1Case Analysis of Gas Explosion Disaster of Coal Mine without Safety Monitoring SystemSUN Ji-pingAchievements of Science and Research1-42Design of System Configuration Information Maintenance Component of Software for Informatization of Coal MineXI Dong-qin, YAN Zhao-zhen, GAO WenAchievements of Science and Research5-73Design of File Synchronization Component of Monitoring and Control System for Coal Mine SafetyZHANG Yu, HE Yao-yi, WANG Yong, CHEN Xiao-lin, GAO WenAchievements of Science and Research8-104Research of Construction of Digital Mine of Shenhua GroupHAN Jian-guo, YANG Han-hong, WANG Ji-sheng, ZHANG An, PAN TaoAnalysis Research11-145Research of Coal Spontaneous Combustion Accident Based on Hierarchy Importance Causal Analysis MethodTIAN Shui-cheng, WANG Xi, LIU Zhen-guo, SHEN Qing-taoAnalysis Research14-166Technical Advantages of Application of TD-SCDMA Communication System in Coal MineYU Jin-tao, GU Yi-dongAnalysis Research16-187Analysis of Solution of Private Network for Coal Mine Based on TD-SCDMAWANG An-yi, LIU Jiao-yang, QIU Xiao-li, ZHANG QianAnalysis Research19-228Evaluation of Coal Mine Informatization Level Based on Entropy Weight Method and Grey Correlation Degree MethodGONG Wen, LI Long-qing, XU Yong-gangAnalysis Research23-259Construction Ideas of Management Platform of Production Safety Dispatching of Coal Enterprise GroupWANG Yuan, HAN An, CHAO Xiao-feiAnalysis Research26-2810Research of Semi-supervised Regression Algorithm Based on Density DistributionZHANG Qian, LI Ming, WANG Xue-songAnalysis Research29-3011Research of TOA Ranging Method in Wireless Sensor NetworkLIU Shi-sen, TANG Chao-ming, WU WeiLaboratory Research31-3412Measuring Method of Intensity of Ultrasonic Cavitation Based on Time-difference MethodXU FeiLaboratory Research34-3713Harmonic Detection Method in Power Network Based on FFT AlgorithmZHOU Xue-fengLaboratory Research38-4014Comparation of Two Designs of Switching Power Supply with High Power FactorZHENG Zheng, CHEN Di-leiLaboratory Research41-4415Methods of Measurement and Prediction of Grounding Resistance of ArresterSUN Feng, NIU Hong-keLaboratory Research45-4716Design of Reactive Power Compensation System Based on Phase-controlled Switching TechnologyLIU Dan, LI Jian, LIU Qiao-chu, WANG Yu-fengLaboratory Research48-5117Line Selection Method of Selective Leakage Protection Based on Characteristic Quantity of Zero Sequence CurrentZHANG Guo-jun, SU Ke-jiaLaboratory Research51-5418Design of Control System of Roadheader Based on DSP and CPLDHU Shou-xinExperience Exchange55-5719Remote Upgrade Resolution of Safety Monitoring and Control Sub-station of Coal MineSUN Gang, ZHU Zhong-chang, JING Zhen-xingExperience Exchange58-6020Optimization of Ventilation System of Coal MineZOU Xiao-fu, MA Xiao-ping, JIAO Xiao-yu, QIAO Jian-junExperience Exchange61-62 