1. The Institute of Theory Strategy of Standardization, China National Institute of Standardization, Beijing 100191, China
2. Shandong Computer Science Center (National Supercomputer Center in Jinan), Qilu University of Technology (Shandong Academy of Sciences), Jinan 250316, China
3. Electric Power Research Institute of State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310007, China