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Magnetic properties of the double perovskite compound sr2YRuO6

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Chinese Physics B 2019年第9期28卷 338-342页

作者： N. EL Mekkaoui s. idrissi s. Mtougui I. EL Housni R. Khalladi s. Ziti H. Labrim L. Bahmad Laboratoire de la Matiere Condensee et des sciences Interdisciplinaires(LaMCscI) Mohammed V UniversityFaculty of SciencesB.P. 1014 RabatMorocco Intelligent Processing and security of systems Mohammed V University in RabatFaculty of SciencesB.P. 1014 RabatMorocco UsM/DERs/ Centre National de l’Energie des Sciences et des Techniques Nucleaires(CNESTEN)RabatMorocco

We study the magnetic properties of the double perovskite ruthenate compound sr2YRuO6 using Monte Carlo simulations(MCs).We elaborate the ground state phase diagrams for all possible and stable *** magnetizations and the susceptibilities as a function of temperature for the studied system are also *** effects of the exchange coupling interactions and the crystal field are examined and *** the other hand, since the compound sr2YRuO6 exhibits an antiferromagnetic behavior, we find its Néel temperature, TN≈ 31 K, which is in good agreement with the experimental results in the *** complete this study, the hysteresis loops and the coercive field as a function of the external magnetic field are also obtained for fixed values of the physical parameters.

关键词： Monte Carlo Ising model antiferromagnetics magnetic properties of nanostructures

Developing a multi-label tinyML machine learning model for an active and optimized greenhouse microclimate control from multivariate sensed data

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Artificial Intelligence in Agriculture 2022年第1期6卷 129-137页

作者： Ilham Ihoume Rachid Tadili Nora Arbaoui Mohamed Benchrifa Ahmed idrissi Mohamed Daoudi solar Energy and Environment Laboratory Mohammed V University in RabatFaculty of SciencesB.P 1014RabatMorocco

In the uncertainties within which the worldwide food security lies nowadays,the agricultural industry is raising a crucial need for being equipped with the state-of-the-art technologies for a more efficient,climate-resilient and sustainable *** traditional production methods have to be revisited,and opportunities should be given for the innovative solutions henceforth brought by big data analytics,cloud computing and internet of things(IoT).In this context,we develop an optimized tinyML-oriented model for an active machine learningbased greenhouse microclimate management to be integrated in an on-field *** design an experimental strawberry greenhouse from which we collect multivariate climate data through installed *** obtained values'combinations are labeled according to a five-action multi-label control strategy,then used to prepare a machine learning-ready *** dataset is used to train and five-fold cross-validate 90 Multi-Layer Perceptrons(MLPs)with varied hyperparameters to select the most performant–yet optimized–model instance for the addressed *** multi-label control approach enables designing highly scalable models with reduced computational complexity,comprising only n control neurons instead of(1+∑n k=1Cn k)neurons(usually generated from a classic single-label approach from n input variables).Our final selected model incorporates 2 hidden layers with 7 and 8 neurons respectively and 151 parameters;it scored a mean accuracy of 97%during the cross-validation phase,then 96%on our supplementary test *** model enables an intelligent and autonomous greenhouse management with the less required *** can be efficiently deployed in microcontrollers within real world operating conditions.

关键词： Agricultural greenhouse Microclimate control Machine learning Optimization TinyML

Biloma Post-Cholecystectomy: A Prudent “Wait-and-see” Approach

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Open Journal of Gastroenterology 2023年第12期13卷 447-452页

作者： Mehdi Bourakkadi idrissi Dkhissi Younes Department of General surgery Haut Atlas Hospital Azilal Morocco Department of Radiology Haut Atlas Hospital Azilal Morocco

Bile duct injury (BDI) is a well-known complication of cholecystectomy and can lead to the formation of a variety of complications, including biloma. Once diagnosed, the appropriate treatment depends on the severity of the condition and can range from minimally invasive procedures to more invasive procedures. We report the case of a 31-year-old woman who exhibited postoperative bile leakage after a cholecystectomy and a CT scan revealed a left hepatic subcapsular biloma. The patient was managed conservatively with close monitoring. The biloma resolved on its own without any intervention. Bilomas are rare complication of cholecystectomy that can be managed conservatively with a wait and see approach, especially in asymptomatic patients. Close monitoring with imaging and laboratory parameters is crucial in the management of these patients.

