About the Authors

Y. T. Shao

Zhejiang University of Finance & Economics, Xueyuan street, Hangzhou, China

H. J. Cai

Zhejiang University of Finance & Economics, Xueyuan street, Hangzhou, China

G. Chen

Zhejiang University of Finance & Economics, Xueyuan street, Hangzhou, China

Corresponding Author

Email: modellover@sina.cn