1. Ph. D: Sep., 1995 - Dec., 1998, School of Mechanical Engineering, Xi’an Jiaotong University, P.R. China
2. M. Eng.: Sep., 1990 - May, 1993, School of Mechanical Engineering, Xi’an Jiaotong University, P.R. China
3. B. Eng.: Sep., 1984 - July, 1988, Department of Mechanical Engineering, Xi’an Jiaotong University, P.R. China