نتایج جستجو برای: density current management
تعداد نتایج: 1911496 فیلتر نتایج به سال:
چکیده ندارد.
Soil quality includes two general points of view intrinsic characteristics and the dynamic nature of soil that is influenced by human activities and management decisions. Therefore, in this study, changes of soil quality indicators under two management approaches, including corporate management and condominium management, were assessed. At first, the study area was identified by using the image...
In this study, removal of methylene blue by electro-coagulation method using aluminum and iron electrodes was investigated. The influence of the operating parameters such as contact time, current density, anode type, inter-electrodes distance, initial and final pH and energy consumption rate was determined. Dye removal was increased with increases in solution pH, current density and c...
The shape and geometry of the flow field have considerable effects on the transfer rate of the reactants toward the catalyst layer and consequently the performance of the polymer electrolyte membrane (PEM) fuel cell. In this study, a novel PEM fuel cell with pin-type flow field is proposed in order to reduce the wake regions, increase the oxygen transfer rate into the catalyst layer and the cur...
optimal forest road density based on skidding and road construction costs in iranian caspian forests
information on the productivity, costs and applications of the logging system is a key component in the evaluation of management plans for the rehabilitation and utilization of caspian forests. skidding and road construction costs are expensive forest operations. determining the optimum forest road network density is one of the most important factors in sustainable forest management. logging me...
This paper has examined the analytical solution of steady fully developed natural convective flow of a viscous incompressible and electrically conducting fluid between vertical channel by taking the Hall current and induced magnetic field into account. We have obtained the non-dimensional simultaneous ordinary differential equations using the suitable non-dimensional variables and parameters in...
In this work, a tracer study on pore initiation in anodic alumina in oxalic acid was performed. Effects of some experimental parameters such as applied electrical potential, electrolyte composition and heat pretreatment were evaluated. Electrochemical and morphological experiments were performed using potentiostatic anodizing and scanning electron microscopy (SEM) techniques, respectively. Effe...
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