Funding for this research was provided by:
National Natural Science Foundation of China (11701553)
national postdoctoral program for innovative talents (BX201600188)
China Postdoctoral Science Foundation funded project (2017M611035)
Young elite scientists sponsorship program by CAST (2016QNRC001)
Foundation of Science and Technology on Information Assurance Laboratory (61421120102162112007)
National Natural Science Foundation of China (61872383)
Article History
Received: 25 July 2018
Revised: 22 January 2019
Accepted: 24 January 2019
First Online: 9 February 2019