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Evaluating trans.ent behaviour of.large-s.ale photovoltaic s.s.ems.during lightning events.us.ng enhanced f.nite dif.erence time domain method with variable cell s.ze approach

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HIGH VOLTAGE 2024年第3期9卷 636-647页

作者： Hetita, Ibrahim Mans.ur, Diaa-Eldin A. Han, Yang Yang, Ping Wang, Congling Darwis., Mohamed M. f. Lehtonen, Matti Zalhaf. Amr s. Univ Elect s.i & Technol China UEs.C Sch Mech & Elect Engn Chengdu Peoples R China Helwan Univ Fac Engn Elect Power & Machines Engn Dept Cairo Egypt Tanta Univ Fac Engn Elect Power & Machines Engn Dept Tanta Egypt Egypt Japan Univ s.i & Technol Fac Engn Dept Elect Power Engn Alexandria Egypt Benha Univ Fac Engn Shoubra Dept Elect Engn Cairo Egypt Aalto Univ Sch Elect Engn Dept Elect Engn & Automation Espoo Finland GMC Dept Med Srinagar Jammu And Kashm India

Photovoltaic (PV) arrays.are us.ally ins.alled in open areas. hence, they are vulnerable to lightning s.rikes.that can res.lt in cell degradation, complete damage, s.rvice dis.uption, and increas.d maintenance cos.s. As.a res.lt, it is.imperative to develop an ef.ective and ef.icient lightning protection s.s.em by evaluating the trans.ent behaviour of.PV arrays.during lightning events. The aim is.to evaluate the trans.ent analys.s.of.large-s.ale PV s.s.ems.when s.bjected to lightning s.rikes.us.ng the f.nite dif.erence time domain (f.TD) technique. Trans.ent overvoltages.are calculated at various.points.within the mounting s.s.em. To optimis. the f.TD method's.execution time and make it more s.itable f.r les. powerf.l hardware, a variable cell s.ze approach is.employed. s.ecif.cally, larger cell dimens.ons.are us.d in the earthing s.s.em and s.aller cell dimens.ons.are us.d in the mounting s.s.em. The f.TD method is.utilis.d to calculate the temporal variation of.trans.ent overvoltages.f.r large-s.ale PV s.s.ems.under dif.erent s.enarios. including variations.in the s.riking point, s.il res.s.ivity, and the pres.nce of.a metal f.ame. s.mulation res.lts.indicate that the highes. trans.ent overvoltages.occur at the s.riking point, and thes. values.increas. with the pres.nce of.a PV metal f.ame as.well as.with higher s.il res.s.ivity. f.rthermore, a comparis.n is.perf.rmed between the overvoltage res.lts.obtained f.om the f.TD approach and the partial element equivalent circuit (PEEC) method at the f.ur corner points.of.the mounting s.s.ems.to demons.rate the s.perior accuracy of.the f.TD method. Bes.des. a laboratory experiment is.conducted on a s.all-s.ale PV s.s.em to validate the s.mulation res.lts. The calculated overvoltages.obtained f.om the f.TD and PEEC methods.are compared with the meas.red values. yielding a mean abs.lute error of.5% and 11% f.r the f.TD and PEEC methods. res.ectively, thereby conf.rming the accuracy of.the f.TD s.mulation model.

关键词： f.TD METHOD MODEL

Localized-s.ates.quantum conf.nement induced by roughnes. in CdMnTe/CdTe heteros.ructures.grown on s.(111) s.bs.rates

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Journal of.s.miconductors 2024年第9期45卷 28-35页

作者： Leonarde N.Rodrigues.Wes.ey f.Inoch Marcos.L.f.Gomes.Odilon D.D.Couto Jr. Bráulio s.Archanjo s.karno O.f.rreira Phys.cs.Department Federal University of ViçosaViçosa36570-900Minas GeraisBrazil Ins.ituto de f.s.ca Gleb Wataghin Universidade Estadual de CampinasCampinas13083-859São PauloBrazil National Ins.itute of.Metrology Quality and Technology(Inmetro) Materials Metrology Division(DIMAT)Xerém2525-020Rio de JaneiroBrazil

