To solve the practical problems of urban safety by theory of safety science , and discuss the realization of urban safety as a complex system with safety system idea , the connotation of safety system idea and its application were studied based on the principle of safety "ternary fractal dual system"theory.The key technologies and thoughts to realize urban safe-ty development , being the dynamic safety of complex system , with safety system idea were put forward based on the connota-tion of safety system idea through the methods of analysis , induction and summary .The basic steps for construction of safety development city were presented combined with the specific characteristics of urban safety .The results showed that it is feasi-ble to realize the dynamic safety of complex system with safety system idea , and guide the urban safety development .%为了利用安全科学理论解决城市安全中的现实问题,探讨用安全系统思想实现城市安全这一复杂系统动态安全,基于安全"三元分形双系统"原理,开展了安全系统思想内涵及其应用研究.基于安全系统思想内涵,通过分析归纳、总结概括的方法,提出了用安全系统思想实现城市安全发展这种复杂系统动态安全的关键技术和思路.并结合城市安全的具体特点,提出了安全发展城市建设的基本步骤.结果显示,用安全系统思想实现复杂系统动态安全,指导城市安全发展是可行的.
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