检索结果-南通市图书馆

Effect of col.-w.rking on corrosion induced damage in l.g joints

在线全文

学校读者我要写书评

暂无评论

Defence Tech.ol.gy（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.M.N Ch.kmath.l. Murth. h. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical.Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

l.g joints are preferred joineries for transferring h.avy l.ads to parent components in aerospace *** experience corrosion due to environmental.conditions,improper surface finish.s and rubbing displ.cement betw.en th. pin and *** causes damage of different sizes and sh.pes near th. *** degradation due to corrosion-induced damage is model.ed as a th.ough.pit at one of th. identified critical.l.cations th.ough.stress *** effect of th.s pit on fatigue crack initiation l.fe is ***-h.l. is pre-stressed by col.-w.rking and th. benefits of inducing pl.stic w.ke on th. intended performance of th. l.g joint during th. damages due to corrosion are brough. out and compared w.th.non-col.-w.rked *** anal.sis is performed on th.s l.g joint w.th.*** resul.s obtained h.gh.igh. th. benefits of col.-w.rking and th. meth.dol.gy can be extended to damage grow.h.and anal.se th. effect of surface treatments for better structural.integrity of components of aerospace veh.cl.s.

关键词： l.g joint Corrosion Crack initiation Col.-w.rking Structural.integrity

Th. quasi-Gramian sol.tion of a non-commutative extension of th. h.gh.r-order nonl.near Sch.?dinger equation

在线全文

学校读者我要写书评

暂无评论

Communications in Th.oretical.Ph.sics 2024年第3期76卷 51-61页

作者： h.w.A Riaz J l.n Department of Ph.sics Zhejiang Normal UniversityJinhua 321004China

Th. nonl.near Sch.?dinger(Nl.)equation,w.0}ch.incorporates h.gh.r-order dispersive terms,is w.del. empl.yed in th. th.oretical.anal.sis of various ph.sical.*** th.s study,w. expl.re th. non-commutative extension of th. h.gh.r-order Nl. *** treat real.or compl.x-val.ed functions,such.as g_(1)=g_(1)(x,t)and g_(2)=g_(2)(x,t)as non-commutative,and empl.y th. l.x pair associated w.th.th. evol.tion equation,as in th. commutation *** derive th. quasi-Gramian sol.tion of th. system by empl.ying a binary Darboux *** sol.ton sol.tions are presented expl.citl. w.th.n th. framew.rk of *** visual.y understand th. dynamics and sol.tions in th. given exampl.,w. al.o provide simul.tions il.ustrating th. associated ***,th. sol.tion can be used to study th. stabil.ty of pl.ne w.ves and to understand th. generation of periodic patterns w.th.n th. context of modul.tional.instabil.ty.

关键词： integrabl. systems Darboux transformation sol.tons

Th.rmal.pyrol.sis conversion of meth.ne to h.drogen(h.(2)):A review.on process parameters,reaction kinetics and tech.o-economic anal.sis

在线全文

学校读者我要写书评

暂无评论

Ch.nese Ch.mical.l.tters 2024年第8期35卷 62-73页

作者： Yi h.rng chan Zh. Ph.k chan Serene Sow.Mun l.ck Ch.ng l.ong Yiin Sh.n Ying Foong Mee Kee w.ng Muh.mmad Anw.r Ish.k Ven Ch.an Quek Sh.ngbo Ge Su Sh.ung l.m PETRONAS Research.Sdn.Bh..(PRSB) Kawasan Institusi BangiLot 3288&3289Off Jalan Ayer ItamKajang 43000Malaysia PETRONAS Carbon Capture&Storage(CCS)Enterprise PETRONAS Twin TowersKuala Lumpur City CentreKuala Lumpur 50088Malaysia CO_(2)Research.Center(CO2RES) Department of Chemical EngineeringUniversiti Teknologi PETRONASSeri Iskandar 32610Malaysia Department of Ch.mical.Engineering and Energy Sustainabil.ty Faculty of EngineeringUniversiti Malaysia Sarawak(UNIMAS)Kota Samarahan 94300Malaysia Institute of Sustainabl. and Renew.bl. Energy(ISuRE) Universiti Malaysia Sarawak(UNIMAS)Kota Samarahan 94300Malaysia h.gh.r Institution Centre of Excel.ence(h.CoE) Institute of Tropical Aquaculture and Fisheries(AKUATROP)Universiti Malaysia TerengganuKuala Nerus 21030Malaysia Co-Innovation Center of Efficient Processing and Util.zation of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China Center for Gl.bal.h.al.h.Research.CGh.) Saveetha Medical CollegeSaveetha Institute of Medical and Technical Sciences(SIMATS)Saveetha UniversityChennai 602105India

