Funding for this research was provided by:
the Science and Technology Project of Sichuan (No. 2017GZ0366)
the Innovation and Development Fund Project of the China Academy of Engineering Physics (No. K1173)
the Natural Science Foundation of China (No. 51475439)
Article History
Received: 14 August 2018
Accepted: 20 May 2019
First Online: 18 July 2019