Funding for this research was provided by:
National Key Research and Development Program of China (No. 2017YFB1300900)
Science Foundation of National University of Defense Technology (No. ZK17-03-02, No. ZK16-03-14)
Chinese National Natural Science Foundation (No. 51605483)
Sichuan Science and Technology Program (2019JDRC0081)
Article History
Received: 11 December 2018
Revised: 19 March 2019
Accepted: 28 March 2019
First Online: 3 April 2019
Compliance with ethical standards
:
: The authors declare that there are no conflicts of interest regarding the publication of this paper.