A comparison of centring parameterisations of Gaussian process-based models for Bayesian computation using MCMC
A comparison of centring parameterisations of Gaussian process-based models for Bayesian computation using MCMC
复制标题
使用 MCMC 进行贝叶斯计算的基于高斯过程的模型的中心参数化比较
DOI:
10.1007/s11222-016-9700-z
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发表时间:
2016
影响因子:
2.2
通讯作者:
Bass M
中科院分区:
文献类型:
--
作者:
Bass M
Markov chain Monte Carlo (MCMC) algorithms for Bayesian computation for Gaussian process-based models under default parameterisations are slow to converge due to the presence of spatial- and other-induced dependence structures. The main focus of this paper is to study the effect of the assumed spatial correlation structure on the convergence properties of the Gibbs sampler under the default non-centred parameterisation and a rival centred parameterisation (CP), for the mean structure of a general multi-process Gaussian spatial model. Our investigation finds answers to many pertinent, but as yet unanswered, questions on the choice between the two. Assuming the covariance parameters to be known, we compare the exact rates of convergence of the two by varying the strength of the spatial correlation, the level of covariance tapering, the scale of the spatially varying covariates, the number of data points, the number and the structure of block updating of the spatial effects and the amount of smoothness assumed in a Matérn covariance function. We also study the effects of introducing differing levels of geometric anisotropy in the spatial model. The case of unknown variance parameters is investigated using well-known MCMC convergence diagnostics. A simulation study and a real-data example on modelling air pollution levels in London are used for illustrations. A generic pattern emerges that the CP is preferable in the presence of more spatial correlation or more information obtained through, for example, additional data points or by increased covariate variability.
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DOI:
10.1198/016214507000000031
发表时间:
2007-12-01
影响因子:
3.7
作者:
Sahu, Sujit K.;Gelfand, Alan E.;Holland, David M.
通讯作者:
Holland, David M.
影响因子:
3.8
作者:
P. Apputhurai;A. Stephenson
通讯作者:
A. Stephenson
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
O. Papaspiliopoulos;G. Roberts
通讯作者:
G. Roberts
DOI:
10.1198/016214508000000959
发表时间:
2008-12-01
影响因子:
3.7
作者:
Kaufman, Cari G.;Schervish, Mark J.;Nychka, Douglas W.
通讯作者:
Nychka, Douglas W.
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
G. Roberts;O. Papaspiliopoulos;M. Sköld
通讯作者:
M. Sköld