1. School of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China, and also with the Engineering Research Center for Metallurgical Automation and Measurement Technology of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China.
2. School of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China, and also with the Engineering Research Center for Metallurgical Automation and Measurement Technology of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China (e-mail: changxiaoheng@sina.com)
3. Department of Electrical Engineering, Yeungnam University, Gyeongsan 38541, South Korea (e-mail: jessie@ynu.ac.kr)