1. School of Mechanical and Materials Engineering, North China University of Technology, Beijing, China
2. College of Science, Tibet University, Lhasa, China
3. School of Instrument Science and Engineering, Harbin Institute of Technology, Harbin, China
4. Chongqing General Aviation Industry Group Company Ltd., Chongqing, China
5. Key Laboratory of Cosmic Rays, (Tibet University), Ministry of Education Lhasa, Lhasa, China