نتایج جستجو برای: transport costs

تعداد نتایج: 446061  

Journal: :Civil and Environmental Engineering 2018

Journal: :international journal of marine science and engineering 2013
m. mojabi k. hejazi m. karimi

sedimentation is one of the most important problems in harbors that results in considerable economic costs. harbor planforms affects the flow pattern in the harbor basin and consequently, plays an important role in sediment transport and sedimentation. in the present study, a two dimensional depth-averaged hydrodynamic and sediment transport model has been developed to investigate the effect of...

آبرودی, سیدمجتبی, آریانا, محمد, حسینی چشمه ماکانی, سیدتیمور,

One of the management issues in the city of Tehran is urban traffic. In the city of Tehran, population increase and limited resources have resulted in confusion and disorganization in dealing with this matter. Identification of difficulties and effective factors on traffic and transport management of Tehran, particularly dealing with urban sectors, meets the need of city management in a relativ...

Journal: :iranian journal of economic studies 2014
saeed rasekhi marzieh dindar rostami

the purpose of this study is to investigate the factors affecting the manufacturing industry wage among selected developing countries based on new economic geography theory. more specifically, we use a panel data model to study the spatial structure of wages in 136 countries for the period 1998-2007. the results indicate that this theory provides a good description of the spatial structure of w...

Journal: :international journal of transportation engineereing 2014
mahmoud ahmed mousa ali

high speed intercity passenger rail is an inherently strong railway application. it operates over 250 km/hour. for perspective, high-speed represents the ultimate development of preexisting standard gauge infrastructure. network of high-speed passenger rail lines aimed at reducing accident, reducing traffic congestion, air pollution cutting national dependence on foreign oil and improving rural...

Journal: :Journal of Economic Geography 2005

Journal: :The Journal of International Trade & Economic Development 2011

Journal: :Regional Science and Urban Economics 2002

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