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Wen-Tao Zhang

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#machine learning Preprint Jul 2026

SAGG: Sample-Adaptive Gradient Gating for Robust Multimodal Learning under Heterogeneous Corruption

It is proved that any batch-level sample-agnostic linear estimator with a shared modulation parameter incurs an irreducible bias with respect to the clean-data gradient, and that sample-level all-or-nothing gating is the unique unbiased strategy within a natural distribution-free estimator class.

Wen-Tao Zhang, Yi-Fan Zhu, Yu-Tong Zhang et al. · 0 citations
Jul 2026

Data-Dependent Regret and Polyak Corrections for Constrained Online Convex Optimization

AdaOGD-PFS is proposed, an adaptive-step-size method that achieves O(sqrt(G_T) regret with per-round feasibility while preserving per-round feasibility and identifies a nonnegative Polyak correction P_T that enters the regret bound with a negative sign.

Wen-Tao Zhang · 0 citations

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