Crowd Gather Alert Classification in Public Spaces Based on Catastrophe Theory
Xiaojun Liu · Zhongguo anquan kexue xuebao · 2010
With the assembly affairs occurring in clusters from 2005 to 2008 as the typical event samples,an indicator system including saturation of public buildings,crowd sentiment indicators,construction management indicators,hidden hazards and other factors,is established.Cusp mutation model and butterfly mutation model are used to analyze and evaluate mutation series,and the general scope of classification mutation series is obtained.A judgment of early warning level is demonstrated by using a cluster event occurring in public places as an example.The example shows that catastrophe theory model can provide early alert information of public places for managers in decision-making of crowd safety control.