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Numerical and Experimental Study of the Impact of Key Parameters on a PVT Air Collector:Mass Flow Rate and Duct Depth

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Journal of Thermal Science 2021年第5期30卷 1625-1642页

作者： Ismail BAKLOUTI Zied driss National School of Engineers of Monastir University of Monastir5019MonastirTunisia Laboratory of Electromechanical Systems(LASEM) National School of Engineers of SfaxUniversity of Sfax3038SfaxTunisia

The PVT-air solar system simultaneously generates electrical and thermal ***,increasing the cost-effectiveness of the system requires an appropriate choice of key parameters such as mass flow rate and air channel *** this paper,a PVT-air kit of a single module with a 30°slope was used to measure photovoltaic electricity and air heating power in the city of Sfax,***,a computer method was implemented using the ANSYS Fluent 17.0 software and the MATLAB program to analyse the properties of the airflow and to characterise PVT-air yields under different mass flow rates and *** the comparison of numerical and experimental data,the numerical method was validated with a good ***,we have found that increasing of the airflow rate improves the thermal efficiency with a slight change on electrical ***,the reduction in depth shows an improvement on thermal efficiency and a negligible effect on electrical ***,we have presented the thermal and electrical performance of PVT-air as a function of the key parameters with the Hottel-Whillier-Bliss formulation.

关键词： solar energy PVT-air thermal experimental numerical performance

Stabilization of an axially moving tape system with boundary disturbances via the ADRC approach

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Control Theory and Technology 2022年第3期20卷 349-360页

作者： My driss Aouragh Mohamed Nahli Maths Department AM2CSI GroupMSISI LaboratoryFST ErrachidiaMoulay Ismail University of MeknesPO.BOX 509 BoutalamineErrachidia52000Drâa-TafilaletMorocco AM2CSI Group MSISI LaboratoryFST ErrachidiaMoulay Ismail University of MeknesPO.BOX 509 BoutalamineErrachidia52000Drâa-TafilaletMorocco

In this paper,the boundary stabilization problem of an axially moving tape system is *** tape moves between two sets of rollers,where the right roller is fixed and the left roller,with its mass taken into account,is free to move,rotate,and subject to external *** active disturbance rejection control approach is adopted in the ***,extended state observers are designed to estimate the disturbances,and then,feedback controllers are proposed to cancel the effect of the *** well-posedness of the closed-loop system is proved by the semigroup ***,the exponential stability is achieved by constructing a suitable Lyapunov ***,numerical simulations are given to support these results.

关键词： Axially moving beam Hybrid system Active disturbance rejection control Boundary disturbances Exponential stabilization

On Crossed Product Algebras over Henselian Valued Fields

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Algebra Colloquium 2020年第3期27卷 389-404页

作者： driss Bennis Karim Mounirh Faculty of Sciences Research Center CeReMAR Mohammed V University in RabatRabatMorocco

Let D be a tame central division algebra over a Henselian valued field E,D be the residue division algebra of D,E be the residue field of E,and n be a positive *** prove that M_(n)(D)has a strictly maximal subfield which is Galois(resp.,abelian)over E if and only if M_(n)(D)has a strictly maximal subfield K which is Galois(resp.,abelian)and tame over E withГ_(K)■Г_(D),whereГ_(K)andГ_(D)are the value groups of K and D,*** partially generalizes the result proved by Hanke et *** 2016 for the case n=1.

关键词： (graded)Brauer group valued division algebras Henselization graded division algebras gauges

Surface Weather Parameters Forecasting Using Analog Ensemble Method over the Main Airports of Morocco

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Journal of Meteorological Research 2022年第6期36卷 866-881页

作者： Badreddine ALAOUI driss BARI Yamna GHABBAR Direction Generale de la Meteorologie Centre National de Recherches Meteorologique(CNRM)Casablanca BP 8106Morocco Department of Mathematics Computer Sciences and GeomaticsHassania School for Public WorksCasablanca P.O.Box 8108Morocco

Surface weather parameters detain high socioeconomic impact and strategic insights for all users,in all domains(aviation,marine traffic,agriculture,etc.).However,those parameters were mainly predicted by using deterministic numerical weather prediction(NWP)models that include a wealth of *** purpose of this study is to contribute in improving low-cost computationally ensemble forecasting of those parameters using analog ensemble method(AnEn)and comparing it to the operational mesoscale deterministic model(AROME)all over the main airports of Morocco using 5-yr period(2016-2020)of hourly *** analog for a given station and forecast lead time is a past prediction,from the same model that has similar values for selected predictors of the current model *** analogs verifying observations form AnEn ensemble *** picture seasonal dependency,two configurations were set;a basic configuration where analogs may come from any past date and a restricted configuration where analogs should belong to a day window around the target ***,a new predictors weighting strategy is developed by using machine learning techniques(linear regression,random forest,and XGBoost).This approach is expected to accomplish both the selection of relevant predictors as well as finding their optimal weights,and hence preserve physical meaning and correlations of the used weather *** analysis shows that the developed AnEn system exhibits a good statistical consistency and it significantly improves the deterministic forecast performance temporally and spatially by up to 50%for Bias(mean error)and 30%for RMSE(root-mean-square error)at most of the *** improvement varies as a function of lead times and seasons compared to the AROME model and to the basic AnEn *** results show also that AnEn performance is geographically dependent where a slight worsening is found for some airports.

