نتایج جستجو برای: cobbles transport

تعداد نتایج: 273918  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده فنی و مهندسی 1391

در این پایان نامه ابتدا مروری جامع بر مطالعات انجام شده در زمینه تولیدگاز هیدروژن از متان، احتراق گازهای شامل هیدروژن و احتراق با تکنولوژی hitac صورت گرفته است و ویژگیها و کاربردهای روش های مختلف تولید هیدروژن و همچنین احتراق hitac به تفصیل مورد بررسی قرار گرفته است. سپس مدلهای مختلف احتراق، انتقال حرارت تشعشعی و روش های مختلف تولید nox مورد مطالعه قرار گرفت. به منظور بررسی تولید هیدروژن از متا...

N. Talebbeydokhti and M. Nikmanesh,

In this paper, longshore sediment transport in littoral zones is investigated. For investigation of sediment transport in the nearshore zone, the effects of waves, currents and topographical conditions of coast are considered. Linear wave theory was used for the investigation of the wave behaviour. Governing equations of littoral current are continuity and momentum ones. For calculating concent...

Aida Bidžan Boris Avdić Haris Gekić

The article discusses the impact of transport system on economic development in Bosnia and Herzegovina. Transition or the process of restructuring the economy and society in Bosnia and Herzegovina is taking place very intensively, but also in very difficult and special conditions. Construction of new and expansion and reconstruction of existing roads in Bosnia and Herzegovina is the assumption ...

N. Talebbeydokhti and M. Nikmanesh,

In this paper, longshore sediment transport in littoral zones is investigated. For investigation of sediment transport in the nearshore zone, the effects of waves, currents and topographical conditions of coast are considered. Linear wave theory was used for the investigation of the wave behaviour. Governing equations of littoral current are continuity and momentum ones. For calculating concent...

Significant advantages of intermodal and containerized transport have increased the global interest to this mode of transportation. This growing interest is reflected in the annual volume of container cargo growth. However, the container transport inside Iran does not have a proper place. Comparing the count of containers entering and leaving ports with the statistics obtained from railway and ...

Journal: :journal of membrane science and research 0
v.v. belousov a.a. baikov institute of metallurgy and materials, russian academy of sciences, 49 leninskii pr., 119991 moscow, russia s.v. fedorov a.a. baikov institute of metallurgy and materials, russian academy of sciences, 49 leninskii pr., 119991 moscow, russia i.v. kul`bakin a.a. baikov institute of metallurgy and materials, russian academy of sciences, 49 leninskii pr., 119991 moscow, russia

the hybrid molten/solid in2o3 - 30-48 wt.% bi2o3 oxide materials were studied with respect to their transport properties. the conductivities, oxygen ion transport numbers and oxygen permeation fluxes have been measured by using the four-probe dc, volumetric measurements of the faradaic efficiency and gas flow techniques, respectively. we show that the oxygen permeability of the hybrid molten/so...

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...

Journal: :pollution 2015
zahra zangeneh sirdari aminuddin ab. ghani nasim zangeneh sirdari

bedload transport is an essential component of river dynamics and estimation of its rate is important to many aspects of river management. in this study, measured bedload by helley- smith sampler was used to estimate the bedload transport of kurau river in malaysia. an artificial neural network, genetic programming and a combination of genetic programming and a neural network were used to estim...

Journal: :نشریه دانشکده فنی 0
پرویز کوشکی مصطفی ایزدی

recent years have brought a great deal of expansion to the economic systems of developing countries. although they serve as vital link of economic activities, the transportation network of these countries have not grown proportionally. since transportation investments is a a substantial portion of the national budget, a good knowledge of each mode's various characteristics is essential, wh...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2015
Naama Goren-Inbar Gonen Sharon Nira Alperson-Afil Gadi Herzlinger

We report here on the identification and characterization of thin basalt anvils, a newly discovered component of the Acheulian lithic inventory of Gesher Benot Ya'aqov (GBY). These tools are an addition to the array of percussive tools (percussors, pitted stones and anvils) made of basalt, flint and limestone. The thin anvils were selected from particularly compact, horizontally fissured zones ...

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