Zobrazeno 1 - 10
of 226
pro vyhledávání: '"Noura Yousfi"'
Publikováno v:
Results in Control and Optimization, Vol 14, Iss , Pp 100356- (2024)
Using the recent weighted generalized fractional order operators of Hattaf, a general fractional optimal control problem without constraints on the values of the control functions is formulated and a corresponding (weak) version of Pontryagin’s max
Externí odkaz:
https://doaj.org/article/d962a6ad589d4a398b2e5a768bb3c993
Autor:
Khalid Hattaf, Noura Yousfi
Publikováno v:
Mathematical Biosciences and Engineering, Vol 17, Iss 5, Pp 5326-5340 (2020)
In this paper, we propose a new within-host model which describes the interactions between SARS-CoV-2, host pulmonary epithelial cells and cytotoxic T lymphocyte (CTL) cells. Furthermore, the proposed model takes into account the lytic and nonlytic i
Externí odkaz:
https://doaj.org/article/48261c7c618148b689d98dd624ca889a
Autor:
Khalid Hattaf, Mly Ismail El Karimi, Ahmed A. Mohsen, Zakaria Hajhouji, Majda El Younoussi, Noura Yousfi
Publikováno v:
Vaccines, Vol 11, Iss 2, p 201 (2023)
The emergence of novel RNA viruses like SARS-CoV-2 poses a greater threat to human health. Thus, the main objective of this article is to develop a new mathematical model with a view to better understand the evolutionary behavior of such viruses insi
Externí odkaz:
https://doaj.org/article/31d4e5425f0e4b57822344d73d94c454
Publikováno v:
Mathematics, Vol 10, Iss 19, p 3594 (2022)
Using the Laplace transform method and the convolution theorem, we introduce new and more general definitions for fractional operators with non-singular kernels, extending well-known concepts existing in the literature. The new operators are based on
Externí odkaz:
https://doaj.org/article/bd9b1b868d9b4968acfe6847918946c6
Publikováno v:
Results in Physics, Vol 27, Iss , Pp 104472- (2021)
In this paper, we propose a stochastic SIQR model and discuss the impact of Lévy jumps and Beddington-DeAngelis incidence rate on the transmission of diseases. We prove that our proposed model admits a unique global positive solution and an invarian
Externí odkaz:
https://doaj.org/article/555556fa352c47b0a75e411fc673aa46
Publikováno v:
Complexity, Vol 2021 (2021)
In this paper, we study a stochastic epidemic model with double epidemics which includes white noise and telegraph noise modeled by Markovian switching. Sufficient conditions for the extinction and persistence of the diseases are established. In the
Externí odkaz:
https://doaj.org/article/2e943ce9079844fb9fe29e10c0139761
Publikováno v:
Complexity, Vol 2021 (2021)
The aim of this work is to propose and analyze a new mathematical model formulated by fractional differential equations (FDEs) that describes the dynamics of oncolytic M1 virotherapy. The well-posedness of the proposed model is proved through existen
Externí odkaz:
https://doaj.org/article/b4fa9f1350cb4324a597a3c697602ea6
Publikováno v:
Axioms, Vol 11, Iss 5, p 231 (2022)
We prove a new Taylor’s theorem for generalized weighted fractional calculus with nonsingular kernels. The proof is based on the establishment of new relations for nth-weighted generalized fractional integrals and derivatives. As an application, ne
Externí odkaz:
https://doaj.org/article/143675f1033c4e85b80e2cec12c37b81
Publikováno v:
Axioms, Vol 11, Iss 4, p 178 (2022)
Integration by parts plays a crucial role in mathematical analysis, e.g., during the proof of necessary optimality conditions in the calculus of variations and optimal control. Motivated by this fact, we construct a new, right-weighted generalized fr
Externí odkaz:
https://doaj.org/article/b4e3e9d740d244ffbea83a9027caa5fc
Publikováno v:
Discrete Dynamics in Nature and Society, Vol 2020 (2020)
The purpose of this work is to investigate the dynamic behaviors of the SIRS epidemic model with nonlinear incident rate under regime switching. We establish the existence of a unique positive solution of our system. Furthermore, we obtain the condit
Externí odkaz:
https://doaj.org/article/6d9aad98fd3747dcab3893583f69261c