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Author

A. Chaudhuri

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#artificial intelligence Preprint Oct 2026

Multi-Fidelity Policy Gradients Stabilize Data-Scarce Reinforcement Learning

Policy gradient methods for on-policy reinforcement learning (RL) can become unstable when expensive, scarce target-domain data yield noisy gradient estimates. We address this challenge by complementing limited high-fidelity (HF) target-domain data with abundant, cheap, but biased low-fidelity (LF) data, e.g., from a s...

Xin-Jie Liu, Rui-Han Zhao, A. Chaudhuri et al. · 0 citations
#machine learning Open access Dec 2025

Active Learning for Data-Driven Reduced Models of Parametric Differential Systems with Bayesian Operator Inference

This work establishes a probabilistic version of parametric operator inference, casting the learning problem as a Bayesian linear regression, and designs a sequential adaptive sampling scheme to select new training parameter vectors that promote ROM stability and accuracy globally in the parameter domain.

Shane A. Mcquarrie, Meng-Wu Guo, A. Chaudhuri · 1 citation

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