Xu, Jinhui
Wang, Biao
Wang, Li
Wang, Ping
Funding for this research was provided by:
the National Science Fund for Distinguished Young Scholars (51425804)
the National Science Foundation (U1234201)
Article History
Received: 29 May 2015
Revised: 24 May 2016
Accepted: 26 May 2016
First Online: 18 June 2016