A strategic model for state compliance verification

The theory of directed graphs and noncooperative games is applied to the problem of verification of State compliance to international treaties on arms control, disarmament and nonproliferation of weapons of mass destruction. Hypothetical treaty violations are formulated in terms of illegal acquisition paths for the accumulation of clandestine weapons, weapons‐grade materials or some other military capability. The paths constitute the illegal strategies of a sovereign State in a two‐person inspection game played against a multi‐ or international Inspectorate charged with compliance verification. The effectiveness of existing or postulated verification measures is quantified in terms of the Inspectorate's expected utility at Nash equilibrium. A prototype software implementation of the methodology and a case study are presented. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 260–271, 2016     

Generalizing the survival signature to unrepairable homogeneous multi‐state systems

The notion of signature has been widely applied for the reliability evaluation of technical systems that consist of binary components. Multi‐state system modeling is also widely used for representing real life engineering systems whose components can have different performance levels. In this article, the concept of survival signature is generalized to a certain class of unrepairable homogeneous multi‐state systems with multi‐state components. With such a generalization, a representation for the survival function of the time spent by a system in a specific state or above is obtained. The findings of the article are illustrated for multi‐state consecutive‐k‐out‐of‐n system which perform its task at three different performance levels. The generalization of the concept of survival signature to a multi‐state system with multiple types of components is also presented. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 593–599, 2017     

弹药木质包装抗冲击振动防护性能的测试研究

各种形式的冲击和振动构成了弹药储运的动态力学环境,它是造成包装破损、弹药零部件损坏和其他质量问题的主因。通过设计实施部分模拟试验并分析冲击和振动响应输出,测试研究了现役木质弹药包装在内置缓冲材料前后的抗冲击振动性能。     

柴油机缸盖振动信号关联维数的影响因素分析

柴油机缸盖振动信号的关联维数是柴油机健康状况评估的重要参数。在实际工程应用中,关联维数的计算面临着重复性差的问题,通过分析振动信号的截取方法、信号成分以及工况等因素对关联维数计算的影响,较好地解决了关联维数计算重复性差的问题。     

通用装备机械液压系统综合检测试验平台的设计与研制

针对目前通用装备保障建设过程中存在的保障设备通用性差、综合功能弱、机动性能差及信息化程度低等问题,提出了"划类分组、综合集成、一体通用"的设计思想,研制了可完成军械、装甲、工程、防化、车辆、陆军船艇等装备机械液压系统技术状况检测与评估、故障诊断、部(元)件修后试验与质量评估、信息管理等功能的综合机动平台。重点阐述了平台各系统的设计思想、硬件组成及软件框架。实际应用表明,该平台具有"广谱"、"广域"和"全时"的能力,其推广使用将为通用装备保障由"基于型号"向"基于能力"的建设转型提供成功示范。     

非线性Duffing方程自由振动频率解分析

应用Gauss-Chebyshev求积公式求解了Duffing方程的自由振动频率,得到了高精度近似计算公式。对Duffing方程精确椭圆积分频率解进行了数值计算,以此结果为基准,通过绘制多种典型方法得到的Duf-fing方程自由振动频率解的频率-振幅曲线,定性分析了各公式的精度。以Duffing方程特征振幅为基准,定量分析了各公式的计算值及其相对误差,指出基于Gauss-Chebyshev求积公式的Duffing方程自由振动频率解表达式具有形式简洁、精度高的优点,其优势在大振幅情况下以及软弹簧系统中更为明显。最后指出,现有的频率解在计算精度方面存在一定的差异,有的适合软弹簧系统,有的适合硬弹簧系统,应注意区分它们的适用范围,而应用Gauss-Chebyshev求积公式得到的结果则具有普适性。     

Lipschitz非线性系统状态观测器设计新方法

针对Lipschitz非线性系统状态观测器,提出了一种以极小化条件数为目标准则的新的设计方法。运用梯度下降法和Slyvester方程,计算极小化条件数,优化增益矩阵和最大允许Lipschitz常数,完成观测器设计。通过同其它文献的算例比较,结果发现按文中方法设计的观测器具有迭代次数少、优化结果好的特点。     

齿轮混沌动力学特性试验研究

设计了齿轮混沌动力学特性试验台架,应用非线性时间序列分析方法对采集的数据进行了分析,提取了信号的特征指数.试验表明,齿轮处于混沌振动状态.在有润滑的情况下,混沌振动信号的吸引子结构比干摩擦情况的吸引子更加复杂.     

预警探测体系作战效能评估框架

首先阐述了预警探测体系及其效能评估的概念,根据预警探测体系及其作战任务的特点,建立了效能评价指标体系,并给出了部分效能指标的评估计算模型,最后提出了预警探测体系作战效能评估的框架和一般过程.     

Optimal capacity in a coordinated supply chain

We consider a supply chain in which a retailer faces a stochastic demand, incurs backorder and inventory holding costs and uses a periodic review system to place orders from a manufacturer. The manufacturer must fill the entire order. The manufacturer incurs costs of overtime and undertime if the order deviates from the planned production capacity. We determine the optimal capacity for the manufacturer in case there is no coordination with the retailer as well as in case there is full coordination with the retailer. When there is no coordination the optimal capacity for the manufacturer is found by solving a newsvendor problem. When there is coordination, we present a dynamic programming formulation and establish that the optimal ordering policy for the retailer is characterized by two parameters. The optimal coordinated capacity for the manufacturer can then be obtained by solving a nonlinear programming problem. We present an efficient exact algorithm and a heuristic algorithm for computing the manufacturer's capacity. We discuss the impact of coordination on the supply chain cost as well as on the manufacturer's capacity. We also identify the situations in which coordination is most beneficial. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008