Graphical Gaussian Process Models for Highly Multivariate Spatial Data.
Graphical Gaussian Process Models for Highly Multivariate Spatial Data.
复制标题
高度多元空间数据的图形高斯过程模型。
DOI:
10.1093/biomet/asab061
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发表时间:
2022
期刊:
影响因子:
2.7
通讯作者:
Banerjee,Sudipto
中科院分区:
文献类型:
--
作者:
Dey,Debangan;Datta,Abhirup;Banerjee,Sudipto
For multivariate spatial Gaussian process models, customary specifications of cross-covariance functions do not exploit relational inter-variable graphs to ensure process-level conditional independence between the variables. This is undesirable, especially in highly multivariate settings, where popular cross-covariance functions, such as multivariate Matérn functions, suffer from a curse of dimensionality as the numbers of parameters and floating-point operations scale up in quadratic and cubic order, respectively, with the number of variables. We propose a class of multivariate graphical Gaussian processes using a general construction called stitching that crafts cross-covariance functions from graphs and ensures process-level conditional independence between variables. For the Matérn family of functions, stitching yields a multivariate Gaussian process whose univariate components are Matérn Gaussian processes, and which conforms to process-level conditional independence as specified by the graphical model. For highly multivariate settings and decomposable graphical models, stitching offers massive computational gains and parameter dimension reduction. We demonstrate the utility of the graphical Matérn Gaussian process to jointly model highly multivariate spatial data using simulation examples and an application to air-pollution modelling.
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DOI:
10.1016/j.jmva.2011.05.010
发表时间:
2011-11
期刊:
J. Multivar. Anal.
影响因子:
--
作者:
Bo Li;Hao Zhang
通讯作者:
Bo Li;Hao Zhang
影响因子:
2.7
作者:
Apanasovich, Tatiyana V.;Genton, Marc G.
通讯作者:
Genton, Marc G.
影响因子:
1.4
作者:
W. Kleiber
通讯作者:
W. Kleiber
DOI:
10.1007/s13253-020-00414-2
发表时间:
2020-09
期刊:
Journal of Agricultural, Biological and Environmental Statistics
影响因子:
--
作者:
G. A. Qadir;C. Euán;Ying Sun
通讯作者:
G. A. Qadir;C. Euán;Ying Sun
DOI:
10.1007/s13253-018-00348-w
发表时间:
2019-09-01
影响因子:
1.4
作者:
Heaton, Matthew J.;Datta, Abhirup;Zammit-Mangion, Andrew
通讯作者:
Zammit-Mangion, Andrew