1. College of Environmental Science and Engineering Chang'an University
2. Xi'an, P.R. China
3. Northwest Plateau Institute of Biology
4. Chinese Academy of Sciences
5. Xining, P.R. China
6. International Research Centre for Renewable Energy & State Key Laboratory of Multiphase Flow in Power Engineering
7. Xi'an Jiaotong University
8. Xi'an, P. R. China