's global information modeling to eliminate over-smoothing. It proposes Metapath-aware Hop2Token and CG-Hetphormer to encode neighborhood information efficiently. The collaborative contrastive learning between GNN and Transformer enhances self-supervised heterogeneous graph representation.

1. Introduction to Graph Neural Networks (GNNs):

   • GNNs excel at local information aggregation but face challenges like over-smoothing.

2. Advantages of Transformers:

   • Transformers can model global information effectively and are immune to over-smoothing.

3. Proposed Framework - GTC:

   • Combines GNN and Transformer in a collaborative learning scheme.

4. Key Components of GTC:

   • Metapath-aware Hop2Token for efficient transformation.
   • CG-Hetphormer for attentive fusion with GNN.

5. Experimental Results:

   • Show superior performance compared to existing methods on real datasets.

İstatistikler

"As far as we know, this is the first attempt in the field of graph representation learning to utilize both GNN and Transformer to collaboratively capture different view information."
"The experimental results show that the performance of our proposed method is superior to the existing state-of-the-art methods."

Alıntılar

"As far as we know, this is the first attempt in the field of graph representation learning to utilize both GNN and Transformer."
"The experimental results show that the performance of our proposed method is superior to the existing state-of-the-art methods."

Önemli Bilgiler Şuradan Elde Edildi

GTC

by Yundong Sun,... : arxiv.org 03-26-2024

https://arxiv.org/pdf/2403.15520.pdf

Daha Derin Sorular

How can the collaborative learning approach between GNN and Transformer be applied in other domains beyond graph representation

The collaborative learning approach between GNN and Transformer can be applied in various domains beyond graph representation. One potential application is in natural language processing (NLP), where the local information aggregation capability of GNNs can be leveraged to capture syntactic and semantic relationships within sentences or documents, while the global information modeling ability of Transformers can help understand the context and meaning of words or phrases in a larger text corpus. This combined approach could enhance tasks like sentiment analysis, machine translation, and document classification by effectively capturing both local and global features.

What potential drawbacks or limitations might arise from integrating both local information aggregation (GNN) and global information modeling (Transformer)

Integrating both local information aggregation (GNN) and global information modeling (Transformer) may present some drawbacks or limitations. One challenge could be the increased complexity of the model architecture, leading to longer training times and higher computational costs. Balancing the strengths of both approaches while mitigating their weaknesses could also require careful hyperparameter tuning to achieve optimal performance. Additionally, ensuring effective communication between the two branches to avoid redundancy or conflicting representations might pose a challenge.

How might advancements in self-supervised heterogeneous graph representation impact real-world applications outside academia

Advancements in self-supervised heterogeneous graph representation have significant implications for real-world applications outside academia. In industries such as healthcare, this technology could improve patient diagnosis by analyzing complex medical data with diverse attributes like symptoms, test results, and genetic information more accurately. In finance, it could enhance fraud detection systems by identifying anomalous patterns across multiple financial transactions networks efficiently. Moreover, in social media platforms or e-commerce websites, self-supervised heterogeneous graph representation learning can optimize recommendation systems by understanding user preferences based on diverse interactions within networks.