INTEGRATION在奥运会专用道应急备选径路选择方面的研究及应用

通过建立基于INTEGRATION的奥运会专用道应急备选径路评估平台,以奥林匹克公园周边路网中专用道发生交通事故为例,选取行程时间和行程时间可靠性作为分析指标,分析了事故发生时有无备选径路对奥运大家庭车辆运行状况的影响,验证了lNTEGRATION在评估备选径路方案方面的应用效果.     

INTEGRATION在奥运会专用道应急备选径足选择方面的研究及应用

通过建立基于INTEGRATION的奥运会专用道应急备选径路评估平台，以奥林匹克公园周边路网中专用道发生交通事故为例，选取行程时间和行程时间可靠性作为分析指标，分析了事故发生时有无备选径路对奥运大家庭车辆运行状况的影响，验证了INTEGRATION在评估备选径路方案方面的应用效。     

带时间窗的多目标配送线路选择问题的目标规划模型

基于客户等待时间的含义和目标规划原理,为带时间窗的多目标物流配送线路选择问题构造了线性目标规划模型。建模时考虑了运输费用最小、运输时间和所有客户的等待时间最短三个相互冲突的目标。     

基于蚁群算法的应急物流配送车辆调度研究

以车辆配送问题为背景,运用了蚁群算法来求解应急物流配送车辆调度模型。在带有时间窗的基础上考虑应急系统各节点的运输距离和费用构造模型。根据模型的特点,设计了蚁群算法求解方法,并针对蚂蚁路径选择做了改进性分析。实例研究结果表明．蚁群算法在应急物流配送车辆调度问题中具有合理性、可行性和有效性。     

基于因子分析法的物流供应商选择模型研究

为了解决在B2C交易实现过程中,由于物流配送供应商的选择不当,而出现配送周期长、费用高、退货退款率增加等问题,本文利用因子分析法探索选择物流配送供应商的合理方法,运用便捷有效的方法帮助电商选择适合自己的物流配送供应商。     

基于改进遗传算法的连锁便利店配送路径优化研究

针对零售超市较高的送货时间段、服务时间要求,构建以配送费用最小为目标的带时间窗物流配送路径优化模型,以优化零售小店物流配送网络、提高物流配送质量为目的,采用改进遗传算法对模型进行求解。以石家庄部分苏宁小店为例,对其物流配送路径进行研究,优化后路径配送费用比优化前降低21.5%,研究结果为企业确定经济、合理的配送路径提供参考。     

应急物流配送体系研究

分析了应急物流配送的内涵和特性,在此基础上建立了应急物流配送体系,从应急物流配送中心的建立、救灾物资配送方案的选择和物流通道的建设三个层面进行了较为深入的分析和探讨,并对配送工作的加强提出了建议。     

巴氏奶冷链物流配送中心选址模型

物流业的发展和人们生活水平的不断提高,对巴氏奶冷链物流提出了更高的要求。而巴氏奶冷链物流配送中心作为连接巴氏奶生产企业和零售商的中间桥梁,对保证巴氏奶的供应量的品质安全上起着极其重要的作用。因此,科学合理地选择巴氏奶冷链物流配送中心的地点是至关重要的。本文采用了基于计算以选址的土地费用和运输费用为主的综合费用的选址模型,对巴氏奶冷链物流配送中心进行选址决策。     

制造企业物流运输成本分析及控制措施

我国的物流运输成本一直居高不下,文章从道路等级、道路网络结构及道路交叉口三个角度,分析了物流运输成本的组成及影响因素,并从企业和政府两个角度提出了改善措施,旨在为政府设置和优化物流配送通道提供参考,为企业选择与优化物流配送线路提供建设性意见。     

步进式加热炉出钢机自动出钢行程探讨

文章通过对步进式加热炉出钢机行程进行探讨,有效地解决了在出钢过程中由于出钢行程导致的事故,因而提高了作业率。出钢计算行程优化实施以来,极大地降低了出钢事故时间,为企业增加了效益。     

A mixed behaviour equilibrium model with mode choice and its application to the endogenous demand of automated vehicles

This study develops a mixed behavioural equilibrium model with explicit consideration of mode choice (MBE-MC) in a transportation system where fully automated vehicles (AV) coexist with conventional human-driven vehicles (HV). For the mode choice, travellers select among three options, following a logit modal split: driving their private HV, or taking an AV mobility service provided by either a firm or the government. For the route choice, the HV drivers follow the random utility maximisation principle while central agents route the AV passengers following the Cournot Nash (firm agent) or Social Optimal (government agent) principles. We consider two types of travel costs (i.e. travel time and monetary travel cost) to characterise the new features (e.g. expanded link capacity and reduced value of time) of the mixed AV–HV transportation system. We model the MBE-MC problem in a combined mode–route choice framework and formulate it as a route-based variational inequality (VI) problem. We show the equivalence between the VI formulation and the MBE-MC problem, and the existence of a solution to the MBE-MC problem. Then, we modify a partial linearisation algorithm for solving the proposed model. Numerical results validate the equilibrium conditions and show the efficacy of the new model in capturing the features of the mixed AV–HV transportation system. The impact patterns of different parameters on (1) the network performance in terms of AV share and system cost and (2) on the solution efficiency are analysed.     

