1. Institute of Mechanics, Vietnam Academy of Science and Technology, 264 Doi Can, Hanoi 10000, Vietnam;
2. Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi 10000, Vietnam e-mails: ;
3. Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi 10000, Vietnam