scholarly journals Dynamic Combined-Mode Traffic Network Model considering Transfer Behaviors

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
ShuGuang Li ◽  
QingHua Zhou
Keyword(s):  
Variational Inequality ◽  
Network Model ◽  
Heuristic Algorithm ◽  
Pure Mode ◽  
Traffic Network ◽  
Transportation Mode ◽  
Numerical Example ◽  
Departure Time ◽  
Queue Model ◽  
Combined Mode

We propose a dynamic combined-mode traffic network model considering transfer behaviors. We assume that travelers can be classified into two classes: one class is pure-mode travelers who complete a trip by single transportation mode, and another is combined-mode travelers who cover a journey by car, bus, and so forth. The multimode point queue model is used to model the interaction of cars and buses on the network. We present an integrated variational inequality formulation to capture the complex traveler choice behaviors such as departure time choices, transfer point, and route choices. Finally, a numerical example is given to illustrate the effectiveness of the proposed heuristic algorithm and model.

Action of Traffic Measures on Supply Chain Network Equilibrium

2014 ◽  
Vol 641-642 ◽  
pp. 866-870
Author(s):  
Wei Cao ◽  
Xi Zhang ◽  
Shou Wen Ji
Keyword(s):  
Supply Chain ◽  
Variational Inequality ◽  
Iterative Algorithm ◽  
Freight Transport ◽  
Network Equilibrium ◽  
Traffic Network ◽  
Supply Chain Network ◽  
Link Capacity ◽  
Numerical Example

The decision of freight transport are typically made for SCNE(Supply Chain Network Equilibrium),and its behavior is known to be influenced by regional conditions of traffic network,but little is known about role of traffic measures which have efficiency on SCNE.Unlike other studies in the extent literature,we aimed to cover the interaction between traffic measures and SCNE. We formulated variational inequality in terms of strategies and strategic flows as SCNE conditions.We employed an iterative algorithm of MSA to this variational inequality by solving a dynamic program.A numerical example proves the validity of our model and algorithm,and we show that our algorithm has faster convergence ability than existing algorithms.Moreover,results show that the amount of products and surpluses of SCN increase as traffic link capacity increases.We conclude that improvement of traffic network could enhance the efficiency of SCN.

scholarly journals Dynamic Traffic Network Model and Time-Dependent Braess’ Paradox

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Chunxue Zhao
Keyword(s):  
Variational Inequality ◽  
Dynamic System ◽  
Network Model ◽  
Equilibrium Condition ◽  
Dynamic Change ◽  
User Equilibrium ◽  
Traffic Network ◽  
Dynamic Traffic ◽  
Braess Paradox ◽  
System Optimal

We propose a dynamic traffic network model and give the equilibrium condition and the equivalent variational inequality of the network. In this model, instead of the influence of inflow rate and output rate on the link congestion, the influence of the adjacent links at the same paths is considered; in this case, the equivalence between the equilibrium condition and the variational inequality is proved. Then we take an example about the paradox using the variational inequality and find that the probability and the severity that Braess’ paradox occurs change with the influence of other links changing. Subsequently, we discuss the influence of other links on whether the adding link works under the dynamic system optimal. At last, we give the relationship between the total congestion under dynamic user equilibrium and that under dynamic system optimal. The results imply that we should take some methods and adjust the interaction between links rationally with the dynamic change of traffic situations.

scholarly journals A three-dimensional elastoplastic analysis of mixed-mode KI/KII around the crack front

2019 ◽  
Vol 300 ◽  
pp. 11002
Author(s):  
Luiz Fernando Nazaré Marques ◽  
Jaime Tupiassú Pinho de Castro ◽  
Luiz Fernando Martha ◽  
Marco Antonio Meggiolaro
Keyword(s):  
Crack Front ◽  
Mixed Mode ◽  
Three Dimensional ◽  
Local Stress ◽  
Mode I ◽  
Pure Mode ◽  
Mode Effects ◽  
Fatigue And Fracture ◽  
Edge Tension ◽  
Combined Mode

Engineering problems that involve fatigue crack growth and fracture frequently can be studied by taking into account only mode-I features. However, many important problems that involve combined mode I and II loadings cannot be properly analyzed by a pure mode-I approach, which in particular may not be sufficient to estimate fracture toughness for practical purposes in such cases. Such mixed-mode problems involve crack orientation and/or load conditions that lead to combined local Stress Intensity Factors (SIFs) KI/KII around the crack front. Using multiaxial crack tip condition characterized by the crack inclination angle βin a mixed-mode KI/KII modified single edge tension SE(T) specimen, such mixed-mode effects on plastic zone shapes, volumes and plastic work UPL are taken into account to evaluate problems that involve fatigue and fracture.

scholarly journals Agent-based day-to-day traffic network model with information percolation

2016 ◽  
Vol 13 (1) ◽  
pp. 38-66 ◽  
Author(s):  
Wenlong Shang ◽  
Ke Han ◽  
Washington Ochieng ◽  
Panagiotis Angeloudis
Keyword(s):  
Network Model ◽  
Traffic Network ◽  
Agent Based
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