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REAL PALEY-WIENER THEOREMS FOR THE SPACE-TIME FOURIER TRANSFORM

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Acta Mathematica Scientia 2023年第3期43卷 1105-1115页

作者： youssef el HAOUI Mohra ZAYED Ecole Normale Supérieure(ENS-Meknès) Moulay Ismail UniversityMeknesMorocco Mathematics Department College of ScienceKing Khalid UniversityAbhaSaudi Arabia

This paper presents an extension of certain forms of the real Paley-Wiener theorems to the Minkowski space-time algebra. Our emphasis is dedicated to determining the space-time valued functions whose space-time Fourier transforms(SFT) have compact support using the partial derivatives operator and the Dirac operator of higher order.

关键词： Paley-Wiener theorem Minkowski algebra space-time algebra space-time Fourier transform

Effect of rare earth on physical properties of Na_(0.5)Bi_(0.5)TiO_(3)system:A density functional theory investigation

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Journal of Rare Earths 2022年第3期40卷 473-481,I0005页

作者： Manal Benyoussef Halima Zaari Jamal Belhadi youssef el Amraoui Hamid Ez-Zahraouy Abdelilah Lahmar Mimoun el Marssi Laboratory of Physics of Condensed Matter(LPMC) University of Picardie Jules VerneScientific Pole80039Amiens Cedex 1France Laboratory of Condensed Matter and Indisciplinary Science(LaMCScI) Faculty of ScienceMohammed V UniversityBP 1014RabatMorocco National School of Arts and Crafts Moulay Ismail University50500MeknesMorocco

Na_(0.5)(Bi_(3/4)RE_(1/4))_(0.5)TiO_(3)(RENBT,RE=Nd,Gd,Dy,and Ho)compounds were investigated in the framework of first-principles calculations using the full potential linearized augmented plane wave(FP-LAPW)method based on the spin-polarized density functional theory implemented in the WIEN2k *** charge density distribution and Ti K-edge X-ray absorption spectra reveal that the RENBT compositions with high polarization values are accompanied by a higher TiO_(6)distortion,DyNBT,and NdNBT *** effect of the rare-earth elements on the polarization is confirmed experimentally with the collection of the hysteresis *** investigation of the electronic properties of the compounds highlights the emergence of a magnetization owing to the 4f orbital effect of the rare-earth ***,the investigation of the chemical ordering shows a short-range chemical ordering for the pure composition and an increased A-site disorder for dysprosium doped NBT *** increased disorder may speak for increased relaxor properties in the RE doped compositions.

关键词： Density functional theory Sodium bismuth titanate Rare earths A-site ordering Ferroelectric properties Magnetization

Existence and Regularity of Solution for Strongly Nonlinear p（x）-elliptic Equation with Measure Data

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Journal of Partial Differential Equations 2017年第1期30卷 31-46页

作者： HASSIB moulay Cherif AKDIM youssef AZROUL elhoussine BARBARA Abdelkrim Laboratory LSI Faculty Polydisciplinary of Taza. University Sidi Mohamed Ben Abdellah P. O. Box 1223 Taza Gare Marocco. Laboratory LAMA Faculty of Science dhar El Mahraz Fez. University Sidi Mohamed Ben Abdellah P. O. Box 1796 Atlas Fez Morocco.

The first part of this paper is devoted to study the existence of solution for nonlinear p（x） elliptic problem A（u） =u in Ω, u = 0 on Ω, with a right-hand side measure, where Ω is a bounded open set of RN, N ≥ 2 and A （u） = -div（a （x, u, u）） is a Leray-Lions operator defined from W 0 1,p（x）（Ω） in to its dual W-1,p＇（x）（Ω）. However the second part concerns the existence solution, of the following setting nonlinear elliptic problems A（u）＋g（x,u, u） = u in Ω, u = 0 on Ω. We will give some regularity results for these solutions.

关键词： Sobolev spaces with variable exponents strongly nonlinear p(x)-elliptic equations with measure data regularity.

Optimization Studies of Porous Carbon Preparation from Oil Shale Using Response Surface Methodology and Its Application for Phenol Adsorption

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Chemical Research in Chinese Universities 2020年第6期36卷 1339-1347页

作者： MANSOURI Said MAJDOUBI Hicham HADDAJI Younesse TAMRAOUI youssef elACHABY Mounir MANOUN Bouchaib ABOURRICHE Abdelkrim HANNACHE Hassan OUMAM Mina Materials Science Energy and Nanoengineering Department(MSN) Mohammed VI Polytechnic University(UM6P)Lot 660-Hay Moulay Rachid43150 BenguerirMorocco LIMA T-Thermostructural Materials and Polymers Team Faculty of Science Ben M'sikUniversity HassanⅡof CasablancaBoulevard Cdt Driss HartiBP.7955Ben M'sikCasablancaMorocco Universite Hassan ler Laboratoire des Sciences des Materiauxdes Milieux et de la Modelisation(LS3M)FST SettatMorocco Laboratory Materials ProcessesEnvironment and QualityNational School of Applied SciencesSafiMorocco

This paper discusses the elaboration of adsorbents from oil *** experimental designs a response surface methodology(RSM),which has been applied to optimize the significant preparation factors,such as tempera-ture,time,and the activating agent *** results obtained from central composite design(CCD)revealed that the interaction between the factors was significant for the maximum quantity of adsorption(response).Planned results have shown that a maximum quantity of adsorption for methylene blue is 65 mg/g,which could be achieved with a temperature of 275℃over 2 h and a percentage of the activating agent of 45%.The predicted values agreed with the experimental finding,with a determination coefficient(R2)of *** model has been validated by experi-ments after conditions *** new material(RHO)was characterized by cation exchange capacity,zero charge pH,surface functions,X-ray fluorescence,specific surface area,and electron microscopy *** adsorption was determined using Langmuir,Freundlich and Temkin,which were used to describe the adsorption *** adsorption capacity of the material was about 263 mg/g,and the kinetic studies showed rapid adsorption.

