Affiliation: | 1. Institute of Engineering Technology, National Yunlin University of Science and Technology , 123 University Road, Sec. 3, Touliu, 640, Taiwan, R.O.C hwangsf@yuntech.edu.tw;3. Department of Mechanical Engineering , Wu Feng Institute of Technology , 117 Chian-Kuo Road, Sec. 2, Ming-Hsiung, Chia-Yi, 621, Taiwan, R.O.C |