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Bi-objective optimal active and reactive power flow management in grid-connected AC/DC hybrid microgrids using metaheuristic-PSO

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Clean Energy 2023年第6期7卷 1356-1380页

作者： Ssadik Charadi Houssam eddine Chakir Abdelbari Redouane Abdennebi El Hasnaoui Mehdi Et-taoussi Electronics Power and Control Team Mohammadia School of Engineers(EMI)Mohammed V UniversityRabatMorocco SMARTiLab Moroccan School of Engineering Sciences(EMSI)RabatMorocco EEIS-Lab ENSET MohammediaHassan II UniversityCasablancaMorocco Ecole des mines de Rabat(ENSMR) RabatMorocco

In the context of evolving energy needs and environmental concerns,efficient management of distributed energy resources within microgrids has gained *** paper addresses the optimization of power flow management in a hybrid AC/DC microgrid through an energy management system driven by particle swarm *** traditional approaches that focus solely on active power distribution,our energy management system optimizes both active and reactive power allocation among *** leveraging 24-hour-ahead forecasting data encompassing load predictions,tariff rates and weather conditions,our strategy ensures an economically and environmentally optimized microgrid *** proposed energy management system has dual objectives:minimizing costs and reducing greenhouse gas *** optimized operation of polluting sources and efficient utilization of the energy storage system,our approach achieved significant cost savings of~15%compared with the genetic algorithm *** was largely attributed to the streamlined operation of the gas turbine system,which reduced fuel consumption and associated ***,particle swarm optimization maintained the efficiency of the gas turbine by operating at~80%of its nominal power,effectively lowering greenhouse gas *** effectiveness of our proposed strategy is validated through simu-lations conducted using the MATLAB®software environment.

关键词： distributed energy resources hybrid AC/DC microgrids particle swarm optimization renewable energy cost reduction

Enhancing resource allocation in edge and fog-cloud computing with genetic algorithm and particle swarm optimization

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Intelligent and Converged Networks 2023年第4期4卷 273-279页

作者： Saad-eddine Chafi Younes Balboul Mohammed Fattah Said Mazer Moulhime El Bekkali the Laboratory of Artificial Intelligence Data Sciences and Emerging SystemsNational School of Applied SciencesSidi Mohamed Ben Abdellah UniversityFez 30000Morocco the LIA Laboratory Moulay Ismail UniversityMeknes 50050Morocco

Evolutionary algorithms have gained significant attention from researchers as effective solutions for various optimization *** Algorithm(GA)is widely popular due to its logical approach,broad applicability,and ability to tackle complex issues encountered in engineering ***,GA is known for its high implementation cost and typically requires a large number of *** the other hand,Particle Swarm Optimization(PSO)is a relatively new heuristic technique inspired by the collective behaviors of real *** GA and PSO algorithms are prominent heuristic optimization methods that belong to the population-based approaches *** they are often seen as competitors,their efficiency heavily relies on the parameter values chosen and the specific optimization problem at *** this study,we aim to compare the runtime performance of GA and PSO algorithms within a cutting-edge edge and fog cloud *** extensive experiments and performance evaluations,the authors demonstrate the effectiveness of GA and PSO algorithms in improving resource allocation in edge and fog cloud computing scenarios using FogWorkflowSim *** comparative analysis sheds light on the strengths and limitations of each algorithm,providing valuable insights for researchers and practitioners in the field.

关键词： particle swarm optimization genetic algorithm performance evaluation edge and fog cloud FogWorkflowSim

FRACTIONAL HALANAY INEQUALITY AND APPLICATION IN NEURAL NETWORK THEORY

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Acta Mathematica Scientia 2019年第6期39卷 1605-1618页

作者： Nasser-eddine TATAR King Fahd University of Petroleum and Minerals Department of Mathematics and Statistics

The (integer order) Halanay inequality with distributed delays is extended to the fractional order case. It is proved that solutions decay to zero as a Mittag-Leffler function as time goes to infinity provided that the delay feedback are bounded by similar *** application to a problem arising in neural network theory is provided showing that the equilibrium is Mittag-Leffler stable.

