摘要
在一维局部作用元胞自动机（ＣＡ）交通流模型中，引入刹车噪声与产生、消失概率，得到一个完全随机的ＣＡ交通流模型．利用平衡自旋理论对该模型的研究表明，当Ｐｉｎ＝Ｐｏｕｔ≠０时，初始密度分布不影响系统的最终状态，求得ρｔ＝０５；当满足条件Ｐｉｎ＋Ｐｂ＝１与Ｐｉｎ＝Ｐｏｕｔ时，得到简单的“线性”模型，该模型在条件｜１－２Ｐｉｎ｜＝１下，表现出长程相关，导致严重交通“阻塞”的出现．理论结果与计算机实验一致．
Abstract In this paper we present an entirely random traffic flow model by introducing brake,creation and disappearance probabilities into 1D local interactive cellular automota.By means of epuilibrium spin theory,we find that when P in = P out ≠0,the final density of the model is t =0 5 and independent of initial density distribution.When the conditions P in + P b=1 and P in = P out are satisfied,we get a simple “linear” traffic flow model that displays long distance correlation under the condition |1-2 P in |=1 and leads to a serious traffic jam.The cemputer simulation results agree with the theoretical prediction.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第11期1761-1768,共8页
Acta Physica Sinica
基金
国家自然科学基金
广西壮族自治区自然科学基金
