Abstract
In order to effectively assess all types of security risks in the important event, the important decision-making basis for security risk warning and emergency management of important event is provided by analyzing the coupling relationship and evolution mechanism between various risks. The criminal causes, management defects, security and emergency system construction are analyzed from the possibility of accidents and risks. The multi-source data risk assessment system based on five subsystems and its index set of human factors, management factors, site factors, event factors and audit factors are proposed. The weight of each index in the assessment system is determined by the method of information entropy, and then the risk grade of important event is determined according to the weight calculation function and the improved fuzzy matter element model. The verification with an example shows that: the risk assessment model is optimized by combining entropy weight with fuzzy matter-element model, the influence of weight data extreme value was weakened, the qualitative description and quantitative analysis of multi-source data could be combined, and the subjective error was reduced. The risk grade of important event is reasonably evaluated, and the assessment effect is basically consistent with the expert inspection analysis, which shows that the method had certain application value.
Highlights
In order to effectively assess all types of security risks in the important event, the important decision-making basis for security risk warning and emergency management of important event is provided by analyzing the coupling relationship and evolution mechanism between various risks
The many methods are used in security risk assessment at present, which mainly focused on using various mathematical models to analyze
The weighted quantitative analysis depends on the professional knowledge level of the evaluator, and the judgment matrix standard is revised with strong subjectivity and lack of scientific theory and method[11–13]
Summary
In order to effectively assess all types of security risks in the important event, the important decision-making basis for security risk warning and emergency management of important event is provided by analyzing the coupling relationship and evolution mechanism between various risks. The dynamic model of public security risk assessment for important event is established by using entropy weight and fuzzy matter element model based on the relevant national standards, expert experience and field assessment. This paper summarize the influencing factors into five aspects: human, management, site equipment, events, related audit, and established four levels of assessment index system based on the possibility of security risk, security management defects and the construction of emergency security disposal system.
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