基于灰色理论的应急物流最优路径选择

以应急物流的概念与特性为切入点,确定了行驶时间、拥挤程度、行驶困难度、货物运输的安全性和运输组织的便捷性五个评价指标,并利用带有专家可信度的非线性优化层次分析法来确定各评价指标的权重系数,运用灰色系统理论建立了应急物流的路径选择方法。     

基于灰色关联的应急物流最优路径选择

面对突发事故,合理运输路径的选择旨在最大程度的提高救援效率。文中选定运输时间、运输距离、行驶困难度、货物运输的安全性和运输组织的有效性五个指标,利用熵值法来确定各评价指标的权重系数,并运用灰色关联理论建立了应急物流的最优路径选择方法。     

Stochastic Route Choice Equilibrium Assignment for Travelers with Heterogeneous Regret Aversions

Most route choice models assume that people are completely rational. Recently, regret theory has attracted researchers’ attentions because of its power to depict real travel behavior. This paper proposes a multiclass stochastic user equilibrium assignment model by using regret theory. All users are differentiated by their own regret aversion. The route travel disutility for users of each class is defined as a linear combination of the travel time and anticipated regret. The proposed model is formulated as a variational inequality problem and solved by using the self-regulated averaging method. The numerical results show that users’ regret aversion indeed influences their route choice behavior and that users with high regret aversion are more inclined to change route choice when the traffic congestion degree varies.     

发达网络环境下军用油料运输路径选择研究

对军事油料运输的特点进行了分析,筛选出了影响军用油料运输决策的主要目标:运输时间、可靠性、安全性。并考虑在发达的运输网络情况下,解决基于多目标的油料运输路径选择优化问题。     

基于预知OD的城市路网交通流路径优化研究

针对城市路网交通流分布不均引起的交通拥堵问题,提出了在预约出行交通背景下基于预知OD的交通流路径优化方法。首先,分析了预约出行交通背景下预知OD的数据环境;其次,根据动态用户均衡准则,对预知的OD进行流量分配,给出预约出行车辆的路径;接着,使用预测控制的方法,结合路网上预约车辆的状态,以路网上路段的饱和度和未预约车辆的行程时间最小化为目标,从系统和用户两个角度对未预约车辆的路径进行实时的诱导,通过连续时域的滚动优化控制,优化交通流的路径;最后,对本方法的实现和应用做了思考和探索,对本研究做了总结。     

城市交通出行影响因素的计量检验

在国内外相关研究的基础上,通过国内40个交通出行样本数据的计量分析,建立了平均出行距离和出行时耗的多元回归方程,发现城市规模是影响单中心城市平均出行距离和出行时耗的主要因素,公交车分担率的提高相应增加了平均出行时耗,而高密度的城市开发有利于出行距离和出行时耗的降低.     

Cost-sharing in directed networks: Experimental study of equilibrium choice and system dynamics

This study reports the results of an experiment on directed networks with positive externalities induced by cost-sharing. Subjects participated in a network game in which they had to choose between private and public transportations. If a player chose public transportation, then she shared the travel cost equally with other players making the same choice, whereas if she chose private transportation, then her travel cost was fixed. Travel costs on the private route were manipulated across the two experimental conditions. In one condition, these costs were homogeneous among players; in the other condition, they were heterogeneous among players and only privately known. We found that half (none) of the player groups in the homogeneous (heterogeneous) condition converged toward the efficient equilibrium. Examination of the system dynamics shows that convergence toward efficiency was facilitated by: (1) the existence of an intermediate equilibrium choice; and (2) strategic teaching by which a farsighted player chooses strategies with poor short-term payoff in order to shift group decisions to the efficient equilibrium and thereby increase her own long-term benefit.     

确定战时航空弹药调拨运输方案的探讨

综合考虑时间、费用、安全性等各项要求,提出代价系数的概念。利用线性规则、图论等方面的知识,求取最小代价系数路,进而得出最佳的航空弹药调拨方案。     

战时导弹保障路径的随机规划优化模型

针对战时导弹保障路径规划这一组合优化问题,在分析导弹保障路径优化过程中的不确定性因素的基础上,以时间、可靠度、损耗为置信度,运用网络图及不确定机会约束理论构建了导弹保障路径优化的随机规划模型,并通过具体案例来模拟验证模型的合理性和有效性。