1. Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan
2. Master Program, Graduate Institute of Mechatronic Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
3. Institute for the Development and Quality, Macau, Macao 999078, China
4. Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Macao 999078, China