T-junction crowd evacuation stability prediction method and prediction device

A technology of stability prediction and T-junction, applied in prediction, data processing application, calculation, etc., can solve the problem that the results are not universal, the theory is difficult to generalize accurately, and it is difficult to meet the random crowd evacuation open-loop control mode, etc. problem to improve accuracy

Active Publication Date: 2019-10-01
TONGJI UNIV
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Problems solved by technology

1) Case verification analysis, by restoring the event itself, to analyze the characteristics of crowd evacuation in a specific scene, this method is limited by the non-reproducibility of the case scene, the results obtained are not universal, and the theory is difficult to accurately generalize and apply; 2 ) feedback control strategy and controller design method require that the crowd evacuation system has a complete information collection and feedback mechanism, which is difficult to meet the needs of random crowd evacuation open-loop control mode
At present, there is still a lack of a stability analysis technique that can quantify the evolution of crowd evacuation stability for T-shaped intersections

Method used

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  • T-junction crowd evacuation stability prediction method and prediction device
  • T-junction crowd evacuation stability prediction method and prediction device
  • T-junction crowd evacuation stability prediction method and prediction device

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Embodiment 1

[0042] Such as figure 1 As shown, the present invention provides a method for predicting crowd evacuation stability at a T-shaped intersection, comprising the following steps:

[0043] Construct a macro model for the evacuation of panicked crowds at T-junctions;

[0044] Based on the Lyapunov stability and the macroscopic model, the eigenvalues ​​of the equilibrium state of crowd evacuation are obtained;

[0045] Adding disturbance information, obtaining a critical range of acceleration in the horizontal direction and a critical range of acceleration in the vertical direction according to the characteristic value and the disturbance information, and then obtaining the critical acceleration value of the group;

[0046] Crowd evacuation stability is obtained by predicting the relationship between the acceleration critical value and the current acceleration of the crowd.

[0047] The key technologies of the above prediction methods are specifically described as follows.

[004...

Embodiment 2

[0179] This embodiment provides a stability prediction device for crowd evacuation at a T-shaped intersection, including a macro model building module, a feature value acquisition module, a critical value acquisition module, and a stability determination module, wherein the macro model building module is used to construct a panic crowd evacuation at a T-shaped intersection Macroscopic model: The eigenvalue acquisition module obtains the eigenvalue of the crowd evacuation equilibrium state based on the Lyapunov stability and the macroscopic model; the critical value acquisition module is used to add disturbance information, and obtains the acceleration critical value according to the eigenvalue and disturbance information; The stability determination module is used to predict and obtain the crowd evacuation stability according to the relationship between the acceleration critical value and the current acceleration of the crowd. The prediction process of the prediction device is ...

Embodiment 3

[0181] This embodiment provides a device for predicting crowd evacuation stability at a T-shaped intersection, which includes a memory and a processor, the memory stores a computer program, and the processor invokes the computer program to execute the steps of the method described in Embodiment 1.

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Abstract

The invention relates to a T-junction crowd evacuation stability prediction method and prediction device. The T-junction crowd evacuation stability prediction method comprises the following steps: constructing a panic crowd evacuation macroscopic model of a T-junction; based on the Lyapunov stability and the macroscopic model, obtaining a feature value of the crowd evacuation balance state; addingdisturbance information, and obtaining an acceleration critical value according to the characteristic value and the disturbance information; and predicting the crowd evacuation stability according tothe relationship between the acceleration critical value and the current acceleration of the crowd. Compared with the prior art, the method has the advantages of high accuracy and reliability and thelike.

Description

technical field [0001] The invention relates to the technical field of crowd evacuation, in particular to a method and device for predicting crowd evacuation stability at a T-shaped intersection. Background technique [0002] The stability determination of crowd evacuation is a complicated scientific and technical problem. Stability refers to the performance of whether the system can return to the original equilibrium state with a certain accuracy after self-adjustment when the disturbance disappears after the system is disturbed and deviates from the equilibrium state. It is very important to study the stability of crowd evacuation to judge the evolution of crowd evacuation state and to prevent crowding and stampede in time. In recent years, scholars at home and abroad have studied the stability of crowd evacuation and proposed different research methods. The research on the stability of crowd evacuation mainly includes three methods: case verification analysis, feedback ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04
CPCG06Q10/04Y02A10/40
Inventor 赵荣泳李翠玲刘琼胡钱珊董大亨马云龙
Owner TONGJI UNIV
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