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飞行器易损性指标计算的基本理论与方法(Ⅱ) 总被引:4,自引:0,他引:4
文章是飞行器易损性指标计算基本理论的第二部分。在第一部分给出的单次击中易损性指标计算公式的基础上, 研究了多次击中情况下飞行器易损性指标计算的两种方法, 并给出了相应的计算公式。最终通过具体的算例说明了方法的有效性 相似文献
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飞行器易损性指标计算的基本理论与方法(Ⅰ) 总被引:2,自引:0,他引:2
给出了与易损性指标计算有关的一些基本概念,推导了在单击中情况下无余度非重叠模型、无余度重叠模型、余度非重叠模型、余度重叠模型4个模型及其相应的易损性指标计算公式。若干算例说明了方法的有效性。 相似文献
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Belgin San Akca 《战略研究杂志》2013,36(4):589-613
States have suffered equally, if not more, from violence generated by Non-state Armed Groups (NAGs), such as ethnic and religious insurgencies and terrorists, than violence directly generated by their counterparts. This does not undermine the fact that states occasionally provide support to these groups in the form of safe havens, weapons, and funding. This paper argues that state support is a function of the states’ vulnerability in extracting and mobilizing resources to secure their borders. In contrast to the conception that weak or failed states provide the largest pool of resources to NAGs, the relatively strong states still prevail as their most fervent supporters. The preliminary evidence also suggests that NAGs serve as substitutes for allies. 相似文献
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Vulnerability assessment to projectiles: Approach definition and application to helicopter platforms
《防务技术》2022,18(9):1523-1537
Survivability is defined as the capability of a platform to avoid or withstand a man-made hostile environment. Military aircraft in particular, but also other kinds of platforms subjected to external, impacting threats, are commonly designed according to increasing survivability requirements. The concept of survivability was first formalized by R. Ball in 1985 in its seminal work on combat aircraft survivability. On the basis of the theory presented in his work, many computer programs have been developed which implement the modelling techniques and computations required by vulnerability assessments. However, a clear and general view of the operative computational procedures is still lacking. Moreover, to date only a limited number of applications to helicopter platforms have been investigated in the survivability field, even though these platforms experience numerous flight conditions exposing the system to different types of threats. In this context, this work aims at establishing a multi-purpose general framework for the vulnerability assessment of different types of platforms subjected to external threats, with a focus on helicopters. The in-house software specifically developed for this application is here described in detail and employed to present a case study on a representative military helicopter. 相似文献
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