Bayesian inference for wind field retrieval

NEUROCOMPUTING

卷:30

Article

Nabney, IT ; Cornford, D ; Williams, CKI

关键词: Bayesian inference;    surface winds;    spatial priors;    Gaussian processes;   

DOI  :  10.1016/S0925-2312(99)00136-8

来源: Elsevier

【 摘 要 】

In many problems in spatial statistics it; is necessary to infer a global problem solution by combining local models, A principled approach to this problem is to develop a global probabilistic model for the relationships between local variables and to use this as the prior in a Bayesian inference procedure. We use a Gaussian process with hyper-parameters estimated from numerical weather prediction models, which yields meteorologically convincing wind fields. We use neural networks to make local estimates of wind vector probabilities. The resulting inference problem cannot be solved analytically, but Markov Chain Monte Carlo methods allow us to retrieve accurate wind fields. (C) 2000 Elsevier Science B.V. All rights reserved.

【 授权许可】

Free