China has lower proportion of privately owned cars. A car is yet a necessity for urban families; but it is gaining pace periodically, leading the upgrading campaign of urban residents consumption.
An energy audit of 22 tertiary hospitals was conducted in Tianjin. The detailed content included design data, basic information, energy bills and equipment lists. It was shown that during the study, the energy intensi...An energy audit of 22 tertiary hospitals was conducted in Tianjin. The detailed content included design data, basic information, energy bills and equipment lists. It was shown that during the study, the energy intensity of hospitals in Tianjin was approximately stable and the average level of energy consumption was 348kW.h/（m2.a）. From the date collected, it was calculated that the energy intensity of general hospitals was 380 kW.h/（m2.a）, and the average carbon emissions was 157kgCO2/（m2.a）; While the energy intensity of specialized hospitals was 309kW＇h/（m2.a）, and the average carbon emissions was 131 kgCO2/（m2. a）. By breaking the energy consumption down into several items, it was found that the heating system consumed the highest amount of energy （42.12%）, followed by the cooling system （6.78%）, the medical equipment （4.98%） and the lighting system （3.63%）. The main factors that affect the hospital energy consumption were determined, and some feasible technology and management measures to save energy and reduce carbon emissions were proposed.展开更多
Many car-following models with their own merits have been proposed to explore various traffic problems,but researchers have rarely used vehicle's performance to evaluate them.In this paper,we study each vehicle...Many car-following models with their own merits have been proposed to explore various traffic problems,but researchers have rarely used vehicle's performance to evaluate them.In this paper,we study each vehicle's fuel consumption of the optimal velocity model,full velocity difference model,full velocity and acceleration difference model and the car-following model with consideration of the traffic interruption probability under two traffic situations,respectively.The numerical results show that the car-following model with consideration of traffic interruption probability can reduce vehicle's fuel consumption in the two studied traffic situations and thus improve the vehicle's fuel economy.展开更多
A novel car-following model is offered based on the cooperative information transmission delayed effect involving headway and velocity under V2 X environment.The stability conditions and m Kd V equation of the new mod...A novel car-following model is offered based on the cooperative information transmission delayed effect involving headway and velocity under V2 X environment.The stability conditions and m Kd V equation of the new model are obtained via the linear and nonlinear analysis.Through numerical simulation,the variation trend of headway and hysteresis phenomenon are studied.In addition,we investigate the additional energy consumption of the vehicle during acceleration.In brief,theoretical analysis and simulation results confirm that the new car-following model based on the cooperative information transmission delayed effect can improve traffic stability and reduce additional energy consumption.展开更多
文摘China has lower proportion of privately owned cars. A car is yet a necessity for urban families; but it is gaining pace periodically, leading the upgrading campaign of urban residents consumption.
文摘An energy audit of 22 tertiary hospitals was conducted in Tianjin. The detailed content included design data, basic information, energy bills and equipment lists. It was shown that during the study, the energy intensity of hospitals in Tianjin was approximately stable and the average level of energy consumption was 348kW.h/（m2.a）. From the date collected, it was calculated that the energy intensity of general hospitals was 380 kW.h/（m2.a）, and the average carbon emissions was 157kgCO2/（m2.a）; While the energy intensity of specialized hospitals was 309kW＇h/（m2.a）, and the average carbon emissions was 131 kgCO2/（m2. a）. By breaking the energy consumption down into several items, it was found that the heating system consumed the highest amount of energy （42.12%）, followed by the cooling system （6.78%）, the medical equipment （4.98%） and the lighting system （3.63%）. The main factors that affect the hospital energy consumption were determined, and some feasible technology and management measures to save energy and reduce carbon emissions were proposed.
基金supported by the National Natural Science Foundation of China(Grant Nos.70971007 and 71271016)the National Basic Research Program of China("973"Project)(Grant No.2012CB725404)
文摘Many car-following models with their own merits have been proposed to explore various traffic problems,but researchers have rarely used vehicle's performance to evaluate them.In this paper,we study each vehicle's fuel consumption of the optimal velocity model,full velocity difference model,full velocity and acceleration difference model and the car-following model with consideration of the traffic interruption probability under two traffic situations,respectively.The numerical results show that the car-following model with consideration of traffic interruption probability can reduce vehicle's fuel consumption in the two studied traffic situations and thus improve the vehicle's fuel economy.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61963008,61673168,1176200412047567)+2 种基金the Guangxi Natural Science Foundation,China(Grant Nos.2022GXNSFDA035080 and 2018GXNSFAA281274)the Guangxi Innovation-Driven Development Special Fund Project,China(Grant No.GUIKEAA19254034-3)the Zhenjiang Science and Technology Project,China(Grant No.GY2020019)。
文摘A novel car-following model is offered based on the cooperative information transmission delayed effect involving headway and velocity under V2 X environment.The stability conditions and m Kd V equation of the new model are obtained via the linear and nonlinear analysis.Through numerical simulation,the variation trend of headway and hysteresis phenomenon are studied.In addition,we investigate the additional energy consumption of the vehicle during acceleration.In brief,theoretical analysis and simulation results confirm that the new car-following model based on the cooperative information transmission delayed effect can improve traffic stability and reduce additional energy consumption.
