基于计算机三维建模技术的两栖车辆静水性能计算

为了解决传统静水性能计算中倾斜浮态下浮心计算困难的问题,建立了两栖车辆的三维实体模型,研究了任意浮态下浮心的计算方法。在此基础上,求解了两栖车辆在静水平衡时的浮态,并利用SolidWorks提供的API函数进行二次开发,实现了计算的自动化。经实例验证表明,该算法准确、快速。     

The ligaments of counter-terrorism regime: sexual violence and the vicarious traumatisation of female non-governmental organisation workers: evidence from Nigeria

ABSTRACT

There is a dearth of studies on indirect victims of sexual violence in counter-terrorism efforts. Using Nigeria as a case study, this paper argues that global and state-level counter-terrorism policies have generally failed to account for the psychological effects of the engagement of female NGO workers in counter-terrorism operations or mitigating the effects of terrorism in conflict zones. Specifically, there has been an increase in sexual violence perpetrated by some members of the security agencies involved in counter-terrorism operations in North-eastern Nigeria. As a result, female NGO workers carry out Medicare, psychosocial counselling and advocacy for these victims. Female NGO workers become exposed to the trauma of victims of sexual violence, which affects their mental health and thus performances in counter-terrorism activities in the country. This altered their worldview on issues of safety even among secured locations or among the presence of security agents and reinforced feelings of powerlessness.     

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.     

六相无刷直流电动机谐波转矩的分析与计算

无刷直流电动机具有诸多优点,但运行中仍然存在转矩脉动问题.分析了六相无刷直流电动机的工作原理,推导了六相无刷直流电动机的状态方程,采用状态变量法对电机转矩产生的关键量--反电势波形和电流波形进行了仿真和试验研究,对六相无刷直流电动机的谐波转矩进行了分析和推导,得出了通过减小电流滞后角可控制甚至消除正弦谐波脉动转矩的结论.     

双模量子态在原子介质中的存储

从四能级暗态极化子出发,讨论双模量子场与原子介质的信息转换过程以及2信号场之间的信息转换过程。利用双-Λ型四能级原子系统,可以存储双模量子态(包括一些纠缠态),从理论上解释了双模量子信息在介质中的"写入"和"读出"过程。提供了双信号场存储的实验方案。     

发动机隔热缸套热强度有限元分析

针对低散热发动机存在的热负荷状况,分析了非稳态导热有限元计算的特点:运用经验公式求出了发动机燃烧室部件燃气侧的传热边界条件;运用有限元法对隔热部件进行了热强度分析。计算结果表明:热负荷和热应力增大是造成隔热件可靠性降低的主要因素之一。