关键词： Oil shale Activated carbon Adsorption Activation process Response surface methodology

A Novel Decoder Based on Parallel Genetic Algorithms for Linear Block Codes

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International Journal of Communications, Network and System Sciences 2013年第1期6卷 66-76页

作者： Abdeslam Ahmadi Faissal el Bouanani Hussain Ben-Azza youssef Benghabrit Department of Communication Networks National High School of Comptuer Science and System Analysis Rabat Morocco Department of Industrial and Production Engineering Moulay Ismail University National High School of Arts and Trades Meknès Morocco

Genetic algorithms offer very good performances for solving large optimization problems, especially in the domain of error-correcting codes. However, they have a major drawback related to the time complexity and memory occupation when running on a uniprocessor computer. This paper proposes a parallel decoder for linear block codes, using parallel genetic algorithms (PGA). The good performance and time complexity are confirmed by theoretical study and by simulations on BCH(63,30,14) codes over both AWGN and flat Rayleigh fading channels. The simulation results show that the coding gain between parallel and single genetic algorithm is about 0.7 dB at BER = 10﹣5 with only 4 processors.

关键词： Channel Coding Linear Block Codes Meta-Heuristics Parallel Genetic Algorithms Parallel Decoding Algorithms Time Complexity Flat Fading Channel AWGN

Solar thermoelectric generator and thermoelectric cooler performance:analysis and comparison using a different shape geometry

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Clean Energy 2023年第6期7卷 1233-1246页

作者： ALkhadher Khalil Smail Sahnoun Ahmed elhassnaoui Said Yadir Abdellatif Obbadi youssef Errami Laboratory:electronics Instrumentation and EnergyFaculty of SciencesChouaib Doukkali UniversityEl JadidaMorocco National School of Applied Sciences—ENSABM Sultan Moulay Slimane University—Beni MallalMorocco Laboratory of Materials ProcessesEnvironment and QualityENSACadi Ayyad UniversitySafiMorocco

Thermoelectric devices are one of the technologies used either to generate electricity by applying a temperature difference using thermal energy or as a heating/cooling system by applying an electrical *** number of materials required to produce a product is an important factor in determining its *** costs associated with these materials,as well as their availability and quality,play a crucial role in price determination by *** this context,a method that employs a uniform volume distribution was *** approach enabled the analysis to focus on other variables,thereby promoting a more precise and relevant evaluation of overall *** on the finite element method,this study investigated the influence of geometric shape,including Rect-leg,Y-leg,Pin-leg and X-leg designs,on the performance of solar thermoelectric generators and thermoelectric *** study was conducted considering the same hot alumina junction surface that receives solar radiation;however,the ef-fective surface,which corresponded to the heat flow area and had a similar area near the exposed surface,varied depending on the chosen leg geometry,thus impacting the heat flux due to the variation in thermal *** the case of a solar thermoelectric generator,the Rect-leg model,having the same effective surface area,presented the lowest heat loss value resulting from convection and radiation in the heat spreader and the hot alumina *** the same conditions,the Y-leg showed the highest *** Rect-leg design generated,by using thermal and optical concentration,the highest output power of 0.028 and 0.054 W,and efficiency of 3.47%and 4.7%,respectively,whereas the Y-leg generated lower values of 0.006523 and 0.018744 W for power,and 2.83%and 2.71%for efficiency,*** the case of the thermoelectric coolers,the Y-leg generated the highest temperature difference between the hot and cold sides of 67.28 K at an electric current value

关键词： solar thermoelectric generators heat loss thermoelectric coolers coefficient of performance leg geometry same leg volume performance

Modeling of Radon and Its Short-Lived Decay Products during Showering: Dose to Adult Members of the Public

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World Journal of Nuclear Science and Technology 2021年第2期11卷 84-99页

作者： Rabi Rabi Lhoucine Oufni Khamiss Cheikh el-Houcine Youssoufi Hamza Badry youssef Errami Department of Physics (LPM) Sultan Moulay Sliman University Beni-Mellal Morocco Department of Physics (LPM) Chouaib Doukkali University El Jadida Morocco

Human exposure to radon inside different parts of the house has become a great concern. In this study, the distribution of radon and its decay inside the shower will be numerically investigated. In fact, the radon concentration in water is measured through the use of AlphaGUARD. They are used as an input for CFD simulation. The numerical results proved that temperature and humidity have significant impacts on both radon content and distribution. Also, the equilibrium factor variations between radon and its progeny with the temperature and relative humidity were carefully looked at. The equivalent doses due to 218Po and 214Po were evaluated in different tissues of the respiratory tract of the members of the public from the inhalation of air inside the shower. The annual effective dose due to radon short lived decay from the inhalation of air inside the shower by the members of the public was also investigated.

关键词： Radon Temperature Shower Computational Fluid Dynamics (CFD) Effective Dose