Browsing by Author "Shaikh, Asif Ali"

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Citation Count: Tassaddiq, Asifa...et al. (2021). "A New Three-Step Root-Finding Numerical Method and Its Fractal Global Behavior", Fractal and Fractional, Vol. 5, No. 4.
A New Three-Step Root-Finding Numerical Method and Its Fractal Global Behavior
(2021) Tassaddiq, Asifa; Qureshi, Sania; Soomro, Amanullah; Hincal, Evren; Baleanu, Dumitru; Shaikh, Asif Ali; 56389
There is an increasing demand for numerical methods to obtain accurate approximate solutions for nonlinear models based upon polynomials and transcendental equations under both single and multivariate variables. Keeping in mind the high demand within the scientific literature, we attempt to devise a new nonlinear three-step method with tenth-order convergence while using six functional evaluations (three functions and three first-order derivatives) per iteration. The method has an efficiency index of about 1.4678, which is higher than most optimal methods. Convergence analysis for single and systems of nonlinear equations is also carried out. The same is verified with the approximated computational order of convergence in the absence of an exact solution. To observe the global fractal behavior of the proposed method, different types of complex functions are considered under basins of attraction. When compared with various well-known methods, it is observed that the proposed method achieves prespecified tolerance in the minimum number of iterations while assuming different initial guesses. Nonlinear models include those employed in science and engineering, including chemical, electrical, biochemical, geometrical, and meteorological models.
Citation Count: Qureshi, Sania...et al. (2019). "Fractional modeling of blood ethanol concentration system with real data application", Chaos, Vol. 29, No. 1.
Fractional modeling of blood ethanol concentration system with real data application
(Amer Inst Physics, 2019) Qureshi, Sania; Yusuf, Abdullahi; Shaikh, Asif Ali; İnç, Mustafa; Baleanu, Dumitru; 56389
In this study, a physical system called the blood ethanol concentration model has been investigated in its fractional (non-integer) order version. The three most commonly used fractional operators with singular (Caputo) and non-singular (Atangana-Baleanu fractional derivative in the Caputo sense-ABC and the Caputo-Fabrizio-CF) kernels have been used to fractionalize the model, whereas during the process of fractionalization, the dimensional consistency for each of the equations in the model has been maintained. The Laplace transform technique is used to determine the exact solution of the model in all three cases, whereas its parameters are fitted through the least-squares error minimization technique. It is shown that the fractional versions of the model based upon the Caputo and ABC operators estimate the real data comparatively better than the original integer order model, whereas the CF yields the results equivalent to the results obtained from the integer-order model. The computation of the sum of squared residuals is carried out to show the performance of the models along with some graphical illustrations. Published under license by AIP Publishing.
Citation Count: Qureshi, Sania...et al. (2020). "Mathematical modeling for adsorption process of dye removal nonlinear equation using power law and exponentially decaying kernels", Chaos, Vol. 30, no. 4.
Mathematical modeling for adsorption process of dye removal nonlinear equation using power law and exponentially decaying kernels
(2020) Qureshi, Sania; Yusuf, Abdullahi; Shaikh, Asif Ali; İnç, Mustafa; Baleanu, Dumitru; 56389
In this research work, a new time-invariant nonlinear mathematical model in fractional (non-integer) order settings has been proposed under three most frequently employed strategies of the classical Caputo, the Caputo-Fabrizio, and the Atangana-Baleanu-Caputo with the fractional parameter chi , where 0 < chi <= 1. The model consists of a nonlinear autonomous transport equation used to study the adsorption process in order to get rid of the synthetic dyeing substances from the wastewater effluents. Such substances are used at large scale by various industries to color their products with the textile and chemical industries being at the top. The non-integer-order model suggested in the present study depicts the past behavior of the concentration of the solution on the basis of having information of the initial concentration present in the dye. Being nonlinear, it carries the possibility to have no exact solution. However, the Lipchitz condition shows the existence and uniqueness of the underlying model's solution in non-integer-order settings. From a numerical simulation viewpoint, three numerical techniques having first order convergence have been employed to illustrate the numerical results obtained.
Citation Count: Yusuf, Abdullahi...et al. (2018). "Two-strain epidemic model involving fractional derivative with Mittag-Leffler kernel", Chaos, Vol. 28, No. 12.
Two-strain epidemic model involving fractional derivative with Mittag-Leffler kernel
(Amer Inst Physics, 2018) Yusuf, Abdullahi; Qureshi, Sania; İnç, Mustafa; Aliyu, Aliyu Isa; Baleanu, Dumitru; Shaikh, Asif Ali; 56389
In the present study, the fractional version with respect to the Atangana-Baleanu fractional derivative operator in the caputo sense (ABC) of the two-strain epidemic mathematical model involving two vaccinations has extensively been analyzed. Furthermore, using the fixed-point theory, it has been shown that the solution of the proposed fractional version of the mathematical model does not only exist but is also the unique solution under some conditions. The original mathematical model consists of six first order nonlinear ordinary differential equations, thereby requiring a numerical treatment for getting physical interpretations. Likewise, its fractional version is not possible to be solved by any existing analytical method. Therefore, in order to get the observations regarding the output of the model, it has been solved using a newly developed convergent numerical method based on the Atangana-Baleanu fractional derivative operator in the caputo sense. To believe upon the results obtained, the fractional order alpha has been allowed to vary between (0, 1], whereupon the physical observations match with those obtained in the classical case, but the fractional model has persisted all the memory effects making the model much more suitable when presented in the structure of fractional order derivatives for ABC. Finally, the fractional forward Euler method in the classical caputo sense has been used to illustrate the better performance of the numerical method obtained via the Atangana-Baleanu fractional derivative operator in the caputo sense. Published by AIP Publishing.