h.drogen(h.(2))is a promising renew.bl. energy w.0}ch.finds w.de appl.cations as th. w.rl. gears tow.rd l.w.carbon ***,current h.(2) production via steam meth.ne reforming of natural.gas or gasification of coal.are l.den w.th.h.gh.CO_(2) ***,meth.ne(Ch.(4))pyrol.sis h.s emerged as a potential.tech.ol.gy to generate l.w.carbon h.(2) and sol.d *** th.s review.th. current state-of-art and recent progress of h.(2) production from Ch.(4) pyrol.sis are review.d in *** such.as funda-mental.mechanism and ch.mistry invol.ed,effect of process parameters on th. conversion efficiency and reaction kinetics for various reaction media and catal.sts are el.cidated and critical.y ***-ature,among oth.r factors,pl.ys th. most critical.infl.ence on th. meth.ne pyrol.sis *** metal.sal. coul. l.w.r th. operating temperature of meth.ne pyrol.sis tow.0}reas pl.sma tech.ol.gy usual.y operates in th. regime of>1000℃.Based on th. reaction kinetics,metal.based cata-l.sts w.re more efficient in l.w.ring th. activation energy of th. reaction to 29.5-88 kJ/mol.from th.t of uncatal.zed reaction(147-420.7 kJ/mol..Besides,th. current tech.o-economic performance of th. pro-cess reveal. th.t th. l.vel.zed cost of h.(2) is directl. infl.enced by th. sal.s price of carbon(by-product)generated,w.0}ch.coul. offset th. overal. ***,th. main ch.l.enges of reactor design for efficient product separation and retrieval.as w.l. as catal.st deactivation/poisoning need to be debottl.necked.

关键词： Pyrol.sis Meth.ne h.drogen Reaction kinetics Tech.o-economic anal.sis

Rational.design of AgGaS/ZnS/ZnS quantum dots w.th.a near-unity ph.tol.minescence quantum yiel. via doubl. sh.l.ing sch.me

在线全文

学校读者我要写书评

暂无评论

Journal.of Material. Science & Tech.ol.gy 2024年第2期169卷 235-242页

作者： h.X.l. h.l.u Z.Z.Fu Y.Y.Ch.n h.Q.Dai Z.h. w.l.Zh.ng R.Q.Guo Institute for El.ctric l.gh. Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future l.gh.ing Academy for Engineering and TechnologyFudan UniversityShanghai 200433China Yiw. Research.Institute of Fudan University YiwuZhejiang 322000China Zh.ngsh.n-Fudan Joint Innovation Center Zhongshan 528437China

In th.s study,a tw.-step meth.d w.s used to synth.size h.gh.y l.minescent AgGaS/ZnS/ZnS quantum dots(QDs).In th. first step,an inner ZnS sh.l. w.s formed via a one-pot meth.d,w.0}ch.resul.ed in a smal.er l.ttice mismatch.betw.en th. AgGaS core and th. outer ZnS sh.l.,th.reby facil.tating th. formation of a th.ck outer *** th. tw.-step sh.l.ing process,th. synth.sized AgGaS/ZnS/ZnS QDs sh.w.d an excel.ent ph.tol.minescence quantum yiel.(Pl.Y)of 96.4%w.th.a peak w.vel.ngth.of 508 nm,repre-senting th. h.gh.st Pl.Y reported th.s far for AgGaS ***,th. effect of h.l.gen ions in Zn precursors on th. sh.l.ing process w.s *** w.s proposed th.t th. capacity of h.l.gen ions to coordinate w.th.th. QDs infl.enced th. bal.nce betw.en Zn cation diffusion and ZnS sh.l.ing ***,th. ZnS sh.l.ing reaction w.s dominant w.0}n ZnCl.(2)w.s empl.yed,w.0}l. Zn cation diffusion w.s th. dominant process under th. I^(−)-rich.*** w.rk provides insigh.s into th. interfacial.restructuring during th. ZnS sh.l.ing and offers a cl.ar map for th. tail.red synth.sis of core/sh.l. QDs.

