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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 168371, 18 pages
Research Article

Steady Modeling for an Ammonia Synthesis Reactor Based on a Novel CDEAS-LS-SVM Model

1Key Laboratory of Advanced Control and Optimization for Chemical Process, Ministry of Education, Shanghai 200237, China
2Shanghai Electric Group Co. Ltd., Central Academe, Shanghai 200070, China

Received 6 December 2013; Accepted 5 February 2014; Published 18 March 2014

Academic Editor: Huaicheng Yan

Copyright © 2014 Zhuoqian Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A steady-state mathematical model is built in order to represent plant behavior under stationary operating conditions. A novel modeling using LS-SVR based on Cultural Differential Evolution with Ant Search is proposed. LS-SVM is adopted to establish the model of the net value of ammonia. The modeling method has fast convergence speed and good global adaptability for identification of the ammonia synthesis process. The LS-SVR model was established using the above-mentioned method. Simulation results verify the validity of the method.