Intellectualization has become a new trend for telecom industry, driven by intelligent technology including cloud computing, big data, and Internet of things. In order to satisfy the service demand of intelligent logi...Intellectualization has become a new trend for telecom industry, driven by intelligent technology including cloud computing, big data, and Internet of things. In order to satisfy the service demand of intelligent logistics, this paper designed an intelligent logistics platform containing the main applications such as e-commerce, self-service transceiver, big data analysis, path location and distribution optimization. The intelligent logistics service platform has been built based on cloud computing to collect, store and handling multi-source heterogeneous mass data from sensors, RFID electronic tag, vehicle terminals and APP, so that the open-access cloud services including distribution, positioning, navigation, scheduling and other data services can be provided for the logistics distribution applications. And then the architecture of intelligent logistics cloud platform containing software layer(SaaS), platform layer(PaaS) and infrastructure(IaaS) has been constructed accordance with the core technology relative high concurrent processing technique, heterogeneous terminal data access, encapsulation and data mining. Therefore, intelligent logistics cloud platform can be carried out by the service mode for implementation to accelerate the construction of the symbiotic win-winlogistics ecological system and the benign development of the ICT industry in the trend of intellectualization in China.展开更多
The dynamic model of a high-speed electric multiple unit(EMU)is established based on the theory of rigid-flexible coupling multi-body system dynamics.Depending on the actual operating conditions of the vehicle,there a...The dynamic model of a high-speed electric multiple unit(EMU)is established based on the theory of rigid-flexible coupling multi-body system dynamics.Depending on the actual operating conditions of the vehicle,there are a variety of conditions of car body load-time history.We assess ineffective amplitude omission,load spectrum extrapolation,and extreme determination through the car body load-time history,and then obtain the car body fatigue load block spectrum.Finally,we perform a fatigue strength test on the whole car body on a car body fatigue test bench.It is shown that the accelerations of the three directions of the vehicle car body increase with increasing speed.When the train passes a curve,the lateral acceleration average becomes greater.There is also an increase in the car body accelerations in three directions when the train goes through a turnout or twisted line.Under the condition of a failed spring,the vertical acceleration of the car body is obviously increased.Anti-yaw damper failure will cause a significant increase in vehicle lateral acceleration.The failure of lateral and vertical dampers on the second suspension causes an insignificant acceleration increase in three directions.The car body acceleration increases the wear-type profile relative to the original profile in various working and speed level conditions a little.The influence on the damage of vehicle car body under various working conditions is predicted according to the obtained load spectrum.展开更多
基金supported in part by National Key Research and Development Program under Grant No. 2016YFC0803206China Postdoctoral Science Foundation under Grant No.2016M600972
文摘Intellectualization has become a new trend for telecom industry, driven by intelligent technology including cloud computing, big data, and Internet of things. In order to satisfy the service demand of intelligent logistics, this paper designed an intelligent logistics platform containing the main applications such as e-commerce, self-service transceiver, big data analysis, path location and distribution optimization. The intelligent logistics service platform has been built based on cloud computing to collect, store and handling multi-source heterogeneous mass data from sensors, RFID electronic tag, vehicle terminals and APP, so that the open-access cloud services including distribution, positioning, navigation, scheduling and other data services can be provided for the logistics distribution applications. And then the architecture of intelligent logistics cloud platform containing software layer(SaaS), platform layer(PaaS) and infrastructure(IaaS) has been constructed accordance with the core technology relative high concurrent processing technique, heterogeneous terminal data access, encapsulation and data mining. Therefore, intelligent logistics cloud platform can be carried out by the service mode for implementation to accelerate the construction of the symbiotic win-winlogistics ecological system and the benign development of the ICT industry in the trend of intellectualization in China.
基金the Science and Technology Innovation Program of Central Universities(No.2682019CX45),China。
文摘The dynamic model of a high-speed electric multiple unit(EMU)is established based on the theory of rigid-flexible coupling multi-body system dynamics.Depending on the actual operating conditions of the vehicle,there are a variety of conditions of car body load-time history.We assess ineffective amplitude omission,load spectrum extrapolation,and extreme determination through the car body load-time history,and then obtain the car body fatigue load block spectrum.Finally,we perform a fatigue strength test on the whole car body on a car body fatigue test bench.It is shown that the accelerations of the three directions of the vehicle car body increase with increasing speed.When the train passes a curve,the lateral acceleration average becomes greater.There is also an increase in the car body accelerations in three directions when the train goes through a turnout or twisted line.Under the condition of a failed spring,the vertical acceleration of the car body is obviously increased.Anti-yaw damper failure will cause a significant increase in vehicle lateral acceleration.The failure of lateral and vertical dampers on the second suspension causes an insignificant acceleration increase in three directions.The car body acceleration increases the wear-type profile relative to the original profile in various working and speed level conditions a little.The influence on the damage of vehicle car body under various working conditions is predicted according to the obtained load spectrum.
