1. College of Automation, Nanjing University of Posts and TelecommunicationsNanjing210023People's Republic of China
2. Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, Southeast UniversityNanjing210096People's Republic of China
3. Department of Mechanical EngineeringUniversity of VictoriaPO Box 3055, STN CSCVictoriaBCV8W 3P6Canada