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海面目标运动和编队阵型的约束特性,使得通过对装订阵型和末制导探测阵型进行点集匹配来选择预定目标成为一种有效途径。但当编队目标释放干扰时,会引起阵型结构发生局部变化,导致目标选择性能恶化。本文基于反舰导弹目标选择需求,分析了传感器导航和探测误差、装订信息误差、编队目标运动和释放干扰等因素所引起的位置点集变形,通过利用阵型中未污染的结构信息,提出了基于几何散列法和结构加权平均Hausdorff距离的编队预定目标选择方法。理论分析和实验结果表明,该方法不受传感器导航误差和编队目标整体运动的影响,在编队存在冲淡干扰时能有效提高目标选择能力。 相似文献
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随着标准和算法的不断演进,高端嵌入式应用对性能和能耗提出了越来越高的要求.然而,能耗问题成为将VLSI潜力转换为实际应用需求的最大挑战,基于此,提出ET( Embedded Tera-scale Computing)处理器设计.ET以众多轻量级处理器(称为小核)来搭建目标处理器,每个小核都是一个基于显式数据和指令管理的... 相似文献
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奎屯及邻近地区在甸动物地理区划上隶属于古北界的蒙新区。本文所记述的该地区37种半翅目昆虫中,世界广布种有2种。只分布于古北界的有28种,占总种数的75.7%。显然古北界的种类占绝对优势。这与奎屯及邻近地区本身就位于古北界完全符合。在我国的动物地理区划中,只在蒙新区有分布的23种,占总种数的62.2%,说明蒙新区仍然有自己独特的种类,这与该区的自然环境与其他各区有较大差别相符合。 相似文献
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We consider a mixed‐model assembly line (MMAL) comprised a set of workstations and a conveyor. The workstations are arranged in a serial configuration. The conveyor moves at a constant speed along the workstations. Initial units belonging to different models are successively fed onto the conveyor, and they are moved by the conveyor to pass through the workstations to gradually generate final products. All assembling tasks are manually performed with operation times to be stochastic. An important performance measure of MMALs is overload times that refer to uncompleted operations for operators within their work zones. This paper establishes a method to analyze the expected overload times for MMALs with stochastic operation times. The operation processes of operators form discrete time nonhomogeneous Markov processes with continuous state spaces. For a given daily production schedule, the expected overload times involve in analyzing the Markov processes for finite horizon. Based on some important properties of the performance measure, we propose an efficient approach for calculating the expected overload times. Numerical computations show that the results are very satisfactory. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007 相似文献
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根据我国白酒行业白酒库的建设和使用现状,分析白酒库和白酒成品库的实际火灾危险性,针对防火设计方面存在的疑难,对总平面布置、储存、建筑构件、消防设施等设计要求进行了分析研究,并提出防火设计措施. 相似文献