Project supported by National Natural Science Foundation: Time-varying multi-state failure modeling theory and analytical method of high-speed EMU braking system; Sub-topics of major projects of the National Twelfth Five-Year Plan: development and testing of information acquisition and diagnostic equipment test platform for vehicle running gear; Science and technology star project: the development of brake pair and its safety monitoring system for urban rail vehicles; Nanyang shock absorber factory: design optimization of suspension comprehensive parameters and fatigue life calculation of shock absorber development; Beijing Municipal Science and Technology Commission, Beijing Institute of Printing: development and testing of electric vehicle demonstration operation state monitoring and energy consumption analysis system; Beijing Zongheng Electromechanical Co., Ltd.: Strength check and fatigue calculation of fixing bolts for tread braking unit; China academy of railway sciences: Study on residual stress of high-speed train wheels; Enterprise project: development of online monitoring system for tailings pond; Enterprise project: parameter optimization and comprehensive performance test of bridge structure; The academic innovation team project of Beijing municipal universities: key technologies of running state monitoring, fault diagnosis and self-traction of urban rail vehicles.