Funding for this research was provided by:
NSFC (11572120, 11972155)
Key Projects of the Research Foundation of Education Bureau of Hunan Province (17A224)
Article History
Received: 17 July 2019
Revised: 9 December 2019
Accepted: 17 January 2020
First Online: 19 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest to this work.
: The data of the analysis and optimization, which can be repeatable, are provided as supplementary material. Due to the secrecy of project, the experimental data would not be provided in this work.