关键词： Hopfield neural network Mittag-Leffler stability Caputo fractional derivative fractional Halanay inequality

From azoospermia to macrozoospermia,a phenotypic continuum due to mutations in the ZMYND15 gene

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Asian Journal of Andrology 2022年第3期24卷 243-247页

作者： Zine-eddine Kherraf Caroline Cazin Florence Lestrade Jana Muronova Charles Coutton Christophe Arnoult Nicolas Thierry-Mieg Pierre F Ray Univ.Grenoble Alpes INSERM U1209CNRS UMR 5309Institute for Advanced BiosciencesTeam Genetics Epigenetics and Therapies of InfertilityGrenoble 38000France CHU Grenoble Alpes UM GI-DPIGrenoble 38000France CHR Metz Thionville Hospital 1 allée ChâteauMETZ 57000France CHU Grenoble Alpes UM of Chromosomic GeneticsGrenoble 38000France Univ.Grenoble Alpes CNRSTIMC-IMAGGrenoble F-38000France

Thanks to tremendous advances in sequencing technologies and in particular to whole exome sequencing(WES),many genes have now been linked to severe sperm defects.A precise genetic diagnosis is obtained for a minority of patients and only for the most severe defects like azoospermia or macrozoospermia which is very often due to defects in the aurora kinase C(AURKC)***,we studied a subject with a severe oligozoospermia and a phenotypic diagnosis of *** analysis did not reveal any deleterious *** was then initiated which permitted to identify a homozygous loss of function variant in the zinc finger MYND-type containing 15(ZMYND15)***15 has been described to serve as a switch for haploid gene expression,and mice devoid of ZMYND15 were shown to be sterile due to nonobstructive azoospermia(NOA).In man,ZMYND15 has been associated with NOA and severe *** confirm here that the presence of a bi-allelic ZMYND15 variant induces a severe *** addition,we show that severe oligozoospermia can be associated macrozoospermia,and that a phenotypic misdiagnosis is possible,potentially delaying the genetic *** conclusion,genetic defects in ZMYND15 can induce complete NOA or severe oligozoospermia associated with a very severe *** our experience,severe oligozoospermia is often associated with severe teratozoospermia and can sometimes be misinterpreted as macrozoospermia or *** these instances,specific AURKC or dpy-19 like 2(DPY19L2)diagnosis is usually negative and we recommend the direct use of a pan-genomic techniques such as WES.

关键词： azoospermia gene defect macrozoospermia male infertility

Removal of ofloxacin antibiotic using heterogeneous Fenton process over modified alginate beads

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Journal of Environmental Sciences 2016年第7期28卷 84-93页

作者： Hana Titouhi Jamel-eddine Belgaied Laboratory of Analytical Chemistry and Electrochemistry National Institute of Applied Sciences and Technology INSAT Carthage University

The aim of this work is to study the heterogeneous oxidative degradation of ofloxacin antibiotic using a composite material prepared from sodium alginate and cyclohexane dinitrilo tetraacetic acid（CDTA）. The characterization tests indicated the successful incorporation of metal chelator and iron. It was also demonstrated that the synthesized beads are mesoporous. The influence of several experimental parameters（i.e.： H2O2 dose,working temperature, beads loading and initial drug concentration） on the process performances was evaluated. The reaction temperature significantly affects the drug conversion efficiency. It was also observed that the synthesized material was efficient toward the target antibiotic degradation in the presence of small quantities of hydrogen peroxide. Under optimum conditions（0.05 g of granules, initial drug concentration = 10 mg/L,25 μL of 10 mmol/L H2O2）, conducted in a batch reaction, 94% degradation of ofloxacin was reached. The results also indicate that the composite material showed a reasonable stability;a relatively low decrease of activity after four successive runs（only 9%） and a negligible iron leaching（0.8%） have been observed. The synthesized composite material offered interesting advantages in terms of simplicity, good stability, ease of recovery from the liquid medium after use and its efficiency in the presence of low quantities of oxidant. It constitutes a good candidate in the water treatment area.

