نتایج جستجو برای: rk4 method
تعداد نتایج: 1630094 فیلتر نتایج به سال:
ISALT: Inference-based schemes adaptive to large time-stepping for locally Lipschitz ergodic systems
<p style='text-indent:20px;'>Efficient simulation of SDEs is essential in many applications, particularly for ergodic systems that demand efficient both short-time dynamics and large-time statistics. However, locally Lipschitz often require special treatments such as implicit schemes with small time-steps to accurately simulate the measures. We introduce a framework construct inference-ba...
today, scouring is one of the important topics in the river and coastal engineering so that the most destruction in the bridges is occurred due to this phenomenon. whereas the bridges are assumed as the most important connecting structures in the communications roads in the country and their importance is doubled while floodwater, thus exact design and maintenance thereof is very crucial. f...
abstract biometric access control is an automatic system that intelligently provides the access of special actions to predefined individuals. it may use one or more unique features of humans, like fingerprint, iris, gesture, 2d and 3d face images. 2d face image is one of the important features with useful and reliable information for recognition of individuals and systems based on this ...
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
the rationale behind the present study is that particular learning strategies produce more effective results when applied together. the present study tried to investigate the efficiency of the semantic-context strategy alone with a technique called, keyword method. to clarify the point, the current study seeked to find answer to the following question: are the keyword and semantic-context metho...
magnetic resonance imaging (mri) is a notable medical imaging technique that makes of phenomenon of nuclear magnetic resonance. because of the resolution and the technology being harmless, mri has considered as the most desirable imaging technique in clinical applications. the visual quality of mri plays an important role in accuracy of medical delineations that can be seriously degraded by exi...
In an attempt to investigate the structures of ultra-relativistic jets injected into intracluster medium (ICM) and associated flow dynamics, such as shocks, velocity shear, turbulence, we have developed a new special relativistic hydrodynamic (RHD) code in Cartesian coordinates, based on weighted essentially non-oscillatory (WENO) scheme. It is finite difference scheme high spatial accuracy, wh...
Background and Purpose: Studying the effects of suction injection on heat transportation in nanofluids for time-dependent boundary layer flow is a key topic fluid dynamics. Aerodynamics sciences space both make extensive use these types flow. In this research, nanodiamond silver nanoparticles water-type base-fluid are analyzed under thermal radiation non-Fourier theory. Methodology: A mathemati...
Sixth-order compact and non-compact filter schemes that were designed for multiscale Navier-Stokes, and ideal and non-ideal magnetohydrodynamics (MHD) systems are employed to simulate a 2-D Rightmyer-Meshkov instability (RMI). The suppression of this RMI in the presence of a magnetic field was investigated by Samtaney (2003) and Wheatley et al. (2005). Numerical results illustrated here exhibit...
روشهای پانلی (panel method) از بین سایر روشهای محاسبه خصوصیات جریان سیال حول یک جسم، روشهای سریع، کارآمد و مناسبی هستندبر مبنای این روشها، نرم افزارهای متعددی نوشته شده اند که از میان آنها می توان به cmarc ، quadpan ، vsaero ، usaero و ... اشاره کرد. آنچه که در این تحقیق می آید محاسبه ضرایب آیرودینامیکی هواپیمای چهارنفره و تمام کامپوزیت فجر- 3 به کمک نرم افزار cmarc می باشد. پاسخهای به دست آمده...
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