Author

Qing-Jian Ni

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Preprint Aug 2026

Recovering Weighted Tangent Geometry from a Single-Scale Score Field

Near a smooth data manifold, one tangent space summarizes local geometry. At a branch point, the corresponding first-order object is instead a measure over tangent directions, whose normalized masses record the local share of each branch under the chosen data measure. We ask whether a score field at one noise level det...

Zi-Qi Zhao, Qing-Jian Ni · 1 citation

#machine learning Preprint Sep 2026

Learning Source Acquisition Policies by Offline Planning

O-MPAC transfers finite-horizon risk-cost targets from complete training records into a shared source-action scorer, and has the highest mean budget-integrated accuracy on five tasks against source-adapted GDFS, DIME, AACO+NN and a static policy.

Zi-Qi Zhao, Run Xu, Qing-Jian Ni · 0 citations

#machine learning Preprint Sep 2026

Matched Queries for Curvature and Density at Branching Junctions

This work addresses the inverse problem of matched score queries at noise scales $\sigma$ and $\lambda\sigma$ using matched subtraction to establish a perturbation bound and a conditional kernel-density-estimation rate.

Zi-Qi Zhao, Qing-Jian Ni · 0 citations