scholarly journals Analysis of the Evacuation Capacity of Parallel Double Running Stairs in Different Merging Form Based on Simulation

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Xia-zhong Zheng ◽  
Xue-ling Xie ◽  
Dan Tian ◽  
Jian-lan Zhou ◽  
Ming Zhang
Keyword(s):  
Computer Simulation ◽  
Evaluation Model ◽  
Pedestrian Flow ◽  
Agent Based Model ◽  
Evacuation Time ◽  
Agent Based ◽  
Positive Correlation ◽  
Model Based ◽  
Evacuation Model ◽  
Merging Behavior

In order to analyze the evacuation capacity of parallel double running stairs, a dozen stairs merging forms are set by investigation and statistics, and the improved agent-based evacuation model that considers the merging behavior is used to simulate the process of merging and evacuation in the stairs. The stairs evacuation capacity is related to the evacuation time and the robustness of stairs, and the evacuation time can be calculated by using the improved agent-based model based on computer simulation. The robustness of each merging form can be obtained according to the fluctuation degree of evacuation time under the different pedestrian flow. The evaluation model of stairs evacuation capacity is established by fusing the evacuation time and the robustness of stairs. Combined with the specific example to calculate the evacuation capacity of each stairs form, it is found that every merging form has different evacuation time and different robustness, and the evacuation time has not positive correlation with the robustness for the same form stairs. Meanwhile, the evacuation capacity of stairs is not related to the number of the floor entrances. Finally, the results show that the evacuation capacity of stairs is optimal when the floor entrances are close to out stairs in parallel double running stairs and suitable to the case where pedestrian flow and the change of pedestrian flow are large.

scholarly journals Investigating the Exits’ Symmetry Impact on the Evacuation Process of Classrooms and Lecture Halls: An Agent-Based Modeling Approach

Symmetry ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 627 ◽  
Author(s):  
Camelia Delcea ◽  
Liviu-Adrian Cotfas ◽  
Ioana-Alexandra Bradea ◽  
Marcel-Ioan Boloș ◽  
Gabriella Ferruzzi
Keyword(s):  
Agent Based Modeling ◽  
Agent Based Model ◽  
Evacuation Time ◽  
High Importance ◽  
Agent Based ◽  
Modeling Approach ◽  
Size Number ◽  
The Doors

As the evacuation problem has attracted and continues to attract a series of researchers due to its high importance both for saving human lives and for reducing the material losses in such situations, the present paper analyses whether the evacuation doors configuration in the case of classrooms and lecture halls matters in reducing the evacuation time. For this aim, eighteen possible doors configurations have been considered along with five possible placements of desks and chairs. The doors configurations have been divided into symmetrical and asymmetrical clusters based on the two doors positions within the room. An agent-based model has been created in NetLogo which allows a fast configuration of the classrooms and lecture halls in terms of size, number of desks and chairs, desks and chair configuration, exits’ size, the presence of fallen objects, type of evacuees and their speed. The model has been used for performing and analyzing various scenarios. Based on these results, it has been observed that, in most cases, the symmetrical doors configurations provide good/optimal results, while only some of the asymmetrical doors configurations provide comparable/better results. The model is configurable and can be used in various scenarios.

scholarly journals Identifying Model-Based and Model-Free Patterns in Behavior on Multi-Step Tasks

2016 ◽  
Author(s):  
Kevin J. Miller ◽  
Carlos D. Brody ◽  
Matthew M. Botvinick
Keyword(s):  
Model Fitting ◽  
Decision Task ◽  
Sequential Decision ◽  
Agent Based Model ◽  
Agent Based ◽  
Model Based ◽  
Model Free ◽  
Analysis Technique ◽  
Analyze Data

Recent years have seen a surge of research into the neuroscience of planning. Much of this work has taken advantage of a two-step sequential decision task developed by Daw et al. (2011), which gives the ability to diagnose whether or not subjects’ behavior is the result of planning. Here, we present simulations which suggest that the techniques most commonly used to analyze data from this task may be confounded in important ways. We introduce a new analysis technique, which suffers from fewer of these issues. This technique also presents a richer view of behavior, making it useful for characterizing patterns in behavior in a theory-neutral manner. This allows it to provide an important check on the assumptions of more theory-driven analysis such as agent-based model-fitting.

