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The blockage probability and the blockage time are two important indexes for assessing the blockage efficiency of cluster munitions against the runway. The improved region-by-region searching method and the random sampling method are proposed to calculate the blockage time by considering the minimum number of craters which need to be re- paired after attack. A minimum leave window (MLW) with the minimum number of craters is found out as a region to be repaired, the blockage probability and the blockage time are calculated by the two methods in which the impact points of the sub-munitions are generated with Monte-Carlo simulation technique. An example is given to show the reasonableness of the two methods under the conditions of adequacy simulating times and enough sampling times, and how to choose the methods in application. 相似文献
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基于信息散度的补充样本加权融合评估 总被引:2,自引:0,他引:2
小子样试验评估时,为避免大量先验信息湮没实际飞行试验的信息,融合先验补充样本时通常会根据工程经验对补充样本量作一定限制,对补充样本量的选取并没有量化的理论准则。分析了先验分布与实际试验样本服从分布的差异,通过分布差异进行信息散度计算,用信息散度确定先验样本权重。提出了考虑先验信息可信度的加权方法,以进行Bayes估计。最后提供了正态逆Gama分布参数的加权Bayes估计方法。理论分析和仿真说明,本文的加权方法是合理的。 相似文献
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封锁时间和封锁概率是评估子母弹对机场跑道封锁效果的2个重要指标。本文重点针对封锁时间的计算,考虑机场遭打击后修复最少数量坑的模型,提出了区域搜索法和随机抽样法2种方法。这2种方法均采用Monte- Carlo仿真技术,在通过数值仿真法生成子弹落点的前提下,搜索出受最少子弹影响的紧急维修区域,从而计算了封锁时间和封锁概率。最后还给出了计算实例,说明了在合适的仿真次数和抽样次数保证下2种方法的合理性,以及在应用中如何选择这2种方法。 相似文献
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