1. Ph.D. Student, School of Automation, Southeast Univ., Nanjing, Jiangsu 210096, P.R. China; and Lecturer, School of Mathematics and Physics, Henan Univ. of Urban Construction, Pingdingshan, Henan 467036, P.R. China.
2. Associate Professor, Key Laboratory of Measurement and Control of CSE, Ministry of Education; School of Automation, Southeast Univ., Nanjing, Jiangsu 210096, P.R. China.
3. Professor, Key Laboratory of Measurement and Control of CSE, Ministry of Education; School of Automation, Southeast Univ., Nanjing, Jiangsu 210096, P.R. China (corresponding author).
4. Ph.D. Student, School of Automation, Southeast Univ., Nanjing, Jiangsu 210096, P.R. China.