1. Tianjin Key Laboratory of Advanced Electrical Engineering and Energy TechnologySchool of Electrical Engineering and Automation, Tianjin Polytechnic University, Tianjin 300387, China
2. State Key Laboratory of Hollow Fiber Membrane Materials and ProcessesTianjin Polytechnic University, Tianjin 300387, China
3. Institute of Microelectronics, Hebei University of Technology, Tianjin 300131, China