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排序方式: 共有194条查询结果,搜索用时 31 毫秒
61.
以武器装备作战能力差距为牵引,以全寿命周期阶段对作战能力的影响为主要依据,建立了基于系统动力学的武器装备全寿命费用控制分析模型,客观、合理地描述了全寿命周期各阶段之间的相互影响,并对武器装备全寿命费用宏观费用控制问题进行了仿真实验分析。 相似文献
62.
为了得到合适的"计算机实验"的"试样"进行固体炸药冲击起爆现象的分子动力学研究,对REBO模型进行了NVE,NVT两种平衡态分子动力学模拟;作为对比,同时还进行了不施加任何人工干预,系统的演化完全由运动方程驱动的分子动力学模拟,讨论了根据对"试样"的不同要求选择适当模拟方法的原则。 相似文献
63.
陈友谊 《中国人民武装警察部队学院学报》2006,22(4):40-41,46
中国维和警察防暴队在维和任务区开展群众工作,是维护当地局势稳定和执行联合国宪章的需要。应本着尊重当地民风民俗的原则,从做好宣传工作入手,传播进步、文明的生活方式,严格遵守群众纪律,爱护当地民众的财产,维护当地民众的利益。 相似文献
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针对新一代航空飞行器在大攻角飞行时大气数据系统测量精度严重下降问题,提出了基于卡尔曼滤波的大气参数修正算法。该算法利用大气数据测量信息和惯性导航信息,基于飞行器力学方程构建卡尔曼滤波器,通过卡尔曼滤波的方法实现对大气参数的修正。仿真结果表明,经卡尔曼滤波修正后的大气参数能够有效消除大攻角下原始大气参数的剧烈波动性误差,并与真实大气参数吻合较好,有效的提高了大气数据系统在大攻角飞行状态下的测量精度和可靠性。 相似文献
67.
The past decade has seen substantial shifts in Swedish security policy and major change in the domestic debate about NATO. For the first time, all of the right-of-centre “alliance parties” are calling for a full NATO membership, and popular support for NATO has increased. Yet public opinion contains ambiguities and paradoxes that complicate the picture. At the same time as support for NATO has increased, the public is overwhelmingly for continued military non-alignment. Drawing on previous research, longitudinal data from national surveys, and other sources on defence and security issues, this article aims to increase our understanding of the development and change in Swedish public opinion on NATO. A key argument is that Erving Goffman’s theatre metaphor, combined with neo-institutional decoupling theory, to a large degree can help understand the public opinion paradox. 相似文献
68.
Michael S. Curl 《Arms and Armour》2019,16(1):27-55
Despite the lance’s status and the amount of attention the couched lance has received in historiography, study of its martial art has been neglected. The various lance types and techniques used by western European cavalry have only recently begun to receive scholarly attention. Additionally, Medieval European lance use has too often been studied in isolation, without an adequate understanding of the idiosyncratic and asymmetrical dynamics of mounted combat. Although the charge with the couched lance was a valid tactic, it was only one of many. Light and heavy lances were used in one hand or two to trip, block, unhorse, and wrestle. These techniques were governed by the harsh laws of distance, speed, impact, iron, and asymmetry. By utilizing the surviving Fechtbücher and several Peninsular and Near Eastern sources, a brief foray into the diverse techniques of lance use and their purposes has been attempted here. 相似文献
69.
无扰载荷航天器中非接触式作动器反电动势会引起有效载荷模块与支持模块之间的耦合,影响有效载荷模块的精确定向性能。通过建立无扰载荷航天器的耦合动力学模型,分析非接触式作动器反电动势对有效载荷模块精确定向性能的影响。考虑六支杆立方构型无扰载荷接口,结合拉格朗日方程和牛顿欧拉方法建立有效载荷模块平台动力学模型。推导非接触式作动器的输出力模型,并引入有效载荷模块平台动力学模型,给出考虑非接触式作动器反电动势的耦合动力学模型。将支持模块上飞轮动静不平衡引起的谐振作为干扰力矩,建立了无扰载荷航天器在轨定向状态的Simulink仿真模型。仿真结果表明,反电动势系数越大,干扰力矩对有效载荷模块的影响越大,有效载荷模块精确定向精度越低。 相似文献
70.
《防务技术》2020,16(3):530-534
Firearm shooting simulators are effective means for training the personnel in armed forces, police and shooting athletes. Shooter–weapon is a complex biomechanical system, therefore the best training quality is achieved when the process of a weapon shot is reconstructed in a training simulator and its training weapon mimics the (feeling) perception of the real weapon usage. Dynamics of motions of a handgun simulator held in the hand of a shooter by its grip during the shot is analysed theoretically and experimentally. Breech lock mechanism of the simulator is actuated pneumatically by supplying compressed air in pulses from external pressure source. Analysis of the obtained simulation results and experimentally recorded motion parameters of the training weapon body reveals that application of pneumatic drives is a reasonable option to simulate recoil perception of a pistol. 相似文献