A Time-Space Network Model Based on a Train Diagram for Predicting and Controlling the Traffic Congestion in a Station Caused by an Emergency

Qu, Zihan; He, Shiwei

doi:10.3390/sym11060780

Cited by 7 publications

(7 citation statements)

References 27 publications

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“…This is confirmed by a number of publications, for example, [34][35][36][37]. It has been proven that the synergistic effect of a large LS, which is characteristic, for example, of logistics centers, is a consequence of the centralization and concentration of operations of an informational and analytical nature [18]. However, there are very few works where such an effect was reflected in models and was reproduced under different flow conditions and external disturbances.…”

Section: Analysis and Arrangement Of Information Flowsmentioning

confidence: 58%

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Coordination of material and information flows in intercity logistics systems

Oliskevych¹,

Danchuk

Pelo

et al. 2022

Logistics Systems: Technological and Economic Aspects of Efficiency

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The problem of the effectiveness of the use of road transport in logistics systems is considered. Carriers attract additional motor vehicles according to increasing in freight turnover, namely in long-distance routes. The trend of growth in the volume of transportation and the distance of cargo transportation has been maintained in recent years, despite the crisis periods in the economies of the European Union countries. However, the increase in the number of vehicles of fleets is accompanied by an increase in their idle time and delays in the delivery of goods. This phenomenon is explained by the lack of necessary coordination of material flows on the transport network. We considered two types of material flows, namely cargo flows and automobile flows. Both types of flows are discrete in nature. In order to represent the interaction of material flows in the logistics system, the term elementary logistics operation is used, which is the smallest constant element of the logistics chain. Despite the wide variety of processes that occur in logistics systems, the number of typical elementary logistics operations is limited and quite small. For the numerical characterization of material flows, such parameters as a tact, a front, the size of a group of material elements, and the average intensity of the flow are used. Based on the known dependencies between these parameters and taking into account the connections of elementary logistics operations, a structural model of logistics chains is built. It is taken into account that information messages in the logistics system arise when material flows change. The impact of changes in the intensity of cargo flows in logistics chains has been studied and the majority of sources of information messages in space and time have been determined. It has been proven that the use of the objectively necessary amount of information with the necessary advance time makes it possible to reduce dynamic and static delays of cargo flows to a minimum. Due to the fact that changes in the intensity of material flows occur stochastically in logistics chains, the feasibility of assessing the resistance of a given logistics system to external disturbances was developed. The influence of information provision of truck crews performing transport tasks on highway connections is studied. An information support scheme has been developed on the terms of cargo delivery with the need for the truck to arrive at the unloading point on time.

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Section: Analysis and Arrangement Of Information Flowsmentioning

confidence: 58%

“…Ukrainian carriers, for example, are trying to reduce the useless mileage of trucks. Carriers use various information systems for forecasting demand, planning the schedule of individual crews [18][19][20]. However, the information service will not work if it does not have a functional connection with cargo flows.…”

Section: Chaptermentioning

confidence: 99%

Coordination of material and information flows in intercity logistics systems

Oliskevych¹,

Danchuk

Pelo

et al. 2022

Logistics Systems: Technological and Economic Aspects of Efficiency

View full text Add to dashboard Cite

show abstract

“…Additionally, Qu and He used the spatiotemporal network model to predict and control station traffic congestion caused by emergencies. At the same time, they also verified the feasibility of the model [22]. Kang et al conducted many long-term studies on the mechanism of how the temporal and spatial characteristics of traffic accidents for the elderly in Seoul change over time [23].…”

Section: Introductionmentioning

confidence: 75%

Space-Time Evolution of Subway Vulnerability Based on Hypergraph Space

Lü

2020

Mathematical Problems in Engineering

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How to qualitatively and quantitatively evaluate the ability of the whole subway system to maintain the maximum normal operation has become a noteworthy topic. In this study, the hypergraph space structure of Nanjing subway network is used for research. This study uses the method of time-space evolution mechanism to dynamically and quantitatively analyze the gradual change characteristics of Nanjing subway system vulnerability under the influence of time and space. In addition, this study also makes static and dynamic comparative analysis on the vulnerability of a subway system by using connectivity rate and trip efficiency index, which provides new analysis methods and ideas for the study of a subway system network. The results show that although the overall structure of Nanjing’s subway network shows a loose trend, as Nanjing’s subway is still in a rapid development stage, it can be seen from the long-term planning of Nanjing’s subway that the construction of Nanjing’s subway ring line will be strengthened after the completion of the connection between the main city and the suburbs. Therefore, the vulnerability of the subway system should be reduced and the reliability will be improved.

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“…Hetrakul and Cirillo [27,28] first formulated latent class and mixed logit models by internet booking data to analyze railway passenger choice behavior, then proposed a joint optimization model for pricing and seat allocation with the assumption of deterministic demand. All studies of railway revenue management are based on prepared line planning [29], train diagrams [30], and timetables [31]. However, group reservations were not considered in the above literature.…”

Section: Literature Reviewmentioning

confidence: 99%

Joint Decision Model of Group Ticket Booking Limits and Individual Passenger Dynamic Pricing for the High-Speed Railway

Yan

Zhang

et al. 2019

Symmetry

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Rail operators in many countries discount group tickets to improve revenue by increasing price-driven demand. For individual passengers, dynamic pricing is beneficial for maximizing revenue based on the price discrimination principle. Usually, group fares are cheaper than individual fares. If too many group tickets are sold, there will not be enough tickets available to meet high-priced individual demand; by contrast, if not enough group tickets are sold and there is insufficient individual demand, the unsold seats will not have value once the train departs. Therefore, for railway operators, it is worth looking for a balance between group discounts and dynamic pricing to maximize benefits. Essentially, rail operators need to find the symmetry point of the expected revenue between accepting group bookings and reserving tickets for individuals when making decisions. In this study, we formulated a joint decision model of group ticket booking control and dynamic pricing and investigated the effect of the joint decision. The results of numerical experiments showed that incorporating group discounts into dynamic pricing can improve expected revenue when passenger demand is weak, and compared to setting fixed quantities for group tickets, dynamically controlling the limit of group bookings can effectively increase expected revenue. Further analysis of the impacts of time, number of tickets sold, and group demand was helpful to implement the proposed joint policy.

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A Time-Space Network Model Based on a Train Diagram for Predicting and Controlling the Traffic Congestion in a Station Caused by an Emergency

Cited by 7 publications

References 27 publications

Coordination of material and information flows in intercity logistics systems

Coordination of material and information flows in intercity logistics systems

Space-Time Evolution of Subway Vulnerability Based on Hypergraph Space

Joint Decision Model of Group Ticket Booking Limits and Individual Passenger Dynamic Pricing for the High-Speed Railway

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