Airline delay management problem with airport capacity constraints and priority decisions

This paper deals with the Airline Delay Management Problem (ADMP), which can be described as the task of dealing with daily airline operational delays and deciding whether to delay subsequent flights at a hub airport or to have them departing on time. An innovative integer linear programming approach is presented to the capacitated case of the ADMP and airport limitations in terms of bay availability, taxiway capacity and runway separation are incorporated to represent capacity constraints. Fuel cost, passenger compensation, and passenger inconvenience costs are included in the objective function. The decision variables include the re-timing of flight departures and arrivals, the use of the airport capacity over time and the rebooking of passengers in case of missed connections. To guarantee the linearity of the optimization model and fast computational times, a receding horizon modeling framework is adopted. The approach is applied to a case study using real operational and passenger data from an international hub-and-spoke carrier. The case study shows the capability of the linear model to deal with a complete day of operations within a few minutes. The results suggest that the proposed approach can lead to cost reductions of almost 30% during recovery, when compared with the solution from the airline. In addition, a sensitivity analysis is provided to investigate the impact of not including passenger inconvenience costs and of reducing runway capacity.     

Hub competition and travel times in the world-wide airport network

The aim of this work is to measure the competition between airport hubs based on an analysis of travel times in the world-wide airport network. By considering the minimum travel time required to connect each pair of airports, it is possible to create new measures of hub competition, separating the effects of hub position and temporal coordination. This analysis was carried out at the global level, considering all 232 airports with more than 3 million seats yearly offered in departure flights in 2008, and also in relevant geographic markets. The results show a high level of competition among the most important world airports, but the major airports of Europe have a geographical advantage in relation to world markets over the major American and Asian airports. We also show that airports located in different continents often compete for the same origin–destination markets. Geographical position appears to be the most important variable explaining hub performance. Secondary hubs show a higher degree of specialization towards specific markets.     

综合交通枢纽内换乘班次衔接优化研究

综合交通枢纽内换乘衔接的合理、有效程度是影响整个综合运输体系效率的关键。针对既有研究中对换乘衔接建立模型存在的问题,参照复杂网络理论以结构解释网络功能的思想,建立综合交通枢纽内部的换乘班次衔接网络。以换乘班次衔接网络自身特点为基础,提出反映换乘网络结构的平均路径长度、聚类系数、度3个统计特征,并通过算例对换乘网络整体存在的问题和能力不匹配、时间不接续等实际情况给出解决方案。     

复合枢纽机场工作区规划解析——以白云国际机场南工作区为例

机场工作区是保障机场正常运作的必不可少的功能区域,以广州白云国际机场南工作区为例探讨复合枢纽机场工作区的功能分区、建筑布局、道路交通组织以及景观形象规划,以期为未来其他各地机场工作区规划提供参考。     

长三角完善现代化枢纽型基础设施体系的思路和对策

现代化枢纽型基础设施体系建设是长三角区域基础设施建设的重要内容.本文对长三角现代化枢纽型基础设施体系的发展态势、存在的主要问题进行了分析,提出长三角现代化枢纽型基础设施体系建设的长远和近期任务,并提出需要解决的重大体制机制,力争为长三角完善现代化枢纽型基础设施体系提供决策参考.     

Why Do European Companies Have Innovation Hubs in Silicon Valley—Best Practice Examples and Key Takeaways

Innovation hubs are gaining high attention in recent years, especially from European companies. Silicon Valley has been deemed as one of the most attractive and successful environments for establishing innovation hubs. This article highlights examples of companies from Europe that made the step to California—namely, Volkswagen, Swisscom, BMW, Axel Springer, Munich Re, and Innogy SE (RWE Group). Based on these companies’ experiences, recommendations are given on how companies might approach a setup in Silicon Valley for long‐term success. © 2016 Wiley Periodicals, Inc.     

金华铁路运输发展现状及对策研究

金华发展铁路运输对于推进"义甬舟"开放大通道及中欧班列(义乌)发展、高质量建设"一带一路"具有重要意义。在分析金华铁路运输发展现状的基础上,从铁路运输通道、铁路运输场站、铁路运输集疏运体系、铁路运输组织、地方配套服务平台等方面分析金华铁路运输存在的不平衡、不充分、不协调等问题,提出金华铁路运输发展对策:畅通对外运输通道,优化金华铁路枢纽系统,完善铁路集疏运体系,建立路地协调机制,搭建地方服务平台,强化政府主导作用。     

大理动车运用所选址方案研究

随着多条铁路引入大理枢纽及周边路网的完善,枢纽内急需增加动车组运用检修存放设施,以满足旅客出行需求及实现大理地区路网通达的需要。在阐述大理枢纽规划和动车组检修工作量的基础上,确定大理动车运用所规模,分析横列式和纵列式2个布置方案,结合动车运用所选址原则提出蛇山方案、苍甸山方案、凤仪方案3个动车运用所选址方案,从运营长度、工程条件、后期发展等方面对3个方案进行综合比选,最终确定经济合理、适应城市规划及铁路科学发展的蛇山方案。动车运用所的建设研究有利于完善大理枢纽功能,提升铁路区域运输能力。     

Factors influencing the hub connectivity of Beijing Capital Airport in its international markets

This paper investigates factors influencing the hub connectivity of Beijing Capital Airport (PEK) in its domestic to international markets between 2014 and 2018 based on a random-effect panel data model. The results show that variables representing the temporal and spatial characteristics of connecting flights have significant impacts on the hub connectivity of PEK. In specific, the changeable threshold of maximum connecting time based on different international destination regions has a negative impact. This paper identifies different timetable coordination modes at PEK and shows that the number of indirect connections under adjacent mode is significantly less than that of distant mode. Circuity and directionality are proven to have significant impacts. In addition, factors representing airport characteristics and heterogeneity of international destination regions also affecting the hub connectivity of PEK.     

武汉铁路枢纽客运系统布局与分工研究

随着武汉铁路枢纽路网构架进一步扩充,客运系统运能紧张、过江通道能力不足,为解决路网结构缺陷、提升武汉城市群城际铁路断头线的路网功能,阐述武汉铁路枢纽与衔接客运铁路布局既有现状,为应对武汉铁路枢纽客运作业量及过江运量的增长,补强客运系统及过江通道能力,对武汉铁路枢纽客运系统布局与分工提出3个规划方案,经综合比选分析,采用新建新汉阳站和天河北站并将客运系统调整为"四主两辅"方案。研究结论能够满足高品质出行服务需求,对武汉铁路枢纽客运系统布局与分工提供借鉴。