Predicting trace gas concentrations using quantile regression models

被引:0
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作者
Mercedes Conde-Amboage
Wenceslao González-Manteiga
César Sánchez-Sellero
机构
[1] University of Santiago de Compostela,Department of Statistics and O.R.
关键词
Quantile regression; NO; concentration; Prediction errors; Prediction intervals; Bootstrapping; Median regression;
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学科分类号
摘要
Quantile regression methods are evaluated for computing predictions and prediction intervals of NOx concentrations measured in the vicinity of the power plant in As Pontes (Spain). For these data, smaller prediction errors were obtained using methods based on median regression compared with mean regression. A new method to construct prediction intervals involving median regression and bootstrapping the prediction error is proposed. This new method provides better coverage for NOx data compared with classical and bootstrap prediction intervals based on mean regression, as well as simpler prediction intervals based on quantile regression. A simulation study illustrates the features of this proposed method that lead to a better performance for obtaining prediction intervals for these particular NOx concentration data, as well as for any other environmental dataset that do not meet assumptions of homoscedasticity and normality of the error distribution.
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页码:1359 / 1370
页数:11
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