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Wyszukujesz frazę "Qureshi, Sania" wg kryterium: Autor

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Fox H-functions as exact solutions for Caputo type mass spring damper system under Sumudu transform
    Autorzy:
    Qureshi, Sania
    Powiązania:
    https://bibliotekanauki.pl/articles/1839854.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    special functions
    free damped oscillations
    un-damped oscillations
    driven force
    funkcje specjalne
    operator Caputo
    metoda transformacji Sumudu
    transformacja całkowa Smudu
    rachunek ułamkowy
    Opis:
    Closed form solutions for mathematical systems are not easy to find in many cases. In particular, linear systems such as the population growth/decay model, RLC circuit, mixing problems in chemistry, first-order kinetic reactions, and mass spring damper system in mechanical and mechatronic engineering can be handled with tools available in theoretical study of linear systems. One such linear system has been investigated in the present research study. The second order linear ordinary differential equation called the mass spring damper system is explored under the Caputo type differential operator while using the Sumudu integral transform. The closed form solution has been found in terms of the Fox H-function wherein different aspects of the solution can be obtained with variation in a 2 (1;2] and b 2 (0;1]: The classical mass spring damper model is retrieved for a = b = 1:
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2021, 20, 1; 83-89
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laplace-Carson integral transform for exact solutions of non-integer order initial value problems with Caputo operator
    Autorzy:
    Kumar, Prem
    Qureshi, Sania
    Powiązania:
    https://bibliotekanauki.pl/articles/122736.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    ordinary differential equations
    Laplace transform
    Riemann-Liouville integral
    równanie różniczkowe zwyczajne
    transformacja Laplace'a
    całka Riemann-Liouville
    Opis:
    Finding the exact solution to dynamical systems in the field of mathematical modeling is extremely important and to achieve this goal, various integral transforms have been developed. In this research analysis, non-integer order ordinary differential equations are analytically solved via the Laplace-Carson integral transform technique, which is a technique that has not been previously employed to test the non-integer order differential systems. Firstly, it has proved that the Laplace-Carson transform for n-times repeated classical integrals can be computed by dividing the Laplace-Carson transform of the underlying function by n-th power of a real number p which later helped us to present a new result for getting the Laplace-Carson transform for d-derivative of a function under the Caputo operator. Some initial value problems based upon Caputo type fractional operator have been precisely solved using the results obtained thereof.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 1; 57-66
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using Shehu integral transform to solve fractional order Caputo type initial value problems
    Autorzy:
    Qureshi, Sania
    Kumar, Prem
    Powiązania:
    https://bibliotekanauki.pl/articles/122809.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    ordinary differential equations
    Laplace transform
    Riemann-Liouville integral
    równanie różniczkowe zwyczajne
    transformata Laplace'a
    całka Riemann-Liouville
    Opis:
    In the present research analysis, linear fractional order ordinary differential equations with some defined condition (s) have been solved under the Caputo differential operator having order α > 0 via the Shehu integral transform technique. In this regard, we have presented the proof of finding the Shehu transform for a classical nth order integral of a piecewise continuous with an exponential nt h order function which leads towards devising a theorem to yield exact analytical solutions of the problems under investigation. Varying fractional types of problems are solved whose exact solutions can be compared with solutions obtained through existing transformation techniques including Laplace and Natural transforms.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 2; 75-83
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laplace-Carson integral transform for exact solutions of non-integer order initial value problems with Caputo operator
    Autorzy:
    Kumar, Prem
    Qureshi, Sania
    Powiązania:
    https://bibliotekanauki.pl/articles/1839810.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    ordinary differential equations
    Laplace transform
    Riemann-Liouville integral
    równanie różniczkowe zwyczajne
    transformacja Laplace'a
    całka Riemann-Liouville
    Opis:
