1. Graduate School of Science and Technology, Gunma University,Kiryu,Japan,376–8515
2. Naresuan University,Department of Mechanical Engineering,Phitsanulok,Thailand,65000
3. Posts and Telecommunications Institute of Technology,Faculty of Electrical and Electronic,Hanoi,Vietnam
4. Gunma University,Division of Mechanical Science and Technology,Kiryu,Japan,376–8515