Detection of Local Differences in Spatial Characteristics Between Two Spatiotemporal Random Fields
Detection of Local Differences in Spatial Characteristics Between Two Spatiotemporal Random Fields
复制标题
两个时空随机场之间空间特征的局部差异检测
DOI:
10.1080/01621459.2020.1775613
复制
发表时间:
2021
影响因子:
3.7
通讯作者:
Li, Bo
中科院分区:
文献类型:
--
作者:
Yun, Sooin;Zhang, Xianyang;Li, Bo
Comparing the spatial characteristics of spatiotemporal random fields is often at demand. However, the comparison can be challenging due to the high-dimensional feature and dependency in the data. We develop a new multiple testing approach to detect local differences in the spatial characteristics of two spatiotemporal random fields by taking the spatial information into account. Our method adopts a two-component mixture model for location wisep-values and then derives a new false discovery rate (FDR) control, called mirror procedure, to determine the optimal rejection region. This procedure is robust to model misspecification and allows for weak dependency among hypotheses. To integrate the spatial heterogeneity, we model the mixture probability as well as study the benefit if any of allowing the alternative distribution to be spatially varying. An EM-algorithm is developed to estimate the mixture model and implement the FDR procedure. We study the FDR control and the power of our new approach both theoretically and numerically, and apply the approach to compare the mean and teleconnection pattern between two synthetic climate fields. Supplementary materials for this article are available online.
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影响因子:
6.3
作者:
Jenish N;Prucha IR
通讯作者:
Prucha IR
影响因子:
1.7
作者:
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通讯作者:
J. Smerdon
影响因子:
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作者:
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通讯作者:
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DOI:
10.1080/01621459.2017.1336443
发表时间:
2018-01-01
影响因子:
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作者:
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通讯作者:
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