The Experts below are selected from a list of 949368 Experts worldwide ranked by ideXlab platform
Bai Qing-hua - One of the best experts on this subject based on the ideXlab platform.
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Study on the parameter of hybrid electric city bus driving cycle
Journal of Agricultural University of Hebei, 2007Co-Authors: Bai Qing-huaAbstract:City bus driving cycle plays an important role on control strategy of hybrid electric vehicle.A testing system based on Data Stream function of vehicle electronic control system was developed to test the city bus driving cycle.By measuring such parameters as engine speed,throttle position,vehicle speed and passenger number,statistic results indicated that parking Time,vehicle speed,acceleration,deceleration and passenger number accorded with normal school.In all the running Time of a city bus,idle speed Time Account for 25.3 percent,acceleration and deceleration Time 69.1 percent,and even speed Time Account for 5.6 percent only.According to the driving cycle developed,hybrid electric city bus control strategy was optimized.Research result indicated that engine consumed less fuel by such means as engine idle speed cycle limited,using small power engine,improving engine's running state and adopting regenerative brake technic.
Li Jigang - One of the best experts on this subject based on the ideXlab platform.
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Hybrid electric city bus Driving cycle Testing and Analysis Based on Data Stream
2007 8th International Conference on Electronic Measurement and Instruments, 2007Co-Authors: Zhao Shupeng, Zhang Shifang, Li Jiuxi, Li JigangAbstract:City bus driving cycle has important role on control strategy of hybrid electric vehicle. A testing system based on data stream function of vehicle electronic control system was developed to test the city bus driving cycle. By measuring such parameters as engine speed, throttle position, vehicle speed and passenger number, statistic results indicated that parking Time, vehicle speed, acceleration, deceleration and passenger number accorded with normal school. In all the running Time of a city bus, idle speed Time Account for 25.3 percent, acceleration and deceleration Time 69.1 percent, and even speed Time Account for 5.6 percent only. According to the driving cycle developed, hybrid electric city bus control strategy was optimized. Research results indicated that engine consumed less fuel by such means as engine idle speed cycle limited, using small power engine, improving engine's running state and adopting regenerative braking technique.
R. Muñoz Carpena - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of a mechanistic algorithm to calculate the influence of a shallow water table on hydrology sediment and pesticide transport through vegetative filter strips by sensitive analysis
2011Co-Authors: C. Lauvernet, R. Muñoz Carpena, A. Fontaine, Nadia CarluerAbstract:Natural or introduced areas of vegetation, also known as vegetative filter strips (VFS), are a common environmental control practice to protect surface water bodies from human influence. In Europe, VFS are placed along the water network to protect from agrochemical drift during applications in addition to runoff control. Their bottomland placement next to the streams often implies the presence of a seasonal shallow water table which can have a profound impact on the efficiency of the buffer zone. In a companion paper a physically-based algorithm describing ponded infiltration into soils bounded by a water table proposed by Salvucci and Enthekabi (1995), was further developed to simulate VFS dynamics by making it explicit in Time, Account for unsteady rainfall conditions, and by coupling to a numerical overland flow and transport model (VFSMOD). In this paper, we evaluate the importance of the presence of a shallow water table on filter efficiency (reductions in runoff, sediment and pesticide mass), in the context of all other input factors used to describe the system. Global sensitivity analysis (GSA) was used to rank the important input factors and the presence of interactions, as well as the contribution of the important factors to the output variance. GSA allowed us to interpret the results from the multivariate Monte-Carlo uncertainty analysis and gain insights on the management and placement of the buffer systems. In addition, the impact of selecting alternative soil hydraulic functions (Brooks and Corey, van Genuchten or Gardner) on the model sensitivity is discussed.
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Quantification of Shallow Water Table Effects on Vegetative Filter Strips Runoff Sediment and Pesticide Trapping Efficiency
2011Co-Authors: C. Lauvernet, R. Muñoz CarpenaAbstract:Natural or introduced areas of vegetation, also known as vegetative filter strips (VFS), are a common environmental control practice to protect surface water bodies from human influence. In Europe, VFS are placed along the water network to protect from agrochemical drift during applications in addition to runoff control. Their bottomland placement next to the streams often implies the presence of a seasonal shallow water table which can have a profound impact on the efficiency of the buffer zone. In a companion paper a physically-based algorithm describing ponded infiltration into soils bounded by a water table proposed by Salvucci and Enthekabi (1995), was further developed to simulate VFS dynamics by making it explicit in Time, Account for unsteady rainfall conditions, and by coupling to a numerical overland flow and transport model (VFSMOD). In this paper, we evaluate the importance of the presence of a shallow water table on filter efficiency (reductions in runoff, sediment and pesticide mass), in the context of all other input factors used to describe the system. Global sensitivity analysis (GSA) was used to rank the important input factors and the presence of interactions, as well as the contribution of the important factors to the output variance. GSA allowed us to interpret the results from the multivariate Monte-Carlo uncertainty analysis and gain insights on the management and placement of the buffer systems. In addition, the impact of selecting alternative soil hydraulic functions (Brooks and Corey, van Genuchten or Gardner) on the model sensitivity is discussed.
