Author

Ju-Zheng Zhang

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#artificial intelligence Preprint Sep 2026

Don't Mask the Environment: Observation Supervision Changes How Agents Explore Under RL

This work introduces ActObs, which also supervises the observation tokens already present in each trajectory, and traces this difference to SFT: action and observation gradients rapidly become orthogonal, while action-only training leaves a large residual observation gradient and degrades environment prediction below t...

Juzheng Zhang, Disha Makhija, Manoj Ghuhan Arivazhagan et al. · 0 citations

Open access Aug 2026

Spatiotemporal Compositional Active Sampling for Physics-Informed Neural Networks

In comparison experiments designed for two transfer tasks and matched for main PINN training budgets, STCAS achieves the lowest aggregate mean reported error among the compared methods for both a steady convection–diffusion equation and a nonlinear time-dependent Burgers equation.

Ju-Zheng Zhang, Shi-Yang Li, Tao Zhu et al. · Mathematics · 0 citations