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在深入分析航空兵场站飞行后勤保障车辆组织指挥活动规律的基础上,利用离散事件系统建模仿真软件Arena,建立航空兵场站飞行后勤保障车辆调度模型.结合不同保障车辆资源约束条件下的一个实例,利用仿真软件Arena对所建立保障车辆调度模型进行了仿真.通过对仿真结果的对比分析,验证了所建保障车辆调度模型的科学性、有效性,为场站指... 相似文献
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抢险救灾非战争军事行动包括道路抢修和物资运输等任务,而这两类任务在灾后应急资源调度中存在关联性的影响,且面临路网结构可变及需求随机模糊等挑战,对此,提出了一种非确定性应急资源调度网络双层规划模型,设计了基于蒙特卡洛方法与遗传算法耦合的智能启发式求解策略.通过对典型情境下应急资源调度案例进行分析建模和数值求解,说明了该模型和算法的合理性和有效性. 相似文献
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装备维修任务调度研究综述 总被引:1,自引:0,他引:1
分析了装备维修任务调度需求及意义,综述了装备维修任务调度理论研究现状,围绕旅行商问题(Traveling Salesman Problem,TSP)、车辆路径问题(Vehicle Routing Problem,VRP)、项目调度问题(Project Scheduling Problem,PSP)和车间调度问题(Shop Scheduling Problem,SSP),综述了装备维修任务调度的典型模型及相应模型的求解算法,最后,从装备维修任务调度理论、调度策略、调度模型和调度算法4个方面提出了下一步装备维修任务调度研究的方向。 相似文献
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针对装备应急器材调度决策问题,从调度路径优化和调度计划分配2个方面,研究了其多目标优化模型的构建。将资源点划分为若干级别来确定资源点选取的优先次序,通过先求解资源点与需求点之间的最优路径,后求解器材资源分配量的思路,建立了装备应急器材调度决策的广义最优路径模型和运输模型,采用改进的Dijkstra算法对模型进行求解,仿真结果表明:所构建的决策模型及算法是有效的。 相似文献
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天基预警系统资源调度方法 总被引:1,自引:0,他引:1
对面向导弹预警任务的天基预警系统中的低轨卫星资源调度问题进行了研究.对预警任务的特性进行分析,提出了一种预警任务规划与分解方法以减少任务对资源占用时间的需求;在此基础上建立了该问题的约束满足CSP调度模型;针对该模型变量多、解空间规模庞大的特点以及对求解算法时效性的要求,设计了一种基于局部解空间跳出机制的改进型遗传算法MGA.仿真表明该模型与算法在给定时间内能够得到满意的调度方案. 相似文献
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This article considers the empty vehicle redistribution problem in a hub‐and‐spoke transportation system, with random demands and stochastic transportation times. An event‐driven model is formulated, which yields the implicit optimal control policy. Based on the analytical results for two‐depot systems, a dynamic decomposition procedure is presented which produces a near‐optimal policy with linear computational complexity in terms of the number of spokes. The resulting policy has the same asymptotic behavior as that of the optimal policy. It is found that the threshold‐type control policy is not usually optimal in such systems. The results are illustrated through small‐scale numerical examples. Through simulation the robustness of the dynamic decomposition policy is tested using a variety of scenarios: more spokes, more vehicles, different combinations of distribution types for the empty vehicle travel times and loaded vehicle arrivals. This shows that the dynamic decomposition policy is significantly better than a heuristics policy in all scenarios and appears to be robust to the assumptions of the distribution types. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008 相似文献
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战时弹药供应协同调运模型研究 总被引:1,自引:0,他引:1
弹药协同调运是战时弹药保障工作中的重要环节,其协同调运的合理性将直接影响到弹药保障工作的顺利进行.针对弹药的调运问题,从战时技术实施与应用角度研究弹药的调运问题,以到达需求点的运输时间、弹药输送车数量以及弹药损失量为优化目标,建立一种多目标决策模型,为缩短运输时间、减少弹药输送车数量、提高安全到达需求点的弹药量提供一种实用的方法. 相似文献
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在多无人机协作侦察中,匹配识别不同无人机侦察发现的装甲车辆,属于车辆再识别任务。近年来,车辆再识别技术在智能交通领域得到了快速发展,但是该技术尚未在军事领域得到充分的关注和应用。本文围绕该技术的发展和军事应用展开研究,一方面,从数据集、特征表示、注意力学习、度量学习、属性学习等方面对民用车辆再识别技术进展进行综述,分析总结了现有技术的优点和劣势,提出了有待深入探索的研究方向;另一方面,以多无人机协作侦察任务为背景,探讨分析了车辆再识别在其中的作战运用方式,并针对战场上存在的计算资源有限、环境复杂多变等因素导致车辆再识别性能下降问题,提出了可能的解决思路。本文研究可为车辆再识别技术在多无人机协作侦察中的应用提供前瞻性参考。 相似文献
