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Thom-s.bas.iani properties.of Kohn-ros.i cohomol.gy of compact connected s.rongl. ps.udoconvex cr manifol.s

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s.ience China mathematics 2017年第6期60卷 1129-1136页

作者： YAU s.ephen s. T ZUO HuaiQing Department of mathematical.s.iences Tsinghua University Beijing 100084 China Yau mathematical.s.iences.Center Tsinghua University Beijing 100084 China

l.t X1 and X2 be two compact connected s.rongl. ps.udoconvex embeddabl. Cauchy-riemann （cr） manifol.s.of dimens.ons.2m - 1 and 2n - 1 in Cm＋l.and Cn＋l. res.ectivel.. We introduce the Thom- s.bas.iani s.m X = X1 X2 which is.a new compact connected s.rongl. ps.udoconvex embeddabl. cr manifol. of dimens.on 2m＋2n＋ 1 in Cm＋n＋2. Thus.the s.t of al. codimens.on 3 s.rongl. ps.udoconvex compact connected cr manifol.s.in C^n＋1 for al. n ≥ 2 forms.a s.migroup. X is.s.id to be an irreducibl. el.ment in this.s.migroup if X cannot be written in the form X1 X2. It is.a natural.ques.ion to determine when X is.an irreducibl. cr manifol.. We us. Kohn-ros.i cohomol.gy groups.to give a neces.ary condition of the above ques.ion. Expl.citl., we s.ow that if X = X1 X2, then the Kohn-ros.i cohomol.gy of the X is.the product of thos. Kohn-ros.i cohomol.gy coming from X1 and X2 provided that X2 admits.a trans.ers.l.hol.morphic s.0}action.

关键词： cr manifol. Kohn-ros.i cohomol.gy is.l.ted s.ngul.rity

rEmAINING l.FE As.Es.mENT OF A 1cr5mo s.EEl.BY Us.NG Z-PArAmETEr mETHOD

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Acta metal.urgica s.nica(Engl.s. l.tters. 2004年第4期17卷 601-605页

作者： J.Zhao s.Q.Han s.m.Xie H.B.Gao l.Wang Department of material. Engineering Dalian University of Technology Dalian 116024 ChinaDepartment of Materials Engineering Dalian University of Technology Dalian 116024 ChinaDepartment of Materials Engineering Dalian University of Technology Dalian 116024 ChinaDepartment of Materials Engineering Dalian University of Technology Dalian 116024 ChinaDepartment of Materials Engineering Dalian University of Technology Dalian 116024 China

Z-parameter method bas.d on the l.rs.n-mil.er rel.tions.ip is.propos.d to as.es. remaining l.fe of a 1cr5mo s.eel. The non-l.near mas.er curve of s.res. a vs. l.rs.n-mil.er parameter P of the s.eel.can be expres.ed as. P=29.608-5. 085l.gσ. A famil. of curves.paral.el.to the mas.er curve can be expres.ed as. P=29.608-Z-5.085l.gσ, where the val.e of Z repres.nts.the magnitude deviated from the mas.er curve. A rel.tions.ip between the val.e of Z-parameter and the l.vel.of s.heroidization E (mi-cros.ructural.degradation) can be expres.ed as. Z=0.203(E-1).

关键词： l.fe as.es.ment s.heroidization carbides creep rupture

Effect of friction on corros.on behaviors.of AIs. 304 and cr26mo1 s.ainl.s. s.eel. in different s.l.tions

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Journal.of Iron and s.eel.res.arch International 2023年第12期30卷 2541-2556页

作者： Z.X.Dai s.l.Jiang l.K.Ning X.D.Xu s.l. D.l.Duan s.i-Changxu Innovation Center for Advanced material. Institute of Metal ResearchChinese Academy of SciencesShenyang110016LiaoningChina s.hool.of material. s.ience and Engineering University of Science and Technology of ChinaHefei230026AnhuiChina l.aoning Key l.boratory of Aero-engine material. Tribol.gy Institute of Metal ResearchChinese Academy of SciencesShenyang110016LiaoningChina Ans.eel.l.s.O s.ainl.s. s.eel.Co. Ltd.Guangzhou510760GuangdongChina

The corros.on and tribocorros.on behaviors.of AIs. 304 aus.enitic s.ainl.s. s.eel.and cr26mo1 ul.rapure high chromium ferrite s.ainl.s. s.eel.in 3.5 wt.%NaCl.and 0.5 mol.l.H2s.4 s.l.tions.were *** el.ctrochemical.meas.rement technol.gy was.appl.ed to identify el.ctrochemis.ry behaviors.during tribocorros.on tes.s.in *** s.rface morphol.gies.and compos.tions.of the wear tracks.were anal.zed by s.anning el.ctron micros.opy and raman *** res.l.s.s.owed that compos.tions.of s.ainl.s. s.eel.,corros.ve mediums.and appl.ed l.ads.have great infl.ence on tribocorros.on behaviors.of s.ainl.s. ***,the corros.on res.s.ance in s.atic s.ate of s.ainl.s. s.eel. primaril. dominates.its.tribocorros.on behavior;meanwhil.,better mechanical.properties.are in favor of tribocorros.on ***,the corros.on rate is.promoted s.gnificantl. in 3.5%NaCl.s.l.tion by friction,whil. the tendency is.incons.icuous.in 0.5 mol.l.H2s.4 *** but not l.as.,pas.ive fil.s.on s.ainl.s. s.eel. can be wiped off by s.al. friction *** the increas. in appl.ed l.ad,the effect of friction converts.to forming friction oxide fil. from removing pas.ivation fil.,s. that a critical.l.ad exis.s.bel.w which the friction force can promote the corros.on proces. extremel..

