1. School of Electrical & Electronic Engineering, Harbin University of Science and Technology, 52 Xuefu Road, Harbin, Heilongjiang 150080, P. R. China
2. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, 52 Xuefu Road, Harbin, Heilongjiang 150080, P. R. China
3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, 4, 2nd Section on Jianshe North Road, Chengdu, Sichuan 610054, P. R. China
4. Key Laboratory for Technology in Rural Water Management of Zhejiang Province, School of Electrical Engineering, Zhejiang University of Water Resources and Electric Power, 508 2nd Street, Zhejiang 310018, P. R. China
5. School of Mechanical and Power Engineering, Harbin University of Science and Technology, 52 Xuefu Road, Harbin, Heilongjiang 150080, P. R. China