Zhu, Hongqiang
Qiu, Jianxian
Qiu, Jing-Mei
Funding for this research was provided by:
USAF (U1630247)
Division of Mathematical Sciences (DMS-1522777)
Air Force Office of Scientific Research (FA9550-16-1-0179)
National Natural Science Foundation of China (11201242, 11571290)
Article History
Received: 22 December 2016
Revised: 7 April 2017
Accepted: 19 April 2017
First Online: 6 May 2017