This paper presents the results of research and analysis on the quality of the living environment in the heart of small urban centers. These cities are regarded as an attractive area of residence, among others, due to...This paper presents the results of research and analysis on the quality of the living environment in the heart of small urban centers. These cities are regarded as an attractive area of residence, among others, due to the fulfillment of human needs concerning the contact with nature （green） and living with a sense of intimacy, security and peace. Presented results concern the center of Jarostaw and Laficut. Although both cities are located in an underdeveloped region of south-eastern Poland, they have an opportunity to create a positive image of the city center, where not only attractive architectural objects can be found, but also small-town atmosphere, and natural values forming positive relationships between human and the elements of environment.展开更多
Although electric vehicle fully exhibits its comparative merits of energy conservation and environmental friendliness, further improvement of its traction energy efficiency lacks comprehensive investigations in the pa...Although electric vehicle fully exhibits its comparative merits of energy conservation and environmental friendliness, further improvement of its traction energy efficiency lacks comprehensive investigations in the past. In this paper, the effect of the torque vectoring on traction energy conservation during cornering for a rear-wheel-independent-drive electric vehicle is investigated.Firstly, turning resistance coefficient and energy conservation mechanism of torque vectoring are derived from the single track dynamic model. Next, an optimal torque vectoring control strategy based on genetic algorithm is proposed, with the consideration of the influence of the operation-point change of the in-wheel motors, to find out the best torque vectoring ratio offline. Finally,various simulation tests are conducted to validate the energy conservation effect after Simulink modelling. The results verify that though the optimization of the operating region of the motors is the main part for tractive energy conservation, the contribution of torque vectoring itself can reach up to 1.7% in some typical cases.展开更多
文摘This paper presents the results of research and analysis on the quality of the living environment in the heart of small urban centers. These cities are regarded as an attractive area of residence, among others, due to the fulfillment of human needs concerning the contact with nature （green） and living with a sense of intimacy, security and peace. Presented results concern the center of Jarostaw and Laficut. Although both cities are located in an underdeveloped region of south-eastern Poland, they have an opportunity to create a positive image of the city center, where not only attractive architectural objects can be found, but also small-town atmosphere, and natural values forming positive relationships between human and the elements of environment.
基金supported by the National Natural Science Foundation of China(Grant No.51205153)the Natural Science Foundation of Jilin Province(Grant No.20140101072JC)the 2018"13th Five-Year"Scientific Research Planning Project of the Education Department of Jilin Province as well as the 2018 Science and Technology Development Plan of Jilin Province-International Science and Technology Cooperation Project(Grant No.20180414011GH)
文摘Although electric vehicle fully exhibits its comparative merits of energy conservation and environmental friendliness, further improvement of its traction energy efficiency lacks comprehensive investigations in the past. In this paper, the effect of the torque vectoring on traction energy conservation during cornering for a rear-wheel-independent-drive electric vehicle is investigated.Firstly, turning resistance coefficient and energy conservation mechanism of torque vectoring are derived from the single track dynamic model. Next, an optimal torque vectoring control strategy based on genetic algorithm is proposed, with the consideration of the influence of the operation-point change of the in-wheel motors, to find out the best torque vectoring ratio offline. Finally,various simulation tests are conducted to validate the energy conservation effect after Simulink modelling. The results verify that though the optimization of the operating region of the motors is the main part for tractive energy conservation, the contribution of torque vectoring itself can reach up to 1.7% in some typical cases.
