Integrated capacity,demand, and production planning with subcontracting and overtime options

Models for integrated production and demand planning decisions can serve to improve a producer's ability to effectively match demand requirements with production capabilities. In contexts with price‐sensitive demands, economies of scale in production, and multiple capacity options, such integrated planning problems can quickly become complex. To address these complexities, this paper provides profit‐maximizing production planning models for determining optimal demand and internal production capacity levels under price‐sensitive deterministic demands, with subcontracting and overtime options. The models determine a producer's optimal price, production, inventory, subcontracting, overtime, and internal capacity levels, while accounting for production economies of scale and capacity costs through concave cost functions. We use polyhedral properties and dynamic programming techniques to provide polynomial‐time solution approaches for obtaining an optimal solution for this class of problems when the internal capacity level is time‐invariant. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

滑动容错辨识算法在航迹数据处理中的应用

由于试验环境和被测目标运动特性的影响,航迹测量数据中会出现斑点型异值。对最小二乘多项式进行改进,引进自适应调节函数和滑动窗口概念,提出了滑动多项式容错辨识算法,详细描述了采用该方法进行异值辨识和修复的具体过程。仿真分析和实际飞行试验的数据处理表明:该方法对处理含有斑点型异值的测量数据具有良好的效果。     

主动雷达导引头低空多路径效应的数学仿真分析

采用闭环跟踪的方法,分析了不同条件下,多路径对导引头测角所带来的影响。得出了2种减小多路径影响的方法,一是通过导弹弹道的调整来抑制多路径效应;二是采用宽带高距离分辨体制导引头,从距离上区分真实目标和镜像目标。     

激光末制导炮弹过重力补偿比例导引律的分析

以相对运动方程组为基础,分析了导引律的运动学实质和过重力补偿的信号流图,进而分别对比例导引和基于过重力补偿为常值的过重力补偿比例导引下的弹道进行了对比仿真计算。结果表明,过重力补偿比例导引适用于攻击非机动和机动性不大的目标,落角增大,命中点附近视线偏转和控制过载变大,能够实现对目标的大落角攻顶效应。     

军事院校校园空间环境与特色的创造——后勤工程学院新校区概念性规划设计

军事院校担负着培养和造就高素质新型军事人才的使命,军事院校校园空间环境应有自己鲜明的特色.着重介绍了后勤工程学院新校区概念性规划设计方案的主要思想,提出了尊重自然环境条件,创建生态化、园林式的校园环境;尊重地域文化,体现历史传承和军校特色的设计理念.力求创造一个以人为本,能体现当代军事校园精神风貌的场所和空间环境,创建一种可持续发展的校园规划建设模式.     

一种能考虑动升力影响的高速艇迎浪纵向运动的数学模型

根据高速艇在静水及波浪中运动的特点,提出了高速艇迎浪纵向运动的基本假设,建立了能考虑动升力影响的高速艇迎浪纵向运动基本方程,并提出了高速艇迎浪纵向运动预报的一种新方法(滑航法),编制了理论预报程序,进行了模型试验验证研究.结果表明,中高航速时,滑航法可用于高速艇迎浪纵向运动的预报.     

临近空间高超声速目标拦截弹弹道规划

利用弹道规划设计了针对临近空间高超声速飞行器的拦截弹道。分析了临近空间高超声速目标拦截问题,将其定性为临近空间的远程高超声速拦截,并提出弹道规划需求;设计了一种两级助推的拦截弹,建立了考虑地球曲率和自转的拦截弹质点平面运动模型;根据弹道规划需求设计弹道约束,以末速最大、与终点距离误差最小和全程热量最小为指标建立拦截弹弹道规划问题;采用粒子群算法求解弹道,结果表明:符合约束的规划弹道是高抛再入形式,与比例导引弹道和准最佳弹道相比,拦截弹大部分时间飞行在大气层外,有效降低了气动热效应影响和对弹体材料的性能需求,且为末制导段提供良好的初始工作环境。     

US strategic preferences in the early twenty-first century

This article investigates how US national security planners have envisioned the emerging strategic environment during the early twenty-first century and evaluates how their perceptions of this strategic environment have changed during these years. This conceptual evolution can be seen in how defense planners define threats, identify defense priorities, and design security strategies. Five key strategic planning documents serve as the basis for this analysis and illustrate significant shifts in how the US government has envisioned its own security requirements as well as the context within which its strategic vision will need to be realized. These planning documents are: (1) Joint Vision 2020, (2) the Bush Administration's 2002 National Security Strategy of the United States, (3) the Obama Administration's 2010 National Security Strategy, (4) US Strategic Defense Guidance entitled Sustaining US Global Leadership: Priorities for 21^st Century Defense, and (5) the US Chairman of the Joint Chiefs of Staff's Capstone Concept for Joint Operations: Joint Force 2020.     

反向设计方法在防空导弹中的应用研究

对反向设计方法在防空导弹中的应用进行初步探讨。重点讨论了导弹总体、气动以及动力系统之间的关系。针对国外典型防空导弹,建立了反向设计模型,结合弹道仿真研究了国外典型防空导弹的战技指标、关键技术以及发展趋势。     

驱护舰编队对海作战中舰载无人机任务规划

任务规划是舰载无人机作战使用的基础。根据舰载无人机作战性能特点,从作战使用的角度对舰载无人机任务规划的概念进行了诠释,提出将舰载无人机的任务规划区分为战术规划和航迹规划,给出了舰载无人机任务规划应遵循的原则以及任务规划的内容和步骤,提出了舰载无人机在驱护舰编队对海作战中可遂行的战术任务。