美军军官能力建设初探

美军军官能力建设是美军现代化建设的一个重要环节,其基本情况表现为在军官能力建设的目标上突出信息化、知识化;在军官能力建设的起点上,坚持军官来源的高标准、严要求,严把入口关;在军官能力的培养方面,坚持层次分明、重点突出的院校培训体系。     

着力提升党委领导创新的能力

着力提升党委领导创新的能力,必须找准观察和认识各类问题的新视角;理清处理和解决现实问题的新思路;完善指导和推进部队建设的新机制。     

自觉加强党性修养 永葆共产党人先进性

自觉加强党性修养,是新形势下保持共产党员先进性的必然要求和必由之路.要注重贯彻理论和实践相结合的原则,突出四个重点,充分发挥主观能动性,引导广大党员着眼履行军队神圣使命,紧密联系思想和本职岗位实际,自觉把开展先进性教育的过程作为加强党性修养、实践先进性要求、塑造先进性形象的过程.     

Dynamic pricing in a dual‐market environment

This article is concerned with the determination of pricing strategies for a firm that in each period of a finite horizon receives replenishment quantities of a single product which it sells in two markets, for example, a long‐distance market and an on‐site market. The key difference between the two markets is that the long‐distance market provides for a one period delay in demand fulfillment. In contrast, on‐site orders must be filled immediately as the customer is at the physical on‐site location. We model the demands in consecutive periods as independent random variables and their distributions depend on the item's price in accordance with two general stochastic demand functions: additive or multiplicative. The firm uses a single pool of inventory to fulfill demands from both markets. We investigate properties of the structure of the dynamic pricing strategy that maximizes the total expected discounted profit over the finite time horizon, under fixed or controlled replenishment conditions. Further, we provide conditions under which one market may be the preferred outlet to sale over the other. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 531–549, 2015     

抗战时期蒋介石与知识青年从军运动

抗战之初,国民政府贯彻蒋介石的"战时须作平时看"教育方针,并未大规模地征集知识青年从军参战。抗战后期受形势所迫,蒋介石遂发起规模浩大的知识青年从军运动。推动蒋介石改变初衷的原因为:向军队补充高素质人才,重树民众对政府信心,整顿国民党的组织;积蓄力量准备内战等。运动一定程度上达到了蒋介石所预想的效果。     

基于多源数据融合的GEO目标轨道改进分析

以美国新一代天基监视卫星SBSS为例,构建了天地联合方式观测GEO目标的观测模型。同时作为对比,介绍了传统地基雷达的距离测量模型;提出了将天地联合测量数据与传统地基测距数据融合,利用扩展卡尔曼滤波(extended Kalman filter,EKF)对GEO目标进行轨道改进的方法。仿真结果表明,利用2种不同方式的观测数据对GEO目标轨道进行改进,得到的定轨误差效果好于只有一种测量数据的结果。     

基于XilinxFPGA的数字下变频的实现

为解决专用数字下变频芯片价格昂贵、灵活性不强的问题,研究了如何基于FPGA实现数字下变频的功能。本设计结合硬件资源从数字下变频的系统各模块的主要功能,以及从彼此间的性能制约上考虑,先通过MATLAB仿真选择合适的参数,然后在Xilinx公司ISES．2开发环境下,使用Verifog语言编程实现。最后对基于FPGA实现的数字下变频系统调用Modelsim进行仿真测试,验证了设计的正确性。     

回转体壁面喷气出流均匀度影响因素分析

为改善喷气出漉均匀度从而提高减阻率,采用数值模拟的方法,研究了总进气流量、滤板、,喷孔大小、出口背压等因素对喷气装王出口流量分布的影响.敷值计算结果表明:较小的喷孔可大幅提高出口气流均匀度;在喷孔直径较大时(3 mm),加装滤板有一定的整流作用,增加滤板层敷对出口流量均匀度改善不大;喷孔直径较小时(0.8 mm).加装滤板对出口流量分布影响不大,可以不使用滤板;出口背压沿浸深线性分布使出口流量向背压低的喷孔偏移,出口背压小的喷孔流量大,出口背压大的喷孔流量小;总进气流量增大,出口流量均匀性提高.     

United Nations Security Council reform and the dilemmas of African continental integration

This article analyses the disunity among African states in terms of United Nations Security Council (UNSC) reform, and attributes it to the contest between South Africa and Nigeria. These two countries have been locked in a hegemonic contest for continental domination. To this end, the article notes that African unity, not in terms of protocol but on the basis of principles and cooperation, is sacrosanct in order for the African Union to make a significant contribution to the reform of the UNSC. It is asserted that the contest between South Africa and Nigeria has been symbolised by the continental leadership aspirations of the heads of state of both countries, and recommends that it be tamed through forging diplomatic and strategic partnerships between the ruling parties of these two countries. The influence of external actors on the African countries, particularly that of France, is underscored as a contributing factor in stalling the debate on the UNSC reform. It recommends that South Africa use its strategic partnership within the association of Brazil, Russia, India, China and South Africa (BRICS), particularly Russia and China as permanent members of the UNSC, to influence the realisation of the reform debate.     

一种雷达红外联合部署模型及优化求解方法

针对战场上种类和数量众多的传感器配合使用的情况,为了充分利用传感器资源,提高传感器网的探测性能,提出了一种雷达红外联合优化部署方法.本方法借鉴了离散化思想对防区进行了划分,用矩阵形式对雷达红外联合部署方案、探测能力、约束条件以及探测要求进行了描述,给出了优化问题的数学模型,并使用PSO算法对问题求解.给出了仿真结果,证...