提出学习后物理支撑推断新方法,解决字典学习带来的误判问题。
Honest Physical-Support Inference after Latent Dictionary Learning: Collision Singularities and Minimax Resolution
- 基于训练数据兼容性构建支持空间,实现鲁棒推断
- 在固定壳层下达到最优收敛率 $s \wedge (\sqrt{N}s^2)^{-1}$
- 适用于需要高精度支撑判断的信号分析场景
稀疏支撑不确定性通常假设字典已知,但当字典从潜在稀疏混合中学习时,此假设可能导致过度自信且依赖标签的结论。当相干原子接近碰撞时,测试信号可识别活跃物理组,尽管训练数据无法区分其内部物理射线。本文发展了在隐式字典学习后的活跃物理射线(单位原子模符号)推断方法。在固定维高斯训练-测试实验中,保留所有与稳健训练矩区域相容的字典,对测试表示在其上进行投影,并将存活配置投射到置换不变支持空间。结果得到的置信对应关系可报告跨片不明确、组内子项模糊或精细支撑分辨。我们刻画其统计代价与决策论收益。残差块方向首先以立方阶影响潜在训练密度,产生 $s^6$ 阶信息量,其中 $s$ 为块内碰撞尺度。该对应关系提供高概率训练条件下测试覆盖,分辨率由父检测性、测试时支撑分离度及学习字典方向独立决定。在解析的固定壳层情形下,其投影豪斯多夫直径以最小最大最优率 $s \wedge (\sqrt{N}s^2)^{-1}$ 收敛,常数范围内。受限任务定理进一步确定系数不对称何时允许测试复制补充训练信息,何时校准不确定性不可约。框架由此生成诚实、自适应分辨率的支撑陈述,并指导训练与测试测量分配。
原文摘要 · Abstract (English)
Sparse-support uncertainty is usually quantified by treating the dictionary as known, an assumption that can produce overconfident, label-dependent conclusions when the dictionary is learned from latent sparse mixtures. Near collisions of coherent atoms, a test signal may identify the active physical group even though the training data cannot distinguish the physical rays within it. We develop inference for active physical rays, unit atoms modulo sign, after latent dictionary learning. In a fixed-dimensional Gaussian train-test experiment, we retain all dictionaries compatible with a robust training-moment region, profile the test representation over them, and project surviving configurations onto a permutation-invariant support space. The resulting confidence correspondence can report cross-sheet inconclusiveness, group resolution with child ambiguity, or fine-support resolution. We characterize both its statistical cost and decision-theoretic benefit. Residual block orientation first affects the latent training density at cubic order, yielding information of order $s^6$, where $s$ is the within-block collision scale. The correspondence provides high-probability-over-training conditional test coverage, with resolution governed separately by parent detectability, test-time support separation, and learned-dictionary orientation. In the resolved fixed-shell regime, its projective Hausdorff diameter contracts at the minimax-optimal rate $s \wedge (\sqrt{N}s^2)^{-1}$, up to constants. A restricted-task theorem further determines when coefficient asymmetry allows test replication to supplement training information and when calibration uncertainty remains irreducible. The framework thus yields honest, resolution-adaptive support statements and guides the allocation of training versus test measurements.
Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品;中文卡片由大模型生成,请以原文为准。