战时装备调配保障决策模型构建研究

分析了战时装备调配保障决策的特点,运用模糊聚类分析法对装备调配保障对象进行了分组和优先级排序,以此为基础,运用目标规划法构建了战时装备调配保障决策模型,最后,通过实例验证了模型的可行性和有效性．     

土体泊松比对压入管桩单桩挤土位移场的影响

基于ABAQUS有限元软件,采用主从接触算法模拟桩-土相互作用、修正剑桥模型作为土体本构模型,通过在桩顶施加竖向位移荷载以及合适的网格划分技术建立了较为符合压入管桩压桩实际的有限元模型。利用得到的有限元模型模拟了压入管桩压桩产生的挤土位移场,对不同泊松比时压入管桩单桩挤土位移场进行了对比分析。结果表明:不同泊松比时竖向和水平挤土位移场沿深度方向和径向的分布规律趋于一致;土体泊松比的变化会对压入管桩压桩产生的竖向和水平挤土位移场产生较大影响;泊松比越大,压桩产生的竖向和水平挤土位移越大。     

The British army,information management and the First World War revolution in military affairs

Information Management (IM) – the systematic ordering, processing and channelling of information within organisations – forms a critical component of modern military command and control systems. As a subject of scholarly enquiry, however, the history of military IM has been relatively poorly served. Employing new and under-utilised archival sources, this article takes the British Expeditionary Force (BEF) of the First World War as its case study and assesses the extent to which its IM system contributed to the emergence of the modern battlefield in 1918. It argues that the demands of fighting a modern war resulted in a general, but not universal, improvement in the BEF’s IM techniques, which in turn laid the groundwork, albeit in embryonic form, for the IM systems of modern armies.     

Unrestricted warfare: Review essay I

During the Nigerian Civil War (1967–1970), France chose to support Biafra, but only on a limited scale, providing mercenaries and obsolete weaponry to Ojukwu's regime. General Charles de Gaulle's assistance to Ojukwu was conditioned by the French military drawdown after 1961, the increased power of French secret services on the continent, and the interventions in Katanga (1960–1963), Gabon (1964) and Chad (1968–1972). France supported Biafra primarily to protect its former colonies from Nigeria, stop Soviet subversion and acquire an economic foothold in the oil-rich Niger Delta. De Gaulle chose a limited strategy for two reasons. If Biafra won the war, France would be Biafra's greatest ally. If Nigeria won the war, France could extricate itself from the situation relatively easily and re-establish relations with the Nigerian government, which is what ultimately occurred.     

公安边防部队遂行边境封控任务探究

边境封控行动事关国家安全和社会稳定大局,已成为新的历史条件下公安边防部队重要的职能和任务。分析公安边防部队边境封控行动的主要任务,探讨边境封控行动的特点和原则,提出公安边防部队边境封控行动的主要方法。     

中国特色社会主义事业发展布局的创新与发展

十八大首次将经济、政治、文化、社会和生态五大建设并列,强调“五位一体”建设中国特色社会主义。由此,中国特色社会主义发展布局历经四个阶段,即：“一个中心,两个基本点”的战略布局,“三位一体”发展布局,“四位一体”发展布局,“五位一体”发展布局。“五位一体”总体布局是一个相互联系、相互协调、相互促进、相辅相成的有机整体,对于开创中国特色社会主义事业新局面意义重大,为到本世纪中叶基本实现社会主义现代化,提供了有力支撑。     

文化安全视角下的新疆高校网络舆情管理探究

文化安全的关键在意识形态,意识形态领域中的关键问题是价值观掌控问题。作为文化传播的主要组成部分,网络舆情对文化安全的表层和深层结构都有重要影响。本文从文化安全视角下切入,结合新疆高校网络舆情调研,分析了文化安全面临的冲击与挑战,并提出了基于文化安全保障下的新疆高校网络舆情有效管理方式和路径。     

Quantification of projection angle in fragment generator warhead

Tactical Ballistic Missile (TBM) class target neutralization by the fragment spray of a Fragment Generator Warhead (FGW) calls for quantification of fragment projection angle scatter to finalize the end game engagement logic. For conventional axi-symmetric warhead, dispersion is assumed to be normal with a standard deviation of 3⁰. However, such information is not available in case of FGW. Hence, a set of experiments are conducted to determine the dispersion of fragments. The experiments are conducted with a specific configuration of FGW in an identical arena to quantify the scatter and then verified its applicability to other configurations having a range of L/D and C/M ratios, and contoured fragmenting discs. From the experimental study, it is concluded that the scatter in projection angle follows normal distribution with a standard deviation of 0.75° at Chi-square significance level of 0.01(χ²_0.99).     

管道机器人在三通处的通过性分析

三通是管道机器人经常遇到的典型障碍之一,克服该障碍的能力用管道机器人在三通处通过性来描述。文中提出一种描述差压驱动式管道机器人三通通过性的数学模型,该模型由一组组合约束构成。通过对约束方程的分析讨论、与管道机器人弯道通过性的对比分析,得出了规律性的结论。管道机器人在三通处的姿态、单元体的几何尺寸、行走轮结构形式对其通过性都有不同程度的影响。所提出数学模型是管道机器人三通自主行走控制策略设计和相应结构设计的理论基础。     

边坡稳定性理论及其局限性

边坡分析理论经过近几十年的发展,基本形成了完善的体系。较为典型的有 极限平衡法,极限分析法,有限元法等。对各种分析方法做了简要的回顾与评述。基于极限 平衡原理发展的各种分析方法,大多需要做许多假设,同时对岩质边坡又不能很好地考虑其 断层节理特征。有限元强度折减法,是近年来发展起来的一种分析方法,与极限平衡法相比 不需要任何假设,可以求得任意形状边坡的临界滑移面及其对应的安全系数,同时可以反映 边坡失稳及塑性区的发展过程,为岩土体边坡分析开辟了新的途径。