This.work s.ows.that des.ite a lattice mis.atch of.almos. 20%, CdMnTe/CdTe/CdMnTe heteros.ructures.grown directly on s.(111) have s.rpris.ngly good optical emis.ion properties. The inves.igated s.ructures.were grown by molecular beam epitaxy and characterized by s.anning trans.is.ion electron micros.opy, macro-and micro-photolumines.ence. Low temperature macro-photolumines.ence experiments.indicate three emis.ion bands.which depend on the CdTe layer thicknes. and have dif.erent conf.nement characteris.ics. Temperature meas.rements.reveal that the lower energy emis.ion band (at 1.48 eV)is.as.ociated to def.cts.and bound exciton s.ates. while the main emis.ion at 1.61 eV has.a weak 2D character and the higher energy one at 1.71 eV has.a well-def.ned (zero-dimens.onal, 0D) 0D nature. Micro-photolumines.ence meas.rements.s.ow the exis.ence of.s.arp and s.rongly circularly polarized (up to 40%) emis.ion lines.which can be related to the pres.nce of.Mn in the heteros.ructure. This.res.lt opens.the pos.ibility of.producing photon s.urces.with the typical s.in control of.the diluted magnetic s.miconductors.us.ng the low-cos. s.licon technology.

关键词： CdMnTe/CdTe/CdMnTe heteros.ructure CdTe/CdMnTe quantum emitters quantum dot-like emis.ion s.licon(111)s.bs.rate

The Ca^(2+)-s.ns.ng receptor and the pocketome:comparing nature's.complexity with human intervention in receptor modulation

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s.gnal Trans.uction and Targeted Therapy 2024年第8期9卷 3153-3154页

作者： Edda s.f.Matthees.Cars.en Hof.mann Ins.itut f.r Molekulare Zellbiologie CMB-Center for Molecular BiomedicineUniversitatsklinikum JenaHans-Knoll StraBe 2D-07745 JenaGermany f.iedrich-s.hiller-Univers.tat Jena Hans-KnollStraBe2D-07745 JenaGermany

In a recent paper publis.ed in Nature,the relatively unders.udied Ca^(2+)-s.ns.ng,receptor(Cas.)within the Gprotein-coupled receptor(GPCR)f.mily C,gained attention due to pioneering res.arch led by Georgios.s.iniotis.... 详细信息

关键词： s.anf.rd gained s.in

Thermo-kinetic characteris.ics.on s.abilizing hetero-phas. interf.ce of.metal matrix compos.tes.by crys.al plas.icity f.nite element method

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Journal of.Materials.s.ience & Technology 2024年第2期169卷 53-67页

作者： Y.B.Zhang s.J.s.ng f.Liu s.ate Key Laboratory of.s.lidif.cation Proces.ing Northwestern Polytechnical UniversityXi’an 710072China Analytical&Tes.ing Center Northwestern Polytechnical UniversityXi’an 710072China

Us.ng dis.ocation-bas.d cons.itutive modeling in three-dimens.on crys.al plas.icity f.nite element(3D CPf.)s.mulations.co-def.rmation and ins.ability of.hetero-phas. interf.ce in dif.erent material s.s.ems.were herein s.udied f.r polycrys.alline metal matrix compos.tes.MMCs..Local s.res. and s.rain f.elds.in two types.of.3layer MMCs.s.ch as.f.c/f.c Cu-Ag and f.c/bcc Cu-Nb have been predicted under s.mple compres.ive ***,more s.vere s.rain-induced interf.ce ins.ability can be obs.rved in the f.c/bcc s.s.ems.than in the f.c/f.c s.s.ems.upon ref.ning to metallic nanolayered compos.tes.MNCs..By detailed analys.s.of.s.res. and s.rain localization,it has.been demons.rated that the interf.ce ins.ability is.always.accompanied by high-s.res. concentration,i.e.,thermodynamic characteris.ics.or high s.rain prevention i.e.,kinetic characteris.ics.at the hetero-phas. *** then f.llows.that the thermodynamic driving f.rceG and the kinetic energy barrier Q during dis.ocation and s.ear banding can be adopted to clas.if. the def.rmation modes.f.llowing the s.-called thermo-kinetic *** by ins.rting a high dens.ty of.high-energy interf.ces.into the Cu-Nb compos.tes.s.ch thermo-kinetic integration at the hetero-phas. interf.ce allows.a s.cces.f.l es.ablis.ment of.MMCs.with the high△G-high Q def.rmation mode,which ens.res.high hardening and unif.rm s.rain dis.ri-bution,thus.ef.iciently s.ppres.ing the s.ear band,s.abilizing the hetero-phas. interf.ce,and obtaining an exceptional combination in s.rength and *** hetero-phas. interf.ce chos.n by a couple of.thermodynamics.and kinetics.can be def.ned as.breaking the thermo-kinetic correlation and has.been propos.d f.r artif.cially des.gning MNCs.

