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891.
随着互联网对现实世界的影响越来越大,战略地位越来越突出,获得网络主导权、占据网络制高点成为各国竞相努力的目标。美国在全球网络管理、网络技术、网络文化、网络军事等方面处于霸主地位。美国网络霸权对中国的政治安全、信息安全、文化安全、军事安全造成了极大的威胁。中国应综合采取各种措施,应对美国网络霸权的冲击和挑战,维护国家安全和利益。 相似文献
892.
研究一类具有饱和发生率的离散型SIS传染病模型,得到了模型的基本再生数.通过线性化的方法,运用LaSalle-Lyapunov定理,证明当基本再生数R01时,无病平衡点是全局渐近稳定的;通过迭代的方法,证明当基本再生数R01时,地方病平衡点是全局渐近稳定的. 相似文献
893.
894.
We consider two regression models: linear and logistic. The dependent variable is observed periodically and in each period a Bayesian formulation is used to generate updated forecasts of the dependent variable as new data is observed. One would expect that including new data in the Bayesian updates results in improved forecasts over not including the new data. Our findings indicate that this is not always true. We show there exists a subset of the independent variable space that we call the “region of no learning.” If the independent variable values for a given period in the future are in this region, then the forecast does not change with any new data. Moreover, if the independent variable values are in a neighborhood of the region of no learning, then there may be little benefit to wait for the new data and update the forecast. We propose a statistical approach to characterize this neighborhood which we call the “region of little learning.” Our results provide insights into the trade‐offs that exist in situations when the decision maker has an incentive to make an early decision based on an early forecast versus waiting to make a later decision based on an updated forecast. © 2014 Wiley Periodicals, Inc. Naval Research Logistics 61: 532–548, 2014 相似文献
895.
Benjamin Deruelle 《Small Wars & Insurgencies》2014,25(4):754-766
The first conceptual, theoretical treatises about small war (la petite guerre) as special operations appeared only from the middle of the seventeenth century. The term is not used in the eighteenth-century sense of ‘special operations’ in older sources. The supposed absence of any treatment of the subject is surprising considering the obsession with the ‘art of war’ in the Renaissance, but other authors attribute it to a supposed antinomy between chivalric ideals and irregular warfare. But the absence of explicit manuals on the subject is not evidence of absence of advanced reflection on this kind of operations in the Middle Ages and in Early Modern times. We should thus look elsewhere, in other genres, for writings that contain and pass on military knowledge. Epics, romances, educational and military treatises, and memoirs in fact contain elements of a theory of special operations, even though these genres differ from our conception of rationality inherited from the Enlightenment. 相似文献
896.
针对车载捷联惯导(SINS)在外部传感器失效时无法实现动基座对准的问题,提出了基于车辆运动模型辅助的动基座对准方法。与传统方法不同的是,该方法利用车辆在路面上的运动特性,利用车辆运动模型测得的虚拟观测量来提供辅助信息,从而实现SINS的动基座对准,仿真结果表明:对于中等精度惯导,在外部传感器失效时,利用车辆运动模型提供的辅助信息,水平对准精度为0.37°,方位对准精度为5.86°,对准时间小于150 s,依然能够快速有效地实现动基座对准。 相似文献
897.
Charles Esdaile 《Small Wars & Insurgencies》2014,25(4):814-827
The Spanish Guerrilla (1808–1812) which has given its name to ideologically motivated insurgencies is usually portrayed as a patriotic uprising against the French occupation forces of Napoleon. It was that, in part, but also many other things besides. This case study illustrates its overlap and convergence with banditry but also with social unrest turned into uprisings directed by poor Spaniards against their creditors, as in the storming of Ronda by insurgents in 1810. From the propaganda of the day to the subsequent Spanish patriotic historiography, there has been a tendency to exaggerate the amplitude of events and also the damage that was done to the French forces and the casualty figures inflicted on them. 相似文献
898.
899.
潘樱心 《中国人民武装警察部队学院学报》2014,(9):26-29
情报主导警务已成为继社区警务之后的新工作模式。但在实际的公安边防工作中,情报主导警务的推广并不能完全取代社区警务。为此,在比较美国情报主导警务与社区警务模式的基础上,分析了情报主导警务与社区警务结合的必要性及紧迫性,重点探讨在公安边防工作中情报主导警务与社区警务优势相结合的途径。 相似文献
900.
在组件化建模与仿真领域内,基于BOM规范的组件建模与仿真环境KD-SmartSim得到了广泛应用,它通过RTI实现了组件仿真系统的并行运算,但是其运行性能较低.讨论了KD-SmartSim系统存在的不足,在继承其基于BOM规范组件建模的基础上,提出了新的支持组件并行化计算的结构,设计了SPMD运行模式的并行组件仿真引擎... 相似文献