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为解决航班延误造成机场停机位占用冲突问题,在对延误等级进行划分的基础上,以最小化机坪冲突概率,旅客变更登机口步行距离和指派至远机位的旅客数为目标,构建停机位实时指派的多目标优化模型,设计带精英策略的非支配排序遗传算法(NSGA-Ⅱ)求解.利用我国某大型机场的实际运行数据进行仿真验证.结果表明:在机位占用冲突得到成功化解的基础上,旅客变更登机口的平均步行距离减至102.9 m,指派至远机位的旅客数减至0人;所提出的停机位实时指派模型在保证机坪安全运行的前提下,能有效优化旅客乘机体验,提升机坪运行效率,为繁忙机场停机位资源调度提供决策支持. 相似文献
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李兵 《重庆交通大学学报(自然科学版)》2007,26(Z1):166-168
研究了一类具有连续分布时滞的神经网络的耗散性和全局吸引性.利用非负矩阵和微分不等式技巧,在一般的条件下,获得了关于此类系统解的耗散性的新判据,并估计出超球形全局吸引集的边界. 相似文献
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Milan Janic 《运输规划与技术》2013,36(5):501-520
Abstract This paper develops a heuristic algorithm for the allocation of airport runway capacity to minimise the cost of arrival and departure aircraft/flight delays. The algorithm is developed as a potential alternative to optimisation models based on linear and integer programming. The algorithm is based on heuristic (‘greedy’) criteria that closely reflect the ‘rules of thumb’ used by air traffic controllers. Using inputs such as arrival and departure demand, airport runway system capacity envelopes and cost of aircraft/flight delays, the main output minimises the cost of arrival and departure delays as well as the corresponding interdependent airport runway system arrival and departure capacity allocation. The algorithm is applied to traffic scenarios at three busy US airports. The results are used to validate the performance of the proposed heuristic algorithm against results from selected benchmarking optimisation models. 相似文献
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王秋宝 《石家庄铁道学院学报》2010,23(3):34-40
研究了一类带有两个离散延迟的双神经元的神经网络系统。通过分析相应的特征方程得到了零平衡点稳定和不稳定的一些充分条件。进一步讨论了系统局部Hopf分支的存在性。 相似文献
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城市路网中由于交叉口转向延误不可忽略,因此需要能够考虑转向延误的最短路径求解算法。传统的存储结构没有考虑转向延误,不再适应考虑延误后的新算法。在对比分析传统存储结构的基础上,通过引入新指针,对传统邻接链表结构进行了改进,使其能够高效率地实现节点延误的存储,并且给出了该结构的C 类模板实现方法。这些为交通管理规划实施事先评价和实现交通流诱导提供支持。 相似文献
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Enhanced delay propagation tree model with Bayesian Network for modelling flight delay propagation 总被引:1,自引:0,他引:1
An enhanced Delay Propagation Tree model with Bayesian Network (DPT-BN) is developed to model multi-flight delay propagation and delay interdependencies. Using a set of real airline data, results show that flights have non-homogeneous delay propagation effects. The DPT-BN model is used to infer posterior delay profiles with different delay and scheduling scenarios. The major contribution of the DPT-BN model is to demonstrate how the modelling of non-independent and identically distributed delay profiles is more realistic for the observed delay propagation mechanism, and how robust airline scheduling methodologies can benefit from this probability-based delay model. 相似文献
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航班延误统计指标体系及延误等级评估研究 总被引:2,自引:0,他引:2
针对我国现行航班统计方法存在的缺陷,基于对航班运行全过程以及在此过程中空管、航空公司、机场等单位工作职责的分析,构建了科学系统的航班延误统计指标体系,同时设计了航班延误等级综合评估的模型。上述统计指标体系及评估方法经国内某航空公司实际试用表明,与目前民航所使用的航班正常性统计标准比较,该方法能够更加真实、准确地跟踪航班整个运行阶段的延误状况,较好地反应了航班的实际运行情况,能有效地支持航空公司运行管理部门的延误控制和公司决策层的宏观管理。 相似文献
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In this paper large connected vehicle systems are analyzed where vehicles utilize vehicle-to-vehicle (V2V) communication to control their longitudinal motion. It is shown that packet drops in communication channels introduce stochastic delay variations in the feedback loops. Scalable methods are developed to evaluate stability and disturbance attenuation while utilizing the mean, second moment, and covariance dynamics in open chain and closed ring configurations. The stability results are summarized using stability diagrams in the plane of the control parameters while varying the packet delivery ratio and the number of vehicles. Also, the relationship between the stability of different configurations is characterized. The results emphasize the feasibility of V2V communication-based control in improving traffic flow. 相似文献