Browsing by Author "Srivastava H.M."

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    A new modified semi-analytical technique for a fractional-order Ebola virus disease model
    (Springer-Verlag Italia s.r.l., 2021) Srivastava H.M.; Deniz S.
    Ebola virus disease is a fatal hemorrhagic fever of humans and primates caused by viruses. There are many mathematical models to investigate this viral disease. In this paper, the classical form of the Ebola virus disease model has been modified by using new fractional derivatives. The resulting fractional forms of the Ebola virus disease model have then been examined by applying a newly-developed semi-analytical method. The optimal perturbation iteration method has been implemented to obtain new approximate solutions to the system of differential equations which better model the Ebola virus disease. New algorithms are constructed by using three types of operators of fractional derivatives. A real-world problem is also solved in order to prove the efficiency of the proposed algorithms. A good agreement has been found with the real values of the parameters. Finally, several graphical illustrations are presented for different values of the involved biological parameters to show the effects of the new approximate solutions. Obtained results prove that the new method is highly accurate in solving these types of fractional models. © 2021, The Royal Academy of Sciences, Madrid.
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    An efficient semi-analytical method for solving the generalized regularized long wave equations with a new fractional derivative operator
    (Elsevier B.V., 2021) Srivastava H.M.; Deni̇z S.; Saad K.M.
    In this work, the newly developed optimal perturbation iteration technique with Laplace transform is applied to the generalized regularized long wave equations with a new fractional operator to obtain new approximate solutions. We transform the classical generalized regularized long wave equations to fractional differential form by using the Atangana-Baleanu fractional derivative which is defined with the Mittag-Leffler function. To show the efficiency of the proposed method, a numerical example is given for different values of physical parameters. © 2021 The Author(s)