1. Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing and School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing, China
2. State Grid Wuxi Power Supply Company, Wuxi, China
3. Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau, China
4. Guangdong Shenglu Telecommunication Tech. Company Ltd, Foshan, China