多级电磁线圈发射器时序触发控制策略

为优化多级同步感应线圈电磁发射器性能,以提高发射速度和能量转换效率为检验指标,以影响上述指标的触发时序为优化对象,采用遗传算法建立单级同步感应线圈型电磁发射器触发位置优化数学模型,计算最佳触发位置,通过数值和有限元两种仿真系统对优化结果的正确性进行验证。采用该方法对两级以及十级同步感应线圈型电磁发射器的触发时序进行优化研究,并进行仿真验证。为解决仿真系统误差问题,提出采用动子线圈在各级的触发位置和速度作为控制因素的双控触发方式,并研究分析仿真过程中触发开关的随机抖动对出口速度误差的影响,得到最佳触发时序控制策略。     

BOM技术在复杂电路虚拟维修系统中的应用

给出了电路虚拟维修的定义，在复杂电路虚拟维修系统结构的基础上提出了建模需求，并给出了计算模型和交互模型的定义。以形式化的方法定义了BOM（Base Object Model）概念模型，通过分析电路仿真的特点，确定了电路BOM概念模型中的实体类型、事件类型和交互模式；特别是采用了“将实体类型区分电子元件类型和电信号类型，分别以客观属性和仿真语言描述的方法进行定义”的原则，既满足了仿真效果，又简化了建模复杂性。通过建立某型装备的复杂电路虚拟维修训练系统，验证了基于BOM的交互模型的有效性和实用性。     

一类非完整系统的输出反馈控制问题研究

针对一类具有虚拟控制方向和非线性不确定项的非完整系统,研究了其输出反馈控制器的设计问题。采用状态转换技术和反推方法,设计了只依赖于输出值的输出反馈控制器。同时为了处理初值为零的情况,提出了基于第一个子系统输出值的切换控制策略,通过仿真算例说明了控制器的有效性。     

The strategic purpose of individual augmentee officers for junior partners in multinational military operations

ABSTRACT

This article examines the strategic purpose of Individual Augmentee Officers (IAOs) for junior partners in multinational military operations through an exploratory case study of Danish IAOs in Iraq and South Sudan between 2014 and 2017. IAOs are individual officers who are moved from their normal functions to be seconded to other units of the armed forces of their own or another country or an international institution. The study concludes that IAOs function as strategically important, yet not necessarily indispensable, supplements to military contingents in several ways: making tangible contributions to the overall mission (contributing), gaining access to information, knowledge, and experience (learning), and lobbying decision-making processes within mission headquarters (lobbying). The usefulness of IAOs depends on whether the junior partner has specific interests and a significant presence in the theatre and whether the mission is conducted as a UN mission, a NATO mission, or an ad hoc coalition.     

虚拟样机在装备性能仿真和评估中的应用

说明了机械系统动力学研究的必要性 ,阐述了虚拟样机的特点。在分析火炮后坐部分的主要受力的基础上 ,首次将 ADAMS应用到武器装备研究领域 ,结合 Fortran语言编程 ,在 ADAMS平台上建立了火炮虚拟样机。在此基础上 ,将虚拟样机仿真方法和传统建模方法进行了对比 ,克服了火炮传统建模方法中“对称、平面、静平衡”假设的缺陷 ,进一步证明了将ADAMS引入武器装备领域仿真研究的可行性。最后 ,提出了火炮动态性能分级评估方案 ,定义了故障评判函数的概念 ,并对虚拟样机的应用前景进行了展望。     

US grand strategy and the origins of the developmental state

ABSTRACT

Scholars have credited a model of state-led capitalism called the ‘developmental state’ with producing the economic miracles of Japan, South Korea, and Taiwan. This article examines how the developmental state was shaped by the Cold War. US grand strategy focused on accelerating economic development among allies that were under the greatest threat from Communist China and North Korea. American aid agencies became involved in the process of state-building in Japan, South Korea, and Taiwan and supported economic planning. I verify this claim by contrasting US policies on Taiwan with US policies in the Philippines, which faced a weaker Communist threat.     

虚拟环境下某型迫击炮自动机故障预测仿真分析研究

在对某迫击炮自动机的结构组成和机构动作分析的基础上,应用ADAMS软件建立了该武器自动机的虚拟样机模型,并结合实验数据和理论数据对自动机连发射击仿真结果的对比,验证了虚拟样机的正确性。以虚拟样机为工具,对自动机常见故障的影响因素进行了仿真分析和计算,为该武器的故障预测提供了理论依据和数据支持。     

A nation-in-the-making,in arms: control of force,strategy and the Ukrainian Volunteer Battalions

At the core of waging war and strategy is the creation, control and use of force. This article investigates the volunteer battalions that mobilized in Ukraine during the spring of 2014. It contextualizes the volunteer phenomenon and focuses on the state strategies to establish control over these militias. As ambiguous entities arising from a situation characterized by rapid social change – revolution and war – the volunteer battalions threatened existing hierarchies and questioned state authority. The situation was exacerbated by the war, which deviated from the expectations of Ukrainian combatants and Western military observers alike. The state nevertheless enjoyed a modicum of success in reining in the militias through four strategies of undermining, co-option, incorporation and coercion. While predominantly integrated into a more rigid category of paramilitary forces, the volunteers continue to play a role in both the Ukrainian society and security sector to the unforeseeable future.     

From show of force to naval presence,and back again: the U.S. Navy in the Baltic, 1982–2017

This article discusses roles and missions of the United States Navy with a particular focus on the Baltic Sea. That particular sea has gained renewed political and military attention following Russia's resurgent and increasingly hybrid-offensive foreign policy. Baltic nations, uncertain of what the future holds, ought to look at sea power and maritime missions in the Baltic, as well as US naval presence in Europe, to draw lessons for future posture.     

一种传感器网格自协同作战模型*

传统的协同技术不能满足传感器网格复杂的协同应用在动态性、实时性以及分布决策的强协同等方面的需求。为此,建立了一种自协同技术,给出了自协同作战虚拟组织(ACBVO)的参量化描述,提出了传感器网格自协同作战模型(SGACBM),描述了协同成员的信息结构和功能结构。使用SGACBM,ACBVO能在执行任务过程中,不断监测协同工作的质量,并根据协同质量动态切换协同机制。SGACBM能改善传感器网格的协同质量,加速作战进程,实现传感器网格自协同作战。