随着社会经济的发展,近几年在我国举办的大型活动已达近万场次,特别是奥运会、世博会等大型活动即将在我国举办,迫切需要在我国建立针对重大活动和重要目标的科学安全风险评估理论和健全的风险评估机制。国内一些大城市针对社会大型活动的组织,虽然制定了管理法规和风险处置预案,但由于公共安全方面的 With the development of society and economy, the number of large-scale events held in our country has reached nearly 10,000 times in recent years. In particular, large-scale activities such as the Olympic Games and the World Expo are about to be held in our country. There is an urgent need to establish a scientific security risk in our country for major activities and important goals Assessment theory and a sound risk assessment mechanism. Some large cities in China for large-scale social organizations, although the formulation of management regulations and risk disposal plan, but due to public safety