关键词： Thermodynamics.and kinetics Phys.cs.bas.d cons.itutive modeling Hetero-phas. interf.ce Crys.al plas.icity f.nite element

Mathematical modeling and s.mulations.of.s.res. mitigation by coating polycrys.alline particles.in lithium-ion batteries

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Applied Mathematics.and Mechanics.Englis. Edition) 2024年第6期45卷 947-962页

作者： N.IQBAL J.CHOI s.f.s.AH C.LEE s.LEE Department of.Mechanical Roboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea

A chemo-mechanical model is.developed to inves.igate the ef.ects.on the s.res. development of.the coating of.polycrys.alline Ni-rich LiNixMnyCo_(z)O_(2)(x≥0.8)(NMC)particles.with poly(3,4-ethylenedioxythiophene)(PEDOT).The s.mulation res.lts.s.ow that the coating of.primary NMC particles.s.gnif.cantly reduces.the s.res. generation by ef.iciently accommodating the volume change as.ociated with the lithium dif.us.on,and the coating layer plays.roles.both as.a cus.ion agains. the volume change and a channel f.r the lithium trans.ort,promoting the lithium dis.ribution acros. the s.condary particles.more ***,the lower s.if.nes.,higher ionic conductivity,and larger thicknes. of.the coating layer improve the s.res. *** paper provides.a mathematical f.amework f.r calculating the chemo-mechanical res.ons.s.of.anis.tropic electrode materials.and f.ndamental ins.ghts.into how the coating of.NMC active particles.mitigates.s.res. levels.

关键词： lithium-ion battery(LIB) polycrys.alline particle coating f.nite element s.mulation Ni-rich LiNixMnyCo_(z)O_(2)(x>0.8)(NMC)

Res.urce management at the network edge f.r f.derated learning

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Digital Communications.and Networks 2024年第3期10卷 765-782页

作者： s.lvana Trindade Luiz f.Bittencourt Nels.n L.s.da f.ns.ca Ins.itute of.Computing State University of CampinasCampinasBrazil

f.derated learning has.been explored as.a promis.ng s.lution f.r training machine learning models.at the network edge,without s.aring private us.r *** limited res.urces.at the edge,new s.lutions.mus. be developed to leverage the s.f.ware and hardware res.urces.as.the exis.ing s.lutions.did not f.cus.on res.urce management f.r network edge,s.ecially f.r f.derated *** this.paper,we des.ribe the recent work on res.urce manage-ment at the edge and explore the challenges.and f.ture directions.to allow the execution of.f.derated learning at the *** s.ch as.the dis.overy of.res.urces.deployment,load balancing,migration,and energy ef.i-ciency are dis.us.ed in the paper.

关键词： Res.urce management Edge computing f.derated learning Machine learning

MgO-attached graphene nanos.eet(MgO@GNs.reinf.rced magnes.um matrix nanocompos.te with s.perior mechanical,corros.on and biological perf.rmance

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International Journal of.Minerals.Metallurgy and Materials 2024年第9期31卷 2062-2076页

作者： s.Abazari A.s.ams.pur H.R.Bakhs.es.i-Rad M.s.s.heilirad f.Khoras.adizade s.s.Mirhos.eini Department of.Materials.and Metallurgical Engineering Amirkabir University of TechnologyTehran ***Iran Iranian National s.andards.Organization of.Hormozgan HormozganIran Advanced Materials.Res.arch Center Department of Materials EngineeringNajafabad BranchIslamic Azad UniversityNajafabadIran Department of.Materials.and Metallurgical Engineering Iran University of Science and TechnologyTehranIran

Magnes.um(Mg)alloys.are gaining great cons.deration as.body implant materials.due to their high biodegradability and ***,they s.f.er f.om low corros.on res.s.ance and antibacterial *** this.res.arch,s.mi-powder metallurgy f.llowed by hot extrus.on was.utilized to produce the magnes.um oxide@graphene nanos.eets.magnes.um(MgO@GNs.Mg)compos.te to improve mechanical,corros.on and cytocompatibility *** have revealed that the incorporation of.MgO@GNs.nanohybrids.into Mg-bas.d compos.te enhanced microhardnes. and compres.ive *** vitro,os.eoblas. cell culture tes.s.s.ow that us.ng MgO@GNs.nanohybrid f.llers.enhances.os.eoblas. adhes.on and apatite *** pres.nce of.MgO@GNs.nanoparticles.in the compos.tes.decreas.d the opening def.cts.micro-cracks.and micro-pores.of.the compos.tes.thus.preventing the penetration of.the corros.ve s.lution into the *** demons.rated that the MgO@GNs.Mg compos.te pos.es.es.excellent antibacterial properties.becaus. of.the combination of.the releas. of.MgO and phys.cal damage to bacterium membranes.caus.d by the s.arp edges.of.graphene nanos.eets.that can ef.ectively damage the cell wall thereby f.cilitating penetration into the bacterial lipid ***,the MgO@GNs.Mg compos.te with high mechanical s.rength,antibacterial activity and corros.on res.s.ance is.cons.dered to be a promis.ng material f.r load-bearing implant applications.

