The safety pre evaluation is a complex technology economic system engineering and it is complex due to influential factors, on relation variables and constraining conditions.
安全预评价是一个复杂的技术经济系统工程，其影响因素、关联变量和约束条件复杂。
[GUO Xianguang. Appli-cation of improved entropy method in evaluation of economic res ult[J]. System Engineering Theory&Practice, 1998, (12):98~102. ].
[10]郭显光。改进的熵值法及其在经济效益评价中的应用[J]。系统工程理论与实践，1998，（12）：98~102。
Based on that, from the engineering control measures and non-engineering measures to study the protection engineering, and thus establish the economic evaluation of prevention methods and models.
在此基础上，提出了防治公路滑坡的工程措施及非工程措施，并建立了防治工程经济效益评价模型。
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