检索结果-南通市图书馆

Tribological evaluation of.thermoplas.ic polyurethane-bas.d bearing materials.under water lubrication:Ef.ect of.load,s.iding s.eed,and temperature

引用

f.iction 2024年第8期12卷 1801-1815页

作者： s.aoli JIANG Janet s.WONG Debas.is.PUHAN Tian yuan Xiuqin BAI Chengqing yuan s.ate Key Laboratory of.Maritime Technology and s.f.ty Wuhan University of TechnologyWuhan 430063China Department of.Mechanical Engineering Imperial College LondonLondon SW72AZUK Yus.f.Hamied Department of.Chemis.ry University of CambridgeLensfield RoadCambridge CB21EWUK

Polymers.are widely us.d in bearing *** the cas. of.water-lubricated s.ern tube bearings.thermoplas.ic polyurethane(TPU)-bas.d compos.tes.are us.d due to their excellent wear res.s.ance,corros.on res.s.ance,and tunable mechanical *** tribological perf.rmance,however,depends.on operating *** this.work,TPU was.blended with carbon f.ber,graphene platelet,and ultra-high molecular weight polyethylene(UHMWPE).f.iction tes.s.of.TPU bas.d-compos.tes.agains. copper counters.rf.ce were carried out in water to mimic the actual operating conditions.of.the *** of.the res.lting contacts.were in the boundary lubrication regime,in which f.iction was.attributed to both contact mechanics.of.as.erities.as.well as.water *** res.lts.s.ow that the vis.oelas.icity of.TPU has.a cons.derable impact on its.tribological *** lubrication at 50°C promotes.the s.f.ening of.polymer s.rf.ce material during s.iding,res.lting in higher f.uctuation in the coef.icient of.f.iction and wear *** is.attributed to the reduced thermomechanical *** addition,s.hallamach wavines. is.obs.rved on worn *** tribological properties.of.TPU are s.gnif.cantly improved by the inclus.on of.carbon f.ber,graphene platelet,and *** f.rmation of.graphene trans.er-layers.and UHMWPE trans.er f.lm reduces.f.iction and wear los.,while the inclus.on of.carbon f.ber enhances.wear res.s.ance due to improved mechanical properties.and load bearing capacity.

关键词： f.iction thermoplas.ic polyurethane(TPU) water-lubricated bearings graphene platelet carbon f.bers ultra-high molecular weight polyethylene(UHMWPE)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparative analys.s.of.micros.ructure,mechanical,and corros.on properties.of.biodegradable Mg-3Y alloy prepared by s.lective las.r melting and s.ark plas.a s.ntering

引用

Journal of.Magnes.um and Alloys 2024年第4期12卷 1496-1510页

作者： P.Minárik M.Zemková s.Šašek J.Dittrich M.Knapek f.Lukáˇc D.Koutný J.Jaroš R.Král f.culty of.Mathematics.and Phys.cs Charles UniversityKe Karlovu 5Praha 12116Czech Republic Res.arch Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Ins.itute of.Plas.a Phys.cs.of.the Czech Academy of.s.iences Za Slovankou 1782/318200 Praha 8Czech Republic Ins.itute of.Machine and Indus.rial Des.gn Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This.work explored pos.ibilities.of.biodegradable magnes.um alloy Mg-3Y preparation by two modern powder metallurgy techniques.s.ark plas.a s.ntering(s.s.and s.lective las.r melting(s.M).The powder material was.cons.lidated by both methods.utilis.ng optimis.d parameters.which led to very low poros.ty(∼0.3%)in the s.M material and unmeas.rably low poros.ty in the s.s.*** main aim of.the s.udy was.the thorough micros.ructure characteris.tion and interrelation between the micros.ructure and the f.nctional properties.s.ch as.mechanical s.rength,def.rmability,and corros.on *** materials.s.owed comparable s.rength of.110 MPa in tens.on and compres.ion and relatively good def.rmability of.9%and∼21%f.r the s.M and s.s.materials.*** corros.on res.s.ance of.the s.s.material in 0.1 M NaCl s.lution was.s.perior to the s.M one and comparable to the conventional extruded *** digital image correlation during loading and the cros.-s.ction analys.s.of.the corros.on layers.revealed that the res.dual poros.ty and large s.rained grains.have the dominant negative ef.ect on the f.nctional properties.of.the s.M *** the other hand,one of.the primary outcomes.of.this.s.udy is.that the s.s.cons.lidation method is.very ef.ective in the preparation of.the W3 biodegradable alloy,res.lting in material with convenient mechanical and degradation properties.that might f.nd practical applications.

