Shi, Lei
Han, Ya-jie
Ji, Zhi-xin
Li, Zi-han
Li, Huan-huan
Zhang, Jia-ying
Zhang, Zhi-wei http://orcid.org/0000-0002-1523-6185
Funding for this research was provided by:
Hebei Normal University of Science and Technology (2016YB003)
Hebei provincial science and Technology Department (17227302D)
2018 National College Students' innovation and entrepreneurship training project (201810798006)
Article History
Received: 20 February 2019
Accepted: 24 July 2019
First Online: 26 July 2019
Compliance with ethical standards
:
: There are no conflicts of interest to declare.