نتایج جستجو برای: fractional derivatives and integrals

تعداد نتایج: 16866483  

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده علوم پایه 1390

چکیده : * در یک واکنش تک ظرفی و با استفاده از واکنش آلدهید های آروماتیک و 3- متیل 1- فنیل پیرازولین-5- ان با نسبت مولی 1:1، ساختارهای هتروسیکل پیرازول سنتز شد. از مزایای آن، انجام واکنش در دمای اتاق، عدم نیاز به کاتالیزور، بازده بالای واکنش، استفاده از آب بعنوان حلال سبز و بی خطر به جای حلال های آلی وسمی می باشد . * توانستیم با استفاده از ملدرام اسید ومشتقات 2- هیدروکسی بنزآلدهید، ترکی...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم پایه 1392

در این پایان نامه به بررسی دستگاه مستقل از زمان لورنز که یک دستگاه سه بعدی و غیر خطی می-باشد، می پردازیم. با تغییر روابط بین پارامترهای دستگاه، رفتارهای مختلفی که نقاط تعادل دستگاه از خود نشان می دهند را بررسی می کنیم. سپس با انتخاب یک پارامتر مناسب انشعاب، نشان می دهیم که یک انشعاب هاف در این دستگاه اتفاق می افتد. به همین منظور ابتدا دستگاه های معادلات دیفرانسیل به عنوان یک دستگاه پویا را بررس...

Journal: :Filomat 2021

Here we consider the ordinary and fractional approximation of functions by sublinear positive operators with applications to generalized convolution type expressed integrals such as Choquet Shilkret ones. The is under differentiability Caputo, Canavati Iterated-Caputo types. We produce Jackson inequalities basic initial conditions. So our way quantitative producing their right hand sides involv...

Journal: :The journal of mathematics and computer science 2022

The advancements of integral inequalities with the help fractional operators have recently been focus attention in theory inequalities. In this study, we first review some fundamental concepts, and then using \(k\)-conformable integrals, establish a new identity for differentiable functions. Then, considering as an auxiliary result, several Ostrowski-type are presented functions whose modulus d...

Journal: :Fractal and fractional 2022

In this paper, we study the existence of positive solutions for a system fractional differential equations with ?-Laplacian operators, Riemann–Liouville derivatives diverse orders and general nonlinearities which depend on several integrals differing orders, supplemented nonlocal coupled boundary conditions containing Riemann–Stieltjes varied derivatives. The from are continuous nonnegative fun...

2006
Vasily E. Tarasov

In this paper we consider the gravitational field of fractal distribution of particles. To describe fractal distribution, we use the fractional integrals. The fractional integrals are considered as approximations of integrals on fractals. Using the fractional generalization of the Gauss’s law, we consider the simple examples of the fields of homogeneous fractal distribution. The examples of gra...

Journal: :Fractional Calculus and Applied Analysis 2022

In this paper, we deal with the convolution series that are a far reaching generalization of conventional power and fractional exponents including Mittag-Leffler type functions. Special attention is given to most interesting case generated by Sonine kernels. first formulate prove second fundamental theorem for general integrals $n$-fold sequential derivatives both Riemann-Liouville Caputo types...

Journal: :Computers & Mathematics with Applications 2013
Guofei Pang Wen Chen K. Y. Sze

Fractional directional integrals are the extensions of the Riemann-Liouville fractional integrals from oneto multi-dimensional spaces and play an important role in extending the fractional differentiation to diverse applications. In numerical evaluation of these integrals, the weakly singular kernels often fail the conventional quadrature rules such as Newton-Cotes and Gauss-Legendre rules. It ...

2013
Shy-Der Lin Chia-Hung Lu

*Correspondence: [email protected] Department of Applied Mathematics, Chung Yuan Christian University, Chung-Li, 32023, Taiwan, R.O.C. Abstract In recent years, various operators of fractional calculus (that is, calculus of integrals and derivatives of arbitrary real or complex orders) have been investigated and applied in many remarkably diverse fields of science and engineering. Many authors...

Journal: :SIAM J. Scientific Computing 2017
Fanhai Zeng Zhiping Mao George E. Karniadakis

We develop spectral collocation methods for fractional differential equations with variable order with two end-point singularities. Specifically, we derive three-term recurrence relations for both integrals and derivatives of the weighted Jacobi polynomials of the form 1 x μ1 1 Æ x 2P a,b j x a, b, μ1, μ2 Æ1 , which leads to the desired differentiation matrices. We apply the new differentiation...

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