1. Department of Mechanical Engineering and Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan
2. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310027, China
3. Department of Engineering System and Science, National Tsing-Hua University, Hsin-Chu 30013, Taiwan
4. Department of Physics, Tamkang University, New-Taipei 25137, Taiwan