共查询到19条相似文献,搜索用时 78 毫秒
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针对无人机光电侦察设备故障类型多样性以及故障信息不确定性等问题,从信息融合的角度出发,运用证据理论对光电侦察设备故障进行诊断.依据故障统计数据和专家评判矩阵获取基本概率分配,利用证据可信度修正最初的概率分配,再利用证据融合公式得到综合故障诊断结果.最后通过实例验证了该方法的可行性. 相似文献
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针对典型的舰船机械设备系统,运用故障树分析等现代可靠性理论分析方法,结合系统设备的技术性能分析、非电产品的结构和故障特点以及运行管理实际情况,研究系统设备、部件的故障机理,故障模式和故障影响效应,明确导致设备、部件故障的原因及发生模式。应用FTAS故障树分析软件包对其进行了定性、定量分析,获得了以概率结构事件、最小割集等形式表达的系统设备、部件故障对系统故障的作用模式,并对系统故障概率随时间的变化进行了拟合检验及评价了系统可靠性,为确定在指定远航任务期(90天)内所需的备品备件决策提供依据。 相似文献
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在单故障假设条件下,考虑了传感器的失效概率和设备的故障率,提出一种以故障检测率和故障隔离率为约束条件的降低传感器费用和失效概率的混合整数非线性规划(MINLP)模型,从而为机电产品测试性设计中传感器选择问题提供了一种可行和有效的解决方法,并进行了案例验证,说明了该方法的有效性。 相似文献
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简要介绍了某型无人机维修级别分析中的组合方案法 ,针对传统分析法中设备占用率采用经验值 ,造成可信度低的问题 ,提出了一种基于不同故障模式发生时的条件概率求解设备占用率的算法 ,并给出了这种算法的适用范围。 相似文献
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对捷联惯性制导系统弹载计算机四元数计算的舍入误差进行了概率估计。首先建立定点计算机上四元数计算舍入误差的概率模型,然后利用该模型得到舍入误差的分布函数,进行舍入误差的概率分析。 相似文献
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R. T. Robinson 《海军后勤学研究》1981,28(4):653-663
This paper presents a mathematical model that yields the area drained by a naturally-occurring network of streams. The model is based on empirically derived relationships in the field of quantitative geomorphology and an assumption concerning the probabilistic nature of stream system formation. A wide range of model solutions is indicated, and the model is validated by comparing the results to statistics from actual stream systems. 相似文献
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The concept of maximum entropy has been applied to specify the probabilistic model of consumer purchase behavior. This article is concerned with the marketing structure analysis based on entropy model when a new brand has pushed into the existing two-brand market. A comparison between the proposed model and the initial three-brand model is attempted based on their marketing structures. An optimal price decision maximizing the sales is also discussed. 相似文献
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In this article, we consider an online retailer who sells two similar products (A and B) over a finite selling period. Any stock left at the end of the period has no value (like clothes going out of fashion at the end of a season). Aside from selling the products at regular prices, he may offer an additional option that sells a probabilistic good, “A or B,” at a discounted price. Whenever a customer buys a probabilistic good, he needs to assign one of the products for the fulfillment. Considering the choice behavior of potential customers, we model the problem using continuous‐time, discrete‐state, finite‐horizon dynamic programming. We study the optimal admission decisions and devise two scenarios, whose value functions can be used as benchmarks to evaluate the demand induction effect and demand dilution effect of probabilistic selling (PS). We further investigate an extension of the base MDP (Markov Decision Process) model in which the fulfillment of probabilistic sales is uncontrollable by the retailer. A special case of the extended model can be used as a benchmark to quantify the potential inventory pooling effect of PS. Finally, numerical experiments are conducted to evaluate the overall profit improvement, and the effects from adopting the PS strategy. © 2014 Wiley Periodicals, Inc. Naval Research Logistics, 61: 604–620, 2014 相似文献
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从作战效率的角度,建立多层防御系统的概率模型,分析单层防御系统性能变化对整体的影响;建立目标毁伤概率模型,分析单个目标命中概率对单层防御系统性能的影响;建立单层防御系统的贝努利实验模型,分析识别能力和毁伤能力对系统效能的影响.通过这些简单的概率模型,反向分析探讨了针对分层防御系统的弹道导弹突防问题. 相似文献
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