Funding for this research was provided by:
National Natural Science Foundation of China (11171269, 11571274)
China Scholarship Council (201606280154)
Division of Mathematical Sciences (1522267)
Division of Chemical, Bioengineering, Environmental, and Transport Systems (160910)
Article History
Received: 19 July 2017
Revised: 16 January 2018
Accepted: 8 February 2018
First Online: 1 March 2018