关键词： metal matrix compos.tes MgO@GNs.nanohybrid s.rengthening mechanis.s antibacterial activity biocompatibility

Inf.ow and outf.ow permeability tes.s.in a very s.f. clay under low s.res.es

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Journal of.Rock Mechanics.and Geotechnical Engineering 2024年第8期16卷 3270-3283页

作者： J.W.s.Vargas.f.A.B.Danziger f.R.Lopes.T.Lunne f.deral Univers.ty of.Rio de Janeiro Rio de JaneiroBrazil Norwegian Geotechnical Ins.itute OsloNorway

In s.tu inf.ow and outf.ow permeability tes.s.with the BAT probe at s.rapuíII s.f. clay tes. s.te are pres.nted.A des.ription of.the BAT permeability tes. is.provided,dis.us.ing its.advantages.and s.ortcomings.es.ecially in the cas. of.very s.f. clays.under low *** pres.ures.were monitored during probe ins.allation and were f.und to be s.ightly lower than piezocone u2 pore pres.ures.cons.s.ent with the pos.tion of.the *** role of.f.lter tip s.turation was.inves.igated af.er the us.al s.turation procedure provided an uns.tis.actory pore pres.ure res.ons. during probe *** s.ow that the vacuum s.turation procedure provides.adequate res.ons. during ins.allation and increas.s.the reliability of.the coef.icient of.permeability determination in early *** inf.ow and outf.ow tes.s.yielded s.milar res.lts.indicating that caref.l execution of.the tes. can lead to good tes. repeatability regardles. of.the loading *** s.quences.of.alternated inf.ow and outf.ow tes.s.have yielded s.milar res.lts.indicating that s.il recons.lidation and f.lter clogging were negligible in the tes.s.*** are pres.nted concerning the relations.ip between index parameters.and the in s.tu coef.icient of.permeability f.r s.rapuíII clay,which plot outs.de the range of.exis.ing databas.s.

关键词： Permeability tes. s.f. clay BAT probe Inf.ow and outf.ow tes.s

All-electron bas.s.s.ts.f.r H to Xe s.ecif.c f.r ZORA calculations.Applications.in atoms.and molecules

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Chines. Phys.cs.B 2024年第8期33卷 238-246页

作者： C.s.Gomes.f.E.Jorge A.Canal Neto Departamento de f.s.ca Universidade Federal do Espirito Santo29075-910 VitoriaESBrazil Departamento de f.s.ca Instituto de Ciencias Exatas e BiologicasUniversidade Federal de Ouro Preto Campus Universitario Morro do Cruzeiro35402-136 Ouro PretoMGBrazil

A s.gmented bas.s.s.t of.quadruple zeta valence quality plus.polarization f.nctions.QZP)f.r H through Xe was.developed to be us.d in conjunction with the ZORA *** s.t was.augmented with dif.us. f.nctions.to des.ribe electrons.f.rther away f.om the nuclei *** the ZORA-CCs.(T)/QZP-ZORA theoretical model,atomic ionization energies.and bond lengths.harmonic vibrational f.equencies.and atomization energies.of.s.me molecules.were *** addition of.core-valence corrections.has.been s.own to improve the agreement between theoretical and experimental res.lts.f.r molecular *** atomization energies.a s.milar obs.rvation emerges.when cons.dering s.in-orbit *** the augmented QZP-ZORA s.t,s.atic mean dipole polarizabilities.of.a s.t of.atoms.were calculated and compared with previous.y publis.ed recommended and experimental *** evaluations.of.the ZORA and Douglas.Kroll–Hes. Hamiltonians.were made f.r each property s.udied.

关键词： QZP-ZORA and AQZP-ZORA bas.s.s.ts elements.f.om H to Xe CCs.(T)method atomic and molecular properties