1. Mechanical Engineering Department; Hengyang Financial & Industrial Vocational-Technical College; Hengyang Hunan 421002 China
2. Department of Mechanical and Electrical Engineering; Fujian Polytechnic of Information Technology; Fuzhou Fujian 350003 China
3. Department of Mold and Die Engineering; National Kaohsiung University of Applied Sciences; 415 Chien Kung Road Sanmin District Kaohsiung 80778 Taiwan