战时弹药供应协同调运模型研究

弹药协同调运是战时弹药保障工作中的重要环节,其协同调运的合理性将直接影响到弹药保障工作的顺利进行.针对弹药的调运问题,从战时技术实施与应用角度研究弹药的调运问题,以到达需求点的运输时间、弹药输送车数量以及弹药损失量为优化目标,建立一种多目标决策模型,为缩短运输时间、减少弹药输送车数量、提高安全到达需求点的弹药量提供一种实用的方法.     

带优先级的单类型航空弹药转运多目标规划模型

针对航母航空弹药转运过程非常复杂、涉及设备多、要求高的特点，在对其流程进行细致分析的基础上，将其抽象为一个两阶段多目标规划问题。同时，深入分析了转运过程中的各种约束条件、构建了该问题的两阶段优化模型。建模时，不仅考虑了武器升降机的有效利用、弹药量的合理分配等因素，还考虑了转运时对于不同类型弹药转运优先级与停机区弹药需求优先级的要求。通过模型优化，在满足转运优先级要求的基础上，能有效提高航空弹药的转运效率。     

Designing and pricing menus of extended warranty contracts

Extended warranties provide “piece of mind” to a consumer in that product failures which occur after the base warranty expires are rectified at little or no cost. They also provide an additional source of revenue for manufacturers or third‐party providers, such as retailers or insurance providers, and help cultivate consumer loyalty. In this article, we analyze a number of extended warranty contracts which differ in design, including restrictions on deferrals and renewals. With the use of dynamic programming, we compute the optimal strategy for a consumer with perfect information and determine the optimal pricing policy for the provider given the consumer's risk characterization. We also provide insight into when different contracts should be issued. Finally, we illustrate how profits can be dramatically increased by offering menus of warranty contracts, as opposed to stand alone contracts, with the use of integer programming. Surprisingly, risk‐taking consumers provide the greatest benefit to offering menus. These insights can help a company develop a comprehensive warranty planning strategy for given products or product lines. © 2009 Wiley Periodicals, Inc. Naval Research Logistics 2009     

基于灰色理论的防御要点优选模型及应用

运用多目标决策分析原理,依据选择防御要点的基本要求,从"地位重要、地形有利、地幅适当"的角度分析了防御要点的影响因素集,运用灰色理论建立了防御要点灰色关联优选模型,达到了对防御要点进行排序和优选的目的,为指挥员实施防御作战的科学决策提供辅助依据。     

多机协同多目标攻击空空作战系统研究

主要研究了实现多机协同多目标攻击空空作战的关键问题--多机协同多目标攻击空空作战的空战决策,设计了空战决策算法,并对整个决策系统进行了仿真.然后,设计了多机协同多目标攻击空空作战系统,将空战决策,导弹攻击区判断,导弹攻击融为一体,并进行了仿真.仿真结果验证了空战决策算法的正确性.     

Optimal design of accelerated life testing plans for periodical replacement with penalty

Accelerated life testing (ALT), enhanced by optimal test plans, has been widely accepted in practice as a quick approach for estimating the reliability of a product. From the estimation result, preventive maintenance schedules can be determined to ensure the performance of the product under its normal operating conditions. By default, maintenance decision‐making is regarded as the last and least rewarding step. However, sometimes the maintenance schedules, such as preventive maintenance intervals, are predetermined due to customer concerns and/or by various mandatory regulations and rules. Under such circumstances, how to accurately estimate the expenditure (e.g., on maintenance or spare parts management) associated with these maintenance requirements becomes an important issue. A viable solution is to incorporate the maintenance requirements into ALT plans. This paper provides an approach for the optimal design of ALT plans oriented by a mandatory periodical replacement schedule subject to a discounted penalty. The objective is to improve the estimation accuracy of the economic impact of this maintenance requirement. A numerical experiment is provided to demonstrate the approach in practical use. © 2008 Wiley Periodicals, Inc. Naval Research Logistics 2009     

带时间窗的相控阵雷达实时任务调度方法

为了解决传统相控阵雷达任务调度中采用基于工作方式优先级的方法而存在忽略任务时间紧迫性和重要性的问题,提出了一种基于任务自身工作方式优先级、截止期和空闲时间3个特征参数的相控阵雷达任务调度方法,通过调整参数的权重来适应调度器不同的负载情况,并采用时间窗处理发生冲突的任务请求,确保更多的高优先级任务在调度间隔内被调度。仿真结果表明,所提出的方法能够有效提高任务的调度成功率,明显改善调度器性能。     

基于区间直觉模糊集的目标优先级求解方法

针对复杂防空作战环境下多目标优先级难以准确评估的问题,提出了基于区间直觉模糊集理论的目标优先级求解算法。首先系统分析了影响目标优先级的因素以及各影响因素与目标优先级之间的非线性关系。其次,对区间直觉模糊集的得分函数和精确函数进行了改进,考虑了犹豫度信息对决策结果的影响,并且提出了基于得分函数和精确函数的目标优先级求解算法。最后通过仿真算例验证了算法的有效性。     

无动力逃生梯部分替代疏散楼梯的可行性研究

从无动力逃生梯的工作原理、自身优点、疏散能力和产品造价等方面与安全疏散楼梯进行比较，对无动力逃生梯部分替代疏散楼梯的可行性进行了深入分析和探讨，最后得出可以根据建筑的消防安全疏散的实际情况部分替代疏散楼梯。     

不确定多属性决策的单目标优化方法研究

运用神经网络的非线性映射和遗传算法的寻优特性,建立了不确定多属性决策的单目标优化模型。把属性值区间作为遗传算法染色体的搜索范围,用训练好的神经网络计算适应度。用不同的适应度函数来计算综合属性值区间数的下界和上界,然后对方案进行排序。算例结果表明,该方法是可行的。