نتایج جستجو برای: stress field
تعداد نتایج: 1202995 فیلتر نتایج به سال:
The global approach in agricultural production is to increase the quantitative and qualitative yield of plants through management methods such as the use of organic fertilizers and reducing the use of chemical fertilizers. This experiment was conducted as a split factorial arrangement with three replications in two folds in Bandarabbas during 2018 and 2019. The main factor included irrigation i...
اجزا بدنه خودرو عموما در معرض بارهای نامتناسب قرار دارند. از آنجا که تخمین عمر اجزا سازه و بدنه خودرو عموما به تغییر وزن و شتاب خودرو و هزینه ساخت و مسائل ایمنی و استحکام و عمر سازه منتهی می گردد، در صنایع طراحی و ساخت خودرو از اهمیت ویژه ای برخوردار است. تئوری های ارائه شده در این زمینه عموما برای اجزاسازه ای تحت بارهای بسیار ابتدایی سینوسی و هندسه اولیه ارائه شده اند، به گونه ای که عمر قطعات ...
Background and objectives One of the main causes of plant growth and development disorders is the presence of adverse environmental conditions such as drought, which leads to stress in plants and endangers their survival. Recent research, however, recommends the use of soil microorganisms, especially plant growth-promoting bacteria, which are involved in plant growth as well as the nutrient cy...
Plant growth is greatly influenced by environmental stresses including water deficit, salinity and extreme temperatures. Therefore, the identification of genes, especially regulatory ones whose expression enables plants to adapt to or to tolerate these abiotic stresses, is very essential. MYB proteins, a superfamily of transcription factors, play regulatory roles in developmental processes and ...
The yield stress of magnetorheological ͑MR͒ fluids depends on the induced solid structure. Since thick columns have a yield stress much higher than a single-chain structure, we improve the yield stress of MR fluids by changing the fluid microstructure. Immediately after a magnetic field is applied, we compress the MR fluid along the field direction. Scanning electron microscopy images show that p...
A (microscopic) static elastoplastic field theory of dislocations with moment stress is considered. The relationship between the moment stress and the Nye tensor is discussed and used for the dislocation Lagrangian. We discuss the stress field of a screw dislocation which is modified in the core region due to the appearance of moment stress.
In this research, effect of drought stress on leaf characteristics was investigated in the experimental field of Miandoab Azad University, Iran using four facultative barley cultivars. Two separate experiments were conducted in pot and field conditions. In both experiments a factorial arrangement was used and the treatments were completely randomized in four replications. In each experiment ha...
We present a derivation of the stress field for an interacting quantum system within the framework of local density functional theory. The formulation is geometric in nature and exploits the relationship between the strain tensor field and Riemannian metric tensor field. The resultant expression obtained for the stress field is gauge-invariant with respect to choice of energy density, and there...
Study of growth condition of medicinal plants under different water stress levels could be as an indicator for cultivation of drought resistance species in water scarce regions. Abiotic stresses such as drought stress are the main limitation factors in crop production and landscape development in arid or semi-arid regions such as Iran. Using drought resistant medicinal plants for developing lan...
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