交通瓶颈处局域密度时间序列的长程相关性  

Long-range Correlation Analysis of Time Series at Traffic Bottleneck

作　　者：贾丽斯[1,2] 盘薇 陈栋[4] 薛郁[1] 

机构地区：[1]广西大学物理科学与工程技术学院,广西南宁530004 [2]广西大学行健文理学院,广西南宁530005 [3]香港城市大学建筑学及土木工程学系 [4]重庆大学自动化学院,重庆400044

出　　处：《广西科学》2016年第3期216-222,共7页Guangxi Sciences

基　　金：国家自然科学基金项目(11262003);广西自然科学基金项目(20140593);广西研究生创新项目(YCSZ2012013);广西大学行健文理学院基金项目(2015ZKLX04)资助

摘　　要：【目的】为研究交通相的相关特性,对交通瓶颈处的交通数据作长程相关性分析。【方法】利用元胞自动机建立含有局部缩减道路的三相交通流KKW模型,对交通瓶颈处3个交通相的流量、速度及密度的时间序列进行研究:分别应用R/S分析方法和去趋势涨落分析(DFA)方法对交通瓶颈附近局域密度的时间序列作长程相关性分析,并与交通流元胞自动机NaSch模型的长程相关性分析结果进行比较。【结果】交通同步流的局域密度具有长程相关性,在自由流和宽运动堵塞时对应的局域密度时间序列具有长程反相关。而NaSch模型模拟的局域密度序列无论是自由流还是交通拥堵都呈现长程反相关。【结论】交通瓶颈处呈现交通同步流,且交通同步流具有长程相关性。Objective]The different phases of traffic are identified via performing the long-range correlation for traffic time series at traffic bottleneck.[Methods]Based on the Kerner-Klenov-Wolf （KKW）cellular automaton traffic model,a two-lane traffic model with partial reduced lane is proposed.The rescaled range analysis （R/S）method and detrended fluctuation analysis （DFA）method were performed for analyzing local density time series at traffic bottleneck.Mo-reover,NaSch traffic model was used to carry out similarity discussions.[Results]It is found that traffic synchronized flow emerges at a traffic bottleneck and has long-rang correlated char-acteristics,where free-flow and wide moving j am have long-rang anti-correlation by simulation. The free-flow and wide moving j am reproduced by NaSch model have the long-rang anti-correla-tion characteristic,compared with the KKW model.[Conclusion]The traffic synchronized flow caused by traffic bottleneck has long-rang correlated characteristics.

关 键 词：交通瓶颈 三相交通流 R/S分析 去趋势涨落分析(DFA) 长程相关性 

分 类 号：U491[交通运输工程—交通运输规划与管理]