Liu, Zhengmin
Xu, Hongxue
Liu, Peide
Li, Lin
Zhao, Xiaolan
Funding for this research was provided by:
Humanities and Social Sciences Research Project of Ministry of Education of China (17YJA630065)
Natural Science Foundation of Shandong Province (ZR2017MG007)
Project of Shandong Province Higher Educational Science and Technology Program (J16LN25)
National Science Foundation of China (71771140)
Special Funds of Taishan Scholars Project of Shandong Province (ts201511045)
Article History
Received: 20 July 2019
Revised: 23 August 2019
Accepted: 29 August 2019
First Online: 26 September 2019