以色列“铁穹”防空系统性能研究与作战分析

对以色列“铁穹”防空导弹系统的发展情况进行梳理;在简要介绍“铁穹”系统的组成、功能特点的基础上;重点分析了“塔米尔”（Tamir）导弹的总体方案、气动特性、探测制导及战斗部设计方案。并对“铁穹”系统部署以来的作战应用情况进行整理;通过对“铁穹”系统效能展开分析;对单营套“铁穹”系统面对火箭弹饱和攻击的拦截能力进行分析。最后结合“铁穹”系统的发展路径对国外近程防空导弹系统的技术发展趋势进行了总结。     

分组密码uBlock算法快速软件实现

为对国产分组密码算法uBlock进行软件优化,选择支持256 bit数据位宽的AVX2指令集,提高编译器自动优化等级,优化函数的调用过程,优化数据存储结构,综合使用高位并行、低延迟指令逻辑优化等方法实现单线程并行计算。通过使用这种有效的组合方法,uBlock-128/128算法、uBlock-128/256算法和uBlock-256/256算法单密钥短消息加密的速度较原代码分别提升269%、182%和49%。基于这些优化方法,uBlock-128/128、uBlock-128/256和uBlock-256/256三个算法版本均实现了单密钥场景与多密钥场景。     

面向协作式网络化的作战计划生成过程模型

传统的指挥控制系统中作战计划生成过程网络化程度低,各个软件模块间难以进行协作。针对战术作战计划生成问题,参照工作流元模型,对计划生成流程进行分析,提出了计划生成过程模型。重点针对作战计划生成过程中的网络化协作问题,在现有模型的基础上,提出了适用于战术作战计划生成的轻量级工作流引擎的设计思想,最后结合工作流技术,设计了辅助作战计划生成的流程组织工具,通过该工具手动或自动地进行作战计划生成过程,验证了该模型的有效性。     

On a class of multiple failure mode systems

The primary objective of this work is to introduce and perform a detailed study of a class of multistate reliability structures in which no ordering in the levels of components' performances is necessary. In particular, the present paper develops the basic theory (exact reliability formulae, reliability bounds, asymptotic results) that will make it feasible to investigate systems whose components are allowed to experience m ≥ 2 kinds of failure (failure modes), and their breakdown is described by different families of cut sets in each mode. For illustration purposes, two classical (binary) systems are extended to analogous multiple failure mode structures, and their reliability performance (bounds and asymptotic behavior) is investigated by numerical experimentation. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 167–185, 2002; DOI 10.1002/nav.10007     

An informal framework to aid the analysis and design of military posture

The design of military posture is an exercise in confronting potential enemies’ capabilities within the context of geographic, technological, temporal, political and economic constraints. No formal model is capable of encapsulating the essentials of so complex an environment for closed or simulated analysis, but it is useful to have an informal framework within which to reason interactively within these dimensions.

This paper presents such a scaffolding, patterned on the notion of a military posture as the output of an economic process whose structure reflects important determinants of the characteristics and extents of weaponry and expenditures that are appropriate to the environment within the feasibility set determined by the constraints. The analysis remains at an abstract level, but it does highlight the important shifts toward preparation for littoral warfare, greater reliance on reserve rather than active forces, and necessary changes in missions among military departments.     

消防指挥学学科建设中应把握的几个问题

消防部队是一支执行灭火救援任务的军事化和专业化队伍,其军事性决定了消防指挥学专业的军事学学科门类,消防指挥学在被正确定位的基础上,消防指挥学学科建设要准确把握学科定位,总结其发展规律,加强理论体系建设等关键问题,并进行系统的分析和探讨。     

关于推进农业产业化经营的思考

推进农业产业化经营的关键是抓务实。这就要求:从科学区分外部拉动型、内部合作型、产业链一体化型三种农业产业化经营基本类型和正确处理土地规模经营与家庭承包经营、发展农业与发展其他产业、政府宏观调控与企业、农户自主经营的关系入手,科学选择农业产业化经营的模式;在正确把握目前我国农业产业化经营在农产品竞争力、市场建设、利益机制、政府行为等方面存在的问题的基础上,采取相应对策。     

基于多尺度形态学操作的超声图像增强方法

针对医学超声图像低对比度和强噪声给医疗诊断和图像处理所带来的困难,通过基于多尺度形态学操作的方法实现图像增强和噪声抑制的目的.该方法将传统的图像增强概念延伸到数学形态学多尺度空间中,利用多尺度形态学操作提取图像多尺度特征,并通过改变这些特征的强度实现图像局部对比度增强和噪声抑制.实验证明,该方法对超声图像局部对比度增强和噪声抑制是有效的.     

The value of information sharing in a two‐stage supply chain with production capacity constraints

We consider a simple two‐stage supply chain with a single retailer facing i.i.d. demand and a single manufacturer with finite production capacity. We analyze the value of information sharing between the retailer and the manufacturer over a finite time horizon. In our model, the manufacturer receives demand information from the retailer even during time periods in which the retailer does not order. To analyze the impact of information sharing, we consider the following three strategies: (1) the retailer does not share demand information with the manufacturer; (2) the retailer does share demand information with the manufacturer and the manufacturer uses the optimal policy to schedule production; (3) the retailer shares demand information with the manufacturer and the manufacturer uses a greedy policy to schedule production. These strategies allow us to study the impact of information sharing on the manufacturer as a function of the production capacity, and the frequency and timing in which demand information is shared. © 2003 Wiley Periodicals, Inc. Naval Research Logistics, 2003