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arXiv 2402.02773math.STstat.MEstat.TH
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空间数据在 $\mathbb{R}^d$ 上的级数岭回归

Series ridge regression for spatial data on $\mathbb{R}^d$

Daisuke Kurisu, Yasumasa Matsuda

AI总结:

本文为不规则空间数据上的级数岭回归建立了渐近理论,涵盖趋势与非参数回归模型,证明了收敛速度与中心极限定理,并展示了样条和小波估计的最优性及置信区间构建方法。

摘要:

本文针对在采样区域 $R_n \subset \mathbb{R}^d$ 内不规则位置收集的空间数据,发展了级数估计量的一般渐近理论。我们采用一种随机采样设计,能够灵活地生成不规则间隔的采样点,涵盖纯递增和混合递增域框架。具体而言,我们关注空间趋势回归模型和具有空间依赖协变量的非参数回归模型。对于这些模型,我们研究了趋势和回归函数的 $L^2$ 惩罚级数估计。作为主要结果,我们建立了通用级数估计量的均匀和 $L^2$ 收敛速度以及多元中心极限定理。此外,我们证明了样条和小波级数估计量达到最优的均匀和 $L^2$ 收敛速度,并提出了为这些估计量构建置信区间的方法。最后,我们证明了我们对底层空间过程的依赖结构条件覆盖了广泛的随机场类别,包括 Lévy 驱动的连续自回归和移动平均随机场。

英文摘要:

This paper develops a general asymptotic theory of series estimators for spatial data collected at irregularly spaced locations within a sampling region $R_n \subset \mathbb{R}^d$. We employ a stochastic sampling design that can flexibly generate irregularly spaced sampling sites, encompassing both pure increasing and mixed increasing domain frameworks. Specifically, we focus on a spatial trend regression model and a nonparametric regression model with spatially dependent covariates. For these models, we investigate $L^2$-penalized series estimation of the trend and regression functions. We establish uniform and $L^2$ convergence rates and multivariate central limit theorems for general series estimators as main results. Additionally, we show that spline and wavelet series estimators achieve optimal uniform and $L^2$ convergence rates and propose methods for constructing confidence intervals for these estimators. Finally, we demonstrate that our dependence structure conditions on the underlying spatial processes cover a broad class of random fields, including Lévy-driven continuous autoregressive and moving average random fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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