Power-law fluctuation in expressway traffic flow: Detrended fluctuation analysis

被引：12

作者：

Tadaki, S ^{[1
]}

Kikuchi, M

Nakayama, A

Nishinari, K

Shibata, A

Sugiyama, Y

Yukawa, S

机构：

[1] Saga Univ, Comp & Network Ctr, Saga 8408502, Japan

[2] Osaka Univ, Cybermedia Ctr, Toyonaka, Osaka 5600043, Japan

[3] Univ Ryukyus, Dept Phys & Earth Sci, Okinawa 9030213, Japan

[4] Univ Tokyo, Dept Aeronaut & Astronaut, Tokyo 1138656, Japan

[5] KEK, Ctr Res Comp, Tsukuba, Ibaraki 3050801, Japan

[6] Nagoya Univ, Grad Sch Informat Sci, Nagoya, Aichi 4648601, Japan

[7] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 03期

关键词：

traffic flow; detrended fluctuation analysis; power-law;

D O I：

10.1143/JPSJ.75.034002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The temporal behavior of expressway traffic flow is a complex mixture of various time scales. The fundamental response time of drivers is on the order of 1 s, and the periodic appearances of traffic congestion reflect Our social activities. We need some filters to extract proper dynamical fluctuations from raw observed traffic data. We employ the detrended fluctuation analysis (DFA) for studying long-range correlation in the time sequence of traffic flow. The time series of expressway traffic flow is understood to consist of periodic trends with power-law fluctuation. The power spectrum P(k) behaves as P(k) similar to k(-beta) with beta similar to 1. The power-law fluctuation is observed in the wide time range from minutes to months.

引用

页数：5

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