1. School of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin 150080 P. R. China
2. School of Measurement and Communication Engineering Harbin University of Science and Technology Harbin 150080 P. R. China
3. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education Harbin University of Science and Technology Harbin 150080 P. R. China
4. School of Science Harbin University of Science and Technology Harbin 150080 P. R. China
5. School of Material Science and Chemical Engineering Harbin University of Science and Technology Harbin 150080 P. R. China
6. Polymer Composites Engineering Laboratory Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China
7. State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China