1. College of Mechanics and Materials, HoHai University 1 , Nanjing 210098, China
2. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics 2 , Beijing 100088, China
3. LSEC, ICMSEC, Academy of Mathematics and Systems Science, CAS 3 , Beijing 100190, China
4. School of Mathematical Sciences, University of Chinese Academy of Sciences 4 , Beijing 100049, China