1Technology of Detecting Gas Pressure by Puncturing Multi-seam Based on M-Ⅱ Gas Pressure Detector and Casing MethodWANG Fa-kai, JIANG Cheng-lin, GONG Yan-wei, HUANG Xin-yeAchievements of Science and Research1-52Design of Electrical Control System of Controllable Speeder of Belt ConveyorZHANG Hong-wei, WANG Xin-huan, YU Fa-shanAchievements of Science and Research5-93Application of Web Map of Coal Mine Based on SVGWANG Li-li, BAI Xiao-boAchievements of Science and Research9-124Design of a Data Collection Card with High Performance and Low NoiseZHANG Liang, FENG Hao, CHENG Xue-zhen, OIAN Xiao-chao, CAO Mao-yongAchievements of Science and Research12-155Research of a Scheme of Unmanned Storage of Taking Crane as Execution UnitZHU Cheng-jian, LI Dong-xiao, ZHAO Zhi-liAchievements of Science and Research16-186Design of Mine-used Combination Switch Based on PLCYU Qing-lin, WANG Dong, TANG Dong-xu, LI Cui-lanAchievements of Science and Research19-217Research of Movement Theory of Fire Smoke Flow of Mine RoadwayWANG Wen-cai, QIAO Wang, LI Gang, WANG Rui-zhiLaboratory Research22-258An Improved Method of MPPT of Photovoltaic ArrayXU Rui-dong, HU Yi-hua, CHEN Hao, ZUO LanLaboratory Research25-289Research of Pre-peak Deformation Detection of Rock with Fiber Bragg Grating SensingWEI Shi-ming, CHAI Jing, YIN Shi-xianLaboratory Research29-3210Application of Rough Set in Fault Diagnosis of Power TransformerLI Hong, TIAN Mu-qinLaboratory Research32-3511A Protection Algorithm of Filtering Decaying DC ComponentQI Yan, HE Ren-wang, WU XunLaboratory Research36-3912Research of Voltage Source PWM Rectifier Based on LCL FilterHUANG Qiu-yan, ZHANG GeLaboratory Research39-4313Research of Image Enhancement and Contour Extracting Based on Visual C++XIA Hai-boLaboratory Research44-4714Video Detection Algorithm for Object in Dangerous Area of Mine Based on Background RegistrationQU Fan-fei, WANG Zhi-feng, TIAN Jian-junLaboratory Research48-5015A New Algorithm of Automatic Generation of Double-line Laneway Based on CenterlineWANG Dong-ruiLaboratory Research51-5516PWM Control System of DC Motor Based on FPGALU Bin, SU Cheng-gongLaboratory Research55-5817Characteristics and Key Technologies of Digital Coal MinePAN Tao, LIANG HongProblem Discussion59-6218Research of Intelligent Mine System Based on Internet of ThingsXIE Hai-dong, LI Song-lin, WANG Chun-lei, ZHOU LiangProblem Discussion63-6619Design of Mine-used Substation with High ReliabilityZHU Qian-wei, LIU Chun-xiaExperience Exchange67-7020Design of a New Type of Communication SubstationXU Le-nian, GAO Shuang, LI Wen-jingExperience Exchange70-73 