1. Researcher, Dept. of Mechanical Engineering, Andong National Univ., Seongcheon-Dong 1375, Gyeongdong-Ro, Andong-Si, Gyeongsangbuk-Do 760-749, Republic of Korea.
2. Professor, College of Mechanical Engineering and Automation, Zhejiang Sci-Tech Univ., Zhejiang Province 310018, China.
3. Professor, Dept. of Mechanical Engineering, Andong National Univ., Seongcheon-Dong 1375, Gyeongdong-Ro, Andong-Si, Gyeongsangbuk-Do 760-749, Republic of Korea (corresponding author).