Investigate the effects of magnetic fields on the penetration ability of a shaped charge jet at different standoffs

The influence of a magnetic field on the stability of a shaped charge jet is experimentally investigated at standoffs of 490, 650 and 800 mm. The experimental results without and with the magnetic field are compared in terms of the shaped charge jet form, stability and penetration ability. A theoretical model based on one-dimension fluid dynamics is then developed to assess the depth of penetration of the shaped charge at those three standoffs and magnetic conditions. The results show that the penetration capability can be enhanced in more than 70% by the magnetic field. The theoretical calculations are compared with the experimental results with reasonably good correlation. In addition, the parameters introduced in the theory are discussed together with the experiments at three standoffs studied.     

某供弹机构现存问题动力学分析及参数优化探讨

介绍了环形杠杆供弹机构的工作原理及其在实际使用中常见的问题,建立了机构的动力学模型,对模型进行动态求解,模拟了机构的工作过程。借助求解结果,针对问题产生的原因进行了动力学分析,在理论上找到了问题产生的根源。在此基础上建立了机构的最优化数学模型,给出了优化方案,最后对优化方案和现有结构进行了比较。     

过程方法在防化科研质量管理系统中的应用

介绍了根据国军标要求建立的科研质量管理系统．运用“过程方法”,对现行科研体制下的科研进程进行了识别,并提出了具体的控制要求。     

Si3 N4基复相陶瓷天线罩材料的制备及性能

基于高马赫数导弹天线罩为应用背景,以Si粉、BN粉、SiO2粉为主要原料,采用反应烧结法制备Si3N4基复相陶瓷材料,探讨了原料组成、成型工艺及坯体密度对材料性能的影响。试验结果表明:当原料中Si、BN和SiO2分别为55%、30%和10%时,材料强度可达96.7MPa,断裂韧性可达1.80MPa.m1/2。同时材料具有良好的介电性能及热物理性能。     

论军队院校科研管理资源配置机制建设

分析了目前军队院校科研管理资源配置机制中存在的问题及原因,提出了军队院校建立科学高效优化合理的科研管理资源配置机制的基本思路:建立基于学科的资源优化配置机制;建立和完善资源开放平台和共享机制;建立尊重和适应市场规律、科学合理的人才资源配置机制。     

“课后记”点滴谈

“课后记”是常规教学中的重要一环,它对探索教学规律,提高教学艺术,积累教学经验,提高教学质量,都有积极的作用。本文就“课后记”的好处、内容及写“课后记”时应注意的问题进行了探讨。     

氧化钨薄膜电致变色机理的探讨

研究磁控溅射生成的氧化钨薄膜处于电解液系列中的循环伏安特性,充电电流及光学特性.采用配体场理论来解释氧化钨薄膜在电场作用下,锂离子注入引起薄膜变色的现象,认为注入的锂离子破坏了薄膜界面层内氧化钨分子的八面体结构的对称性,在内部静电场和外部电场的共同作用下,钨离子d轨道的五重简并能级分裂,从而使得薄膜对可见光产生d-d吸收,导致氧化钨薄膜变色.     

面向决策的一体化建模方法及其在兵力筹划中的应用

在对军事决策问题的主要特点进行分析的基础上,提出从军事概念模型到数学模型再到定性推理模型的一体化建模思想.以空军航空兵遂行直接航空火力支援任务为想定背景,根据EATI模板,利用基于UML的Rose工具依次对想定任务的实体、任务、交互等进行分析;对于兵力筹划中的结构化问题建立了机会约束多目标规划数学模型;对于非结构化问题则构造了推理机,推理机体现了定量与定性相结合的决策分析思想.最后,以一个实例验证文章思路的可行性.     

OPTING OUT OF THE IRON TRIANGLE

Between the 1960s and the 1990s, the US chemical industry went from lobbying against the Geneva Protocol and promoting increased funding for chemical warfare to refusing to produce binary chemical weapons and assisting with the negotiations of the Chemical Weapons Convention (CWC)—even though the treaty included provisions that could be costly to industry. What happened in those thirty years to make the US chemical industry reverse its position on chemical weapons? This article argues these changes were largely caused by the chemical industry's desire to reform the negative public image it had acquired due to its involvement in the Agent Orange scandal and other high-profile incidents during the 1970s and 1980s. The chemical industry's assistance with CWC negotiations may be explained after an examination of the US public policy literature, which argues that industry will support apparently costly regulations if doing so helps it repair a damaged public image and ensures greater profits in the long run.     

Deterrence in the Gulf War

A recently published collection of captured Iraqi records offers an opportunity to better understand Saddam Hussein's perception of US and Israeli deterrence signals, affording innovative insights into the reasons behind Iraq's restraint from using weapons of mass destruction against Israeli targets during the 1991 Gulf War. This article tests a wide range of suggested hypotheses, and suggests that US and Israeli deterrence played only a minimal role in dissuading Iraqi use of WMD. The article concludes with some thoughts on the practical implications, particularly on the effectiveness of a “no-first-use” nuclear policy.