Yang, Jiangwei
Zhang, Ning
Zhou, Xiangyan
Si, Huaijun
Wang, Di
Funding for this research was provided by:
the National Natural Science Foundation of China (31460370)
the Specialized Research Fund for the Doctoral Program of Higher Education of China (20106202120003)
International Science & Technology Cooperation Program of China (0102014DFG31570)
the Fundamental Research Funds for the Universities of Gansu Province (2014)