临近空间大型柔性充气囊体结构特性分析*(专题约稿)

以临近空间平流层飞艇柔性充气囊体为研究对象,根据充气结构设计理论对充气囊体结构的最小压差和应力进行计算,建立平流层飞艇充气囊体结构有限元模型,在模型验证的基础上,采用非线性有限元方法对平流层飞艇充气囊体结构特性进行仿真分析,得到了囊体结构在不同压差和吊舱载荷作用下应力和变形分布及变化规律,并分析了结构加强配置对囊体应力和变形的影响,为平流层飞艇结构设计提供技术支撑和参考依据。     

复合战斗部结构参数影响分析

应用AUTODYN仿真软件,对一种复合战斗部方案的EFP成型性能进行了分析,结果表明,相对于传统布局方案,在破片方案更改后改变了药型罩的成型过程,导致EFP形状变差从而降低了毁伤性能。通过对结构参数影响进行分析,提出了优化方案,解决了破片方案调整后EFP的成型问题。     

梁的横向振动频率方程的一般表达式

本文推导出梁的横向振动频率方程的一般表达式。十七种在各种边界条件下的梁的横向振动频率方程均是它的特殊情况。     

潜艇结构强度研究的新近进展

本文从结构材料、结构形式、非线性分析、组合壳体和端盖强度以及结构的减振降噪等方面论述了潜艇结构强度研究的新近进展,并指出了今后的研究方向。     

How to Last Alone at the Top: US Strategic Planning for the Unipolar Era

This article investigates how key actors within the US defence policy community realigned their interests to forge a new consensus on the redirection of US defence strategy following the ‘peace shock’ they faced with the collapse of bipolarity. This consensus centred on the idea that achieving US security in the ‘age of uncertainty’ demanded overwhelming US military power, which was widely interpreted as necessitating military capabilities to fight multiple major theatre wars simultaneously against regional ‘Third World’ adversaries. This helped to preserve many of the principal pillars of US Cold War defence policy through deflecting calls for more radical organisational changes and deeper cuts to defence budgets.     

Dissolution of an Empire: Insights from the İstanbul Bourse and the Ottoman War Bond

During the transformation period of the Ottoman Empire leading to the Republic of Turkey, many conflicts took place between 1918 and 1923. These conflicts interrupted the servicing of the Ottoman war bond. The reimbursement likelihood of this bond was related to the outcomes of First World War and the hostilities. This paper analyses the impacts of First World War and hostilities on the risk assessments regarding the Ottoman war debt, using manually collected data on the price of the Ottoman war bond traded at the ?stanbul bourse between 1918 and 1925. The empirical results imply that the defeat of the Bulgarian army and the peace offer of Austria-Hungary were associated with the increasing premium demanded by investors of the bond. The victories of the Turkish National Movement and the peace offer of the Allies to end the hostilities by 1922 positively affected the likelihood of the servicing of the debt.     

French Arms Exports and Intrastate Conflicts: An Empirical Investigation

The aim of this article is to evaluate how French Major Conventional Weapons (MCW) exports impact on the conflict intensity of recipient countries. The recent increase in French arms exports seems to contradict the French political discourse on the promotion of regional stability. We run zero-inflated ordered probit model in order to analyze the role of the arms trade on the intensity of civil conflicts in 144 countries from 1992 to 2014, using SIPRI and UCDP/PRIO data. Our results suggest that French MCW exports tended not to exacerbate intrastate conflicts during this period. This finding is robust to changes in the empirical framework. We propose two lines of explanations: France seems to be prone to choosing partners that respect human rights and selling more ‘defense-oriented’ MCW than the rest of the world.     

新疆高等教育专业结构与产业结构适应性分析

经济的集约型发展使得教育尤其是高等教育越来越成为推动经济增长的最重要因素之一。为丰富高等教育发展模式、强化其个性和特色、增强与地方经济的联系,高等教育的发展不断提升区域化,即区域高等教育的发展以区域经济社会发展的需要为目标和指导,充分发挥高等教育对地方经济社会建设的推动作用。本文分析了新疆区域高等教育专业结构及经济结构的发展现状,找出二者对接过程中存在的矛盾,提出适应新疆区域经济发展的高校专业结构调整对策。     

地(舰)空导弹弹体结构可靠性分析

对地(舰)空导弹弹体结构可靠性进行了分析,介绍了弹体结构可靠性的工程计算方法,提出了改进弹体结构可靠性的技术途径。     

卫星激光防护技术

从两方面探讨轨道卫星激光防护技术.介绍卫星光电探测器激光防护设计原理及新型防护技术.对提高卫星结构材料的抗激光损伤能力提出几种实用方法.