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Wei Peng

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#artificial intelligence Preprint Sep 2026

SwiftExplorer: Training-free Diffusion Model Alignment with Swift Diversity Exploration

SwiftExplorer is proposed, a plugin that mitigates distribution collapse caused by excessive diversity loss and reduces compute costs, and adopts an Inheritance-Restart exploration mechanism to avoid early convergence, while exploration also increases the likelihood of high-reward trajectories.

Ren-Ye Yan, Ji-Kang Cheng, You Wu et al. · 0 citations
Preprint Aug 2026

Explore or Converge? Stage-Guided Per-Step Optimization for Diffusion Models

Stage-Guided Per-Step Optimization (SGPO) is proposed for diffusion models, which jointly leverages signal-to-noise ratio and semantic changes to identify generation stages and adaptively assign stage-specific objectives.

Ren-Ye Yan, Ji-Kang Cheng, You Wu et al. · 1 citation
Preprint Aug 2026

PAST: Prompt-Adaptive Sampling Termination for Efficient Diffusion Model

PAST is proposed, which provides differentiated rewards while adaptively regulating training episode length by jointly perceiving denoising progress and prompt difficulty and establishes a dual adaptive coordination mechanism that balances the extrinsic and intrinsic rewards.

Ren-Ye Yan, Ji-Kang Cheng, You Wu et al. · 0 citations

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