1Measuring Rotational Speed of Vertical Spindle for Coalfield DrillersHAO Wei-lai, ZHU En-guoDesign and Research1-2,52Second Generation Wavelet denoising and its Application in Fault DiagnosisJING Shuang-xi, LI Sheng-hua, HUA WeiDesign and Research3-53The Study of Start-stop Equipment for Compressor Based on Wavelet AnalysisCHENG Yan-xia, TIE Zhan-xu, SUN Fu-weiDesign and Research6-7,114Study on Detection Technology of Rated Parameters in Measuring and Controlling System of Magnetic-SwitchgearYOU Guo-dongDesign and Research8-115The Study of Excitation System for VSCF Double Fed Wind Power GeneratorTIAN Hui-fang, CAI TingDesign and Research12-156Method of Fault Diagnosing for Hoist Control System Based on Information Fusion TechnologyWANG Xin, WANG Zhi-zhenDesign and Research16-187Decision Support Technology of State Service for Electrical Power Equipment Based on WEBXU Yun-zhi, ZONG JianDesign and Research19-218The Design of New Energy-saving Water Supply System for Mining AreaLIU Fa-zhi, LI Jan-chaoDesign and Research21-239Study on Open Water System of Water Source Heat PumpsLI Yan, WANG Zhao-wenDesign and Research24-2610DC Chopped-wave Speed Regulating System of Battery Locomotive Based on DSP ControlLI Zhen-bi, SHI Xiao-yanDesign and Research26-2811The Research on Anti-interference Technology of Measuring and Controlling Circuit for ElectromotorWANG De-yu, GAN Jin-yingDesign and Research29-3112Hoist Brake Parameter Test System Based on SCMWU Long, ZHOU Meng-ranIssue Discussion32-3313A New Measuring-Control System of Arc-extinguishing Device with Adjusting Gapped-CoreCHEN Zhong-renIssue Discussion34-3714A Design of Data Acquisition and Transmission Nodes of Water Level Based on Can BusBAI Feng-shan, FAN Daoer-ji, BAO Xiu-rongIssue Discussion37-4015Methane Optic Fiber Sensor Based on Infrared Absorption PrincipleHE Yu-kai, WANG Ru-lin, ZHANG Li, WANG Jian, WU Jiu-yanIssue Discussion41-4416Research on New Explosion-proof Four-circuit Intelligent Combination Switches for MineXU Da, HOU You-fu, RONG Yan-ping, LIU Liang-yongIssue Discussion44-4617Study on Communication System between PLC and Dot Matrix LCDMU Guo-zhen, SONG Jian-chengIssue Discussion47-48,5118Chopper Speed-regulating System for DC Motor Based on MATLABLIU Hai-yanIssue Discussion49-5119The Fault Diagnosis of Coal Mine Ventilator Based on Wavelet Packet DecompositionFU Hua, YIN Li-naIssue Discussion52-5520Integrated Automation System of Coal-mine Based on Industrial Ether-netCAO Mao-hong, XU Zhao, YANG Fen, SUN YanIssue Discussion55-57 