On queues with dependent interarrival and service times

AnM/G/1 queueing system is studied in which the service time required by a customer is dependent on the interarrival time between his arrival and that of his predecessor Assuming the two variables are “associated,” we prove that the expected delay in this system is less than or equal to than of a conventional M/G/1 queue This conclusion has been verified via simulation by Mitchell and Paulson [9] for a special class of dependent M/M/1 queue. Their model is a special case of the one we consider here. We also study another modified GI/G/1 queue. where the arrival process and/or the service process are individually “associated”.     

火炮技术状况综合评估的数学模型

本文通过对火炮技术状况指标体系的分析,根据专家提供的经验数据,运用Fuzzy 数学理论建立了评价火炮技术状况的数学模型,并以152mm 加榴炮为例,对模型进行了验证.     

磁性部件（CBG装置）的改进方案研究

船用核动力装置中装配的ＣＢＧ装置是重要的热控装置,由于研制年代和国情的实际,该装置是以自饱和磁放大器为基本元器件,从而具有一定的局限性。为加强船用核动力装置运行安全,本文提出了新的改进方案,具有一定的实用价值。     

Allocation with demand competition: Uniform,proportional, and lexicographic mechanisms

We examine capacity allocation mechanisms in a supply chain comprising a monopolistic supplier and two competing retailers with asymmetric market powers. The supplier allocates limited capacity to retailers according to uniform, proportional, or lexicographic mechanism. We study the impact of these allocation mechanisms on supplier pricing decisions and retailer ordering behavior. With individual order size no greater than supplier capacity, we show that all three mechanisms guarantee equilibrium ordering. We provide precise structures of retailer ordering decisions in Nash and dominant equilibria. Further, we compare the mechanisms from the perspective of the supplier, the retailers, and the supply chain. We show that regardless of whether retailer market powers are symmetric, lexicographic allocation with any priority sequence of retailers is better than the other two mechanisms for the supplier. Further, under lexicographic allocation, the supplier gains more profit by granting higher priority to the retailer with greater market power. We also extend our study to the case with multiple retailers. © 2017 Wiley Periodicals, Inc. Naval Research Logistics 64: 85–107, 2017     

基于导弹空间飞行的空间碎片筛选方法研究

随着空间活动的日益频繁,空间碎片的数量也与日俱增,给远程弹道导弹的空间飞行安全带来巨大威胁。针对空间碎片数目繁多,为了快速进行导弹空间飞行安全预警和发射窗口选择,根据远程弹道导弹空间飞行特点,提出了适用于导弹与空间碎片碰撞预警的空间碎片筛选方法,并通过仿真计算证明了该筛选方法的科学性和合理性,该筛选方法可提高导弹空间飞行安全预警效率并缩短预警时间。     

构建贯彻落实科学发展观的长效机制

构建贯彻落实科学发展观的长效机制,必须坚持用创新理论引领,把准学习实践的"纲"和"魂";依靠思想和观念更新,赋予学习实践以生机活力;着力破解发展难题,增强学习实践的实际成效。     

军事通信中ad hoc网络路由协议性能分析

移动ad hoc组网灵活,抗毁性很强,将在未来的军事通信中发挥重要作用。因此,对于移动ad hoc网络研究中的首要的路由问题作了探讨,先简要介绍了两种典型的路由协议OLSR(Optimized Link State Routing)和AODV(Ad hoc On-Demand Distance Vector Routing),接着利用网络仿真工具OPNET分析了AODV的协议特点,最后比较了两种路由协议的性能。仿真结果表明AODV路由开销小,但时延大,节点移动过快时存在路由稳定性的问题;OLSR路由开销很大,但时延相对较小。因此在搭建军用adhoc网时,应根据实际使用情形做出选择。     

组合级产品实行“双铭牌”制的设想

本文阐述了组合级产品的本质属性和使用属性,分析了组合级产品铭牌在使用中存在的问题,提出了组合级产品实行"双铭牌"制的设想,并提出了简便可行的解决方案。     

惯导信息辅助的匹配模板校正方法

面向飞行器对地面目标的匹配系统应用,提出一种惯导信息辅助的模板校正方法.根据目标位置以及摄像机位姿信息,建立目标透视成像模型以及不同摄像机位姿下的模板校正方程;通过分析目标任意点与形心的景深关系,对校正方程进行转化并给出完整的模板校正算法.最后通过基于视景仿真技术搭建的目标模拟平台,截取不同摄像机位姿下的目标成像,并与...     

特定能级下Fermi体系反演

对特定能级下Fermi反演进行了研究。首先提出问题的不适定性,然后用Tikhonov正则化方法的思想,将问题离散化后,用代数正则化方法求稳定近似解。并给出了误差估计,最后,给出了数值实例。