    Finding the exact solution to dynamical systems in the field of mathematical modeling is extremely important and to achieve this goal, various integral transforms have been developed. In this research analysis, non-integer order ordinary differential equations are analytically solved via the Laplace-Carson integral transform technique, which is a technique that has not been previously employed to test the non-integer order differential systems. Firstly, it has proved that the Laplace-Carson transform for n-times repeated classical integrals can be computed by dividing the Laplace-Carson transform of the underlying function by n-th power of a real number p which later helped us to present a new result for getting the Laplace-Carson transform for d-derivative of a function under the Caputo operator. Some initial value problems based upon Caputo type fractional operator have been precisely solved using the results obtained thereof.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 1; 57-66
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of Riemann-Liouville, Caputo-Fabrizio, and Atangana-Baleanu integrals
    Autorzy:
    Shaikh, Asif Ali
    Qureshi, Sania
    Powiązania:
    https://bibliotekanauki.pl/articles/2175503.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    fractional operator
    gamma function
    absolute error
    convergence
    operator ułamkowy
    funkcja gamma
    błąd bezwzględny
    konwergencja
    Opis:
    This study analyzes the most commonly used operators of the Riemann-Liouville, the Caputo-Fabrizio, and the Atangana-Baleanu integral operators. Firstly, a numerical scheme for the Riemann-Liouville fractional integral has been discussed. Then, two numerical techniques have been suggested for the remaining two operators. The experimental order of convergence for the schemes is further supported by the computations of absolute relative error at the final nodal point over the integration interval [0, T ]. Comparative analysis of the integrals reveals that the Riemann-Liouville fractional integral yields the most minor errors and the most significant experimental order of convergence in the majority of functions, particularly when the fractional-order parameter α → 0. It is worth noting that the Atangana-Baleanu has proved to be an essential operator for solving many dynamical systems that a single RL operator cannot handle. All of the three integral operators coincide with each other for α = 1. Mathematica 11.3 for an Intel(R) Core(TM) i3-4500U procesor running on 1.70 GHz is used to carry out all the necessary computations.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 1; 91--101
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the use of Mohand integral transform for solving fractional-order classical Caputo differential equations
    Autorzy:
    Qureshi, Sania
    Yusuf, Abdullahi
    Aziz, Shaheen
    Powiązania:
    https://bibliotekanauki.pl/articles/1839755.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    initial value problem
    kinetic reaction
    Riemann-Liouville integral
    transformata całkowa Mohanda
    całka Mohanda
    całka Riemanna-Liouville'a
    reakcja kinetyczna
    Opis:
    In this research study, a newly devised integral transform called the Mohand transform has been used to find the exact solutions of fractional-order ordinary differential equations under the Caputo type operator. This transform technique has successfully been employed in existing literature to solve classical ordinary differential equations. Here, a few significant and practically-used differential equations of the fractional type, particularly related with kinetic reactions from chemical engineering, are under consideration for the possible outcomes via the Mohand integral transform. A new theorem has been proposed whose proof, provided in the present study, helped to get the exact solutions of the models under investigation. Upon comparison, the obtained results would agree with results produced by other existing well-known integral transforms including Laplace, Fourier, Mellin, Natural, Sumudu, Elzaki, Shehu and Aboodh.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 3; 99-109
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new nonlinear L-stable scheme with constant and adaptive step-size strategy
    Autorzy:
    Arain, Sadia
    Qureshi, Sania
    Shaikh, Asif Ali
    Powiązania:
    https://bibliotekanauki.pl/articles/2175496.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    stiff systems
    singular systems
    L-stability
    local error
    order stars
    systemy sztywne
    układ singularny
    stabilność L
    błąd lokalny
    Opis:
    The present study proposes a new explicit nonlinear scheme that solves stiff and nonlinear initial value problems in ordinary differential equations. One of the promising features of this scheme is its fourth-order convergence with strong stability having an unbounded region. A modern approach for relative stability growth analysis is also presented under order stars conditions. The scheme is also good in dealing with singular and stiff type of models. Comparing numerical experiments using various errors, including maximum absolute global error over the integration interval, absolute error at the endpoint, average error, norm of errors, and the CPU times (seconds), shows better performance. An adaptive step-size approach seems to increase the performance of the proposed scheme. The numerical simulations assure us of L -stability, consistency, order, and rapid convergence.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2021, 20, 4; 7--18
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of partial derivatives to derive a convergent numerical scheme with its error estimates
