弹丸初速对磁阻型线圈发射器发射性能的影响分析

通过设置弹丸初速并研究其对单级磁阻型线圈发射器发射性能的影响,模拟分析前一级线圈弹丸出口速度对后一级线圈发射性能影响的规律;利用Ansoft有限元仿真软件进行了动态仿真,得到弹丸初速对单级磁阻型线圈发射器驱动电流、驱动线圈感应电压、电磁力、弹丸出VI速度、弹丸位移及能量转换效率等影响的规律．研究表明：弹丸初速越大,经过单级线圈加速后弹丸出口速度也越大,但弹丸出口速度增量减小;随着弹丸初速增大,能量转换效率呈现先增大后减小的趋势．     

ACQUIRING FOREIGN NUCLEAR ASSISTANCE IN THE MIDDLE EAST

The United Arab Emirates (UAE) has laid out an ambitious plan to become the first Arab country to possess a civilian nuclear energy program. Central to that effort has been the Emirati government's ability to obtain foreign nuclear assistance. This article traces the UAE's strategies for overcoming the obstacles that stood in the way of nuclear suppliers providing assistance. It examines the approach taken by the UAE to assuage the safety and security concerns of nuclear suppliers, how the UAE leveraged its alliances with France and the United States to obtain their cooperation, and its strategies for engaging domestic interest groups in supplier states. The generalizable elements of the UAE's strategies are discussed and used to provide insight into the prospects for other Middle Eastern states' bids to obtain similar assistance. The article concludes with a discussion of the potentially transformative aspects of the strategies employed by the UAE in shaping other countries' pursuit of nuclear energy in the region.     

TURKEY'S NUCLEAR COMEBACK

As worries have grown about global warming and the sustainability and price of fossil fuels, the demand for nuclear energy has increased, and nuclear power is increasingly viewed as a reliable and clean resource. However, the so-called nuclear renaissance coincides with an international security environment in which the norms of nuclear nonproliferation seem to be eroding. Turkey, a non-nuclear weapon state, plans to generate nuclear power to meet future energy demands, but it is aware of and concerned with regional proliferation trends. Questions have also been raised regarding Ankara's rationale for using nuclear energy, as well as its potential motivations and capabilities regarding future proliferation. This article will provide an overview of Turkey's nuclear energy history and plans, as well as the proliferation-related questions that could arise; it will also look at the domestic debate on nuclear energy and Turkey's status as a non-nuclear weapon state.     

The Importance of Safeguards Culture

International safeguards is the system of measures put in place by the International Atomic Energy Agency and states to ensure nuclear programs remain dedicated to peaceful purposes. This international safeguards system consists of agreements, inspections, and evaluations that have never considered the safeguards culture of a state or facility. Neither a common definition nor an understanding of safeguards culture is internationally recognized. This article provides an analysis of the concept of safeguards culture and gauges its value to the international safeguards community. The authors explore distinctions among safeguards culture, safeguards compliance, and safeguards performance, and suggest possible indicators of safeguards culture and methods to promote a strong, positive safeguards culture.     

中小型化工企业消防安全问题研究

针对中小型化工企业的生产特点,分析了生产过程中存在的消防安全问题,并从提高安全意识、落实安全生产责任制、严格安全操作、加强消防安全管理和监督等四个方面提出了针对性的火灾事故预防措施。     

移动式铁路油罐车清洗装置水循环使用与节能分析

装备节能研究对建设绿色节能型社会具有重要意义。对移动式铁路油罐车清洗装置中清洗管路和吸污管路的热损进行分析计算,提出了水掺混循环使用的节能清洗方案,对清洗工艺中的传热过程、水循环使用中水掺混比例进行了详尽的分析计算,并对节能效果进行了分析。结果表明,清洗管路系统热损较低,水掺混循环使用的节能效果明显。     

国家能源供给对军队后勤建设的影响研究

军队后勤建设离不开国家能源供给,军队能源储备、军事训练、国防工程、科研试验以及日常生活等方面均与国家能源供给有着密切的关系。探讨了国家能源供给对军队后勤建设的影响内容,分析了国家能源供给对军队后勤建设的影响,提出了确定国家能源供给对军队后勤建设影响的方法步骤。     

基于激光雷达的高炉回旋区深度探测研究

炼铁高炉回旋区深度的直接探测存在较大困难,提出了一种基于激光雷达的回旋区边缘探测方法。探测得到的回波信号存在较大噪声干扰,为提取边缘回波信号,首先对噪声特点进行分析,判明噪声包括白噪声和1/fγ非平稳随机噪声;由此采用多小波平移不变算法进行滤波处理;采用H ilbert-Huang变换对滤波后的信号进行处理,对其瞬时能量进行分析。由于回旋区边缘表现出较为强烈的局部能量,从能量谱中可较好地提取回旋区边缘信号。试验表明,采用激光雷达探测回旋区的深度,能较为真实地反映高炉回旋区的真实状态,其值较计算建模方法更可靠。进一步的研究可望得到回旋区的二维或三维形貌。     

化学危险品运输车辆应防火灾爆炸事故

本文通过具体案例分析了化学危险品运输车辆可能发生火灾爆炸事故的原因,并提出了应采取的安全措施。     

华东烧结模型的数学计算(Ⅱ)

通过热力学分析和数学计算,讨论颗粒呈现面心立方堆积方式时,华东烧结模型中膨胀机制和收缩机制对烧结体总表面能的作用和总孔隙度比变化的影响,计算表明烧结过程中收缩机制占主导地位。