Funding for this research was provided by:
the Fundamental Research Funds for Beijing Universities (110052971803/037)
Yuyou Talent Support Plan of North China University of Technology (107051360019XN132/017)
Special Research Foundation of North China University of Technology (PXM2017_014212_000014)
Article History
Received: 13 September 2018
Revised: 14 July 2019
Accepted: 13 August 2019
First Online: 3 September 2019