1. Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
2. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
3. Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK
4. Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan