Cui, Wengang
Zheng, Huaan
Niu, Menglong
Zhang, Shengjun
Li, Dong
Qiao, Jing
Li, Wenhong
Funding for this research was provided by:
Overall Science and Technology Innovation Project of Shaanxi province (2014KTCL01-09)
Research Fund for the Doctoral Program of Higher Education of China (20126101120013)
Scientific Research Project of the Department of Education of Shaanxi province (14JF026, 15JF031)