نتایج جستجو برای: rf method
تعداد نتایج: 1658041 فیلتر نتایج به سال:
the computation of structural failure probability is vital importance in the reliability analysis and may be carried out on the basis of the first-order reliability method using various mathematical iterative approaches such as hasofer-lind and rackwitz-fiessler (hl-rf). this method may not converge in complicated problems and nonlinear limit state functions, which usually shows itself in the f...
In this paper, the feasibility studty of a new method of RF power coupling to acceleration cavity of charged particles accelerator will be evaluated. In this method a slit is created around the accelerator cavity, and RF power amplifier modules is connected directly to the acceleration cavity. In fact, in this design, the cavity in addition to acting as an acceleration cavity, acts as a RF powe...
Steel corrosion of bars in concrete structures is a complex process which leads to the reduction of the cross-section bars and decreasing the resistance of the concrete and steel materials. In this study, reliability analysis of a reinforced concrete beam with corrosion defects under the distributed load was investigated using the enhanced Hasofer-Lind and Rackwitz-Fiessler (EHL-RF) method base...
steel corrosion of bars in concrete structures is a complex process which leads to the reduction of the cross-section bars and decreasing the resistance of the concrete and steel materials. in this study, reliability analysis of a reinforced concrete beam with corrosion defects under the distributed load was investigated using the enhanced hasofer-lind and rackwitz-fiessler (ehl-rf) method base...
The computation of structural failure probability is vital importance in the reliability analysis and may be carried out on the basis of the first-order reliability method using various mathematical iterative approaches such as Hasofer-Lind and Rackwitz-Fiessler (HL-RF). This method may not converge in complicated problems and nonlinear limit state functions, which usually shows itself in the f...
اثر زمان انباشت در تغییر ساختار نانوذرات نقره ساخته شده در بستری از کربن شبهالماسی به روش RF-PECVD
Silver nanoparticles embedded in DLC matrix, were prepared by co-deposition of RF-Sputtering and RF-PECVD method from acetylene gas and sliver target. The RF power and initial pressure of chamber were fixed. Variations of morphology, optical and electrical properties of these films over time were investigated
Background: Rheumatoid factor (RF) is an IgM antibody against the Fc portion of IgG, which together form an immune complex. RF is an important criterion in the diagnosis of early-stage rheumatoid arthritis (RA) and prognosis of RA pathogenesis, as higher levels of RF indicate a higher possibility of more damage. Although 2/3 to 3/4 of patients that undergo ordinary standard tests and have final...
in this paper, the nonlinear conjugate map based on the conjugate hasofer-lind and rackwitz- fiessler (chl-rf) method is applied to evaluate the reliability index using first order reliability method of the embedded noanocompsite beam, which is made from polymer reinforced with carbon nanotubs (cnts). the structure is simulated with timoshenko beam model. the mori-tanaka model is applied for ca...
introduction: one of the major causes of image non-uniformity in mri is due to the existence of non-homogeneity in rf receive and transmit. this can be the most effective source of error in quantitative studies in mri imaging. part of this non-homogeneity demonstrates the characteristics of rf coil and part of it is due to the interaction of rf field with the material being imaged...
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