Funding for this research was provided by:
National Natural Science Foundation of China (61702246)
Liaoning Province of China General Project of Scientific Research (L2015285)
Liaoning Province of China Doctoral Research Start-Up Fund (201601243)
Article History
Received: 23 July 2018
Revised: 31 July 2018
Accepted: 10 August 2018
First Online: 30 August 2018