1Study of Method of Fault Diagnosis of Double Local-fans System in High-gas MineBAI Yun, HOU Yuan-binLaboratory Research1-52Study of Wireless Sensor Networks System for Gas Monitoring of Coal MineWANG Jian, WANG Ru-lin, WANG Xue-min, HE Chen-lingLaboratory Research5-83Study of Test System for Safety Performance of Hoister Based on USB InterfaceLaboratory Research9-114Study of Nonlinear Simulation and Modeling of SR MotorTANG Zhao-hui, ZHANG Xiao-xing, YU Shou-yiLaboratory Research12-145Development of New Intelligent Controller Based on the Communication of CAN BusCHEN Guo-jun, ZENG Qing-jun, HUANG Qiao-liangLaboratory Research15-186Development of Monitoring System of Electric Parameters in Enterprises Power Plant Providing for OneselfLaboratory Research19-227Research of Performance Optimization for Network Control SystemCHEN Hui-ying, XUE De-qianLaboratory Research23-268Study of a Half-bridge Converter of Single-stage PFCLIU Wen-yan, KAN Quan-fuLaboratory Research27-299Design of Mine Monitoring System Based on Embedded Web SensorsLEI Zhi-xiang, HUANG Xiao-yanTechnical Progress30-3310Design of Driver-component of Absolute Equipment of Mine Monitoring and Control System Based on MCGSTechnical Progress34-3711Hardware Design of Control System of Belt Conveyor Driven by Multi-motor Based on PLCWANG Fu-zhong, WANG Xiao-dan, WANG ShanTechnical Progress37-4012Study of Issuing Technology of Real-time Information of Coal Mine Integrated Automation SystemJIA Bei-beiTechnical Progress41-4413Monitoring and Control System of Belt Underground Based on PROFIBUS-DPTechnical Progress44-4614Development of Intelligent Ultrasonic Material Level Meter in Monitoring System of Material Level for Coal BunkerTechnical Progress47-4915Application of Signal Fusion Technology in Alarming System for Coal MineLI Ye-gang, LI Ye-deTechnical Progress50-5316Study of Communication Protocol of Monitoring and Control System for Mine Safety in ProductionLIU Jia-lei, LI Chang-qingTechnical Progress54-5717Study of Principle of Selective Leakage Protection of Zero Sequence DC of Low-voltage Power Network Underground and Its ImplementationTechnical Progress57-5918Precise Measurement of Ultrasonic Signal Based on MSP430 Singlechip MicrocomputerTechnical Progress60-6219Centralized and Decentralized Control of Mine Gas Sensor SystemTechnical Progress62-6420Design of Mine-used Carbon Monoxide SensorTechnical Progress65-68 