Cai, Xiangji http://orcid.org/0000-0001-6655-5736
Funding for this research was provided by:
National Natural Science Foundation of China (11947033)
Doctoral Research Fund of Shandong Jianzhu University under Grant No. XNBS1852.
Article History
Received: 23 July 2019
Accepted: 17 December 2019
First Online: 9 January 2020
Competing interests
: The authors declare no competing interests.