1Study of Application of Bluetooth Technology in Data Transmission of Coal MineSONG Bai, ZHU Hua, XUE Yong-gangLaboratory Research1-52Design of Control System of Mine Drainage PumpsBU Xiang-quan, ZHOU Shu-zhi, PANG Ke-wangLaboratory Research5-73Study of a Forecasting Method of Geological Disaster in Coal Mine Based on Wavelet AnalysisZHANG Yang, YAN Jie, LI DongLaboratory Research8-104Design of Intelligent Charging System of Electrical Locomotive in Coal MineHU Xue-feng, TAN Guo-junLaboratory Research11-145Study of a New Model of Signal TransmissionCHEN Jin-ying, SHANG Qin, LI Yang, CHEN ZhuoLaboratory Research14-166Study of Lightweight Workflow Engine Based on .Net and DatabaseCHEN Xiao-lin, HE Yao-yi, TANG Li-pingLaboratory Research17-207Study of OPNET Network Simulation and Its ApplicationGAO Yuan, HUA GangLaboratory Research21-238Analysis of Safety and Reliability of WatchDogLaboratory Research24-269Study of Modeling of SVI Soft Measurement for AeratorLaboratory Research27-2910Overview about Study Status and Control Strategy of Sensorless Control Technology of Permanent Magnet Synchronous MotorPAN Ping, FU Zi-yi, LIU Hui, ZENG MiOverview29-3111Fault Diagnosis Technology of Frequency Converter and Its Development TrendMA Tian-bing, DU Fei, ZHANG An-ningOverview32-3412Study of Forecast System of Outburst of Coal Laneway with Method of Continuous Flow and Its ImplementationLI Kui, CHEN Song-li, CHEN ZhuanTechnical Progress35-3713Application of Hybrid Networking Model in On-line Monitoring System for Coal Mine VentilatorZHANG Hong-qin, REN Zi-huiTechnical Progress38-4014A New Kind of Device of High-voltage Comprehensive Monitoring and Protection for Coal Mine UndergroundTechnical Progress40-4215Design of Automatic Control and Protection System of Emulsion Pump-station of Coal Mine Based on Single-chip MicrocomputerLI Cheng, ZHANG Guang-ming, TANG Gui-zhong, ZHU WeiTechnical Progress43-4516Application of Model ZDB6 Integrated Device with Auto-tracking Compensation in 6 kV Power NetworkTechnical Progress46-4817Application of Model GJWJ-IV Single-phase-to-ground Line Selection Device for High-voltage Power Network in Liangzhuang Coal MineTechnical Progress48-5018Development of Intelligent Protector of Mine Motor Based on AVR Single-chip MicrocomputerYU Dao-yang, ZHANG Chuan-wei, GUO WeiTechnical Progress51-5319Study of Transmission Technology of Digital Video Information Based on IP NetworkJIANG En-huaTechnical Progress54-5720Study of Networking System of Remote Monitoring of Coal Mine Based on the Latest MapGuide TechnologyGUO JunTechnical Progress57-60 