1. Key Laboratory of Materials Modification By Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
2. School of Science, Shenyang Aerospace University, Shenyang 110136, China
3. Department of Mathematics and Physics, Hohai University, Changzhou 213022, China
4. School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, China