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- In relation to this article, we declare that there is no conflict of interest.
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Received June 29, 2014
Accepted October 5, 2014
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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A real-time model based on least squares support vector machines and output bias update for the prediction of NOx emission from coal-fired power plant
Department of Chemical Engineering, Hanyang University, Haengdang-dong, Sungdong-gu, Seoul 139-791, Korea
Korean Journal of Chemical Engineering, June 2015, 32(6), 1029-1036(8), 10.1007/s11814-014-0301-2
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Abstract
The accurate and reliable real-time estimation of NOx emission is indispensable for the implementation of successful control and optimization of NOx emission from a coal-fired power plant. We apply a real-time update scheme to least squares support vector machines (LSSVM) to build a real-time version for real-time prediction of NOx. Incorporation of LSSVM in the update scheme enhances its generalization ability for long-term predictions. The proposed real-time model based on LSSVM (LSSVM-scheme) is applied to NOx emission process data from a coal-fired power plant in Korea to compare the prediction performance of NOx emission with real-time model based on partial least squares (PLS-scheme). Prediction results show that LSSVM-scheme predicts robustly for a long passage of time with higher accuracy in comparison with PLS-scheme. We also present a user friendly and sophisticated graphical user interface to enhance the convenience to approach the features of real-time LSSVM-scheme.
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References
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