关键词： AgGaS Quantum dots Ph.tol.minescence Core/sh.l. Al.oyed core/sh.l. interface

Superpl.sticity of fine-grained Mg-10l. al.oy prepared by severe pl.stic deformation and understanding its deformation mechanisms

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

Journal.of Magnesium and Al.oys 2024年第1期12卷 316-331页

作者： h.T.Jeong S.w.l.e w.J.Kim Department of Material. Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

Th. superpl.stic beh.vior and associated deformation mechanisms of a fine-grained Mg-10.1 l.-0.8Al.0.6Zn al.oy(l.Z1011)w.th.a grain size of 3.2μm,primaril. composed of th. BCCβph.se and a smal. amount of th. h.Pαph.se,w.re examined in a temperature range of 473 K to 623 *** microstructural.refinement of th.s al.oy w.s ach.eved by empl.ying h.gh.ratio differential.speed *** best superpl.sticity w.s ach.eved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),w.0}re tensil. el.ngations of 550±600%w.re *** th. h.ating and h.l.ing stage of th. tensil. sampl.s prior to tensil. l.ading,a significant increase in grain size w.s observed at temperatures above 573 ***,it w.s important to consider th.s effect w.0}n anal.zing and understanding th. superpl.stic deformation beh.vior and *** th. investigated strain rate range,th. superpl.stic fl.w.at l.w.strain rates w.s governed by l.ttice diffusion-control.ed grain boundary sl.ding,w.0}l. at h.gh.strain rates,l.ttice diffusion-control.ed disl.cation cl.mb creep w.s th. rate-control.ing deformation *** w.s concl.ded th.t sol.te drag creep is unl.kel. to *** th. l.te stages of deformation at 523 K,it w.s observed th.t grain boundary sl.ding l.d to th. aggl.meration of th.αph.se,resul.ing in significant strain *** mechanism maps w.re constructed forβ-Mg-l. al.oys in th. form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using th. constitutive equations for various deformation mechanisms derived based on th. data of th. current tests.

关键词： Magnesium-l.th.um al.oy Superpl.sticity Severe pl.stic deformation Grain size Grain grow.h

Precipitation of mul.i-type nano-quasicrystal. in a Mg-Zn-Y al.oy

在线全文

学校读者我要写书评

暂无评论

Journal.of Magnesium and Al.oys 2024年第3期12卷 997-1008页

作者： w.Z.w.ng X.Z.Zh.u l.F.Zh.ng h.Q.Ye Z.Q.Yang Sh.nyang National.l.boratory for Material. Science Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China Ji h.a l.boratory Foshan 528251China Fosh.n University Foshan 528231China

Mg-6Zn-1Y(at.%)ribbons w.th.strength.ning precipitates of mul.i-type nanoquasicrystal. w.re prepared by mel.-spinning fol.ow.d by aging *** evol.tion of th. rapidl. sol.dified ribbons during isoth.rmal.aging w.s compreh.nsivel. studied using various el.ctron microscopy *** new.kinds of decagonal.quasicrystal. w.re formed in aged ribbons,in addition to precipitation of nanometer icosah.dral.***-resol.tion observations reveal.th.t both.decagonal.quasicrystal. can be model.d by quasiperiodic til.ng w.th.decagonal.cl.sters of 2.5 nm in diameter,but overl.p of neigh.oring cl.sters in both.decagonal.quasicrystal. is different from th. Gummel. model.observed in oth.r quasicrystal..A sh.l. composed of compl.x l.ves Mg-Zn domains w.s formed surrounding each.decagonal.quasicrystal.precipitate upon prol.nged *** addition,al. kinds of nanoprecipitates exh.bit excel.ent structure and size stabil.ty at 573 *** findings may h.ve impl.cations for not onl. fundamental.studies about quasicrystal.,but al.o microstructural.manipul.tion of h.gh.performance Mg al.oys.

关键词： Quasicrystal Mg al.oys Rapid sol.dification Scanning-transmission el.ctron microscopy.

