نتایج جستجو برای: differential system
تعداد نتایج: 2461036 فیلتر نتایج به سال:
The objective of this study is to present a mathematical modeling and solution approach for the drying process of spheroidal solids with the application of microwave in capillary porous media based on the Luikov equations, composed of a system of linear and coupled partial differential equations arising from the energy, mass and pressure balances inside the solid matrix. Additionally, the power...
it is known that a stochastic dierential equation (sde) induces two probabilisticobjects, namely a diusion process and a stochastic ow. while the diusion process isdetermined by the innitesimal mean and variance given by the coecients of the sde,this is not the case for the stochastic ow induced by the sde. in order to characterize thestochastic ow uniquely the innitesimal covariance give...
in this paper, we investigate the application of the homotopy perturbation method (hpm) for solving a one-dimensional nonlinear inverse heat conduction problem. in this problem the thermal conductivity term is a linear function with respect to unknown heat temperature in bounded interval. furthermore, the temperature histories are unknown at the end point of the interval. this problem is ill-po...
تحقیق حاضر در سه مرحله به تهیه و ارزیابی نانو الیاف حاوی داروی سیپروفلوکساسین هیدروکلراید(ciphcl)، به منظور التیام زخم های پوستی و سوختگی های بسیار شدید ،از پلیمر های زیست تخریب پذیر پلی وینیل الکل و پلی وینیل استات ، پرداخته است.بدین منظور در مرحله ی اول 5 مخلوط از محلول های pvac:pva با نسبت های جرمی 0:100 ، 25:75 ، 50:50 ، 75:25 و 100:0 ،در حلال های آبکی اسید استیک 40% ، 50% و 60% تهیه و سپس ...
it is commonly accepted that fractional differential equations play an important role in the explanation of many physical phenomena. for this reason we need a reliable and efficient technique for the solution of fractional differential equations. this paper deals with the numerical solution of a class of fractional differential equation. the fractional derivatives are described...
The nonlinear bending behavior of sector graphene sheets is studied subjected to uniform transverse loads resting on a Winkler-Pasternak elastic foundation using the nonlocal elasticity theory. Considering the nonlocal differential constitutive relations of Eringen theory based on first order shear deformation theory and using the von-Karman strain field, the equilibrium partial differential eq...
the application of e-learning systems - as one of the solutions to the issue of anywhere and anytime learning – is increasingly spreading in the area of education. content management - one of the most important parts of any e-learning system- is in the concern of tutors and teachers through which they can obtain means and paths to achieve the goals of the course and learning objectives. e-learn...
A meshless numerical technique is proposed for solving the generalized variable coefficient Schrodinger equation and Schrodinger-Boussinesq system with electromagnetic fields. The employed meshless technique is based on a generalized smoothed particle hydrodynamics (SPH) approach. The spatial direction has been discretized with the generalized SPH technique. Thus, we obtain a system of ordinary...
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