1Measuring Method of Reliability Indexes of Safety Monitoring and Control System of Coal MineZOU Zhe-qiangAchievements of Science and Research1-42Testing and Analyzing of EMI in Central Substation of Coal Mine UndergroundSUN Ji-ping, WANG Fu-zengAchievements of Science and Research4-63Implementation of Audio and Video Transmission by Satellite of Communication Device for Emergency Rescue Commanding in MineZHENG Wan-bo, WU Yan-qing, KANG Hou-qing, QIN WeiAchievements of Science and Research7-104Research of a New Type of Measuring Device for Air Flow and Air Pressure of Mine-used Local FanAchievements of Science and Research11-145Research of Early Warning System for Danger Source in Process of Tunnel Drifting of High Outburst MineZHAO Wei, BAI Fa-song, WU Hang, DANG Bao-quan, LIN Xiao-boAchievements of Science and Research14-176Design of Vertical Plumb Coordinatograph Based on CCDXU Le-nian, XU Cheng-gong, YUN Yu-liangAchievements of Science and Research18-227Development of a Leakage Protector with Additional DC SourceGAO YunAchievements of Science and Research22-248Pipeline Detection System Based on Geomagnetic ImagingWANG Shu-shen, ZHANG Song, ZHAO Yan-sheng, L(U) Wen-feng, LIU De-junAchievements of Science and Research25-289Design of Controller for Four-phase Stepping Motor Based on FPGAHUANG Zhi-wen, HU Xiao-lan, SHAO PingAchievements of Science and Research29-3210Design of a New Type of Control System for Free-swing Fire MonitorZHANG Yong-gao, LI Yin-ling, HU Ai-hua, NIE Shui-guoAchievements of Science and Research32-3511Determination of Reasonable Size of Protection Pillars for Crossheading on Super Long Working FaceZHANG Fei, FAN Wen-sheng, SUN Jian-ling, LAN Yi, TIAN Wu-qiangLaboratory Research36-4012Research of Expert System of Fault Diagnosis for Asynchronous Motor Based on Neural NetworkHAI Zhen-hong, TIAN Mu-qinLaboratory Research41-4413Research of Fault Diagnosis of Mine Hoist Based on BP Neural NetworkLaboratory Research44-4714Design of a Fuzzy Control System for FanLaboratory Research47-4915Finite Element Analysis and Optimization Design of Movable Arm of Loader's Working Equipment Based on Pro/EDAI Xue-fenLaboratory Research50-5216Method of Islanding Detection of Positive Feedback and Active Frequency Drift with Variable Cofficient in PV Grid-connected Power SystemLaboratory Research52-5417Application of SMVSC-PI MPPT Stratage in PV SystemLaboratory Research55-5918Application of TLM Method in Distribution of Field Intensity of Lossy MediumLaboratory Research59-6219Equipment Spot Inspection System Based on Wireless CommunicationLI Jin-qing, KE JingExperience Exchange63-6720Design of Video Monitoring System of Coal Mine Based on Embedded Web ServerTANG Lian-qiao, HE Wei-xing, L(U) Jun-longExperience Exchange67-70 