1. College of Electrical and Computer Science, National Tsing Hua University, Hsinchu, Taiwan
2. Department of Computer Science, National Tsing Hua University, Hsinchu, Taiwan
3. Graduate Program in Energy and Opto-Electronic Materials, National Taipei University of Technology, Taipei, Taiwan
4. Department of Energy and Refrigerating Airconditioning Engineering, National Taipei University of Technology, Taipei, Taiwan