Generalizable dynamic graph anomaly detection (DGAD) enables pretrained detectors to identify anomalies in unseen target domains without costly retraining. However, existing methods often fail for two reasons.
arXiv:2608. 19858v1 Announce Type: new Abstract: Generalizable dynamic graph anomaly detection (DGAD) enables pretrained detectors to identify anomalies in unseen target domains without costly retraining.
By Jialun Zheng, Hanchen Yang, Jiannong Cao, Yankai Chen, Yuanjing Feng, Philip S. Yu
arXiv:2606. 30011v1 Announce Type: cross Abstract: Graph Neural Networks (GNNs) deployed in real-world systems typically have fixed weights, often leading to degraded performance under distribution shifts.
By Huy Truong, Alexander Lazovik, Victoria Degeler
Efficient Memory Crystallization (EMC) is a training‑free, test‑time framework that transforms each incoming graph domain into a compact, semantically faithful memory via a closed‑form distribution‑matching solution. By eliminating the need for auxiliary generative modules, EMC reduces redundant domain information and models inter‑domain dependencies through state‑evolving memories, yielding a tighter generalization error bound. Experiments show EMC outperforms state‑of‑the‑art baselines on non‑stationary graph data, cutting average runtime by 87.4% and GPU memory usage by 92.4% compared to a recent competitor.
By Yue Hou, Ruomei Liu, Yingke Su, Junran Wu, Ke Xu
This paper introduces TestDG, an online test-time domain generalization framework for continual test-time adaptation (CTTA). TestDG learns features invariant to both current and past test domains during testing, using a new model architecture, adaptation strategy, and prototype selection/update mechanisms. It achieves state‑of‑the‑art results on four CTTA benchmarks and demonstrates superior generalization to unseen test domains.
By Sohyun Lee, Nayeong Kim, Juwon Kang, Seong Joon Oh, Suha Kwak
Deep neural nets achieve remarkable performance when training and test data share the same distribution, but this assumption frequently breaks in real-world deployment, where data undergoes continual distributional shifts. Continual Test-Time Adaptation (CTTA) addresses this challenge by adapting pretrained models to non-stationary target distributions on-the-fly, without access to source data or labeled targets, while mitigating two critical failure modes: catastrophic forgetting of source knowledge and error accumulation from noisy pseudo-labels over extended time horizons.