The Assessment of Modern Community Security Risks in Megacities Based on the Dempster–Shafer Theory

Through the study of community security risks in a megacity by employing the Dempster–Shafer theory, this paper developed an indicator system for the assessment of urban community security based on a combined array of both static and dynamic factors including natural disasters, man-made hazards, community administration and security support. A proper model was thereafter designed. Precluding content inadequacy, insufficient indicators and model inaccuracy and other problems occurred in preceding assessments predicted upon a combination of both static and dynamic factors, these efforts have enabled more effective urban community security assessment through a case study.