1. Department of Computer Science and Information Engineering, National Chi Nan University, Nantou, Taiwan
2. Department of Computer Science and Information Engineering, National Ilan University, Yilan, Taiwan
3. Department of Physics and Center for Theoretical Physics, National Taiwan University, Taipei, Taiwan
4. Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
5. Department of Electronics Engineering, Chang Gung University, Taoyuan, Taiwan