Diffusion Model as a Noise-Aware Latent Reward Model for Step-Level Preference Optimization - Zhang, Tao; Da, Cheng; Ding, Kun; Yang, Huan; jin, kun; Li, Yan; Gao, Tingting; ZHANG, Di; XIANG, SHIMING; Pan, Chunhong (Advances in Neural Information Processing Systems, 2025)