多样化军事任务装备物资储备模式研究

针对多样化军事任务的特点,分析了其对装备物资储备提出的新要求,并进一步从储备主体、储备形态、储备方式及储备保障等方面提出了多样化军事任务装备物资一体化储备模式．研究结论对加强多样化军事任务装备物资储备体系建设具有积极的指导意义．     

基于AMESim的液压混合动力车辆建模仿真研究

在阐述并联式液压混合动力车辆的结构原理及液压系统参数设计的基础上,利用AMESim创建了整车模型。根据液压混合动力系统的工作特性,以改善车辆燃油的经济性为目标,提出了基于车辆扭矩需求的发动机和液压泵/马达扭矩控制策略。仿真结果表明:该混合动力系统能合理控制扭矩分配,实现不同工作模式的平顺切换,在满足车辆动力性能指标的前提下,有效地提高了燃油的经济性。     

基于Pareto排序法的战时装备维修任务多目标调度方法

针对战时武器装备维修保障问题,建立了包括最大完工时间、延迟时间和维修单元负荷在内的多目标优化调度模型。为提高解的多样性和收敛性,构建了一种基于Pareto排序法和小生境技术相结合的遗传算法用于模型求解,引入Pareto排序和拥挤距离进行适应度计算,通过混沌系统随机生成权重系数,并使用小生境技术改进选择方式。通过实例验证表明,该方法能够有效地解决装备维修多目标调度问题。     

广义逆指数分布元件的可靠性分析

在II型混合截尾样本下,得到了广义逆指数分布未知参数的最大似然估计。利用最大似然估计的渐近正态性构造了参数的渐近置信区间,运用Lindley's逼近方法和TierneyKadane's逼近方法计算出了参数的Bayes估计。最后,运用Monte-Carlo方法对上述估计方法结果作了模拟比较。     

The danger of “hybrid warfare” from a sophisticated adversary: the Russian “hybridity” in the Ukrainian conflict

The term “hybrid warfare” is a new one that the West began to use to explain its failure to cope with asymmetric threats. Focusing on the war on global terrorism, the West temporarily withdrew its attention from traditional adversaries, such as Russia, which has used this gap and has audaciously returned to the stage as a global actor. Until the Russian annexation of the Crimean Peninsula in 2014 and inflaming the Ukrainian crisis, most Western authors attributed “hybrid threats” mostly to non-state actors. But the Ukrainian scenario showed the true face of “hybridity” in the modern battlefield when practised by a powerful state actor. Russian “hybrid warfare” in Ukraine has already been seen as a combination of conventional and unconventional methods, that have been complemented with other instruments of national power – diplomatic, economic and information. The purpose of this article is, through an analysis of the Ukrainian scenario, to demonstrate that although the term “hybrid” is new, the concept itself is old and is a continuation of already seen doctrine from the Cold War era. Although “hybrid threats” can come both from state and non-state actors, the Russian interference in Ukraine is proof that they are especially dangerous for the West if, or when, they are initiated from a traditional, sophisticated adversary that has the capacity to use all forms of warfare.     

混合电推进能源管理系统模糊逻辑控制

针对混合电推进能源管理方法开展研究,设计了一种基于模糊逻辑控制的混合电推进能源管理系统。通过设置垂直起降飞行器的功率要求、内燃机-发电机输出功率和储能电池荷电状态的模糊隶属度函数,动态最优分配发电机与储能电池的功率输出,从而提升系统的燃油经济性与飞行器的航程。结合模型设置,对100 kg级的垂直起降转平飞的飞行器能源系统变化进行仿真计算,验证了能源控制算法的可行性。结果表明：基于模糊逻辑控制的能源管理方法,在总时长约为1.2 h的飞行过程中,内燃机约有1 h的时间工作在比油耗最低的区域,从而提升了混合电推进系统的能量利用效率。研究为后续混合电推进系统的能源高效控制与管理提供了设计思路和分析方法。     

近空间飞行器固体火箭助推器/助推弹道总体设计优化

研究一种近空间飞行器的固体火箭助推器/助推弹道总体优化问题.在选定喷管构型、推进剂、壳体材料、绝热层材料及药柱结构的前提下,建立包含热力学分析与计算、质量分析与计算、气动力分析与计算和弹道设计与计算的系统分析模型,采用一种基于可行性规则与结合模拟退火的混合粒子群优化算法求解最优解.优化结果表明建立的系统分析模型和采用的...     

Modern Irregular Warfare: The ISIS Case Study

ISIS (the Islamic State of Iraq and Syria) has become a key political and military actor in the Middle East and in North Africa. This essay aims at outlining ISIS warfare through an analysis of its operations in the frame of hybrid warfare theory proposed by Frank Hoffman. Therefore, the paper deals with: the role of terrorist tactics in ISIS warfare and the relationship between terrorism and insurgency; ISIS use of technology, mainly with regard to suicide attacks and to drones; and the relevance of urban warfare. Finally, the paper highlights how ISIS operates and the most threatening features of its warfare.     

基于混合优化的前馈—反馈复合控制器最优设计

为了解决传统PID控制器在电动舵机系统设计中难以满足控制要求的问题,首先设计了一种规范化前馈-反馈控制系统,然后利用混沌优化算法和共轭梯度方法相结合的混合优化算法对前馈-反馈控制器参数进行了优化.仿真结果表明:基于混合优化算法的前馈-反馈控制器具有很好的动态和静态性能,增强了系统的稳定性和鲁棒性,降低了学习参数选择的盲目性和对经验的高度依赖性.     

混合推理在某型雷达故障诊断中的应用

传统诊断方法各有优缺点,对于大型装备的故障诊断来说,由于故障的复杂性、故障信息的多样性,单一的诊断方法满足不了实际应用的要求。为此,在介绍基于案例、模型、神经网络专家系统诊断推理方法的基础上,论述了基于案例、模型和神经网络的混合推理策略,给出了建立混合推理系统的方法,并在某型雷达的故障诊断系统中得到了应用。