Abstract
Nitrogen oxides (NO x ) emissions into the atmosphere have multiple negative effects on the environment and effects directly and indirectly on human health. This paper describes the development of a model for NO x emission prediction at the national level based on artificial neural networks (ANNs) and on widely available sustainability, industrial, and economical parameters as input variables. In this study, 11 sustainability, industrial, and economical parameters were chosen as potential input variables. The ANN models were trained, validated, and tested with available data for 17 European countries, USA, China, Japan, Russia, and India for the years 2001 to 2008. The ANN modeling was performed using general regression neural network (GRNN), and correlation and variance inflation factor (VIF) analysis were applied to reduce the number of input variables. The best results were obtained using the selection of inputs based on the correlation between input variables, which provided a more accurate prediction than the GRNN model created with all initial selected input variables. Sensitivity analysis showed that the input variables with the largest influences on the GRNN model results were (in descending order) electricity production from oil sources, agricultural land, fossil fuel energy consumption, number of vehicles, gross domestic product, energy use, and electricity production from coal sources.
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The authors are grateful to the Ministry of Education, Science and Technological Development of the Republic of Serbia, Project No. 172007, for the financial support.
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Stamenković, L.J., Antanasijević, D.Z., Ristić, M.Đ. et al. Prediction of nitrogen oxides emissions at the national level based on optimized artificial neural network model. Air Qual Atmos Health 10, 15–23 (2017). https://doi.org/10.1007/s11869-016-0403-6
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DOI: https://doi.org/10.1007/s11869-016-0403-6