A PANEL DATA ANALYSIS OF THE NEXUS BETWEEN DEFENCE SPENDING AND GROWTH IN THE EUROPEAN UNION: A COMMENT

Abstract

This paper explains and assesses the UK experience with determining prices and profitability for non-competitive defence contracts. Three periods are considered, namely pre-1968, the 1968 Profit Formula Agreement and the changes introduced in 2014. Two cases of ‘excessive’ profits were major determinants of the 1968 Profit Formula Agreement; but continued dissatisfaction with the 1968 Agreement led to changes in 2014. The historical overview of UK experience provides a basis for understanding current UK policy and offers insights for other countries facing similar policy challenges. A critique is presented of UK policy on single source pricing and profitability.     

基于CPLD与单片机的多路高精度数据采集系统设计

结合CPLD与单片机设计了一种多路高精度数据采集系统,最高可达24位转换精度。所采集数据具备良好的实时性,可采集通道数目多,同时系统具备较强的抗外界干扰能力,结构简单,可靠性好。该系统具有较强的可移植性,能够广泛应用于多路、高精度、低频数据采集的场合。     

FAE野外空中爆炸效应实验研究及其一次起爆机理探讨

野外进行1．8kg的FAE静爆实验,采用不同配方的纯固态燃料和液一固混合燃料与等质量的TNT对比分析。实验结果表明,FAE的爆炸效果明显优于等质量的TNT,而纯固态FAE爆炸性能强于液一固混合FAE;FAE爆炸后测到的超压分布呈现单调减趋势,这是由于测量点都分布在云爆区范围之外;FAE的云雾分散效果优于等质量的TNT装药,火焰持续时间也长。通过高速摄影图片看出,合适配方的纯固态无约束的FAE弹体火球的持续时间与有约束的液一固混合FAE弹体相当。分析了纯固态FAE爆炸后超压峰值时刻与火球最大直径时刻不同步的原因,探讨了纯固态FAE一次起爆机理。     

近程简易控制火箭末修的效率分析

阐述了脉冲控制力实施简易控制的特点,针对某近程单兵火箭建立了其弹道模型,在弹体周向布置两种大小不同的脉冲发动机,采用两种脉冲延时分级控制的控制策略对其实施简易控制,对其控制时刻、转速影响、分档设计等进行了分析证明对该单兵火箭实施简易控制是可行的.     

On equivalence between the proportionate flow shop and single‐machine scheduling problems

We derive sufficient conditions which, when satisfied, guarantee that an optimal solution for a single‐machine scheduling problem is also optimal for the corresponding proportionate flow shop scheduling problem. We then utilize these sufficient conditions to show the solvability in polynomial time of numerous proportionate flow shop scheduling problems with fixed job processing times, position‐dependent job processing times, controllable job processing times, and also problems with job rejection. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 595–603, 2015     

Scheduling research and the first decade of NRLQ: A historical perspective

It is generally recognized that the first model involving job scheduling was presented by Selmer Johnson and published in the inaugural issue of Naval Research Logistics Quarterly (NRLQ) in 1954. NRLQ also published another seminal scheduling paper by Wayne E. Smith a short time later. In the present paper, we discuss the contribution of NRLQ and the role of the Office of Naval Research in the development of the scheduling literature during the first decade (1954–1963). We also provide a critical analysis of the papers by Johnson and Smith. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 335–344, 2015     

多准则下反导作战单、多遭遇点预测模型

整个反导射击过程可以简单看作一个基于预测的遭遇点起始的,不断重复、修正的过程。分析遭遇点预测的时间和空间前提,并给出遭遇点预测的3个基本准则;在多准则下建立了单遭遇点预测模型,给出了模型公式中未知量的转化方法;分射击-观察-射击和射击-射击两种情况建立了多准则下多遭遇点预测和优化模型,并给出了拦截弹最晚发射时间的计算方法;就观察时机对遭遇点预测的影响进行了分析与建模。部分研究属于探索性的研究,相关结论对指控模型开发和实施连续反导,从方法和作战理念方面提供了一些参考。     

磷虾群免疫粒子滤波的机载单站无源定位算法

为了进一步提高机载单站无源定位的精度,将磷虾群优化思想引入到粒子滤波的重采样阶段,提出了一种磷虾群免疫粒子滤波算法。该算法利用磷虾的受诱导运动、觅食以及随机扩散行为,将粒子导向高似然区域,有效缓解了粒子退化问题。同时,其采用了人工免疫算法的变异操作,避免了早熟现象的出现,提高了粒子的多样性,克服了粒子贫化问题。仿真结果表明,新算法改善了机载单站无源定位的定位精度以及收敛速度。     

对单兵火箭提前修正量的分析研究

为了实现某型单兵火箭的射击在陆军分队作战模拟仿真系统中的仿真模拟,运用数理统计理论对单兵火箭提前修正量进行分析研究,论证了单兵火箭的射程与提前修正量的一元线性回归分析的统计规律,给出了一元线性回归方程和提前修正量的置信区间,论证了在置信区间中的实际提前修正量的射击的弹着点符合正态分布的射击规律和散布律公式。根据得到的理论结果,指导模拟仿真系统对单兵火箭的射击进行仿真模拟。     

A note on the forecast performance of temporal aggregation

Earlier research on the effects of nonoverlapping temporal aggregation on demand forecasting showed the benefits associated with such an approach under a stationary AR(1) or MA(1) processes for decision making conducted at the disaggregate level. The first objective of this note is to extend those important results by considering a more general underlying demand process. The second objective is to assess the conditions under which aggregation may be a preferable approach for improving decision making at the aggregate level as well. We confirm the validity of previous results under more general conditions, and we show the increased benefit resulting from forecasting by temporal aggregation at lower frequency time units. © 2014 Wiley Periodicals, Inc. Naval Research Logistics 61: 489–500, 2014