Analyses of the Model Design of Urban Emergency Management System

In order to tackle the insufficiency of policies of urban crisis management and conform to the ability to deal with urban crisis, it asks to establish a comprehensive emergency management system. Under this circumstance, this paper puts forward a general framework of urban crisis, analyzing the corresponding key technologies of the system and founding a risk rating evaluation model of urban natural calamities based on the improvement of projection pursuit so as to offer scientific basis to the effective establishment and application of the evaluation system and the enhancement of the abilities to urban disaster emergency.