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71.
20世纪70年代开始的以信息化为本质和核心的世界新军事变革,强化了心理战的时代性、发展性和创新性。信息技术不仅丰富了现代心理战的作战理念,拓展了心理战的作战空间,促进了心理战武器装备的发展,而且使得心理战的作战样式发生了质的变化,强化了心理战的心理刺激效果、心理渗透效果和心理损伤效果。 相似文献
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课件写作系统的功能需求分析与结构选择策略 总被引:1,自引:0,他引:1
本文从“课件工程”的角度出发,对课件及其写作系统的功能需求和结构设计进行了讨论,并介绍了课件写作环境AutoCAI的开发过程和设计策略。 相似文献
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本文对液体火箭发动机烧蚀冷却推力室的冷却机理进行了分析,较为全面地考虑了影响温度场的主要因素,利用六点中心差分建立了离散数学模型,并对室壁温度响应进行了计算,得到了烧蚀速率和侵蚀速率等。所得结果可供设计推力室时参考。 相似文献
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1934年8月,湘赣苏区的主力红军红6军团奉命西征后,国民党军对苏区大举进攻,根据地越来越小,革命力量遭受重大损失.在这危急时刻,原湘赣省苏维埃政府主席谭余保组建中共湘赣临时省委,任省委书记兼组织部长,同时组建游击司令部,任政治委员兼司令员,运用灵活机动的游击战术,领导了湘赣边三年游击战争,同敌人进行了艰苦卓绝的斗争. 相似文献
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We consider an integrated usage and maintenance optimization problem for a k‐out‐of‐n system pertaining to a moving asset. The k‐out‐of‐n systems are commonly utilized in practice to increase availability, where n denotes the total number of parallel and identical units and k the number of units required to be active for a functional system. Moving assets such as aircraft, ships, and submarines are subject to different operating modes. Operating modes can dictate not only the number of system units that are needed to be active, but also where the moving asset physically is, and under which environmental conditions it operates. We use the intrinsic age concept to model the degradation process. The intrinsic age is analogous to an intrinsic clock which ticks on a different pace in different operating modes. In our problem setting, the number of active units, degradation rates of active and standby units, maintenance costs, and type of economic dependencies are functions of operating modes. In each operating mode, the decision maker should decide on the set of units to activate (usage decision) and the set of units to maintain (maintenance decision). Since the degradation rate differs for active and standby units, the units to be maintained depend on the units that have been activated, and vice versa. In order to minimize maintenance costs, usage and maintenance decisions should be jointly optimized. We formulate this problem as a Markov decision process and provide some structural properties of the optimal policy. Moreover, we assess the performance of usage policies that are commonly implemented for maritime systems. We show that the cost increase resulting from these policies is up to 27% for realistic settings. Our numerical experiments demonstrate the cases in which joint usage and maintenance optimization is more valuable. © 2017 Wiley Periodicals, Inc. Naval Research Logistics 64: 418–434, 2017 相似文献
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See Seng Tan 《战略研究杂志》2015,38(3):332-358
AbstractThis paper critically assesses the conceptual utility of smart power to Singapore’s evolving defence and foreign policy and behaviour. First, as a political concept adopted by the United States for its post-Afghanistan strategy, smart power does not travel easily. With qualifications, however, the notion is relevant to Singapore’s policy pragmatism and its emphasis on deterrence and diplomacy. Second, Singapore’s willingness to employ its military assets in disaster relief and peacekeeping arguably hews most closely to smart power’s mix of hard and soft approaches. Third, Singapore’s contributions to global governance, albeit limited, imply a rethinking among its leaders on the place of values in its policy. 相似文献