1Discussion of Thought of Calculation and Risk Assessment of Single Danger Source of Coal Mine AccidentWANG Pei, LI Xin-chunLaboratory Research1-52Visual Interpretation Technology of Multi-target Remote Monitoring for Mineral Development in Gather Phosphorus Area of Western of Hubei ProvincePENG Ying, ZHANG Zhi, PENG Dan, WANG Jie, Yang Qing-huaLaboratory Research6-93Predicting Model of Gas Content Based on Improved BP Neural NetworkZHAO Yan-mingLaboratory Research10-134Research of Risk Assessment System for Environment Information in Coal Mine Underground Based on MSFXU Lei, ZHENG Hua, SONG QiangLaboratory Research14-165Design of Control System of Emulsion Liquid Level Based on Fuzzy-PID ControlLIU Shi-xian, ZHU Hua, WANG Yong, ZHU Feng-peiLaboratory Research17-196Simulink Simulation of Zero Sequence Power Line Selection Algorithm of Underground NUSZHUANG Wei, GONG Mao-fa, QIAN FengLaboratory Research20-247Research of Direct Torque Control System for PMSM Based on Sliding Mode ControlWANG Wei, GUO Feng-yi, CHEN PengLaboratory Research24-288Research of Improved SVPWM Method of 3H-bridges Cascaded Multilevel InverterMA Zhi-xun, HE Feng-you, WANG Dong-dong, DENG YuanLaboratory Research28-319Research of Control Method of Energy Feedback System Based on Space-vectorSONG Shu-zhong, WANG Hao-ran, ZHOU Qiu-yanLaboratory Research32-3510Analysis of Several Bandwidth Estimate Algorithms of TCP and Its ComparisonLaboratory Research35-3811Analysis of Real-time Performance of EPA and Its CalculationJIANG Xiu-zhu, FENG Dong-qin, XU ZhaoLaboratory Research39-4312Research Progress of Topology Control Algorithm of Wireless Sensor NetworksZHU Xiao-ying, LIU Xiao-wen, HU MingLaboratory Research43-4513Research of Location Mechanism for Mobile Node in Dynamic Wireless Sensor NetworksLI Xing-chunLaboratory Research46-4914Analysis of Motion Stability of Main Head of Tube Alill and Its Fuzzy OptimizationLaboratory Research49-5115Analysis Model of Gas Measurement Data Based on Monte Carlo MethodWANG Hong-gang, WU Feng-liang, CHANG Xin-tanTechnical Progress52-5516Research of Distributed Optical Fiber Temperature Measure-ment System in Freezing MonitoringTechnical Progress55-5817Application of Mobile Video Technology in Monitoring and Control System of Underground Locomotive TransportationLI Jing, LI Yu-liang, ZHANG Fa-qiTechnical Progress59-6118Research of Security Assessment System of Coal Mine Based on AHP-FCELI Jin-ming, LI Run, QI Shang-longTechnical Progress61-6419Design of Control System of Mine-used Assembled Switches Based on Embedded SystemZHU Cheng-jie, OUYANG Ming-san, GAO Jun-lingTechnical Progress65-6820Design of a High-voltage Frequency Converting System Based on IGBTZHU Yu-qin, ZHENG Xiao-dong, LIAO Xiao-wei, HAN FangTechnical Progress68-71 