نتایج جستجو برای: transport costs
تعداد نتایج: 446061 فیلتر نتایج به سال:
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...
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...
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...
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...
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