关键词： Laparoscopic Cholecystectomy Bile Duct Injury Biloma Conservative Treatment

Electrical properties of ^(70)Ge:Ga near the metal–insulator transition

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Journal of semiconductors 2015年第6期36卷 1-5页

作者： M Errai A El kaaouachi H El idrissi Laboratoire MsTI Ecole Supérieure de tecchnologie d'Agadir B.P: 33/S University Ibn ZohrFaculty of Sciences AgadirMorocco Laboratoire Electronique électrotechnique Automatique et Traitement de l'Information Département Génie Electrique Faculté des Sciences et Techniques de Mohammedia Université Hassan II Mohammedia CasablancaBP 146 Quartier YasminaMohammedia

The results of the metal-insulator transition （MIT） induced by impurity concentration are presented in the case of metallic and insulating samples 70Ge：Ga p-type. The eight samples studied have Ga concentrations N ranging from 1.848 × 1017 to 1.912 × 10^17 cm-3. The conductivity measurements were carried out at low temperature in the range 1 to 0.019 K. We provide physical explanations to explain the behaviors of the temperature dependence of the electrical conductivity in both sides of the MIT. The data are for a 70Ge：Ga sample prepared and reported by Itoh et aL in Ref. [Itoh K M, Watanabe M, Ootuka Y, et al. J Phys soc Jpn, 2004, 73（1）： 173].

关键词： 70Ge: Ga semiconductor low temperature impurity concentration metal-insulator variable rangehopping conductivity transport properties

Variable range hopping conduction in n-Cdse samples at very low temperature

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Journal of semiconductors 2015年第12期36卷 14-17页

作者： M Errai A El Kaaouachi H El idrissi Physics Department Ibn Zohr University Faculty of Sciences Laboratoire Electronique électrotechnique Automatique et Traitement de l'Information Département Génie ElectriqueFaculté des Sciences et Techniques de Mohammedia Université Hassan Ⅱ Mohammedia Casablanca

We reanalyzed experimental data already published in Friedman J R, Zhang Y, Dai P, et al. Phys Rev B, 1996, 53（15）： 9528. Variable range hopping （VRH） conduction in the insulating three-dimensional n-Cdse samples has been studied over the entire temperature range from 0.03 to 1 K. In the absence of a magnetic field, the low temperature conductivity a of the three samples （A, B and C） obeys the Mott VRH conduction with an appropriate temperature dependence in the prefactor （a = σ0 exp [- （T0/T）]^p with p ≈ 0.25）. This behavior can be explained by a VRH model where the transport occurs by hopping between localized states in the vicinity of the Fermi level, EF, without creation of the Coulomb gap （CG）. On the contrary, no Efros-shklovskii VRH is observed, suggesting that the density is constant in the vicinity of the EF.

关键词： n-Cdse samples low temperature variable range hopping density of state

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出口多样化对摩洛哥经济增长的影响

出口多样化对摩洛哥经济增长的影响

作者： saad Lakhdar idrissi 江西财经大学

学位级别：硕士

在当今以不稳定和出口收入波动为特征的全球背景下,摩洛哥王国最近显示的经济增长率令人质疑摩洛哥经济的结构动态问题。生产结构的主要特点是多样化不足和出口成熟度指数低。本文的主要目的是使用向量自回归(VAR)模型实证评估出口多样... 详细信息

在当今以不稳定和出口收入波动为特征的全球背景下,摩洛哥王国最近显示的经济增长率令人质疑摩洛哥经济的结构动态问题。生产结构的主要特点是多样化不足和出口成熟度指数低。本文的主要目的是使用向量自回归(VAR)模型实证评估出口多样化对摩洛哥经济增长的影响。这项研究的结果表明,摩洛哥出口的多样化每增加1%,对摩洛哥的经济增长产生0.27%的积极影响。在本文中,我们首先介绍了衡量出口多元化的工具以及我们的研究方法,从而使得我们能够在接下来的研究中分析我们的研究结果。为此,我们试图确定摩洛哥王国维持的主要伙伴关系和协议、主要出口部门以及它如何面对全球化。因此,我们试图分析一些多元化战略以及摩洛哥如何应对国际竞争力战略。尽管表现是积极的,但摩洛哥仍然必须面对障碍,政府必须尽一切努力采取适当的政策从而促进出口多元化。

