1. School of Electrical Engineering Shandong University Jinan Shandong P. R. China
2. State Grid Qingdao Power Supply Company Qingdao Shandong P. R. China
3. Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drugs, School of Pharmaceutical Sciences, Cheeloo College of Medicine Shandong University Jinan Shandong P. R. China
4. The Second Hospital of Shandong University Shandong University Jinan Shandong P. R. China