Ding, Yonggang
Li, Shijun
Yu, Wei
Funding for this research was provided by:
the National Natural Science Foundation of China (61502350)
the Joint Funds of National Natural Science foundation of China (U1536114)
Article History
Received: 8 February 2018
Revised: 21 February 2018
Accepted: 23 February 2018
First Online: 17 March 2018