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cs.LG2023★ 1 cited
Graph-level Anomaly Detection via Hierarchical Memory Networks
Chaoxi Niu, Guansong Pang, Ling Chen
Graph-level anomaly detection aims to identify abnormal graphs that exhibit deviant structures and node attributes compared to the majority in a graph set. One primary challenge is…
cs.LG2023
Affinity Uncertainty-based Hard Negative Mining in Graph Contrastive Learning
Chaoxi Niu, Guansong Pang, Ling Chen
Hard negative mining has shown effective in enhancing self-supervised contrastive learning (CL) on diverse data types, including graph CL (GCL). The existing hardness-aware CL meth…