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Author

Kai Zhang

3 papers indexed here

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Jul 2026

Hopformer: Homogeneity-Pursuit Transformer for Time Series Forecasting

Hopformer (Homogeneity-Pursuit Transformer), a two-stage framework that addresses multiple time-series with high-dimensional covariates, and proves that SPA achieves a near-optimal bias-variance trade-off via an oracle inequality.

Wan Zhang, Qinjie Lin, Chan Lee et al. · 0 citations
Preprint Aug 2026

The Loss Floor of Denoising Score Matching: Fisher Geometry from Schr\"odinger Bridges

Denoising score matching trains diffusion models by regressing onto a conditional score, although generation ultimately requires the marginal score, and derives the result from a Schr"odinger bridge variational principle, in which the ideal objective arises as excess path-space relative entropy.

Avinash Raju, Kai Zhang · 0 citations
Preprint Aug 2026

Stream Forcing: Constructing Unified Training Trajectory for Robust Streaming Video Generation

This work reformulates the video diffusion sampling as a frame-indexed stochastic process over noise levels, and constructs a continuous training trajectory along which the sampling schedule progressively evolves from independent sampling to inference-consistent sampling.

Yue-Ting Zhu, Yue-Hao Song, Kai-Chen Zhang et al. · 2 citations

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