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针对代价函数权重需要根据环境变化而变化的问题,结合飞行约束条件提出归一化的代价函数,当环境发生变化时,不用再修改代价函数,增强了算法的鲁棒性。为了弥补传统定步长寻径算法耗时长的缺陷,设计了一种基于B样条曲线与遗传算法的高时效寻径算法。利用遗传算法在地图中所寻合适的控制点,再结合B样条曲线生成航路。为了增强遗传算法的全局搜索能力,遗传算法中加入振动法则,使得种群在进化中后期依旧保持一定的多样性。仿真结果表明该算法与精英蚁群算法相比,规划时间大幅缩短;与振动遗传算法相比,航路代价明显降低。 相似文献
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针对当前武器装备需求分析中存在的流程不规范和方法不明确等问题,基于体系结构框架思想,提出了武器装备需求分析方法,构建了武器装备需求分析框架,规范了武器装备需求分析流程,研究了武器装备需求分析的不同环节及其方法,并以陆航武装直升机编队遂行超低空“蛙跳”式对地火力攻击为例,验证了基于体系结构框架的武器装备需求分析方法的科学性和可用性. 相似文献
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中国人民武装警察部队是党和国家武装力量的重要组成部分.我党十分重视武警部队的建设和发展.在不同历史时期,党的领导人根据形势和任务变化需要,先后提出了一系列重要指导思想,指导武警部队不断发展壮大;武警部队有效履行了党和国家赋予的历史使命,出色完成了各项光荣而艰巨的任务. 相似文献
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An intersecting cavern is a common structural form used in underground engineering, and its safety and stability performance directly control the service performance of the whole project. The dynamic re-sponses of the three kinds of crossing type (+-shaped, T-shaped, L-shaped) caverns subjected to ground shock were studied by numerical simulation. The velocity plus force mode boundary setting method was proposed in the coupled static and dynamic analysis of a deep underground cavern. The results show that, among the three types of crossing caverns, the+-shaped cavern is the most significantly affected by the dynamic action, followed by T-shaped, and then L-shaped caverns. The vault settlement, straight wall deformation, vault peak particle velocity, effective plastic strain of surrounding rock, and maximum principal stress and strain at the bottom of the lining of the straight wall increase with the increase of cavern span. The vault settlement, straight wall deformation, effective plastic strain of surrounding rock, and the maximum principal stress and strain at the bottom of lining to the straight wall decrease with the increase of lateral pressure coefficient, and the peak particle velocity at the vault increases. The variation is small compared with the change of cavern span. The influence range of the underground cavern intersection is two cavern diameters from the intersection centre. The bottom of the straight wall at the intersection is the weak part. It is suggested to thicken the support locally to improve the stability of the cavern. 相似文献
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CEC条件下的舰艇编队防空问题 总被引:13,自引:4,他引:9
未来战争是"海、陆、空、电、天"五位一体的高技术战争,机动战、火力战和信息战将贯穿于作战的全过程.面对这样一种局面,传统的水面舰艇编队防空作战样式必将发生重大变革以适应未来海战的需要.美国海军针对上述情况研究了协同作战能力(CEC),并将其推广应用于各种指挥系统.CEC已经成为一种提高指挥系统协同作战能力的重要技术,通过使每个独立平台成为战斗群的延伸来弥补单个平台的弱点.借鉴了网络中心战的思想并结合美军提出的CEC,分析了CEC条件下的我水面舰艇编队的防空问题. 相似文献
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In this paper, we consider a new weapon–target allocation problem with the objective of minimizing the overall firing cost. The problem is formulated as a nonlinear integer programming model. We applied Lagrangian relaxation and a branch‐and‐bound method to the problem after transforming the nonlinear constraints into linear ones. An efficient primal heuristic is developed to find a feasible solution to the problem to facilitate the procedure. In the branch‐and‐bound method, three different branching rules are considered and the performances are evaluated. Computational results using randomly generated data are presented. © 1999 John Wiley & Sons, Inc. Naval Research Logistics 46: 640–653, 1999 相似文献
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提出一种研究长程互相关和多重分形的新方法——Q阶混合矩结构分割函数法(Q-MMSPF),并利用Q-MMSPF分析了海杂波时间序列的多重分形互相关特征。通过对实测海杂波数据的计算分析发现,海杂波互相关多重分形特征较弱,目标信号之间的互相关多重分形特征明显,而目标信号与海杂波之间的互相关多重分形程度介于二者之间。据此,本文采用一种新的特征值进行海杂波背景下的目标检测。通过对不同条件下的实测海杂波数据验证,表明使用本文提出的特征值测量方法可以十分有效地检测出海杂波背景下的小弱目标。 相似文献