نتایج جستجو برای: 158175 rials to road construction costs

تعداد نتایج: 10716978  

One of the most important  natural hazards which threatens  the roads in mountainous regions are hillslope instabilities. This phenomenon is more frequent while  the roads are under construction.  Indentification of dangerous and susceptible areas to mass movement is especially important in order to implement some measures to control these natural phenomena.In this study mass movement hazard zo...

Providing healthy food and protecting sources from pollution has been one of the concerns of human societies and decision – making centers so that protecting food from pollution, detecting sources of pollution and measuring them become important. Because of nutritive and political significance of grape in this area, extensive use of leaf and fruit of this plant, developing urban areas around gr...

Journal: :مجله علوم اعصاب شفای خاتم 0
roshanak moradi iranian society for surgery of the hand, tehran, iran

it’s obvious that road safety is causing large problems and costs in iran with an enormous impact on the well-being of people, economy and productivity. the yearly number of fatalities and injuries is still unchanged. motor vehicle injuries lead the list of injury deaths at the all ages during childhood and adolescence, even in children under 1 yrs of age. understanding the actual of child road...

2011
B. Saavedra-Moreno Sancho Salcedo-Sanz A. Paniagua-Tineo J. Gascón-Moreno José Antonio Portilla-Figueras

In this paper we present a novel evolutionary algorithm for optimal positioning of wind turbines in wind farms. We consider a realistic model for the wind farm, which includes orography, shape of the wind farm, simulation of the wind speed and direction, and costs of installation, connection and road construction among wind turbines. Several experiments show that the proposed evolutionary appro...

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During the construction of road networks large area of forests and rangelands will be destroyed in the road path and its margins. This process causes massive amount of soil and rock move from its site and on adjacent lands will be accumulated, that causes increasing environmental degradation. One of the most important problems due to forest roads making is increasing of different erosion forms ...

Journal: :ماشین های کشاورزی 0
غلامرضا رابط هوشنگ بهرامی محمدجواد شیخ داوودی

delay in irrigated wheat primary tillage operations causes yield reduction and hidden timeliness cost in fars province. mechanization of primary tillage operations for irrigated wheat in fars province was simulated using system dynamics approach. a part of the model structure was related to the agricultural operations timeliness costs. for the mentioned simulation, causal relations between syst...

ژورنال: مرتع 2022

Traditional livestock  husbandry is based on the use of rangeland. According to the existing reports on the imbalance of incomes and expenses of rangeland-based livestock husbandry in the country; Financial evaluation of traditional rangeland-based livestock husbandry is essential. The aim of this study was to evaluate and economically analyze traditional rangeland-based livestock husbandry in ...

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Soil erosion is of the most important environmental challenges and factors of forest damage, which is, occur because of the land use change, road construction and lack of vegetation cover. Forest soil is naturally penetrable but forest roads are not. This issue causes the flows runoff on road surface and washes soil particles. Thus, forest roads must be planned and constructed accurately. So, t...

2009
Nashwan Dawood Serafim Castro

Road construction projects are very expensive, unpredictable and highly influenced by unpredictable factors, like weather, type of soil, environmental issues, and other factors. This has led to difficulties in developing accurate construction plans and modelling the construction operation using a traditional simulation system. In this context, the aim of this research is to create a knowledge d...

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