Yanhui Xi received the Ph.D. degree in control science and engineering from Central South University, China, in 2013. She is an Associate Professor at Changsha Uni- versity of Science and Technology. Her research interests include system modeling and identification, nonlinear optimization, and traveling identification. Corresponding author of this paper. E-mail: xivanhui@126.com Hui Peng received the Ph.D. degree at the School of Mathematical and Physical Science, the Graduate University for Advanced Studies, Japan, in 2003. He is a Professor at the School of Information Science and Engineering, Central South University. His research interests include predictive control, adaptive control, system modeling and identification, modeling and dynamic asset allocation in financial markets. E-mail: huipeng@mail.csu.edu.cn Hong Mo received the Ph.D. degree from Graduate University of Chinese Academy of Sciences in 2004. She is a Professor at the School of Electrical and Information Engineering, Changsha University of Sciences and Technology. Her research interests include linguistic dynamic systems, time-varying universe, and type-2 fuzzy sets. E-mail: mohong198@163.com