1The Nonlinear Correction of Methane Sensor Based on Neural NetworkLIU Gang, LIU Xue-ren, CAI Shi-huaLaboratory Research1-42The Application of PC104 Embedded System in the Measuring System of Initial Desorption GasCHEN Zhuan, CHEN Song-li, LI Kui, CHEN ChunLaboratory Research5-73A New Method for Automatically Diagnosing Broken-bar Fault of Rotor of Asynchronous Motor Based on BP NetworkZHANG Jian-wen, ZUO Guan-fang, YU Jiang, ZHANG QiangLaboratory Research8-114The Y-△ Voltage-reduced Start Circuit with Two Contactors for Three-phase Asynchronous MotorYUAN Zeng-min, GUO Min-li, YOU De-yiLaboratory Research11-135The Research of Bridge Circuit with Constant Temperature Detection of Catalyst Combustion Methane SensorJIANG Lei, LIU Fang-huaLaboratory Research14-166The Research of Automatic Tracking Compensation Device of Distribution SystemZHANG Fang-jun, ZHOU Yan-qunLaboratory Research16-197The Research of the Fuzzy-PI Control System for Over-heated Steam Temperature of Coal BoilerZHENG Ming-fangLaboratory Research19-218The Thermal Protector with Single-chip Microcomputer Based on Fuzzy ControlSHI Zhao-yuan, GUO Feng-yiTechnical Progress22-259The Design of the Load Measuring System of Ball Crusher Based on FPGA and Embedded Soft Core NIOSLUO Xiao-yan, YANG Li-rongTechnical Progress26-2910The Application of Frequency-conversion Speed-regulating Technology in Mine-used Electric Locomotive Based on AVR Single-chip MicrocomputerTechnical Progress29-3211The Estimationg and Managing Database of Coal-bed Gas Resource in Coal Field on VCTechnical Progress32-3412The Design of the Information Management System of Comprehensive Production Statistics for Coal Enterprises and Its ImplementationZHANG Xiao-yan, GONG Shang-fuTechnical Progress35-3713The Design of the Intelligent Monitoring and Control System of Coal Mine Safety Based on CAN BusXIA Wei, DING Gang, YAN HuiTechnical Progress37-3914The Design of the Software for Enhancing Reliability of PLC Control SystemTechnical Progress39-4215The Design of the Modules of Data Storage and Enquiry in Monitoring and Control System of Mine HoistTechnical Progress42-4416The Design of the Microcomputer Control System of Injection Pump Testing Bench and Its ImplementationTechnical Progress44-4617The Design of the Monitoring and Protection Device of Mine-used Intelligent Power Switch Based on MSP430F448Technical Progress47-4818The Development of DC Current Source System with High-accuracy Based on Single-chip MicrocomputerTechnical Progress49-5019The Application of a New Design Idea of Software System in SBR Wastewater Treatment Control SystemTechnical Progress51-5320The Research of Phase-sensitive Short-circuit Protection in Mine-used Low-voltage Feeder SwitchGAO Jun-ling, WANG Qing-ling, ZHU Yong-meiTechnical Exchange54-56 