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Luzhi Wang

5 accepted papers

2026

From Subtle to Significant: Prompt-Driven Self-Improving Optimization in Test-Time Graph OOD Detection

AAAI 2026technical

Graph Out-of-Distribution (OOD) detection aims to identify whether a test graph deviates from the distribution of graphs observed during training, which is critical for ensuring the reliability of Graph Neural Networks (GNNs) when deployed in open-world scenarios. Recent advances in graph OOD detect

Cited by 0SourcePDFScholar
2026

GraphSculptor: Sculpting Pre-training Core Sets for Graph Self-supervised Learning

IJCAI 2026

Graph self-supervised learning (SSL) typically relies on large-scale unlabeled datasets, heavily inflating computational costs. However, empirical evidence suggests that these datasets contain substantial redundancy—our analysis reveals that uniformly subsampling 50% of graphs retains over 96% of do

Cited by 0Scholar
2025

Stealthy Yet Effective: Distribution-Preserving Backdoor Attacks on Graph Classification

NeurIPS 2025poster

Graph Neural Networks (GNNs) have demonstrated strong performance across tasks such as node classification, link prediction, and graph classification, but remain vulnerable to backdoor attacks that implant imperceptible triggers during training to control predictions. While node-level attacks exploi…

Cited by 0SourcecodeScholar
2024

GOODAT: Towards Test-Time Graph Out-of-Distribution Detection

AAAI 2024technical

Graph neural networks (GNNs) have found widespread application in modeling graph data across diverse domains. While GNNs excel in scenarios where the testing data shares the distribution of their training counterparts (in distribution, ID), they often exhibit incorrect predictions when confronted wi…

2022

CGMN: A Contrastive Graph Matching Network for Self-Supervised Graph Similarity Learning

IJCAI 2022poster

Graph similarity learning refers to calculating the similarity score between two graphs, which is required in many realistic applications, such as visual tracking, graph classification, and collaborative filtering. As most of the existing graph neural networks yield effective graph representations o…