1. Qinghai Dehong Electric Power Technology,Xining,Qinghai,China
2. State Grid Qinghai Electric Power Company,Xining,Qinghai,China
3. School of Mathematical and Physical Science, North China Electric Power University,Changping, Beijing,China
4. Datang Xiangcheng (Derong) Hydropower Development,Xiangcheng,Sichuan,China