放弃NS模型对道路和速度进行离散的方法,采用连续的位置和速度参量,在NS模型的基础上,只改变了模型中的车子长度、加速、减速3个参数。通过数值模拟,得到了汽车的长度、加速度和减速度在交通流量中的影响规律,并发现了在低加速、高减速条件下无临界行为,而在低加速、低减速时基本图中出现了亚稳态。
The discrete method in road and speed, used in the cellular automaton model of Nagel and Schreckenberg ( NS model)is replaced by the consecutive situation and speed parameter . Based on NS model ,the parameters of vehicle length, acceleration and deceleration are modified. With numerical simulation,their affective effect in traffic flow is observed, non-critical behavior under low-acceleration and upper-deceleration and metastable state under low-acceleration and low-deceleration in fundamental diagram.