1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, P. R. China
2. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, P. R. China
3. School of General Education, Wuchang University of Technology, Wuhan, P. R. China
4. Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), Shandong University, Jinan, P. R. China