    Autorzy:
    Qureshi, Sania
    Adeyeye, Oluwaseun
    Shaikh, Asif Ali
    Powiązania:
    https://bibliotekanauki.pl/articles/122734.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    multi-derivative
    local truncation error
    stability
    absolute relative errors
    consistency
    principal term
    wielopochodna
    pochodna cząstkowa
    schemat numeryczny
    błąd względny
    błąd bezwzględny
    Opis:
    Using the idea of the partial derivative with respect to the ordinate of a given mathematical function, a new numerical scheme having third order convergence has been devised for solving initial value problems in ordinary differential equations. Such problems are deemed to be indispensable in diverse fields of science, medical and engineering and are most often required to be solved by the numerical schemes. In view of this, the proposed numerical scheme is found to be efficient in solving both autonomous and non-autonomous type of problems as supported by some numerical experiments in the present study. Using the Taylor expansion for the slopes involved in the scheme, the leading term of the local truncation error is shown to have contained Ϭ(h4) which proves third order accuracy of the scheme. In addition to this, consistency and linear stability analysis of the proposed scheme has extensively been discussed. Numerical experiments show better performance of the proposed numerical scheme when compared with existing numerical schemes of the same order as that of the scheme proposed. CPU time (seconds), maximum absolute relative error and the absolute relative error, computed at the last grid point of the integration interval for the associated initial value problem, are the parameters to test the performance of the proposed numerical scheme. MATLAB Version: 9.4.0.813654 (R2018a) in double-precision on a personal computer equipped with a Processor Intel (R) Core(TM) i3-4500U CPU@ 1.70 GHz running under the Windows 10 operating system has been employed in order to carry out all the required numerical computations.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 4; 73-83
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel hybrid iterative method for applied mathematical models with time-efficiency
    Autorzy:
    Jamali, Khalid
    Solangi, Muhammad Anwar
    Qureshi, Sania
    Powiązania:
    https://bibliotekanauki.pl/articles/2202025.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    nonlinear equation
    computational order
    efficiency index
    convergence order
    Newton’s method
    równanie nieliniowe
    Opis:
    Non-linear phenomena appear in many fields of engineering and science. Research on numerical methods is continually extending with the improvement of the latest computing tools. In today’s computational field, one requires maximum achievement in a minimum amount of time. Therefore, there is a need to modify the Newton-type method to achieve higher-order convergence to solve non-linear equations. While the modified methods are expected to be higher-order convergent, the minor computational information and the maximum time efficiency are also important factors. We propose a three-step hybrid iterative method having a non-linear nature. Per iteration, the method requires three function evaluations and three first-order derivatives. The method is theoretically proven to be tenth-order convergent. The mathematical results of the proposed strategy to solve models from fluid dynamics, electric field, and real gases demonstrated better performance. In light of error analysis, computational productivity, and CPU times, the proposed method’s performance is compared to the famous Newton and a recently proposed tenth-order method.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 3; 19--29
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of numerical simulations of blood flow through the segment of an artery in the presence of stenosis
    Autorzy:
    Shaikh, Fozia
    Shaikh, Asif Ali
    Hincal, Evren
    Qureshi, Sania
    Powiązania:
    https://bibliotekanauki.pl/articles/24201504.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    incompressible
    isothermal
    blood flow
    stenosis
    finite element method
    izotermiczność
    przepływ krwi
    zwężenie
    metoda elementów skończonych
    Opis:
    A mathematical model is developed to study the characteristics of blood flowing through an arterial segment in the presence of a single and a couple of stenoses. The governing equations accompanied by an appropriate choice of initial and boundary conditions are solved numerically by Taylor Galerkin’s time-stepping equation, and the numerical stability is checked. The pressure, velocity, and stream functions have been solved by Cholesky’s method. Furthermore, an in-depth study of the flow pattern reveals the separation of Reynolds number for the 30 and 50% blockage of single stenosis and 30% blockage of multi-stenosis. The present results predict the excess pressure drop across the stenosis site than it does for the inlet of the artery with single and multiple stenosis and the increase in the velocity is observed at the center of the artery.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2023, 22, 2; 49--61
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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