1. School of Electrical and Electronic Engineering, Tianjin Key Laboratory of Film Electronic and Communication DevicesTianjin University of TechnologyTianjinPeople's Republic of China
2. School of Computer and Science EngineeringTianjin University of TechnologyTianjinPeople's Republic of China
3. Institute of Microelectronics of the Chinese Academy of SciencesBeijingPeople's Republic of China