Optimization method and system for obstacle geometric shapes in crowd evacuation simulation process

A technology of geometric shapes and optimization methods, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems affecting pedestrian evacuation efficiency, achieve the effect of adjusting speed and effect, and enhancing evacuation performance

Inactive Publication Date: 2018-09-28
SHANDONG NORMAL UNIV
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Problems solved by technology

[0003] In order to improve the pedestrian outflow problem in panic situations, setting appropriate obstacles in front of the exit can effectively improve the evacuation efficiency. In addition, it is found that all geometric parameters of obstacles can significantly affect the pedestrian evacuation efficiency; existing literature has proved that, Placing a barrier in a panic situation does not reduce or absorb the pressure in the exit area, on the contrary, it increases the pressure to a higher level, so the physical mechanism behind the increase in discharge efficiency is not a drop in pressure in the exit area, but through the effective space Separation significantly reduces high-density areas, which ultimately leads to escape velocities and evacuation outflows

Method used

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  • Optimization method and system for obstacle geometric shapes in crowd evacuation simulation process
  • Optimization method and system for obstacle geometric shapes in crowd evacuation simulation process
  • Optimization method and system for obstacle geometric shapes in crowd evacuation simulation process

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[0048] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0049] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0050] In the case of no conflict, the embodiments in the present application and the features in the embodiment...

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Abstract

The invention discloses an optimization method and system for obstacle geometric shapes in a crowd evacuation simulation process. According to the method, an initial crowd is created randomly; an obstacle type is selected, and the size of each obstacle is set; a video of a designated region is acquired, and a KLT tracing algorithm is utilized to extract crowd evacuation simulation data from the video; a social force model is adopted to perform local path planning, motion tracks of all individuals in an evacuation scene are obtained, and crowd evacuation simulation is performed; whether all shape parameters of each type of obstacles are set is judged; whether a termination condition is met is judged, and if yes, the type and sizes of the obstacles are output, the evacuation time of people is set, the evacuation population in the time is set, and the step is ended; and otherwise an improved DE algorithm is utilized to perform variation, intersection and selection, and a new crowd is generated. The obstacles with certain geometric shapes can shorten the leaving time of all pedestrians, and appropriate shapes can effectively increase crowd evacuation speed.

Description

technical field [0001] The invention relates to the field of crowd evacuation computer simulation, in particular to a method and system for optimizing the geometry of obstacles in the crowd evacuation simulation process. Background technique [0002] In recent years, with the rapid development of social economy and the continuous acceleration of urbanization, the number, scope and density of urban population have increased rapidly, and the number of large-scale events represented by large-scale cultural and sports activities, exhibitions, and commercial promotions in large and medium-sized cities in China has increased. , the number of large shopping malls and entertainment venues is also increasing; their common feature is that the number of people gathering is very large. The greater the total flow of people and the higher the crowd density, the greater the possibility of accidents, especially stampede accidents caused by pedestrian congestion. Although the probability of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/26
CPCG06F30/20G06Q50/26
Inventor 刘弘尚亚男段培永
Owner SHANDONG NORMAL UNIV
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