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Zhang-Wei Hong

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#artificial intelligence Preprint Oct 2024

Large Pretraining Datasets Don't Guarantee Robustness after Fine-Tuning in Image Classification

It is found that though continual learning methods help, fine-tuning reduces robustness across pretrained models, suggesting that starting with the strongest foundation model is not necessarily the best approach for performance on specialist tasks.

Jaedong Hwang, Brian Cheung, Zhang-Wei Hong et al. · 0 citations

Prompt-Driven Exploration

Across manipulation and reasoning tasks, PDE enables RL to learn successful policies even from zero-reward starts, and improves sample efficiency more broadly.

Sunshine Jiang, John Marangola, David W. Zhang et al. · 0 citations

Learning More from Less: Reinforcement Learning from Hindsight

Learning from Hindsight is presented, which brings hindsight relabeling to RL post-training of VLAs by scoring failed rollouts against the tasks they actually achieved, and achieves 5 times improvement in sample efficiency, and outperforms a dense progress-reward baseline on out-of-distribution LIBERO-PRO tasks.

Iris Xu, Sunshine Jiang, John Marangola et al. · 0 citations

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