In order to minimize the delays and stops caused by the early started coordinated green phase of the vehicle- actuated signal systems, a stochastic offsets calculation method based on the new types of advanced traffic...In order to minimize the delays and stops caused by the early started coordinated green phase of the vehicle- actuated signal systems, a stochastic offsets calculation method based on the new types of advanced traffic management system （ATMS） data is proposed. As the mainline green starts randomly in vehicle-actuated signal systems, the random theory is applied to obtain the distribution of the unused green time at side streets based on the green gap-out mechanism. Then, the green start time of the mainline can be selected at the point with maximum probability to minimize the delays or stops caused by the randomly started mainline green. A case study in Maine, USA, whose traffic conditions are similar to those of the middle-size Chinese cities, proves that the proposed method can significantly reduce the travel time and delays.展开更多
提出了一种高速公路电动汽车充电站日负荷随机模糊建模方法。首先,基于某高速公路实际数据,分析工作日与节假日两种时间类型下的日车流量概率分布特征并拟合其概率密度函数,发现该函数参数具有模糊特性。然后,采用极大似然法分别对该两...提出了一种高速公路电动汽车充电站日负荷随机模糊建模方法。首先,基于某高速公路实际数据,分析工作日与节假日两种时间类型下的日车流量概率分布特征并拟合其概率密度函数,发现该函数参数具有模糊特性。然后,采用极大似然法分别对该两种时间类型下的日车流量函数参数进行模糊特征挖掘,在置信区间内定义其边界,从而分别建立两种时间类型下的日车流量随机模糊模型。进而考虑车辆类型、充电开始时间、各时段进站车流量和初始荷电状态(State of Charge,简称SOC)等因素,建立高速公路充电站日充电负荷随机模糊模型。最后,运用蒙特卡洛模拟输出结果,验证了该方法的有效性和正确性。展开更多
基金The National Natural Science Foundation of China(No. 50422283 )China Postdoctoral Science Foundation (No.20110491333)
文摘In order to minimize the delays and stops caused by the early started coordinated green phase of the vehicle- actuated signal systems, a stochastic offsets calculation method based on the new types of advanced traffic management system （ATMS） data is proposed. As the mainline green starts randomly in vehicle-actuated signal systems, the random theory is applied to obtain the distribution of the unused green time at side streets based on the green gap-out mechanism. Then, the green start time of the mainline can be selected at the point with maximum probability to minimize the delays or stops caused by the randomly started mainline green. A case study in Maine, USA, whose traffic conditions are similar to those of the middle-size Chinese cities, proves that the proposed method can significantly reduce the travel time and delays.
文摘提出了一种高速公路电动汽车充电站日负荷随机模糊建模方法。首先,基于某高速公路实际数据,分析工作日与节假日两种时间类型下的日车流量概率分布特征并拟合其概率密度函数,发现该函数参数具有模糊特性。然后,采用极大似然法分别对该两种时间类型下的日车流量函数参数进行模糊特征挖掘,在置信区间内定义其边界,从而分别建立两种时间类型下的日车流量随机模糊模型。进而考虑车辆类型、充电开始时间、各时段进站车流量和初始荷电状态(State of Charge,简称SOC)等因素,建立高速公路充电站日充电负荷随机模糊模型。最后,运用蒙特卡洛模拟输出结果,验证了该方法的有效性和正确性。
