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Predictive uncertainty in environmental modelling

delete2007-05-01
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PRE
AI
G
Gavin C. Cawley *
G
G. J. Janacek
M
M. R. Haylock
S
Stephen Dorling
DOI:10.1016/j.neunet.2007.04.024delete
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摘要

摘要

En 中文
Artificial neural networks have proved an attractive approach to non-linear regression problems arising in environmental modelling, such as statistical downscaling, short-term forecasting of atmospheric pollutant concentrations and rainfall run-off modelling. However, environmental datasets are frequently very noisy and characterized by a noise process that may be heteroscedastic (having input dependent variance) and/or non-Gaussian. The aim of this paper is to review existing methodologies for estimating predictive uncertainty in such situations and, more importantly, to illustrate how a model of the predictive distribution may be exploited in assessing the possible impacts of climate change and to improve current decision making processes. The results of the WCCI-2006 predictive uncertainty in environmental modelling challenge are also reviewed, suggesting a number of areas where further research may provide significant benefits. (C) 2007 Elsevier Ltd. All rights reserved.
Keyword:
predictive uncertainty
environmental modelling
multilayer perceptron
statistics
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