关键词：摩洛哥出口多样化经济增长

A direct power control of a DFIG based-WECs during symmetrical voltage dips

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Protection and Control of Modern Power systems 2020年第1期5卷 36-47页

作者： sara Mensou Ahmed Essadki Tamou Nasser Badr Bououlid idrissi Research Center of Engineering and Health sciences and Technologies from ENsET Mohammed V UniversityRabatMorocco Research Center of Engineering and Health sciences and Technologies from ENsIAs Mohammed V UniversityRabatMorocco Electromechanical Engineering Department of ENsAM Moulay Ismaïl UniversityMeknèsMorocco.

The Wind Energy Conversion system(WECs)based Doubly Fed Induction Generator(DFIG)has experienced a rapid development in the world,which leads to an increasing insertion of this source of energy in the electrical *** sudden and temporary drop of voltage at the network can affect the operation of the DFIG;the voltage dips produce high peak currents on the stator and rotor circuits,without protection,the rotor side converter(RsC)will suffer also from over-current limit,consequently,the RsC may even be destroyed and the generator be *** this paper a new Direct Power Control(DPC)method was developed,in order to control the stator powers and help the operation of the aero-generator during the faults grid;by injecting the reactive power into the network to contribute to the return of voltage,and set the active power to the optimum value to suppress the high peak *** DPC method was designed using the nonlinear Backstepping(Bs)controller associated with the Lyapunov function to ensure the stability and robustness of the system.A comparison study was undertaken to verify the robustness and effectiveness of the DPC-Bs to that of the classical vector control(VC)using Proportional-Integral(PI)*** were simulated under the simulink®software.

关键词： Wind energy Doubly-fed induction aero-generator Voltage dips DPC strategy Backstepping technique Lyapunov function

Kimura Disease: A Rare Case of Parotid Localization and Review of the Literature (Case Report)

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International Journal of Otolaryngology and Head & Neck surgery 2023年第4期12卷 287-292页

作者： Drissia Benfadil Lachakar Azzedine Fahd El idrissi El Ayoubi Department of Otorhinolaryngology and Head & Neck surgery Oto-Neuro-Ophthalmology Research Laboratory (LRONO) Medicine Faculty University Mohammed I Oujda Morocco

Kimura’s disease is a rare chronic affection of unknown etiology, endemic in the far east with a net male predominance. We present the case of a 37-year-old female patient who developed a tumor process in the left parotid region over a period of 3 years. A total left parotidectomy was performed with simple postoperative course. The anatomopathological study of the surgical specimen was in favor of Kimura’s disease. Through this case and a review of the literature, we present the main clinical, anatomopathological, therapeutic and evolutionary characteristics of this rare disease.

关键词： Kimura Disease Parotid Rare

Comparative study of semiconductor power losses between CsI-based sTATCOM and VsI-based sTATCOM,both used for unbalance compensation

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Protection and Control of Modern Power systems 2020年第1期5卷 56-69页

作者： Anas Benslimane Jamal Bouchnaif Mohammed Essoufi Bekkay Hajji Loukmane el idrissi Laboratory Renewable energy embedded system and information processingNational School of Applied SciencesUniversity of Mohammed IOujdaMorocco Laboratory of Electrical Engineering and Maintenance Higher School of TechnologyUniversity of Mohammed IOujdaMorocco

In this paper,we present a detailed procedure to determine the semiconductor losses for both structures of a shunt sTATCOM(static Compensator),sTATCOM based on Current source Inverter(CsI)and sTATCOM based on Voltage source Inverter(VsI),both used for voltage unbalance *** a first step,we study the VsI-based sTATCOM and the CsI-based sTATCOM used in high speed railway *** we analyze the design and the sizing of the unbalance compensator in order to obtain an unbalance factor that does not exceed the limits imposed by the standards or by the energy *** that,we compare the performances obtained with both structures VsI-sTATCOM and CsI-sTATCOM,after calculating the semiconductor power losses in the sTATCOM ***,we validate our approach by simulation over real data of unbalance compensation caused by the new high-speed railway in *** use the tools MATLAB/simulink/simpowersys for performing our simulations.

关键词： Power losses VsI CsI sTATCOM Unbalance compensation Railway