Research of routing protocol of wireless sensor network for coal mine goaf
XIA Xu;LI Wanghuai;LI Deng;CHEN Zhigang;Department of Electrical and Information Engineering;Hunan Vocational Institute of Safety Technology;School of Software;Central South University;School of Information Science and Engineering;Central South University;
Research of method of maintaining high power factor for PWM rectifier
ZHENG Lijun;SHEN Yarui;SONG Jiancheng;College of Electrical and Power Engineering;Taiyuan University of Technology;Shanxi Key Laboratory of Coal Mining Equipment and Safety Control;Shandong Dongying Power Supply Company;