scholarly journals A Review on Transit Assignment Modelling Approaches to Congested Networks: A New Perspective

2012 ◽  
Vol 54 ◽  
pp. 1145-1155 ◽  
Author(s):  
Qian Fu ◽  
Ronghui Liu ◽  
Stephane Hess
Keyword(s):  
Transit Assignment ◽  
Congested Networks ◽  
New Perspective ◽  
Modelling Approaches

scholarly journals Learning and Adaptation in Dynamic Transit Assignment Models for Congested Networks

2020 ◽  
Vol 2674 (1) ◽  
pp. 113-124 ◽  
Author(s):  
Oded Cats ◽  
Jens West
Keyword(s):  
Information Provision ◽  
Agent Based Simulation ◽  
Transit Assignment ◽  
Agent Based ◽  
Transit Network ◽  
Passenger Demand ◽  
Congested Networks ◽  
Learning And Adaptation ◽  
Assignment Models ◽  
Different Levels

The distribution of passenger demand over the transit network is forecasted using transit assignment models which conventionally assume that passenger loads satisfy network equilibrium conditions. The approach taken in this study is to model transit path choice as a within-day dynamic process influenced by network state variation and real-time information. The iterative network loading process leading to steady-state conditions is performed by means of day-to-day learning implemented in an agent-based simulation model. We explicitly account for adaptation and learning in relation to service uncertainty, on-board crowding and information provision in the context of congested transit networks. This study thus combines the underlying assignment principles that govern transit assignment models and the disaggregate demand modeling enabled by agent-based simulation modeling. The model is applied to a toy network for illustration purposes, followed by a demonstration for the rapid transit network of Stockholm, Sweden. A full-scale application of the proposed model shows the day-to-day travel time and crowding development for different levels of network saturation and when deploying different levels of information availability.

scholarly journals Modelling Excess Zeros in Count Data: A New Perspective on Modelling Approaches

2021 ◽  
Author(s):  
John Haslett ◽  
Andrew C. Parnell ◽  
John Hinde ◽  
Rafael Andrade Moral
Keyword(s):  
Count Data ◽  
Excess Zeros ◽  
New Perspective ◽  
Modelling Approaches

Algorithm for Equilibrium Transit Assignment Problem

2005 ◽  
Vol 1923 (1) ◽  
pp. 227-235 ◽  
Author(s):  
Abbas Babazadeh ◽  
Hedayat Z. Aashtiani
Keyword(s):  
Assignment Problem ◽  
Large Scale ◽  
Computational Time ◽  
Travel Times ◽  
Transit Assignment ◽  
Solution Algorithms ◽  
Congested Networks ◽  
Solution Methods ◽  
Almost All ◽  
Competitive Algorithms

Transit assignment is an important problem in the literature of transportation. Almost all competitive algorithms in this area are strategy based. For uncongested transit networks, the problem may be formulated into an optimization problem for which good solution algorithms exist. A variational inequality formulation of the problem with several solution methods is also presented in the literature for congested networks. This paper is devoted to solving a transit assignment problem based on complementarity formulation using path flows. The solution algorithm exploits the three concepts of decomposition, path generation, and linearization. The procedure has been applied on a large-scale real-case transit network under fixed travel times as well as flow-dependent dwell times. Computational experiments show rapid convergence of the algorithm. Moreover, for the limited experiments performed, the computational time for the flow-dependent problem is only about twice that of the case for the fixed travel times, without an appreciable excess memory requirement.

SREM observation of the interaction between the in-situ deposited Pd small particles and MgO cleavage surface

1986 ◽  
Vol 44 ◽  
pp. 382-383
Author(s):  
H.-J. Ou
Keyword(s):  
Electron Microscopy ◽  
Small Particle ◽  
Small Particles ◽  
Cleavage Surface ◽  
Metallic Particles ◽  
Microscopy Technique ◽  
Ceramic Surfaces ◽  
Reflection Electron Microscopy ◽  
New Perspective

The understanding of the interactions between the small metallic particles and ceramic surfaces has been studied by many catalyst scientists. We had developed Scanning Reflection Electron Microscopy technique to study surface structure of MgO hulk cleaved surface and the interaction with the small particle of metals. Resolutions of 10Å has shown the periodic array of surface atomic steps on MgO. The SREM observation of the interaction between the metallic particles and the surface may provide a new perspective on such processes.

Articulation Training: A New Perspective

1979 ◽  
Vol 10 (3) ◽  
pp. 145-151 ◽  
Author(s):  
Sallie W. Hillard ◽  
Laura P. Goepfert
Keyword(s):  
Life Experience ◽  
Remediation Measures ◽  
New Perspective

This paper describes the concept of teaching articulation through words which have inherent meaning to a child’s life experience, such as a semantically potent word approach. The approach was used with six children. Comparison of pre/post remediation measures indicated that it has promise as a technique for facilitating increased correct phoneme production.

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