The hierarchy of an aerial attack target menace evaluation model in air defense system is established using the hierachy analysis method, and the cost weighting coefficient is obtained.

首先运用层次分析法建立了防空系统对空袭目标价值评估模型的层次结构，并获得空袭目标的价值权重系数。

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At the time, the Libyans claimed that it was so strong, so deep underground, it could withstand an aerial attack, a bombing attack.

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But even in Libya, which had a front-line and a terrain more vulnerable to aerial attack, bombing took a long time to weaken Qaddafi's forces.

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These, he said, could avoid aerial detection and attack.

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