Developing an evacuation evaluation model for offshore oil and gas platforms using BIM and agent-based model

2018 ◽  
Vol 89 ◽  
pp. 214-224 ◽  
Author(s):  
Jack C.P. Cheng ◽  
Yi Tan ◽  
Yongze Song ◽  
Zhongya Mei ◽  
Vincent J.L. Gan ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Evaluation Model ◽  
Agent Based Model ◽  
Agent Based ◽  
Offshore Oil And Gas ◽  
Offshore Oil

scholarly journals A Stairs Evacuation Model Considering the Pedestrian Merging Flows

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Xia Zhong Zheng ◽  
Dan Tian ◽  
Ming Zhang ◽  
Chaoran Hu ◽  
Liyang Tong
Keyword(s):  
Pedestrian Flow ◽  
Output Rate ◽  
Evacuation Time ◽  
Building Evacuation ◽  
Complex Interactions ◽  
Proposed Model ◽  
Three Stages ◽  
Evacuation Model ◽  
The Impact

Pedestrian merging flows are common in a stairs evacuation process, which involves complex interactions among pedestrians that substantially restrict the efficiency of the stairs evacuation process. Analyzing the pedestrian merging flows process and improving the efficiency of stairs evacuation are urgent and essential tasks. A novel simplified stairs evacuation model for simulating and analyzing the stairs evacuation process, which considers the impact of merging flows, is proposed in this process. The dynamic pedestrian output rate of a floor platform is calculated by the number of pedestrians on the floor platform. The merging ratio determined by the design size of stairs is adopted to determine the ratio between the stairs pedestrian flow and the floor pedestrian flow in the pedestrian output rate of the floor platform. To evaluate the stairs evacuation process is divided into three stages based on the pedestrian merging flows process, and the evacuation time at each stage is computed by the dynamic pedestrian output rate of the floor platform. The stairs evacuation capacity is calculated by the evacuation time and the number of pedestrians. A case study of a six-floor building evacuation is investigated, and the reliability and feasibility of the proposed model is verified. By establishing different merging ratios, the optimal merging ratio is obtained by comparing the evacuation capacities of different merging ratios, which provides a reference of stairs design for designers.

scholarly journals Centurions in the Roman Legion: Computer Simulation and Complex Systems

2015 ◽  
Vol 46 (2) ◽  
pp. 245-263 ◽  
Author(s):  
Xavier Rubio-Campillo ◽  
Pau Valdés Matías ◽  
Eduard Ble
Keyword(s):  
Computer Simulation ◽  
Complex Systems ◽  
Multiple Roles ◽  
Agent Based Model ◽  
First Line ◽  
Historical Sources ◽  
Agent Based ◽  
Formal Framework ◽  
Computer Simulation Technique

The role of centurions in Roman warfare has never been decisively established. Historical sources suggest that centurions exerted an influence on the performance of the Roman battle line that was highly disproportionate to their numbers, as well as to their particular actions. However, the lack of a formal framework of Roman tactics does not allow this proposition to be tested. The results obtained from an agent-based model (abm) of Roman warfare, a computer-simulation technique, however, suggest that battle formations benefited greatly from the presence of even a small percentage of psychologically resilient soldiers, especially along the first line, even if these individuals displayed no more than average levels of skill and aggression. Hence, the model’s simulated patterns of Roman warfare indicate that the multiple roles performed by the centurions as described in the sources were not distinguished so much by tactics as by experience and imperviousness to the stress of combat.

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