Editorial.for Mul.iscal.&Mul.ifiel. Coupl.ng in Geomechanics

在线全文

学校读者我要写书评

暂无评论

Journal.of Rock Mechanics and Geotech.ical.Engineering 2024年第6期16卷 1919-1921页

作者： Min w.ng Pengzh. Pan Andrew.h.C.chan Y.T.Feng T-3 Fl.id Dynamics and Sol.d Mechanics Theoretical DivisionLos Alamos National LaboratoryNew MexicoUSA Institute of Rock and Soil.Mechanics Chinese Academy of SciencesWuhanChina Sch.ol.of Engineering University of TasmaniaTasmaniaAustralia Col.ege of Engineering Swansea UniversityWalesUK

w. are del.gh.ed to serve as guest editors for th.s special.issue in th. Journal.of Rock Mechanics and Geotech.ical.*** purpose of th.s special.issue is dedicated to gath.ring th. l.test research.w.rk on Mul.iscal.&Mul.ifiel. Coupl.ng in Geomechanics,w.1}re w. del.e into th. intricate interpl.y of various fiel.s and scal.s th.t govern th. beh.vior of *** total.30 manuscripts from USA,Ch.na,UK,Germany,Canada,India and United Arab Emirates are sel.cted to be incl.ded in th.s issue.

关键词： material.. gath.ring mechanics

A Prel.minary Comparative Study on th. Centering Al.orith.s for CassiniISS NAC Images

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

Research.in Astronomy and Astroph.sics 2024年第10期24卷 58-65页

作者： T.l.ang Q.-F.Zh.ng G.-M.l.u w.-h.Zh. C.-S.w.ng Department of Computer Science Jinan UniversityGuangzhou 510632China Sino-French.Joint l.boratory for Astrometry Dynamics and Space ScienceJinan UniversityGuangzhou 510632China Sch.ol.of Computer Science Guangdong University of EducationGuangzhou 510303China

Obtaining h.gh.precision is an important consideration for astrometric studies using images from th. Narrow.Angl. Camera(NAC)of th. Cassini Imaging Science Subsystem(ISS).Sel.cting th. best centering al.orith. is key to enh.ncing astrometric *** th.s study,w. compared th. accuracy of five centering al.orith.s:Gaussian fitting,th. modified moments meth.d,and th.ee point-spread function(PSF)fitting meth.ds(effective PSF(ePSF),PSFEx,and extended PSF(x PSF)from th. Cassini Imaging Central.l.boratory for Operations(CICl.PS)).w. assessed th.se al.orith.s using 70 ISS NAC star fiel. images taken w.th.Cl. and Cl. fil.ers across different stel.ar *** ePSF meth.d consistentl. demonstrated th. h.gh.st accuracy,ach.eving precision bel.w.0.03 pixel. for stars of magnitude *** to th. previousl. considered best,th. modified moments meth.d,th. e PSF meth.d improved overal. accuracy by about 10%and 21%in th. sampl. and l.ne directions,***,th. xPSF model.provided by CICl.PS h.d l.w.r precision th.n th. ***,th. ePSF exh.bits an improvement in measurement precision of 23%and 17%in th. sampl. and l.ne directions,respectivel.,over th. *** discrepancy migh. be attributed to th. xPSF focusing on ph.tometry rath.r th.n *** findings h.gh.igh. th. necessity of constructing PSF model. specifical.y tail.red for astrometric purposes in NAC images and provide guidance for enh.ncing astrometric measurements using th.se ISS NAC images.

关键词： meth.ds:anal.tical tech.iques:image processing stars:imaging astrometry

Efficient guiding and focusing of intense l.ser pul.e using periodic th.n sl.ts

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： l.Xu T.w.h.ang K.Jiang C.N.w. h.Peng P.C.h.n R.l. h.B.Zh.o C.T.Zh.u Sh.nzh.n Key l.boratory of Ul.raintense l.ser and Advanced Material.Tech.ol.gy Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Sl.ts h.ve been w.del. used in l.ser-pl.sma interactions as pl.sma optical.components for generating h.gh.h.rmonic l.gh. and control.ing l.ser-driven particl. ***,w. propose and demonstrate th.t periodic th.n sl.ts can be regarded as a new.breed of optical.el.ments for efficient focusing and guiding of intense l.ser *** fundamental.ph.sics of intense l.ser interaction w.th.th.n sl.ts is studied,and it is reveal.d th.t rel.tivistic effects can l.ad to enh.nced l.ser focusing far beyond th. pure diffractive focusing *** addition,th. interaction of an intense l.ser pul.e w.th.periodic th.n sl.ts makes it feasibl. to ach.eve mul.ifol. enh.ncement in both.l.ser intensity and energy transfer efficiency compared w.th.conventional.*** resul.s provide a novel.meth.d for manipul.ting ul.ra-intense l.ser pul.es and sh.ul. be of interest for many l.ser-based appl.cations.

关键词： l.ser pul.e intense