TY - JOUR
T1 - The influence of random slowdown process and lock-step effect on the fundamental diagram of the nonlinear pedestrian dynamics
T2 - An estimating-correction cellular automaton
AU - Fu, Zhijian
AU - Zhou, Xiaodong
AU - Chen, Yanqiu
AU - Gong, Junhui
AU - Peng, Fei
AU - Yan, Zidan
AU - Zhang, Taolin
AU - Yang, Lizhong
N1 - Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - Random slowdown process and lock-step effect, observed from real-life observation and the experiments of other researchers, were investigated in the view of the pedestrian microscopic behaviors. Due to the limited controllability, repeatability and randomness of the pedestrian experiments, a new estimating-correction cellular automaton was established to research the influence of random slowdown process and lock-step effect on the fundamental diagram. The first step of the model is to estimate the next time-step status of the neighbor cell in front of the tracked pedestrian. The second step is to correct the status and confirm the position of the tracked pedestrian in the next time-step. It is found that the random slowdown process and lock-step have significant influence on the curve configuration and the characteristic parameters, including the concavity-convexity, the inflection point, the maximum flow rate and the critical density etc. The random slowdown process reduces the utilization of the available space between two adjacent pedestrians in the longitudinal direction, especially in the region of intermediate density. However, the lock-step effect enhances the utilization of the available space, especially in the region of high density.
AB - Random slowdown process and lock-step effect, observed from real-life observation and the experiments of other researchers, were investigated in the view of the pedestrian microscopic behaviors. Due to the limited controllability, repeatability and randomness of the pedestrian experiments, a new estimating-correction cellular automaton was established to research the influence of random slowdown process and lock-step effect on the fundamental diagram. The first step of the model is to estimate the next time-step status of the neighbor cell in front of the tracked pedestrian. The second step is to correct the status and confirm the position of the tracked pedestrian in the next time-step. It is found that the random slowdown process and lock-step have significant influence on the curve configuration and the characteristic parameters, including the concavity-convexity, the inflection point, the maximum flow rate and the critical density etc. The random slowdown process reduces the utilization of the available space between two adjacent pedestrians in the longitudinal direction, especially in the region of intermediate density. However, the lock-step effect enhances the utilization of the available space, especially in the region of high density.
KW - Estimating-correction cellular automata
KW - Lock-step effect
KW - Microscopic behavior
KW - Pedestrian dynamics
KW - Random slowdown
UR - http://www.scopus.com/inward/record.url?scp=84908617078&partnerID=8YFLogxK
U2 - 10.1016/j.cnsns.2014.06.034
DO - 10.1016/j.cnsns.2014.06.034
M3 - 文章
AN - SCOPUS:84908617078
SN - 1007-5704
VL - 20
SP - 832
EP - 845
JO - Communications in Nonlinear Science and Numerical Simulation
JF - Communications in Nonlinear Science and Numerical Simulation
IS - 3
ER -