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Si Zhang

6 accepted papers

2025

HeroFilter: Adaptive Spectral Graph Filter for Varying Heterophilic Relations

NeurIPS 2025poster

Graph heterophily, where connected nodes have different labels, has attracted significant interest recently. Most existing works adopt a simplified approach - using low-pass filters for homophilic graphs and high-pass filters for heterophilic graphs. However, we discover that the relationship betwee…

Cited by 0SourceScholar
2025

Learning Graph Quantized Tokenizers

ICLR 2025poster

Transformers serve as the backbone architectures of Foundational Models, where domain-specific tokenizers allow them to adapt to various domains. Graph Transformers (GTs) have recently emerged as leading models in geometric deep learning, outperforming Graph Neural Networks (GNNs) in various graph l…

2024

Hierarchical Multi-Marginal Optimal Transport for Network Alignment

AAAI 2024technical

Finding node correspondence across networks, namely multi-network alignment, is an essential prerequisite for joint learning on multiple networks. Despite great success in aligning networks in pairs, the literature on multi-network alignment is sparse due to the exponentially growing solution space…

Cited by 19SourcePDFScholar
2024

LLM-Rec: Personalized Recommendation via Prompting Large Language Models

NAACL 2024findings

Text-based recommendation holds a wide range of practical applications due to its versatility, as textual descriptions can represent nearly any type of item. However, directly employing the original item descriptions may not yield optimal recommendation performance due to the lack of comprehensive i…

2024

VCR-Graphormer: A Mini-batch Graph Transformer via Virtual Connections

ICLR 2024poster

Graph transformer has been proven as an effective graph learning method for its adoption of attention mechanism that is capable of capturing expressive representations from complex topological and feature information of graphs. Graph transformer conventionally performs dense attention (or global att…

2023

Do We Really Need Complicated Model Architectures For Temporal Networks?

ICLR 2023top-5%

Recurrent neural network (RNN) and self-attention mechanism (SAM) are the de facto methods to extract spatial-temporal information for temporal graph learning. Interestingly, we found that although both RNN and SAM could lead to a good performance, in practice neither of them is always necessary. In…

Cited by 156SourcePDFScholar