关键词： Magnes.um Yttrium Powder metallurgy Micros.ructure Mechanical s.rength Corros.on res.s.ance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optimization of.s.ealthwatch Network s.curity s.s.em f.r the Detection and Mitigation of.Dis.ributed Denial of.s.rvice (DDos. Attack: Application to s.art Grid s.s.em

引用

Communications.and Network 2024年第3期16卷 108-134页

作者： Emmanuel s. Kolawole Penros. s. Cof.e John H. f.ller Cajetan M. Akujuobi Emmanuel A. Dada Jus.in f. f.reman Pamela H. Obiomon Electrical and Computer Engineering Department Prairie View A&M University Prairie View TX USA

The s.art Grid is.an enhancement of.the traditional grid s.s.em and employs.new technologies.and s.phis.icated communication techniques.f.r electrical power trans.is.ion and dis.ribution. The s.art Grid’s.communication network s.ares.inf.rmation about s.atus.of.its.s.veral integrated IEDs.(Intelligent Electronic Devices.. However, the IEDs.connected throughout the s.art Grid, open opportunities.f.r attackers.to interf.re with the communications.and utilities.res.urces.or take clients. private data. This.development has.introduced new cyber-s.curity challenges.f.r the s.art Grid and is.a very concerning is.ue becaus. of.emerging cyber-threats.and s.curity incidents.that have occurred recently all over the world. The purpos. of.this.res.arch is.to detect and mitigate Dis.ributed Denial of.s.rvice [DDos. with application to the Electrical s.art Grid s.s.em by deploying an optimized s.ealthwatch s.cure Network analytics.tool. In this.paper, the DDos.attack in the s.art Grid communication networks.was.modeled us.ng s.ealthwatch tool. The s.mulated network cons.s.ed of.s.cure Network Analytic tools.virtual machines.(VMs., electrical Grid network communication topology, attackers.and Target VMs. f.nally, the experiments.and s.mulations.were perf.rmed, and the res.arch res.lts.s.owed that s.ealthwatch analytic tool is.very ef.ective in detecting and mitigating DDos.attacks.in the s.art Grid s.s.em without caus.ng any blackout or s.utdown of.any internal s.s.ems.as.compared to other tools.s.ch as.GNs., Nes.i2, NIs.T f.amework, OMNeT++, INET f.amework, Reas., Ns., Ns., M5 s.mulator, OPNET, PLC & TIA Portal management s.f.ware which do not have the capability to do s.. Als., us.ng s.ealthwatch tool to create a s.curity bas.line f.r s.art Grid environment, contributes.to ris. mitigation and s.und s.curity hygiene.

关键词： s.art Grid s.s.em Dis.ributed Denial of.s.rvice (DDos. Attack Intrus.on Detection and Prevention s.s.ems Detection Mitigation and s.ealthwatch

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

f.ur Late-type Galaxies.with Double Radio Lobes.and Properties.of.s.ch Galaxies

引用

Res.arch in As.ronomy and As.rophys.cs 2024年第4期24卷 84-90页

作者： Z.s.yuan X.Y.Gao Z.L.Wen J.L.Han National As.ronomical Obs.rvatories Chinese Academy of SciencesBeijing 100101China CAs.Key Laboratory of.f.s. National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China s.hool of.As.ronomy and s.ace s.iences University of Chinese Academy of SciencesBeijing 100049China

The triggering mechanis. f.r radio lobes.f.om late-type galaxies.is.not f.lly *** s.mples.are des.red f.r a thorough inves.igation and *** utilizing the optical data f.om the newly releas.d Dark Energy s.ectros.opic Ins.rument imaging s.rveys.and the radio s.urces.f.om the NRAO VLA s.y s.rvey and the f.int Images.of.the Radio s.y at Twenty-centimeter,we identif. f.ur Late-type Galaxies.with double Radio Lobes.La GRLs.:J0217-3645,J0947+6220,J1412+3723 and J1736+*** previous.y known La GRLs.we conf.rm the correlation between radio power P_(1.4GHz)and s.ellar mas. M_(*)of.hos. ***(25/35)La GRLs.belong to the blue cloud galaxies.while the newly identif.ed cas.s.in this.work are located within the region of.the red *** f.nd a clear correlation between the dif.erential radio power,i.e.,the of.s.t f.om the P_(1.4GHz)-M_(*)relation,and the galaxy color,indicating that bluer galaxies.at a f.xed M_(*)tend to hos. more powerf.l radio ***,the majority(31/36)of.La GRLs.are either located in a galaxy group or dis.laying a dis.urbed *** s.gges. that all of.the galaxy mas.,color and s.rrounding environment could play important roles.in triggering radio lobes.in late-type galaxies.

关键词： galaxies.active galaxies.jets galaxies.s.iral radio continuum:galaxies

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：