1Research of Key Technologies about Electrical Safety of Coal MineSUN Ji-ping1-42Research of Mine-used Service System of Dispatching and Communication Based on Soft Switch Platform and Its ImplementationGU Jun, HUO Zhen-long, XU Xi-liang, WANG Wei5-83Research of Multi-layer DEM Modeling and Its Application in Stratum VisualizationWEI Yong-yong9-134Design of Vibration Detecting System for Rolling Bearing of Shearer Based on DSPCHEN Qiao-ying, LIN Hang, XIANG Ji-feng13-155Hardware Design of Intelligent Integrated Protector for Mine Low-voltage Vacuum Feeding SwitchHUAI Li16-186Design of a Battery-powered Early Warning Circuit for Shearer StartingAN Mei-zhen, QIAN Jiang-yong, CHEN Hu, QIU Jin-bo19-227Research of Method of On-line Fault Line Selection and Location of Underground CableSUN Quan-cai, JIN Lin23-278Research of Influence of OLTC on Static Voltage Stability LimitDUAN Jun-dong, ZHU Shan-shan28-319Design of Monitoring Node of Coal Mine Gas, Temperature and Humidity Based on ZigBee ProtocolLEI Lin, DONG Hua-li32-3410Research of Complete Core-drilling Technology of Coal Seam and Influence Factors on ItZHANG Jian-jun, JIANG Cheng-lin, WU Ai-jun35-3811Research of a Novel Active Power Smoothing Control Strategy for Double-fed Wind Turbine GeneratorWANG Xiao-lan, ZHANG Shu-xin38-4312Research of Audio Codec System Based on SPI Protocol and Its DesignXU Bo, GUO Qiu-min44-4913Research of Stability of East Slope of Bayan Obo Iron MineZHANG Fei, LI Mo-ran, ZHOU Lian-chun, SUN Bao-lei, CAO Hua50-5214Measurement, Calculation and Analysis of Ground Electric Field of Super High-voltage Transmission LineFU Chao-guo, SUN Yan-zhou52-5415Discussion of Problems Needed Attach Importance to in Automation Construction of Coal Mine EnterpriseZHAO Zeng-yu55-5616Research of Preventing Longitudinal Tearing of Belt Conveyor of Coal MineCAO Jian, ZHANG Shu-yang, ZHANG Shu-li, GENG Bo57-5817Analysis of Necessity and Feasibility of CAN Bus Used in Safety Protection System of Mine-used Diesel VehicleZHOU Xu, YAN Wei-guang, SUN Yong, ZHANG Li-bin, CHEN Ya59-6118Reliability Design of Electrical Control System of Coal Mine TunnellerWANG De-guang61-6319Research of Real-time Performance of Profibus-DP Single Master-station SystemCHEN Mei, YAO Qi-yun, LI Xin, CHEN Wei, LIU Zhen-ying64-6720Application Status of Data Mining Technology in Power Marketing SystemHAO Xiao-hong, ZHU Jie, WANG Wei-zhou, HU Zhen-bang68-72 