Search

Your search keyword '"Ding, Zhong-Jun"' showing total 36 results
Start Over Author "Ding, Zhong-Jun"
36 results on '"Ding, Zhong-Jun"'

1. Analytical and simulation studies of pedestrian flow at a crossing with random update rule

Author

Ding, Zhong-Jun, Yu, Shao-Long, Zhu, Kongjin, Ding, Jian-Xun, Chen, Bokui, Shi, Qin, Jiang, Rui, and Wang, Bing-Hong

Subjects
Nonlinear Sciences - Cellular Automata and Lattice Gases
Abstract

The intersecting pedestrian flow on the 2D lattice with random update rule is studied. Each pedestrian has three moving directions without the back step. Under periodic boundary conditions, an intermediate phase has been found at which some pedestrians could move along the border of jamming stripes. We have performed mean field analysis for the moving and intermediate phase respectively. The analytical results agree with the simulation results well. The empty site moves along the interface of jamming stripes when the system only has one empty site. The average movement of empty site in one Monte Carlo step (MCS) has been analyzed through the master equation. Under open boundary conditions, the system exhibits moving and jamming phases. The critical injection probability $\alpha_c$ shows nontrivially against the forward moving probability $q$. The analytical results of average velocity, the density and the flow rate against the injection probability in the moving phase also agree with simulation results well., Comment: 11 pages, 15 figures

Published
2017

2. Escaping in couples facilitates evacuation: Experimental study and modeling

Author

Guo, Ning, Jiang, Rui, Hu, Mao-Bin, Ding, Jian-Xun, and Ding, Zhong-Jun

Subjects
Physics - Physics and Society, Nonlinear Sciences - Adaptation and Self-Organizing Systems
Abstract

In this paper, the impact of escaping in couples on the evacuation dynamics has been investigated via experiments and modeling. Two sets of experiments have been implemented, in which pedestrians are asked to escape either in individual or in couples. The experiments show that escaping in couples can decrease the average evacuation time. Moreover, it is found that the average evacuation time gap is essentially constant, which means that the evacuation speed essentially does not depend on the number of pedestrians that have not yet escaped. To model the evacuation dynamics, an improved social force model has been proposed, in which it is assumed that the driving force of a pedestrian cannot be fulfilled when the composition of physical forces exceeds a threshold because the pedestrian cannot keep his/her body balance under this circumstance. To model the effect of escaping in couples, attraction force has been introduced between the partners. Simulation results are in good agreement with the experimental ones.

Published
2015

6. Traffic flow in a Manhattan-like urban system

Author

Li, Ming, Ding, Zhong-Jun, Jiang, Rui, Hu, Mao-Bin, and Wang, Bing-Hong

Subjects
Nonlinear Sciences - Adaptation and Self-Organizing Systems, Physics - Physics and Society
Abstract

In this paper, a cellular automaton model of vehicular traffic in Manhattan-like urban system is proposed. In this model, the origin-destination trips and traffic lights have been considered. The system exhibits three different states, i.e., moving state, saturation state and global deadlock state. With a grid coarsening method, vehicle distribution in the moving state and the saturation state has been studied. Interesting structures (e.g., windmill-like one, T-shirt-like one, Y-like one) have been revealed. A metastability of the system is observed in the transition from saturation state to global deadlock state. The effect of advanced traveller information system (ATIS), the traffic light period, and the traffic light switch strategy have also been investigated., Comment: 8 pages, 7 figures

Published
2011
Full Text
View/download PDF

20. Totally asymmetric simple exclusion processes on two intersected lanes.

Author

Tian, Bo, Jiang, Rui, Hu, Mao-Bin, Ding, Zhong-Jun, and Jia, Bin

Abstract

This paper carries out a cluster mean field analysis for spontaneous symmetry breaking in a two-lane totally asymmetric exclusion processes with an intersection. We find that the boundaries of the asymmetric phase are determined by differences of upstream segment densities and downstream segment flow rates of two lanes. The spontaneous symmetry breaking phenomenon exists when the interaction of particles is strong enough. The critical values, beyond which the phenomenon disappears, are identified through simulation and analysis, and they are in excellent agreement. The analytical results of the asymmetric phase boundaries are closer to simulation ones than those of simple mean field analysis. The analytical results of density profiles and the simulation ones are also in excellent agreement. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results