进入二十一世纪,城市公共安全形势日趋严峻。经济合作与发展组织(OECD)曾向全世界发出警告:“城市新兴系统风险的出现,水、电、气、卫生、服务、运输、能源、食品、信息和电讯产业领域的要害系统容易遭受单一或一连串灾难性事件严重破坏,从而导致整个系统的瘫痪。” Enter the 21st century, the urban public security situation is becoming more and more serious. The Organization for Economic Cooperation and Development (OECD) has warned the world: “The emergence of emerging systemic risks in the cities makes the key systems in the water, electricity, gas, sanitation, service, transport, energy, food, information and telecommunications industries vulnerable to single or A series of catastrophic events seriously damaged, resulting in the paralysis of the entire system. ”