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Weimin Wu

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#artificial intelligence Preprint Oct 2026

D-DOIT: Training-free Adaptation of Discrete Diffusion via Doob's h-Transform

We propose D-DOIT (Discrete Doob-Oriented Inference-time Transformation), a training-free and efficient adaptation method for discrete diffusion models with generic rewards. D-DOIT formulates adaptation as sampling from a reward-tilted target distribution and realizes this transport through Doob's h-transform of the di...

Jie-Ke Wu, Qi-Jie Zhu, Wei-Min Wu et al. · 0 citations
Book Open access Aug 2026

POLO: Preference-Guided Multi-Turn Reinforcement Learning for Sample-Efficient Lead Optimization

Lead optimization in drug discovery requires iteratively refining molecular candidates while preserving structural similarity to the original compound. Since each evaluation is costly, sample efficiency, the ability to achieve strong performance with limited oracle calls, becomes critical. Existing methods, from geneti...

Ziqing Wang, Yibo Wen, William Pattie et al. · 0 citations
Book Open access Aug 2026

POLO: Preference-Guided Multi-Turn Reinforcement Learning for Sample-Efficient Lead Optimization

Lead optimization in drug discovery requires iteratively refining molecular candidates while preserving structural similarity to the original compound. Since each evaluation is costly, sample efficiency, the ability to achieve strong performance with limited oracle calls, becomes critical. Existing methods, from geneti...

Ziqing Wang, Yibo Wen, William Pattie et al. · 0 citations

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