نتایج جستجو برای: Hub and Spoke

تعداد نتایج: 16828932  

Journal: :international journal of industrial engineering and productional research- 0
vorya zarei , department of industrial engineering, mazandaran university of science and technology, babol, iran iraj mahdavi , department of industrial engineering, mazandaran university of science and technology, babol, iran reza tavakkoli-moghaddam , department of industrial engineering, college of engineering, tehran university, tehran, iran nezam mahdavi-amiri faculty of mathematical science, sharif university of technology, tehran, iran

the existing works considering the flow-based discount factor in the hub and spoke problems, assume that increasing the amount of flow passing through each edge of network continuously decreases the unit flow transportation cost. although a higher volume of flow allows for using wider links and consequently cheaper transportation, but the unit of flow enjoys more discounts, quite like replacing...

J. Nematian

HLP (hub location problem) tries to find locations of hub facilities and assignment of nodes to extended facilities. Hubs are facilities to collect, arrange, and distribute commodities in telecommunication networks, cargo delivery systems, etc. Hubs are very crucial and their inaccessibility impresses on network whole levels. In this paper, first, total reliability of the network is defined bas...

Iraj Mahdavi, Nezam Mahdavi-Amiri, Reza Tavakkoli-Moghaddam, Vorya Zarei,

The existing works considering the flow-based discount factor in the hub and spoke problems, assume that increasing the amount of flow passing through each edge of network continuously decreases the unit flow transportation cost. Although a higher volume of flow allows for using wider links and consequently cheaper transportation, but the unit of flow enjoys more discounts, quite like replacing...

Journal: :Operations Research 2013
John Gunnar Carlsson Fan Jia

The hub-and-spoke distribution paradigm has been a fundamental principle in geographic network design for more than 40 years. One of the primary advantages that such networks possess is their ability to exploit economies of scale in transportation by aggregating network flows through common sources. In this paper, we consider the problem of designing an optimal hub-and-spoke network in continuo...

Journal: :Cerebral cortex 2013
Kai Hwang Michael N Hallquist Beatriz Luna

Functional hubs are brain regions that play a crucial role in facilitating communication among parallel, distributed brain networks. The developmental emergence and stability of hubs, however, is not well understood. The current study used measures of network topology drawn from graph theory to investigate the development of functional hubs in 99 participants, 10-20 years of age. We found that ...

2006
Paul W. Bauer James Keeler Randall W. Eberts

Introduction The Airline Deregulation Act (ADA) of 1978 caused many changes in the industry. For the first time in 40 years, new airlines were permitted to enter the industry, and all airlines could choose the routes they would serve and the fares they would charge. Airlines were also free to exit the industry (go bankrupt), if they made poor choices in these matters. Naturally, this has led to...

2017
James K. Elrod John L. Fortenberry

BACKGROUND The healthcare industry is characterized by intensive, never-ending change occurring on a multitude of fronts. Success in such tumultuous environments requires healthcare providers to be proficient in myriad areas, including the manner in which they organize and deliver services. Less efficient designs drain precious resources and hamper efforts to deliver the best care possible to p...

Journal: :the international journal of humanities 2014
mahdi bashiri aida omidvar reza tavakkoli-moghaddam

the hub location decision is a long term investment and any changes in it take considerable time and money. in real situations, some parameters are uncertain hence, deterministic models cannot be more efficient. the ability of two-stage stochastic programming is to make a long-term decision by considering effects of it in short term decisions simultaneously. in the two-stage stochastic programm...

Journal: :Review of Finance 2021

Abstract Regulators often delegate monitoring to local supervisors, which can improve information collection, but also lead agency problems and capture. We document that following the closure of a US bank regulator’s field offices, banks they previously supervised actively increased their risk failure by distributing cash, increasing leverage, lending more than similar at same time place. Super...

Journal: :The RAND Journal of Economics 1997

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