1. Mechatronics School, Harbin University of Commerce, Harbin, P.R. China
2. Mechatronics School, Zhejiang Sci-Tech University, Hangzhou, P.R. China
3. Motorcar Engineering School, Heilongjiang Institute of Technology, Harbin, P.R. China
4. Mechatronics School, Harbin University of Science and Technology, Harbin, P.R. China
5. Physics Teaching Group, No. 1 Middle School of Jiamusi City, Jiamusi, P.R. China