Frequent stops and starts for the traffic lights as well as acceleration/deceleration, rather than at constant speed, are the most common transient operating conditions. Consequently, understanding the dynamic charact...Frequent stops and starts for the traffic lights as well as acceleration/deceleration, rather than at constant speed, are the most common transient operating conditions. Consequently, understanding the dynamic characteristics of the powertrain system is vitally important in designing an efficient and fresh vehicle. To investigate the dynamic characteristics of the road vehicle performance, apart from a real road testing, it is necessary to set up a numerical test bed for dynamic performance simulation. The latter is even more convenient, costless and data repeatable. However, the aim of the present paper is to establish a computer simulation package by which the road vehicle power-train system design is developed for a small passenger vehicle based on fuel economy and performance. Furthermore, a proposed professional computer program of Automated Manual Transmission (AMT) system related to organizer algorithm of attractive gearshift requests is also introduced. The result of the proposed AMT ensures that the drive wheels force balance in order to keep gear shift, to kick down or up not only shift feel? but also the fuel consumption, and to alarm by near a specific failure or to get back system performance.展开更多
Mathematically simulated energy transfers from the energy source to the chassis through hydro transmissions and hydro differential. The developed unified mathematical model of a dynamic system allows, at the design st...Mathematically simulated energy transfers from the energy source to the chassis through hydro transmissions and hydro differential. The developed unified mathematical model of a dynamic system allows, at the design stage, of many branched drive mechanisms, including transmission hydraulic and hydraulic differential actuators, to explore dynamic processes and select rational parameters.展开更多
Designing low-cost,high-performing electrocatalysts is key to green energy development,yet relying solely on the"synthesis-characterization"catalyst screening model is time-consuming and costly.There are two...Designing low-cost,high-performing electrocatalysts is key to green energy development,yet relying solely on the"synthesis-characterization"catalyst screening model is time-consuming and costly.There are two main applications for Molecular dynamics(MD)simulations in electrochemical reactions:explaining mechanisms and predicting performance,which play important roles in fabricating robust electrocatalysts.MD simulations of electrocatalysis include the adsorption and desorption of reactants,intermediates,and products in this review.The structural changes in active centers under various electric field states,the effects of alkali metal cations,common anions,and pH effects in the electrolyte on the electrocatalytic process are also discussed to reveal the reaction mechanism.Then the prediction of the catalysts performance in specific reaction using MD simulations are introduced.Finally,the optimization and challenges of MD techniques are discussed.展开更多
文摘Frequent stops and starts for the traffic lights as well as acceleration/deceleration, rather than at constant speed, are the most common transient operating conditions. Consequently, understanding the dynamic characteristics of the powertrain system is vitally important in designing an efficient and fresh vehicle. To investigate the dynamic characteristics of the road vehicle performance, apart from a real road testing, it is necessary to set up a numerical test bed for dynamic performance simulation. The latter is even more convenient, costless and data repeatable. However, the aim of the present paper is to establish a computer simulation package by which the road vehicle power-train system design is developed for a small passenger vehicle based on fuel economy and performance. Furthermore, a proposed professional computer program of Automated Manual Transmission (AMT) system related to organizer algorithm of attractive gearshift requests is also introduced. The result of the proposed AMT ensures that the drive wheels force balance in order to keep gear shift, to kick down or up not only shift feel? but also the fuel consumption, and to alarm by near a specific failure or to get back system performance.
文摘Mathematically simulated energy transfers from the energy source to the chassis through hydro transmissions and hydro differential. The developed unified mathematical model of a dynamic system allows, at the design stage, of many branched drive mechanisms, including transmission hydraulic and hydraulic differential actuators, to explore dynamic processes and select rational parameters.
基金supported by National Nature Science Foundation of China(Nos.51864024,21862011)Research Grants Council of the Hong Kong Special Administrative Region,China(Project No.CityU 11206520).
文摘Designing low-cost,high-performing electrocatalysts is key to green energy development,yet relying solely on the"synthesis-characterization"catalyst screening model is time-consuming and costly.There are two main applications for Molecular dynamics(MD)simulations in electrochemical reactions:explaining mechanisms and predicting performance,which play important roles in fabricating robust electrocatalysts.MD simulations of electrocatalysis include the adsorption and desorption of reactants,intermediates,and products in this review.The structural changes in active centers under various electric field states,the effects of alkali metal cations,common anions,and pH effects in the electrolyte on the electrocatalytic process are also discussed to reveal the reaction mechanism.Then the prediction of the catalysts performance in specific reaction using MD simulations are introduced.Finally,the optimization and challenges of MD techniques are discussed.
