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一种用于舰船推进的80000轴马力闭式循环氦透平推进装置的初步设计已经完成。研究了几种烧油的加热器和动力转换装置,并在综合分析装置的性能、部件的尺寸和重量特性(这些特性应保证所选定的舰型具有最大有效负载能力)的基础上选择了基准装置。根据综合计算机程序,并结合过去的大量设计经验,进行参数设计,且在此基础上作出主要部件的初步设计。作出了推进发动机的初步设计图,同时提出了适用于高速驱逐舰的推进装置初步布置方案。分析表明,这种类型的推进发动机用作轻型舰船推进装置,估计不会发生重大的组装问题。 相似文献
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长期以来,我国同防动员的主要功能定位于战时应战.当前和今后一个较长时期,大规模战争威胁基本可以排队,非传统安全威胁日益凸显,加强非战争军事行动应急动员建设,是新的历史使命赋予国防动员系统的重要职能.我们必须立足现有条件,自觉增强抓好应急动员建设的事业心和责任感,努力做好以下几个方面的工作. 相似文献
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5 多传感器数据融合体系结构 在开发多传感器数据融合系统时,一个关键问题是在数据流程中实际组合式融合数据的地点问题。对第一级融合重点我们将放在两种情况上:(1)测定运动对象位置和速度的定位信息(如观察到的距离、方位角和高低角)的融合;(2)测定被观测对象身份的参数数据(如雷达截面积、红外谱等)的融合。尽管在一个实际的系统中,定位和参数身份信息的融合可以综合完成,我们还是分别讨论这两种情形。 在融合定位信息以测定对象的位置和速度时主要有三种方法供选择:(1)融合原始 相似文献
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美国研制反坦克新武器——炮管发射的反坦克“灵巧弹药” 总被引:1,自引:0,他引:1
为了对抗华沙条约军队在中欧部署的数量庞大而且日益增多的装甲车辆,美国正在努力推行一整套研制发展计划,以期研制成一系列的第三代反装甲武器。常规的炮兵不具备在这距离上有效摧毁坦克的火力,除了采取面射击的方法并使用空炸破片弹外,也没有能力从坦克的顶部(那里防护装甲较薄)实施攻击。这就意味着传统上要依靠空中力量去破坏敌坦克的集结,特别是在对付远在前沿阵地之后的坦克集结力量时更是如此。然而,飞机是容易遭 相似文献
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古希腊著名的哲学家柏拉图(公元前427—前347年)对客观存在的人生问题范围之外的哲理观念进行了深入的研究。因此,他不可避免地会遇到诸如战争与和平这类概念,并阐发其对战争与和平问题的看法和认识。 相似文献
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Chemical warfare agents (CWA) are stockpiled in large quantities across the globe. Agents stored in inaccessible facilities need to be destroyed rapidly without dispersing the compounds to surrounding areas. Metal-based energetic formulations are used in such prompt defeat applications to rapidly decompose the CWA by generating a high temperature environment. An alternate, and possibly a more effective decomposition pathway could be provided by chemicidal action of aerosolized condensed combustion products, which typically consist of metal oxides. Toxic fumes that escape the high tem-perature blast zone can be neutralized by smoke generated during combustion, depending on the par-ticle size, surface characteristics, chemical properties, and concentration of this smoke. This review considers relevant experimental and modeling studies quantifying decomposition of CWA comprising organophosphorus compounds and their surrogates on the surface of various metal oxides. Dimethyl methylphosphonate (DMMP), a sarine surrogate, was used most commonly for such experiments. Many reported efforts focused on the mechanisms of adsorption of DMMP to various metal oxides and initial reaction steps cleaving various bonds from the chemisorbed molecules. For selected oxides, these ex-periments were supported by quantum-mechanical calculations. In other studies, the capacity of oxide surfaces to adsorb and decompose DMMP was quantified. In most cases, porous catalysts were used although limited experimental data are available for aerosolized nonporous oxide particles. The reported experimental data applicable to scenarios involving prompt decomposition of CWA are summarized. It is noted that information is lacking describing respective heterogeneous reaction kinetics. Preliminary estimates of aerosolized smoke particle concentrations required to destroy CWA are made considering gas phase diffusion rates and reported values of the oxide capacity to decompose CWA or their surrogates. 相似文献