参数化时频分析的匀加速旋转目标ISAR成像

对于机动目标,运动补偿后目标相对于雷达的转动不能近似为匀速转动,而是更接近于匀加速转动,此时传统的距离多普勒成像算法不能得到很好的成像结果.分析总结了几种针对非匀速转动的时频联合分析算法,提出了一种基于参数化时频分析-AGCD快速算法的匀加速旋转目标成像算法,仿真表明了该算法具有精度高、速度快且无交叉项的优点,比原有的一些算法有较大的改进.     

Coalitions & the Legitimisation of UK Security Policy

Abstract

David Moore analyses the role of the Treasury in detemining and controlling defence policy and expenditure, and the place of the MoD within this function.     

影响图建模算法的改进

影响图建模方法是一种规范化的复杂系统建模方法,其实质是将表征复杂系统的参量及参量间的耦合关系进行分类,并以此为基础建立系统的数学模型.影响图建模算法就是将系统的参量及参量间的耦合关系进行分类的算法.目前使用的算法是James R.Burns于1979年提出的.该算法仅考虑了最小的反馈回路,而没有考虑影响图中存在的一般反馈回路,且一些操作造成了不必要的循环.在分析该算法的基础上,考虑了一般的反馈回路,并对原算法的操作步骤进行了优化重组.     

基于马尔可夫过程的坦克火力随机对抗模型

根据小规模坦克火力对抗中所具有的马尔可夫性特点,将该过程视为离散状态、离散时间的马尔可夫随机过程(马尔可夫链),由此建立了坦克与反坦克武器系统之间一对一对抗的随机格斗模型,并给出双方获胜概率和平均对抗回合数的计算公式。最后通过实例验证了模型的有效性。该模型克服了轮流对抗不符合战场实际的缺点,为分队指挥员在射击策略的选择和分队火力运用上的快速决策提供了较为精确的量化依据。     

Technical note: Finite-time regret analysis of Kiefer-Wolfowitz stochastic approximation algorithm and nonparametric multi-product dynamic pricing with unknown demand

We consider the problem of nonparametric multi-product dynamic pricing with unknown demand and show that the problem may be formulated as an online model-free stochastic program, which can be solved by the classical Kiefer-Wolfowitz stochastic approximation (KWSA) algorithm. We prove that the expected cumulative regret of the KWSA algorithm is bounded above by where κ₁, κ₂ are positive constants and T is the number of periods for any T = 1, 2, … . Therefore, the regret of the KWSA algorithm grows in the order of , which achieves the lower bounds known for parametric dynamic pricing problems and shows that the nonparametric problems are not necessarily more difficult to solve than the parametric ones. Numerical experiments further demonstrate the effectiveness and efficiency of our proposed KW pricing policy by comparing with some pricing policies in the literature.     

战术互联网模拟训练系统军事总体问题研究

军事总体设计是技术总体设计的基础,是模拟训练系统设计的首要任务.对于战术互联网模拟训练系统军事总体设计中的有关问题,采用对比和比较法,对系统军事总体需求和框架进行了研究,明确了战术互联网模拟训练系统的训练方式、使用流程、功能体系等内容,为下一步系统的技术总体方案设计以及实现奠定了良好基础.     

Bernard Fall and Vietnamese Revolutionary Warfare in Indochina

This article assesses Bernard Fall’s concept of Vietnamese Revolutionary Warfare in Indochina between 1953 and 1958. It also investigates differences in the conceptualization of Revolutionary Warfare between Fall and proponents of French military doctrine known as la guerre révolutionnaire. The last component of the article considers limits of Fall’s influence on counterinsurgency doctrine.     

Reassessing Military Assistance to the Civil Powers: Are Traditional British Anti-Terrorist Responses Still Effective?

The provision of Military Assistance to the Civil Powers (MACP) encapsulates the traditional approach towards countering terrorism on the British mainland, which emphasises minimum force, proportionality, police primacy and the rule of law, with the military retained as a supporting instrument, being employed only as a measure of last resort. Recent terrorist incidents in major urban centres do, however, question the effectiveness of these established methods. This analysis initially codifies the conceptual issues that underscore the tensions between civil policing and military anti-terrorist approaches in the UK, and proceeds to evaluate and compare a number of operations that indicate the nature of the challenges facing the MACP apparatus. In particular, potential shortcomings in the MACP provisions are identified in the form of threat perception and deployment and enforcement gaps. The assessment finds that there are facets of MACP that are of enduring relevance in the current era, yet a continuing need persists to reconcile police and military imperatives toward serious civil disorder contingencies and conditions of emergency.     

武器系统采购费与维修费权衡的依据分析

根据武器系统寿命周期费用的理论和方法,建立了系统的费用模型,依据数学分析和优化理论,在已知可用武器系统目标数的前提下,建立了费用优化条件,确定了采购费与维修费的比例限值,用以确定武器系统采购费和维修费的最优比例,从而对系统方案确定的权衡分析提供量化依据.