关键词： analog ensemble machine learning surface weather parameters ensemble forecasting AROME(Applications de la Rechercheàl’OpérationnelàMéso-Echelle) predictors weighting strategy

Gorenstein n-X-Injective and n-X-Flat Modules with Respect to a Special Finitely Presented Module

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Algebra Colloquium 2021年第4期28卷 673-688页

作者： Mostafa Amini Arij Benkhadra driss Bennis Department of Mathematics Faculty of Sciences Payame Noor UniversityTehranIran Department of Mathematics Faculty of Sciences Mohammed V University in RabatRabatMorocco

Let R be a ring,X a class of R-modules and n≥1 an *** intro-duce the concepts of Gorenstein n-X-injective and n-X-flat modules via special finitely presented ***,we obtain some equivalent properties of these modules on n-X-coherent *** we investigate the relations among Gorenstein n-X-injective,n-X-flat,injective and fiat modules on X-FC-rings(i.e.,self n-X-injective and n-X-coherent rings).Several known results are generalized to this new context.

关键词： n-X-coherent ring Gorenstein n-X-injective module Gorenstein module

Relative(n,k)-Weak Cotorsion Modules

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Algebra Colloquium 2024年第3期31卷 481-498页

作者： Mostafa Amini Houda Amzil driss Bennis Department of Mathematics Faculty of SciencesPayame Noor UniversityTehranIran Department of Mathematics Faculty of Sciences EI Jadida Chouaib Doukkali UniversityMorocco Department of Mathematics Faculty of Sciences Mohammed V University in RabatMorocco

Let R be a ring and n,k be two non-negative *** an extension of several known notions,we introduce and study(n,k)-weak cotorsion modules using the class of right R-modules with n-weak fat dimensions at most *** exampl... 详细信息

关键词： (n,k)-weak cotorsion module n-weak injective module n-weak fat module n-super finitely presented module

ON THE SUPERSTABILITY OF THE PEXIDER TYPE GENERALIZED TRIGONOMETRIC FUNCTIONAL EQUATIONS

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Acta Mathematica Scientia 2014年第6期34卷 1749-1760页

作者： driss ZEGLAMI Ahmed CHARIFI Samir KABBAJ Department of Mathematics E.N.S.A.M Moulay Ismail University Department of Mathematics Faculty of SciencesIbn Tofail University

The aim of this paper is to investigate the superstability problem for the pexiderized trigonometric functional equation∑ v∈Φ∫Kf（xkv（y）k^-1）dwK（k）= Φ g（x）h（y）, x, y ∈ G,where G is any topological group, K is a compact subgroup of G, ωK is the normalized Haar measure of K, Φ is a finite group of K-invariant morphisms of G and f, g, h are continuous complex-valued ***, we have generalized the results of stability for d＇Alembert＇s and Wilson＇s equations by R. Badora, J. Baker, B. Bouikhalene, P. Gavruta, S. Kabbaj, Pl. Kannappan, G. ***, J.M. Rassias, A. Roukbi, L. Sz′ekelyhidi, D. Zeglami, etc.

关键词： superstability generalized Pexider d'Alembert equation Wilson's functional equation group of morphisms

Editorial comment:a review on radiofrequency,microwave and high-intensity focused ultrasound ablations for hepatocellular carcinoma with cirrhosis

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Hepatobiliary Surgery and Nutrition 2022年第3期11卷 453-456页

作者： Merve Ozen driss Raissi Division of Vascular and Interventional Radiology Department of RadiologyUniversity of KentuckyLexingtonKYUSA

We read with great interest the article by Cheung et al.(1)recently published in Hepatobiliary Surgery and Nutrition,presenting a narrative review of various ablation systems for hepatocellular carcinoma(HCC)in cirrhotic *** would like to provide several *** would first like to offer our congratulations to the authors for their review,which extensively discusses radiofrequency(RFA),high-intensity focused ultrasound(HIFU),and microwave ablation(MWA)ablation *** review is a succinct summary to better understand the utility of various ablation techniques used in HCC treatment(1).

关键词： Surgery hepatocellular

The Category of Modules on an n-Trivial Extension: the Basic Properties

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Algebra Colloquium 2020年第3期27卷 607-620页

作者： Dirar Benkhadra driss Bennis J.R.Garcia Rozas CeReMAR Center Faculty of Sciences Mohammed V University in RabatRabatMorocco Departamento de Matematicas Universidad de Almeria 04071 AlmenaSpain

In this paper we investigate a categorical aspect of n-trivial extension of a ring by a family of ***,we introduce the right(resp.,left)n-trivial extension of a category by a family of *** other results,projective,injective and flat objects of this category are characterized,and two applications are presented at the end of this *** characterize when an n-trivial extension ring is k-perfect and establish a result on the self-injective dimension of an n-trivial extension ring.

关键词： trivial extension of rings n-trivial extension of abelian categories