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针对航空装备体系构成复杂的特点,将故障树分析引入航空装备体系结构贡献率评估问题,提出基于故障树分析的评估方法.从作战装备、信息支援装备和保障装备三个方面构建航空装备体系结构,建造航空装备体系结构故障树;采用底事件的关键重要度指标来计算航空装备的体系结构贡献率,建立基于关键重要度的航空装备体系结构贡献率评估模型;以某航空... 相似文献
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电子装备随机备件品种和数量计算方法 总被引:5,自引:0,他引:5
分析了对电子装备随机备件品种和数量的影响因素 ,提出了品种和数量的计算方法。 相似文献
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针对作战单元任务期内备件需求随任务阶段动态变化的现实情况,考虑作战单元因携行维修能力有限而导致可修件具有一定报废概率的影响,通过引入报废因子,建立两级保障体制下,故障件具有一定报废概率且不考虑外部补给的作战单元时变可用度评估模型。采用Extend Sim仿真软件进行计算,根据仿真值进行参数拟合得到模型中报废因子的近似解析表达形式。研究表明,报废因子能够适应不同的可靠性维修性参数值,模型具有较强的适应性。该模型有效解决了备件非平衡状态下的装备时变可用度评估问题,可为装备管理人员制定合理的保障方案提供支撑。 相似文献
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装备维修中备件需求率的预计方法 总被引:6,自引:1,他引:5
通过研究装备维修过程中器件的固有可靠性和维修性,着重分析了影响维修器件需求率的主要因素.利用系统建模和仿真的方法,分别针对耗损类型器件和可修复类型器件建立了相应的需求数学模型,最后给出了维修备件需求率的预计方法. 相似文献
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本文针对备件供应决策问题,提出了备件保证度的概念,阐述了保证度与使用可用度的关系,认为影响保证度的主要因素是:备件修复时间、备件获取时间、库存水平、设备数量及复杂程度和备件需求率,分析了二级供应系统的普遍性和代表性,并应用概率论的原理,建立了备件保证度模型。 相似文献
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针对新研装备备件品种确定过程中决策信息“犹豫性”和“模糊性”特点突出、难以运用传统备件品种确定方法进行决策的问题,提出一种基于犹豫模糊粗糙集的备件品种确定方法。利用风险偏好系数对不完备犹豫模糊信息进行数值延拓,为构建不同风险偏好下备件品种确定的犹豫模糊决策信息系统奠定了基础;考虑得分函数和数值延拓边界的综合因素影响给出了改进的包含度计算公式,并基于包含度定义进行了证明;给出了基于改进包含度计算的备件品种决策属性的约简条件和规则获取方法,实现了犹豫模糊决策信息的深度挖掘和有效利用。以某新研装备备件品种确定为例进行了方法验证,研究结果表明:通过该法能够有效处理犹豫模糊决策信息,获取精简实用的备件品种决策规则集,验证了方法的可行性。 相似文献
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Vadim Kolnogorov 《战略研究杂志》2013,36(2):339-359
Few issues were as contentious in the development of the Soviet Navy as the role of aircraft carriers and sea-based aviation. Despite the continued insistence by the highest naval authorities and scientific experts that surface combatants simply could not be protected in the open ocean without the support of ship-borne aviation, Soviet leaders – for a variety of reasons – resisted aircraft carrier development until the final decades of the Cold War. In examining one of the most defining and telling asymmetries of the Cold War at sea, the author argues that while the USSR was economically and technologically capable of building aircraft carriers of any class, bureaucratic infighting, misperceptions of cost and practicality, and the inherent flaws of a totalitarian system ultimately created an impossible gap in capabilities between the two sides. The priorities and direction of Soviet weapons and defense technology development during the Cold War was largely a factor of the military-political situation taking shape at home, and in the world. As a rule, the navy was assigned missions that corresponded to its capabilities at a given point in time, rather than the other way around. Often, the navy lacked the material resources needed to implement its core mission. The availability of these resources, in turn, depended on the country's economic situation, its scientific potential, the technological state of its industry, as well as the subjective influence of political and military leaders on the priorities of technological development. The impact of the country's socioeconomic imperatives was undoubtedly also felt in the sluggish pace of development of ship-borne aviation and aircraft carriers in the USSR. 相似文献