关键词： Sodium alginate CDTA Heterogeneous Fenton Ofloxacin Degradation

Weighted product Hardy space associated with operators

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Frontiers of Mathematics in China 2020年第4期15卷 649-683页

作者： Qingquan DENG Djalal eddine GUEDJIBA School of Mathematics and Statistics Hubei Province Key Laboratory of Mathematical PhysicsCentral China Normal UniversityWuhan 430079China Department of Mathematics University of Batna 253 Route de ConstantineFesdisBatna 05078Algeria

Assuming that the operators L1,L2 are self-adjoint and e-tLi(i=1,2)satisfy the generalized Davies-Gaffney estimates,we shall prove that the weighted Hardy space H1L1,L2,w(Rn1×Rn2)associated to operatorsL1,L2 on produ... 详细信息

关键词： Produce Hardy space Ap weights Davies-Gaffney estimates

Friction welding influence on microstructure,microhardness and hardness behavior of CrNiMo steel(AISI 316)

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China Welding 2023年第3期32卷 21-27页

作者： Ammar Jabbar Hassan Billel Cheniti Brahim Belkessa Taoufik Boukharouba Djamel Miroud Nacer-eddine Titouche Advanced Mechanics Laboratory(LMA) Houari Boumediene University of Sciences and TechnologyEl Alia 16111Bab EzzouarAlgiersAlgeria Research Center in Industrial Technologies Algiers 16014Algeria Science and Engineering Materials Laboratory(LSGM) Houari Boumediene University of Sciences and TechnologyEl Alia 16111Bab EzzouarAlgiersAlgeria Birine Nuclear Research Center Ain OusseraDjelfa 17200Algeria

For joining high Cr,Ni and Mo austenitic stainless steel(AISI 316)by direct drive friction welding(DDFW),with friction weld-ing conditions:rotation speed of 3000 r/min,friction time of 10 s,friction pressure of 130 MPa,forge time of 5 s and forge pressure of 260 *** results of microstructure showed that the temperature at the interface reached 819℃while forge applied between 357-237℃,which subdivided welded joint into four distinct regions of highly plastically deformed zone(HPDZ),thermo-mechanically affected zone(TMAZ),heat affected zone(HAZ)and the base metal,with grain size about 10µm,100µm,90µm and 30µm *** re-gions were created due to dynamic recrystallization(DRX)at the interface and thermo-mechanical deformation with heat diffusion in the neighboring ***,high level of microhardness about 300 HV0.1 and hardness roughly 240 Hv10 at the interface due to HPDZ creation while low level of 240 HV0.1 for microhardness and moderately of 205 HV10 for hardness in neighboring regions.

关键词： friction welding austenitic stainless steel microstructure microhardness hardness

Resolution of Unity of Generalized Bargmann Spaces by means of Displaced Fock states

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Chinese Physics Letters 2002年第11期19卷 1576-1578页

作者： Nour eddine Askour Zouhaïr Mouayn Department of Mathematics Faculty of Sciences and Technics (M'Ghila) BP 523 Béni Mellal 23000 Morocco

We resolve the unity of generalized Bargmann spaces in Cn [J. Math. Phys. 41(2000)3507] by means of displaced Fock states.

关键词： REPRODUCING KERNELS EXPLICIT FORMULAS

Comparison of Parallel Kinematic Machines with Three Translational Degrees of Freedom and Linear Actuation

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Chinese Journal of Mechanical Engineering 2015年第4期28卷 841-850页

作者： PRAUSE Isabel CHARAF eddine Sami CORVES Burkhard Department of Mechanism Theory and Dynamics of Machines RWTH Aachen University

The development of new robot structures, in particular of parallel kinematic machines（PKM）, is widely systematized by different structure synthesis methods. Recent research increasingly focuses on PKM with less than six degrees of freedom（DOF）. However, an overall comparison and evaluation of these structures is missing. In order to compare symmetrical PKM with three translational DOF, different evaluation criteria are used. Workspace, maximum actuation forces and velocities, power, actuator stiffness, accuracy and transmission behavior are taken into account to investigate strengths and weaknesses of the PKMs. A selection scheme based on possible configurations of translational PKM including different frame configurations is presented. Moreover, an optimization method based on a genetic algorithm is described to determine the geometric parameters of the selected PKM for an exemplary load case and a prescribed workspace. The values of the mentioned criteria are determined for all considered PKM with respect to certain boundary conditions. The distribution and spreading of these values within the prescribed workspace is presented by using box plots for each criterion. Thereby, the performance characteristics of the different structures can be compared directly. The results show that there is no ＂best＂ PKM. Further inquiries such as dynamic or stiffness analysis are necessary to extend the comparison and to finally select a PKM.

关键词： parallel kinematic machines comparison benchmark selection scheme