1. a Department of Greenergy Technology, National University of Tainan, 33, Sec. 2, Shu-Lin St., Tainan 70005, Taiwan;, Email: tangitseng@yahoo.com.tw
2. b Department of Communications Navigation and Control Engineering, National Taiwan Ocean University, No. 2, Beining Rd., Jhongjheng District, Keelung City 202, Taiwan
3. c Department of Greenergy Technology, National University of Tainan, 33, Sec. 2, Shu-Lin St., Tainan 70005, Taiwan