Sun, Hongchun
Tian, Maoying
Sun, Min
Funding for this research was provided by:
National Natural Science Foundation of China (11601475, 11671228)
the foundation of First Class Discipline of Zhejiang-A (Zhejiang University of Finance and Economics- Statistics))
the foundation of National Natural Science Foundation of Shandong Province (ZR2016AL05)
Scientific Research Project of Shandong Universities (J15LI11)