Monotone Nonparametric Regression for Functional/Longitudinal Data

Monotone Nonparametric Regression for Functional/Longitudinal Data
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函数/纵向数据的单调非参数回归

DOI:
10.5705/ss.202018.0233
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发表时间:
2020
期刊:
影响因子:
1.4
通讯作者:
Hongtu Zhu
Hongtu Zhu
中科院分区:
数学3区
文献类型:
--
作者:
Ziqi Chen;Qibing Gao;Bo Fu;Hongtu Zhu

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为了量化老年人群中灰质体积与年龄之间的单调关系,本研究提出了一种功能/纵向数据单调均值函数的约束非参数估计和统计推断。在一些较温和的条件下,我们系统地研究了所提出的估计量的渐近性质,使用了一个一般的加权方案,该方案包括每个观察点的等权(OBS)和每个受试者的等权(SUBJ)作为特例。大多数现有的没有结构约束的方法只能处理稀疏或密集的数据。因此,在这两种类型之间的主观选择可能会导致统计推断得出错误的结论。我们的建议1统计学报:预印DOI:10.5705/ss.202018.0233
Motivated by quantifying the monotonic relationship between gray matter (GM) volume and age in the older population, this study proposes a constrained nonparametric estimation and statistical inference for the monotone mean function of functional/longitudinal data. Under some mild conditions, we systematically investigate the asymptotic properties of the proposed estimators, using a general weighting scheme that includes an equal weight per observation (OBS) and an equal weight per subject (SUBJ) as special cases. Most existing methods without a structural constraint can handle sparse or dense data only. Thus, a subjective choice between the two types may lead to erroneous conclusions from statistical inferences. Our proposed 1 Statistica Sinica: Preprint doi:10.5705/ss.202018.0233
DOI: 10.1038/nn1008
发表时间: 2003-03-01
影响因子: 25
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