Li, Qiang
Wang, Liming
Funding for this research was provided by:
the National Natural Science Foundation of China (71540038, 71271128)
the Natural Science Foundation of Shandong Province in China (ZR2014AL006)
the Talent Research Fund of Taishan University (Y-01-2016002)
Article History
Received: 14 November 2015
Revised: 7 April 2017
First Online: 30 June 2017