磁悬浮列车系统轨道动力学分析与试验研究

本文建立了磁悬浮列车系统轨道动力学方程组,讨论了轨道结构参数对弹性轨变形、极限速度及模态的影响,并结合KDⅢ车的试验结果作出分析。     

Critics gone wild: Counterinsurgency as the root of all evil

The Western interventions in Iraq and Afghanistan have produced a heated polemic concerning the merits and demerits of counterinsurgency – the operational approach underpinning both campaigns. The two books reviewed here provide a good summation of the arguments against counterinsurgency: it is not a strategy and will fail when mistaken as such; its theory does not make intervention and war significantly easier; and even the most successful counterinsurgency campaigns have been bloody, violent, and protracted. Yet as this review highlights, beyond these central points, criticism of counterinsurgency is too often off the mark in its approach and totalizing in its pretentions. There is much to criticize and an urgent need to learn from past campaigns, yet bold claims and broad generalizations can mislead rather than enlighten. The analysis is particularly unhelpful when the definition of the central issue at hand – counterinsurgency – is being unwittingly or deliberately distorted. In the end, these two books form a poor basis for the debate that must now take place, because they are too ideological in tone, too undisciplined in approach, and therefore too unqualified in what they finally say.     

基于MOEA/D的航天器隔振器多目标优化方法研究

由于存在各种高频内部扰动,高精度航天器通常需要进行隔振设计,而被动隔振装置被广泛采用。在被动隔振装置设计中,抑制共振响应峰和隔离中高频振动存在很强的冲突性,需要进行多目标优化设计。首先,建立了隔振系统的动力学模型,提出了以传递函数共振峰幅值和中高频衰减为目标函数的多目标优化模型;其次,提出了基于分解的多目标进化算法（MOEA/D）对单级和两级级隔振装置进行多目标优化的设计方法;最后,对某空间隔振装置进行了数值仿真,结果验证了本文算法的有效性。     

数码仿造迷彩客观定量评价

为了客观定量评价数码仿造迷彩的伪装效果,根据人眼视觉特性,提出基于HSV颜色空间亮度差的权重因子对SSIM算法加权进行了改进,得到了从人眼视觉特性上客观定量评价数码迷彩图案与原图像的识别概率。识别概率的大小与目标实施伪装技术的优劣有关,识别概率越高,则目标越易被侦察器材识别,伪装效果越差,反之不易被识别,伪装效果越好。因此该算法可为进一步改进伪装技术措施提供依据。     

Dynamic globularization prediction during cogging process of large size TC11 titanium alloy billet with lamellar structure

The flow behavior and dynamic globularization of TC11 titanium alloy during subtransus deformation are investigated through hot compression tests. A constitutive model is established based on physical-based hardening model and phenomenological softening model. And based on the recrystallization mechanisms of globularization, the Avrami type kinetics model is established for prediction of globularization fraction and globularized grain size under large strain subtransus deformation of TC11 alloy. As the preliminary application of the previous results, the cogging process of large size TC11 alloy billet is simulated. Based on subroutine development of the DEFORM software, the coupled simulation of one fire cogging process is developed. It shows that the predicted results are in good agreement with the experimental results in forging load and microstructure characteristic, which validates the reliability of the developed FEM subroutine models.     

航母编队特点及对策研究

为了打赢未来可能发生的高技术局部战争,必须深入研究航母编队特点,积极探索能有效克制航母编队的战法。从航母编队的作战编成、攻防体系和队形以及C3I系统的结构及功能等方面分析了航母编队的特点,重点研究了航母编队C3I系统的特点。针对其特点,提出了几点抗击航母编队的对策。     

基于模糊信息粒化理论的图像插值方法

提出了模糊信息粒化理论在图像插值中的应用,介绍了图像的模糊信息粒化结构,分析了基于图像模糊粒化思想进行图像插值的基本原理,并提出了具体的基于图像模糊粒化结构的插值方法。实验结果表明该方法的效果很好,在客观评价指标上,性能普遍好于传统的图像插值方法。     

新课标高考物理试卷的命题特点及备考策略

高考复习是一个系统工程,每一个环节要精心筹划,落实到位,才能取得好的效果。文章认真分析2008～2011年新课标高考物理试卷的结构和命题特点,探讨了今后高考命题的动向和规律,提出了可操作的备考策略。     

基于形态滤波的漏磁信号基线漂移在线处理

为了实现快速漏磁检测,采用形态滤波的方法对漏磁信号的基线漂移进行在线处理．首先,运用Maragos类型形态滤波器,选择平面结构元素作为最佳形态滤波形式,并通过实验得到最佳结构元素选取标准;然后,利用该滤波器和小波分解的方法分别对仿真信号和采集到的漏磁信号进行基线漂移的处理．结果表明：形态滤波的方法能够实时准确地实现基线漂移的去除．     

基于IDEF3的部队装备中修业务流程优化重组

以IDEF3为工具描述了部队装备中修业务流程,分析了流程中存在的问题,通过采用基于状态的维修方式、无损检测先进技术手段、共享维修保障信息和调整器材发放审批权限等方法,对部队现行装备中修业务流程进行了优化,可有效解决装备维修过剩、维修不足、维修资源浪费和维修周期过长等问题．