C. Lauvernet - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of a mechanistic algorithm to calculate the influence of a shallow water table on hydrology sediment and pesticide transport through vegetative filter strips by sensitive analysis
2011Co-Authors: C. Lauvernet, R. Muñoz Carpena, A. Fontaine, Nadia CarluerAbstract:Natural or introduced areas of vegetation, also known as vegetative filter strips (VFS), are a common environmental control practice to protect surface water bodies from human influence. In Europe, VFS are placed along the water network to protect from agrochemical drift during applications in addition to runoff control. Their bottomland placement next to the streams often implies the presence of a seasonal shallow water table which can have a profound impact on the efficiency of the buffer zone. In a companion paper a physically-based algorithm describing ponded infiltration into soils bounded by a water table proposed by Salvucci and Enthekabi (1995), was further developed to simulate VFS dynamics by making it explicit in Time, Account for unsteady rainfall conditions, and by coupling to a numerical overland flow and transport model (VFSMOD). In this paper, we evaluate the importance of the presence of a shallow water table on filter efficiency (reductions in runoff, sediment and pesticide mass), in the context of all other input factors used to describe the system. Global sensitivity analysis (GSA) was used to rank the important input factors and the presence of interactions, as well as the contribution of the important factors to the output variance. GSA allowed us to interpret the results from the multivariate Monte-Carlo uncertainty analysis and gain insights on the management and placement of the buffer systems. In addition, the impact of selecting alternative soil hydraulic functions (Brooks and Corey, van Genuchten or Gardner) on the model sensitivity is discussed.
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Quantification of Shallow Water Table Effects on Vegetative Filter Strips Runoff Sediment and Pesticide Trapping Efficiency
2011Co-Authors: C. Lauvernet, R. Muñoz CarpenaAbstract:Natural or introduced areas of vegetation, also known as vegetative filter strips (VFS), are a common environmental control practice to protect surface water bodies from human influence. In Europe, VFS are placed along the water network to protect from agrochemical drift during applications in addition to runoff control. Their bottomland placement next to the streams often implies the presence of a seasonal shallow water table which can have a profound impact on the efficiency of the buffer zone. In a companion paper a physically-based algorithm describing ponded infiltration into soils bounded by a water table proposed by Salvucci and Enthekabi (1995), was further developed to simulate VFS dynamics by making it explicit in Time, Account for unsteady rainfall conditions, and by coupling to a numerical overland flow and transport model (VFSMOD). In this paper, we evaluate the importance of the presence of a shallow water table on filter efficiency (reductions in runoff, sediment and pesticide mass), in the context of all other input factors used to describe the system. Global sensitivity analysis (GSA) was used to rank the important input factors and the presence of interactions, as well as the contribution of the important factors to the output variance. GSA allowed us to interpret the results from the multivariate Monte-Carlo uncertainty analysis and gain insights on the management and placement of the buffer systems. In addition, the impact of selecting alternative soil hydraulic functions (Brooks and Corey, van Genuchten or Gardner) on the model sensitivity is discussed.
Zhao Shupeng - One of the best experts on this subject based on the ideXlab platform.
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Hybrid electric city bus Driving cycle Testing and Analysis Based on Data Stream
2007 8th International Conference on Electronic Measurement and Instruments, 2007Co-Authors: Zhao Shupeng, Zhang Shifang, Li Jiuxi, Li JigangAbstract:City bus driving cycle has important role on control strategy of hybrid electric vehicle. A testing system based on data stream function of vehicle electronic control system was developed to test the city bus driving cycle. By measuring such parameters as engine speed, throttle position, vehicle speed and passenger number, statistic results indicated that parking Time, vehicle speed, acceleration, deceleration and passenger number accorded with normal school. In all the running Time of a city bus, idle speed Time Account for 25.3 percent, acceleration and deceleration Time 69.1 percent, and even speed Time Account for 5.6 percent only. According to the driving cycle developed, hybrid electric city bus control strategy was optimized. Research results indicated that engine consumed less fuel by such means as engine idle speed cycle limited, using small power engine, improving engine's running state and adopting regenerative braking technique.
