Yi Zhang

SEP 9, 2026 · PREPRINT

Field-level prediction of mid-plane stress tensor fields in concrete target penetration: a cross-velocity graph neural operator surrogate

arXiv

This is a physics-informed machine learning surrogate model study using synthetic data from computational simulation, not experimental validation or clinical/translational endpoints; it demonstrates feasibility and speedup within a bounded parameter space but lacks independent experimental verification and generalizability outside the studied configurations.

AUG 11, 2026 · PREPRINT

Threshold Structure of Optimal Policies in Restart POMDPs

arXiv

This is a theoretical mathematical analysis establishing optimal policy structures in a decision-making framework; it advances understanding of algorithmic properties but does not present empirical evidence, clinical outcomes, or data from real-world applications.