Based on the general analysis of evaluation methods both at home and abroad, the gray evaluation method of urban road traffic safety is established.
在综合分析国内外道路交通安全评价方法的基础上，建立了城市道路交通安全的灰色评价方法。
FTA is one of the most important analysis methods in safety system engineering.
FTA是安全系统工程中的重要分析方法之一。
Most of the current methods for safety analysis belong to the scope of safety pre-analyzing, which analyzes the system safety before system being in service.
当前的安全性分析方法大都属于预先安全性分析方法，即在系统使用前对系统进行安全性分析。
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