Author

Song Liu

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Preprint Aug 2026

Guidance for Prior Change via Density Ratio Estimation

Simulation-Based Inference (SBI) serves as a vital framework for parameter inference in scientific fields where simulators involve intractable likelihoods, yet while amortized generative models offer rapid posterior estimation, they are often restricted by the specific priors used during training, thereby limiting thei...

Yichen Zang, Song Liu, Jiun-Yi Lin · 1 citation

#machine learning Jul 2026

Zero-Flow Two-Sample Tests

The Zero-Flow Two-Sample Test (ZF2ST), built on the zero-flow criterion, is proposed, which characterizes distributional equality through a time-reversal antisymmetry of a learnable velocity field and develops the Zero-Flow Discrepancy, an identifying discrepancy that controls the Wasserstein distance.

Ya-Kun Wang, Le-Yang Wang, Song Liu et al. · arXiv.org · 1 citation