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全地形环境感知系统是研究车辆自主能力的重要部分,也是车辆安全行驶的绝对基础,而车辆的可通行区域分析则是环境感知系统中不可缺少的一步。本文分析了全地形环境下可能对装备车辆的地面通行性产生影响的众多地理环境因素,并结合多类型的地理环境因素,对包含地面坡度、植被、水系和建筑物等因素在内的,能够反映地面可通行性的车辆可通行区域以及装备车辆的可行驶区域进行规划。依托 ArcGIS平台和C++编程语言,对ArcGIS进行了二次开发,建立了一套针对全地形复杂环境下的路面可通行区域分析模型。该模型可以根据装备车辆的不同参数实现地理因子影响系数的设定,满足不同条件下车辆的可通行区域规划。 相似文献
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底盘选型研究是保证新型加油车机动性大幅提升的基础.评析了标志地面车辆通行能力的多种概念,根据车辆机动性评估原理,提出了涵盖车辆快速性、支承通过性和几何通过性的机动性量化评估模型.应用该评估模型评定了备选车辆的机动性,验证了评估模型的有效性,选定了全地形加油车高机动性底盘,为车辆机动性的量化评估提供了研究思路. 相似文献
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Xiangtong Qi 《海军后勤学研究》2005,52(4):312-320
Logistics scheduling refers to the problems where the decisions of job scheduling and transportation are integrated in a single framework. In this paper, we discuss a logistics scheduling model where the raw material is delivered to the shop in batches. By making the batching and scheduling decisions simultaneously, the total inventory and batch setup cost can be reduced. We study different models on this issue, present complexity analysis and optimal algorithms, and conduct computational experiments. Some managerial insights are observed. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005. 相似文献
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It well known that vehicle detection is an important component of the field of object detection. However, the environment of vehicle detection is particularly sophisticated in practical processes. It is compara-tively difficult to detect vehicles of various scales in traffic scene images, because the vehicles partially obscured by green belts, roadblocks or other vehicles, as well as influence of some low illumination weather. In this paper, we present a model based on Faster R-CNN with NAS optimization and feature enrichment to realize the effective detection of multi-scale vehicle targets in traffic scenes. First, we proposed a Retinex-based image adaptive correction algorithm (RIAC) to enhance the traffic images in the dataset to reduce the influence of shadow and illumination, and improve the image quality. Second, in order to improve the feature expression of the backbone network, we conducted Neural Architecture Search (NAS) on the backbone network used for feature extraction of Faster R-CNN to generate the optimal cross-layer connection to extract multi-layer features more effectively. Third, we used the object Feature Enrichment that combines the multi-layer feature information and the context information of the last layer after cross-layer connection to enrich the information of vehicle targets, and improve the robustness of the model for challenging targets such as small scale and severe occlusion. In the imple-mentation of the model, K-means clustering algorithm was used to select the suitable anchor size for our dataset to improve the convergence speed of the model. Our model has been trained and tested on the UN-DETRAC dataset, and the obtained results indicate that our method has art-of-state detection performance. 相似文献
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为仿真履带车辆动力性,建立了动力性评价指标的仿真模型,并以某型车为实例,应用Matlab语言编程计算得出理论值,通过与试验值比较验证了模型的有效性和准确性。 相似文献