Convolutions and generalization of logconcavity: Implications and applications

Additive convolution of unimodal and α‐unimodal random variables are known as an old classic problem which has attracted the attention of many authors in theory and applied fields. Another type of convolution, called multiplicative convolution, is rather younger. In this article, we first focus on this newer concept and obtain several useful results in which the most important ones is that if is logconcave then so are and for some suitable increasing functions ?. This result contains and as two more important special cases. Furthermore, one table including more applied distributions comparing logconcavity of f(x) and and two comprehensive implications charts are provided. Then, these fundamental results are applied to aging properties, existence of moments and several kinds of ordered random variables. Multiplicative strong unimodality in the discrete case is also introduced and its properties are investigated. In the second part of the article, some refinements are made for additive convolutions. A remaining open problem is completed and a conjecture concerning convolution of discrete α‐unimodal distributions is settled. Then, we shall show that an existing result regarding convolution of symmetric discrete unimodal distributions is not correct and an easy alternative proof is presented. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 109–123, 2016     

反潜无人艇军事需求与作战模式

本文分析了反潜无人艇在打造新型水下作战体系、夺取水下空间控制权中的现实军事需求,对反潜无人艇担负的作战任务及典型作战模式进行研究,并针对任务实际提出了反潜无人艇的能力需要。     

运用3D打印技术提升装备保障训练水平

3D打印技术是一种快速成型技术,在不同领域均有成熟应用。部队现有的技术人才构成、成熟配套的软硬环境、打印材料的多样性,为3D打印技术应用于装备保障训练提供了可能。目前,部队现有的装备保障训练手段仍较为传统、单一,特别是工作原理、故障排除课目很难保证训练效果,严重制约装备保障能力提高。应用3D打印技术,着重对重难点课目进行设计,解决"无法训、训不到、效果差"等训练瓶颈问题,是对现有训练手段的丰富和完善,是继模拟训练、虚拟训练之后的又一新手段、方法,对提高装备训练水平、保证训练质量有重大意义。     

新体制下军队院校教育实战化

加强军队院校教育实战化改革,提高基层指挥员实战化素养,是推动部队实战化训练末端落实的有效途径。在军队院校改革重组的背景下,应改善实战化教学条件,强化军队院校师资力量与部队接轨,创新实战化教学内容构建,提高军队院校教育实战化水平,实现人才培养与未来作战需求的最佳融合。     

Optimal motion planning in rapid‐fire combat situations with attacker uncertainty

This article provides a modeling framework for quantifying cost and optimizing motion plans in combat situations with rapid weapon fire, multiple agents, and attacker uncertainty characterized by uncertain parameters. Recent developments in numerical optimal control enable the efficient computation of numerical solutions for optimization problems with multiple agents, nonlinear dynamics, and a broad class of objectives. This facilitates the application of more realistic, equipment‐based combat models, which track both more realistic models, which track both agent motion and dynamic equipment capabilities. We present such a framework, along with a described algorithm for finding numerical solutions, and a numerical example.     

基于对策论的C4ISR系统作战效能评估方法

C4ISR系统在现代战争中的重要作用使得其评价问题得到了前所未有的重视.但C4ISR系统的复杂性使得大多研究仅限于其自身效能,而对使用效能特别是作战效能的评估则关注较少.通过对C4ISR系统效能评估的分析和研究,提出了一种基于对策论的C4ISR系统作战效能评估方法,利用矩阵对策构建不同作战策略的效能评估模型,实现了对抗环境中C4ISR系统作战效能的动态评估,并给出了模型的分析与求解方法.     

基于神经网络TSP算法的防空作战火力分配

基于神经网络TSP算法建立了防空作战火力分配模型,并通过在计算机上仿真运行了实例,优化了火力分配方案.这是对解决防空作战火力分配问题的一种有益的尝试与探索,同时也对防空作战指挥决策和理论研究以及指挥自动化系统建设提供了参考.     

炮兵C3I系统诸弹道模型的建立与分析

各级炮兵C3I系统、火控系统等决定射击诸元所采用的弹道数学模型比较多,每一种模型都有其产生的历史背景、适用的场合、优点和不足.就目前各系统所采用的"射表法"、"射表拟合法"、"弹道诸元解析法"、"弹丸运动微分方程"等数学模型、解算方法进行了分析、对比,给出了各种模型和方法的优点、缺点及其适用场合.对系统设计、快速准确地求解射击诸元和偏差修正具有指导意义.     

基于HLA的潜艇作战仿真训练系统

潜艇是一个技术密集、功能设备较多,操作战位分散、相互协同要求高的作战整体,其作战仿真训练系统对各仿真部位和控制部位的可重用性和互操作性要求很高,潜艇作为潜艇作战仿真训练系统的核心,其仿真水平的高低将直接影响整个系统的训练效能.为了提高潜艇作战仿真训练系统联邦的可重用性,增强各仿真部位和控制部位的互操作性,构造更为合理的体系结构,结合潜艇部队装备发展和作战训练实际,基于高层体系结构(HLA)机制,重点研究基于HLA的潜艇作战仿真训练系统联邦中潜艇联邦成员的实现问题.     

编队超视距空战效能评估方法

现有的两步裁定空战模型大多直接借鉴基于飞机易损性的先敌发射概率计算方法,而各种飞机的易损性无法通过解析模型来获取,因此降低了模型的通用性.在现有的研究基础上提出了作战飞机先敌发射指数概念,并基于空战双方的先敌发射指数提出了新的先敌发射概率计算模型和更为具体的编队超视距空战效能评估模型.最后给出了相关实例进行验证.