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Haixiang Sun

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#machine learning Preprint Sep 2026

Reliable Replay through Spatial Coherence in Online Continual Learning

This work introduces SPatial coHErent risk control for REplay (SPHERE), a general replay-allocation method applicable across a broad range of learning settings and demonstrates that SPHERE improves accuracy and reduces forgetting across noisy-label vision tasks, continual language-model instruction tuning, and code-gen...

Hai-Xiang Sun, Jie-Fu Zhang, Yi He et al. · 0 citations
#machine learning Preprint Sep 2026

Beyond Empirical Support: Structured Outlier Generation via Sinkhorn Optimal Transport

Outliers are essential for evaluating and improving the robustness of machine learning systems, especially when future distributions may differ significantly from historical training data. In high-stakes applications, robustness often depends on rare cases that finite datasets fail to capture, making simple resampling...

Hai-Xiang Sun, Andrew L. Liu · 0 citations
Open access Jul 2026

Hierarchical causal structure discovery from layered topological orderings

HiTOC is proposed, a Hierarchical Topological Ordering framework for Causal discovery that constructs the global causal structure via layer-wise integration of local orderings over induced subsets by Markov Blanket and achieves state-of-the-art performance in both accuracy and scalability, particularly in high-dimensio...

Haixiang Sun, Pengchao Tian, Zihan Zhou et al. · 0 citations

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