训练模拟器总体设计技术及应用

训练模拟器的研制要求的模拟逼真度高,能完成主要操作训练,同时要结构简单、成本低。由于新型武器系统技术含量较高,操作较为复杂,训练模拟器研制周期较短,顶层设计至关重要。本文从总体的角度论述了训练模拟器的功能、结构、关键技术等设计方面的问题。     

Supply chain coordination with product line design and a revenue sharing scheme

Many manufacturers sell their products through retailers and share the revenue with those retailers. Given this phenomenon, we build a stylized model to investigate the role of revenue sharing schemes in supply chain coordination and product variety decisions. In our model, a monopolistic manufacturer serves two segments of consumers, which are distinguished by their willingness to pay for quality. In the scenario with exogenous revenue sharing ratios, when the potential gain from serving the low segment is substantial (e.g., the low‐segment consumers' willingness to pay is high enough or the low segment takes a large enough proportion of the market), the retailer is better off abandoning the revenue sharing scheme. Moreover, when the potential gain from serving the low (high) segment is substantial enough, the manufacturer finds it profitable to offer a single product. Furthermore, when revenue sharing ratios are endogenous, we divide our analysis into two cases, depending on the methods of cooperation. When revenue sharing ratios are negotiated at the very beginning, the decentralized supply chain causes further distortion. This suggests that the central premise of revenue sharing—the coordination of supply chains—may be undermined if supply chain parties meticulously bargain over it.     

Energy‐efficient scheduling for sustainable manufacturing systems with renewable energy resources

Environmentally friendly energy resources open a new opportunity to tackle the problem of energy security and climate change arising from wide use of fossil fuels. This paper focuses on optimizing the allocation of the energy generated by the renewable energy system to minimize the total electricity cost for sustainable manufacturing systems under time‐of‐use tariff by clipping the peak demand. A rolling horizon approach is adopted to handle the uncertainty caused by the weather change. A nonlinear mathematical programming model is established for each decision epoch based on the predicted energy generation and the probability distribution of power demand in the manufacturing plant. The objective function of the model is shown to be convex, Lipchitz‐continuous, and subdifferentiable. A generalized benders decomposition method based on the primal‐dual subgradient descent algorithm is proposed to solve the model. A series of numerical experiments is conducted to show the effectiveness of the solution approach and the significant benefits of using the renewable energy resources.     

调频斜率极性捷变SAR欠采样转发干扰

针对传统欺骗干扰难以对调频斜率极性捷变SAR形成有效干扰的问题,研究了对调频斜率极性捷变SAR进行欠采样转发干扰的方法。通过建立调频斜率极性捷变SAR有限时长欠采样转发干扰信号模型,分析欠采样转发干扰对调频斜率极性捷变SAR的干扰效果。给出假目标数目、位置以及幅度的理论计算公式,在此基础上讨论欠采样周期对干扰效果的影响。利用数字仿真验证了理论分析的正确性。     

标准的先进性与可操作性——WJ/Z 429-2004《反坦克导弹武器系统精度分配导则》编制体会

在标准的编制中处理好标准技术的先进性与可操作性是至关重要的，如果不顾及我国企业的现实情况，片面地强调技术先进，标准将难于贯彻，标准失去了制定的价值；同样照搬企业现行技术，缺乏技术升华，也失去了制定标准的意义。本文结合WJ／Z429—2004《反坦克导弹武器系统精度分配导则》编制工作介绍了这方面的工作体会。     

超声波金属熔体处理机强迫风冷问题的数值模拟

针对超声波金属熔体处理机因高温金属熔体的传热而产生的温度快速升高问题,采用ANSYS/FLOTRAN CFD对处理机进行了流场和温度场耦合分析,得到了不同冷却气流量下的换能器温度分布。同时,采用流-固/热耦合共轭传热问题求解方法得到了冷却腔内流固界面的对流换热系数,避免了试验测试的困难,为超声波金属熔体处理机的散热和冷却提供了设计依据。     

从美军伊拉克战争看现代战争制心权的发挥

现代战争侧重对制心权的争夺。伊拉克战争表明战争的“正义性”是现代战争制心权发挥的政治基础，军事实力是战争制心权发挥的物质条件，战争谋略是战争制心权发挥的必然要求，信息科技优势是战争制心权发挥的技术支撑，加强心理防护是战争制心权发挥的重要条件。     

武警总队应急车辆故障诊断系统研究

将人工神经网络和基于案例推理技术结合用于车辆故障诊断系统中，构建了ANN与CBR结合模型，阐述了各子系统的基本功能及相互关系，并对关键技术进行了详细解释。实例诊断表明，ANN和CBR方法的结合有效地弥补了它们各自的缺陷，提高了应急条件下车辆的维修保障能力。     

基于神经网络的混合双滤波器自适应目标跟踪算法

在分析近期基于神经网络数据融合的目标跟踪算法的基础上,结合一种新的自适应滤波模型(NAF)和速度估计自适应跟踪算法(AVE),提出了基于神经网络混合双滤波器的机动目标自适应跟踪算法(NHDF).该算法通过在线自动调节网络输出进行过程噪声方差融合,降低了现有算法因系统方差的调整不当而带来的精度损失.理论分析及仿真结果证明,与"当前"统计模型、速度自适应模型和新的自适应模型算法相比,该算法具有跟踪精度高,自适应能力强的优点.     

机动管线河流水面铺设牵引力分析与计算

机动管线在穿越河流时常采用水面浮运的方式铺设到对岸,铺设过程中,准确计算管线所受拉力是可靠地设计穿越装备、管线安全施工及运行的关键。建立了水面浮运的数学模型,得出了受力面积的选取方法,利用积分法导出了管线两端拉力的计算公式,指出了影响拉力的因素。采用3种流速方式分别计算出管线两端的拉力并进行了比较,采用符合实际情况的水面流速函数计算出的结果比较合适,对铺设设备的选取提供了理论支撑,对管线铺设有一定的参考价值。