Mohamed Atounti

Mohamed I University

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Safâa El Ouahabi

Mohamed I University

Ahmed Faize

Mohamed I University

Mohamed Bellouki

Mohamed I University

Soufian Lakrit

Mohamed I University

Anouar Es-saleh

Mohamed I University

Fouad Elotmani

Mohamed I University

Mohamed El Bojaddaini

Mohamed I University

Redouane Esbai

Mohamed I University

Mohammed Bendaoued

Mohamed I University

Mohamed El Haim

Mohamed I University

Cooperative Institutions

Mohamed I University

Abdelmalek Essaâdi University

Mohammed V University

Universidad de Granada

Cadi Ayyad University

Centre National de la Recherche Scientifique

National School of Architecture

Université de Lorraine

Indian Institute of Engineering Science and Technology, Shibpur

Jadavpur University

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An Error Estimate for Finite Volume Method for the Incompressible Navier-Stokes Equations

Mohamed Atounti

We prove in this paper an error estimate for the stationary incompressible Navier-Stokes equations in two dimensions by the cell centered finite volume method. We use the compactness theorem and the discrete

Pressure-correction method

Incompressible Flow

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Design and Analysis of a Dual-Band 27/38 GHz Elliptical-Shaped Patch Antenna for 5G Applications

Journal of Nano- and Electronic Physics (2022)

Anouar Es-saleh Mohammed Bendaoued Rihab Roubhi Soufian Lakrit Sudipta Das

This work describes the design of an elliptical shape patch antenna for 5G applications on a low-cost Rogers RO4003C substrate with a permittivity of 3.55 and a dimension of 14  6  0.2 mm 3 in both bands (27 GHz and 38 GHz).The suggested antenna is made up of a patch with five ellipses and slots of identical shape, as well as a partial ground plane for increased bandwidth.At both bands, the antenna exhibits excellent matching.The results indicate the presence of two resonance frequencies at 27 GHz and 38 GHz that defines two distinct 10 dB return loss bandwidths of 0.490 GHz and 0.420 GHz, respectively.Furthermore, the resulting gain has a good value and is particularly impressive given the structure's small size, with a peak value of 5.731 dB at 26.75 GHz and a peak value of 4.75 dB at 38 GHz.This antenna was studied with the help of Computer Simulation Technology-Microwave Studio (CST).Parametric analyses have been carried out to find out the effect of ground plane length, effect of slot radius and effect of slot position on the performance the proposed antenna in order to provide optimal results.Sufficient impedance bandwidth, preferred unidirectional stable radiation patterns, satisfactory gain, radiation efficiency as well as a miniaturized size make the proposed antenna a suitable candidate for future 5G applications.

Return loss

Ground plane

Patch antenna

Antenna gain

10.21272/jnep.14(5).05017

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Citations (1)

Box Counting Dimension of the Union L of Trinomial Curves When α ≥ 1

Zenodo (CERN European Organization for Nuclear Research) (2019)

Kaoutar Lamrini Uahabi Mohamed Atounti

Trinomial

10.5281/zenodo.2576978

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HMM-GMM based Amazigh speech recognition system

International Journal of Signal and Imaging Systems Engineering (2020)

Safâa El Ouahabi Mohamed Atounti Mohamed Bellouki

This study presents conception and realisation of an automatic independent speech recognition system using hidden Markov model (HMM). The system recognises 33 letters in Amazigh language. System is found well performed and can identify the Amazigh spoken letters at 88, 44% recognition rate, which is well acceptable rate of accuracy for speech recognition. The tests were taken based on the HMM and Gaussian mixture distributions. Hidden Markov toolkit (HTK) has been used in implementation and test phases. The word error rate (WER) came initially to 29.41 and reduced to about 11.52% thanks to extensive testing and change of the recognition's parameters.

Word error rate

10.1504/ijsise.2020.113564

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Citations (2)

An error estimate for finite volume methods for the Stokes equations.

Journal of Inequalities in Pure & Applied Mathematics (2002)

A. Alami-Idrissi Mohamed Atounti

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Citations (2)

A Novel Fractal Patch Antenna Using Defected Ground Structure (DGS) with High Isolation for 5G Applications

Journal of Nano- and Electronic Physics (2023)

Anouar Es-saleh Mohammed Bendaoued Soufian Lakrit Sudipta Das Mohamed Atounti

This paper presents a novel compact circular shaped fractal monopole patch antenna (FMPA) with defected ground structure (DGS).The suggested fractal geometry has been created by using an iterated function system (IFS).The primary aim behind the inclusion of this fractal geometry is used to achieve miniaturization and wideband performance.The complete geometry of the prescribed FMPA for 5G applications is constructed by incorporating fractals with square and star with eight segments; in each segment we create a square with a rotation of 45° from one segment to another.The dimension of proposed fractal geometry is 14  6 mm 2 .The bottom plane of the antenna consists of defected ground structures (DGS) to acquire better isolation and miniaturization.The proposed structure provides a good performance metrics such as gain, and reflection coefficient.The substrate used in this work is Rogers RO4003C, which has a dielectric constant of 3.55, a high of 0.2 mm, and loss tangent of 0.025.Computer Simulation Technology-Microwave Studio (CST) is used to evaluate this antenna.The suggested antenna operates at 26 GHz with an impedance bandwidth of 0.357 GHz along with maximum reflection coefficient of -24.426 dB.The prescribed antenna attains a peak gain of 3.83 dB, maximum radiation efficiency of 95.78 % and desired radiation patterns by maintaining its compact size.

Ground plane

Fractal antenna

Reflection coefficient

HFSS

Patch antenna

10.21272/jnep.15(3).03012

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Citations (1)

A class of central unstaggered schemes for nonlocal conservation laws: Applications to traffic flow models

Boletim da Sociedade Paranaense de Matemática (2024)

S. Belkadi Mohamed Atounti

This study introduces a new class of central unstaggered finite volume methods that are used to approximate solutions to nonlocal conservation laws. The proposed method is based on Nessyahu and Tadmor's (NT). Instead of solving Riemann's problems at the level of cell interfaces, as in the NT scheme, the approach we develop implicitly uses ghost cells while still generating the numerical solution on a single grid. We use our method with the aim of solving one-dimensional nonlocal traffic flow problems. The numerical results we present demonstrate the accuracy, high resolution, and non-oscillatory nature of the proposed method and compare very favorably with those obtained using the original NT method, demonstrating the expected simplicity of a family of unstaggered central schemes and confirming that nonlocal traffic flow models can be treated very efficiently by the suggested method.

Conservation law

10.5269/bspm.63895

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Optimal parameters selected for automatic recognition of spoken Amazigh digits and letters using Hidden Markov Model Toolkit

International Journal of Speech Technology (2020)

Safâa El Ouahabi Mohamed Atounti Mohamed Bellouki

Mel-frequency cepstrum

Realization (probability)

Representation

10.1007/s10772-020-09762-3

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