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Wyszukujesz frazę "Abbas, Mohamed" wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Exact solution for heat conduction inside a sphere with heat absorption using the regularized Hilfer-Prabhakar derivative
    Autorzy:
    Elhadedy, Hager
    Latif, Mohamed S. Abdel
    Nour, Hamed M.
    Kader, Abbas H. Abdel
    Powiązania:
    https://bibliotekanauki.pl/articles/2175524.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    fractional derivatives
    Laplace transform
    finite sine-Fourier transform
    heat transfer
    pochodne ułamkowe
    transformata Laplace'a
    skończona transformata sinusoidalna-Fouriera
    wymiana ciepła
    Opis:
    In this article, we utilize the finite Sine-Fourier transform and the Laplace transform for solving fractional partial differential equations with regularized Hilfer-Prabhakar derivative. These transforms are used to get analytical solutions for the time fractional heat conduction equation (TFHCE) with the regularized Hilfer-Prabhakar derivative associated with heat absorption in spherical coordinates. Two cases of Dirichlet boundary conditions are considered by obtaining an analytical solution in each case. The effect of the parameters of the regularized Hilfer-Prabhakar derivative on the heat transfer inside the sphere is discussed using some figures.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 2; 27--37
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upper and lower solutions method for partial discontinuous fractional differential inclusions with not instantaneous impulses
    Autorzy:
    Abbas, Saïd
    Benchohra, Mouffak
    Abdalla Darwish, Mohamed
    Powiązania:
    https://bibliotekanauki.pl/articles/729578.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    fractional differential inclusion
    left-sided mixed Riemann-Liouville integral
    Caputo fractional order derivative
    upper solution
    lower solution
    extremal solution
    fixed point
    Banach algebras
    not instantaneous impulses
    Opis:
    In this paper, we use the upper and lower solutions method combined with a fixed point theorem for multivalued maps in Banach algebras due to Dhage for investigations of the existence of solutions of a class of discontinuous partial differential inclusions with not instantaneous impulses. Also, we study the existence of extremal solutions under Lipschitz, Carath´eodory and certain monotonicity conditions
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2016, 36, 2; 155-179
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low-delay dispersion comparator for level crossing analog to digital converters
    Autorzy:
    Abbas, Mohamed
    Khalil, Kasem
    Powiązania:
    https://bibliotekanauki.pl/articles/972987.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    comparator
    propagation delay dispersion
    level-crossing ADCs
    komparator
    opóźnienie
    Opis:
    This paper presents a cost-effective technique for reducing the delay dispersion of the conventional comparator for level-crossing Analog-to -Digital Converters. Only three transistors, representing a variable driving-current block (VDCB), have been added to the conventional comparator circuit. The VDCB attempts to control the charging behavior of the difference amplifier’ output node. The added block incurs small area overhead and low power consumption compared with the previous works. The proposed circuit has been implemented in MOSIS 130nm technology. The simulation results indicate that the overdrive-related propagation delay dispersion of the proposed technique is reduced to 23% of its counterpart in the conventional comparator. The active area of the proposed circuit is 140.2 μm2 and the power consumption is 227μW at 200MHz. For the sake of scalability check, the proposed circuit is also designed and simulated using 45nm technology. The simulation results came in the same direction, which implies the scalability of the proposed circuit.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2018, 9, 2; 72-78
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solidification/Stabilization Treatment for organic oil immobilization in Algerian Petroleum Drill Cuttings: Optimization and Acceptance Tests for Landfilling
    Autorzy:
    Abbas, Abbas Hadj
    Aissa, Abidi Saad
    Mohamed, Khodja
    Farad, Sagala
    Messaoud, Hacini
    Powiązania:
    https://bibliotekanauki.pl/articles/2203116.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    compressive strength
    Portland cement
    solidification
    stabilisation
    drill cuttings
    Total Petroleum Hydrocarbon
    TPH
    Opis:
    Hassi Messaoud oil field is one of the most important fields in Algeria and the world, because it covers an important quantity of total Crude Oil Production in Algeria. Furthermore, two-thirds of this oil field is underexplored or not explored. Therefore, the drilling process of petroleum wells in this field is a continuous process that results in significant drilling waste. This implies that enormous noxious quantities of drilling waste are produced daily that require treatment via solidification/stabilization (S/S) process before being landfilled. These types of wastes have pollution concentration that significantly exceeds the safety standards. In this study, we focus on the factors affecting the solidification/stabilization treatment of the drill cuttings obtained from Hassi Messaoud oil field and the process optimization. The solidification/stabilization is performed using the cement as binder, and sand, silicate, organophilic clay and activated carbon as additives. The study has been divided into two steps: (i) Determining the optimum ratio of each element used in the S/S process for the organic element (hydrocarbon) elimination, (ii) Combining the optimum ratios found in the previous step to determine the optimal mixture. The obtained results in the first step showed that the optimum ratio for the cement-to-drill cuttings mass ratio is 0.09:1. For the additives-to-drill cuttings mass ratios are 0.04:1, 0.006:1, 0.013:1 and 0.013:1 for the sand, sodium silicate, organophilic clay and activated carbon, respectively. An optimum formula is found whose main finding shows that the hydrocarbon content of our sample is dropped from 9.40 to 1.999%. Many tests’ results such as matrix permeability, resistance to free compression and heavy metals rate before and after S/S process were investigated before landfilling. Besides that, in the light of outcomes achieved by this assessment, these harmful cuttings can be converted into a useful product that helps in reducing the environmental foot prints.
    Źródło:
    Archives of Environmental Protection; 2022, 48, 2; 95--105
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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