1Communication in Coal Mines of China and Its Future DevelopmentGUO Chengwei, XU Wei, TANG Zhaoguang1-32Model KT14 Full Duplex and Honeycomb Mobile Communication System in Mine UseHU Suiyan4-53Microcomputer-based Detection of Short-circuit Fault Between Stators of Asynchronous MotorsDONG Aihua, WANG Fuzhong, GAO Yan6-74Methane Sensors with Zero Self-adjustmentWANG Rulin, ZHAO Gang8-105Model KDK4 Mine Used Flamproof Motor Softstart Controller11-136Mathematical Model and Its Calculation of Dynamic Reliability for Mine MachineryZHONG Ying13-157Analysis in Accuracy of Electronic Weigher16-188Discussion in a Couple of Problems from Database to Data Warehouse19-209Design of Fault Diagnostic Expertise System for Electrical Facilities in Power PlantsLI Jianglin21-2210Application of PLC in Electronic-controlled System for A.C Eletro-hauled Shearer23-2511Monitoring and Diagnosing Main Shaft Winder with CDMS System26-2812Renovation of Control Device for Skip LoadingLIU Feng, ZHAO Fengwu28-2913Application of Inter-mediate Frequency Power Supply in Coal Mine Cutter Bits Factory30-3014The Development and Application of Auto-controlled and Management System Used for Coal-sale MeasureMENG Xianhua31-3215Process Management System for CIMS in Coal Preparation PlantsCHENG Jian, XU Shifan, GUO Xijin33-3516Discussion in Software of CGW Methane Sensor35-3617Computer-based Sound and Time Recording System Utilizing Novel Telephone Speech CardQIAN Lu, HUO Zhenlong, WANG Senhua37-3918Development of Drawing Program for Mine Ventilation System Plan39-4119A Valve Leg Testing Stand with Digital Displays42-4320Real-time Dynamic Monitoring System for Parameters of Mine Fan Air Volume43-44 