1A Two-way Remote Control Alarming System with the Functions of Self-check and InquiryLI Qing-wu, SHENG Hui-xing, WANG Jian-yong1-32Design of Mine Methane Sensor Based on DSPJIANG Jian-ming, WANG Zheng-hong4-53Study on the Security of Information Issuing of Monitoring and Control System for Mine Safety and ProductionHU Yan-jun, MA Xiao-ping6-84Study on the Algorithm of Storage and Compression for Historical Data of Mine Safety and Monitoring and Control SystemHAU Gang, ZHU Er-li, YAN Jun-hua8-105The Expert System of Fault Diagnosis of Hydraulic SystemLI Xiao-qing, ZHANG Wen-xiang11-136Research of Mine Monitoring and Control Software Based on COM TechnologyLU Peng-fei13-167Application of Single-chip Microcomputer in Soft Start of AC Motor17-198Research on Error Correction Technology of VoD System of Distributed and Multi-server Structure20-229Study on the PWM Control Method22-2510Development of Ultrasonic Water Level of Statical Force25-2711The Security Study of Coal Mine Information System Based on Computer NetworkPAN Yu28-3112Research of Underground Alarming System of Temperature and Humidity Based on Zero-cross Modulation TechnologyCHEN Yong-Li, WANG Chang-long, LI De-Liang31-3313Design of Automatic Coal Blending System Based on Expert and PID ControlQI Mei-xing, ZHANG Yu, SUN Wei34-3614Phase-to-ground Protection Device in Ineffectively Grounding System Based on 80C196KBZI Xing-jian, WANG Jian-ping, XU Zhong36-3815The Selection of Frequency Groups of Mine-used Wireless Communication SystemCAO Yu-Hong38-4016Design of Management System of Coal Transportation and Sale for Coal MineCHEN Shi-wei, QU Yong-hua41-4217Design and Implementation of Mining Linkage Management System of Coal Mine43-4418Design of Network Control System of Aluminium Electrolysis Based on Field Bus45-4719Analysis of Automatic Lifting Technology of Shearer DrumLI Chun-hua, LIU Chun-sheng48-5120Analysis and Design of Coal Mine Measuring SystemREN Yong-chang, HAN Yu-xin, WANG Jin-quan51-54 