This paper introduces the method of air defence artillery group firing command ability based on the LMBP arithmetic.

介绍了一种基于BP神经网络的防空兵群射击指挥能力综合评估方法。

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Based on the practice, it introduces the methods and procedures of applying the electro-survey to surveying the stale civil air defence tunnels.

结合具体工程实例，介绍了以“电法勘探”探测陈旧人防工程地道的方法及过程。

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The paper describes a kind of method used for evaluating quantitatively ECCM capability of air-defence surveillance radar, based on analyzing some methods in this field.

在分析实现雷达抗干扰性能几种评估方法的基础上，介绍了一种定量评估雷达抗干扰性能的方法。

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The Ministry of Defence has stressed that the government has not yet decided to deploy ground-based air defence systems during the Games.

BBC: London 2012: Major Olympic security test unveiled

Britain, France and Italy, having recently decided, after years of dithering, not to build a frigate together, still hope to produce a joint sea-based air-defence system which would have some capacity against missiles.

ECONOMIST: Rockets overhead