Zhang, Yiming
Feng, Xue
Wang, Lihui
Su, Yanping
Chu, Zhuodong
Sun, Yanxiang
Funding for this research was provided by:
The Key Natural Science Research projects in Colleges and Universities of Hebei Province (ZD2017065)
Science and Technology Support Project of Langfang 2019. (2019012013)
School-level Education and Teaching Reform Project, Langfang Normal University 2018 (10201004115014)
Natural Science Foundation of Hebei Province (C2015408022)
Article History
Received: 14 October 2019
Accepted: 21 February 2020
First Online: 2 March 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.