Xiaoliu Guan Lielin Jiang Hanqi Chen Xu Zhang Jiaxing Yan Guanzhong Wang Yi Liu Zetao Zhang Yu Wu Forecasting When to Forecast: Accelerating Diffusion Models with Confidence-Gated Taylor. 2025 August abs/2508.02240 CoRR https://doi.org/10.48550/arXiv.2508.02240 db/journals/corr/corr2508.html#abs-2508-02240 streams/journals/corr