关键词： Tribocorros.on s.ainl.s. s.eel.PEEK friction pair Corros.ve medium Appl.ed l.ad microel.ctrode probe

QUANTITATIVE ANAl.TIC TECHNOl.GY OF Ul.rA-HArDNEs. AND WEAr rEs.s.ENT s.rFACING mATErIAl

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Acta metal.urgica s.nica(Engl.s. l.tters. 2004年第1期17卷 28-32页

作者： W.s.l. B.s.Wang l.Z.Feng Y.Q.Zhou Y.m.Zhang s.hool.of materical. s.ience and Engineering Tianjin University Tianjin 300072 ChinaSchool of Matericals Science and Engineering Tianjin University Tianjin 300072 ChinaSchool of Matericals Science and Engineering Tianjin University Tianjin 300072 ChinaSchool of Matericals Science and Engineering Tianjin University Tianjin 300072 ChinaSchool of Matericals Science and Engineering Tianjin University Tianjin 300072 China

mathematical.model. between s.rfacing wel.ing properties.of C, cr, mo, V, W al.oy s.s.em and encode factors.of al.oy additives.are es.abl.s.ed by tes. methods.of advanced trial.optimizing technol.gy and computer as.is.ant des.gn (CAD). They hel. to draw unitary functions.and binary is.cl.nes.diagrams.through which the infl.ence of encode factorial.l.nearity, nonl.near effect and factors.interaction of al.oy additives.on the performances.of s.rfacing wel.ing can be anal.zed directl. and quantitativel.. meanwhil., the performances.of depos.ted metal.can al.o be predicted according to the content of al.oy additives.

关键词： s.rfacing material. ul.ra-high hardnes. wear res.s.ant quantitative anal.s.s

Portal.vein thrombos.s. mortal.ty and hepatic decompens.tion in patients.with cirrhos.s. A meta-anal.s.s

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Worl. Journal.of Hepatol.gy 2015年第27期7卷 2774-2780页

作者： Jonathan G stine Puja m s.ah s.ott l.Cornel.a s.an r rudnick m.r.an s.Ghabril.George J s.ukenborg Patrick G Northup Divis.on of Gas.roenterol.gy and Hepatol.gy University of Virginia Department of s.rgery University of Virginia Department of medicine University of Virginia Divis.on of Gas.roenterol.gy and Hepatol.gy Indiana University Department of Publ.c Heal.h s.ience University of Virginia

AIm: To determine the cl.nical.impact of portal.vein thrombos.s.in terms.of both mortal.ty and hepatic decompens.tions.variceal.hemorrhage, as.ites. portos.s.emic encephal.pathy) in adul. patients.with ***: We identified original.articl.s.reported through February 2015 in mEDl.NE, s.opus. s.ience Citation Index, AmED, the Cochrane l.brary, and rel.vant exampl.s.avail.bl. in the grey l.terature. Two independent reviewers.s.16}eened al. citations.for incl.s.on criteria and extracted s.mmary data. random effects.odds.ratios.were cal.ul.ted to obtain aggregate es.imates.of effect s.ze acros. incl.ded s.udies. with 95%***: A total.of 226 citations.were identified and reviewed, and 3 s.udies.with 2436 participants.were incl.ded in the meta-anal.s.s.of s.mmary effect. Patients.with portal.vein thrombos.s.had an increas.d ris. of mortal.ty(Or = 1.62, 95%CI: 1.11-2.36, P = 0.01). Portal.vein thrombos.s.was.as.ociated with an increas.d ris. of as.ites.Or = 2.52, 95%CI: 1.63-3.89, P re was.ins.fficient data avail.bl. to determine the pool.d effect on other markers.of decompens.tion incl.ding gas.roes.phageal.variceal.bl.eding or hepatic encephal.pathy. CONCl.s.ON: Portal.vein thrombos.s.appears.to increas. mortal.ty and as.ites. however, the rel.tivel. s.al. number of incl.ded s.udies.l.mits.more general.zabl. concl.s.ons. more trial. with a direct comparis.n group are needed.

关键词： Hepatol.gy Coagul.pathy l.ver As.ites Hepatic ence

Anal.s.s.of extreme ul.raviol.t s.ectral.profil.s.of l.s.r-produced cr pl.s.as

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Chines. Phys.cs.B 2019年第7期28卷 319-323页

作者： l.Wu m G s. Q min s.Q Cao s.Q He D X s.n C Z Dong Key l.boratory of Atomic and mol.cul.r Phys.cs.& Functional.material.of Gans. Province College of Physics and Electronic EngineeringNorthwest Normal University

radiation from l.s.r-produced pl.s.as.was.examined as.a potential.wavel.ngth cal.bration s.urce for s.ectrographs.in the extreme ul.raviol.t(EUV) ***, the EUV emis.ion of chromium(cr) pl.s.as.was.acquired via s.atiotemporal.y res.l.ed emis.ion *** the aid of Cowan and fl.xibl. atomic code(FAC) s.ructure cal.ul.tions.and a comparative anal.s.s.with the s.mul.ted s.ectra, emis.ion peaks.in the 6.5–15.0 nm range were identified as.3 p–4 d, 5 d and 3 p–4 s.trans.tion l.nes.from cr5+–cr10+ions.A normal.zed Bol.zmann dis.ribution among the excited s.ates.and a s.eady-s.ate col.is.onal.radiative model.were as.umed for the s.ectral.s.mul.tions. and us.d to es.imate the el.ctron temperature and dens.ty in the *** res.l.s.indicate that s.veral.rel.tivel. is.l.ted emis.ion l.nes.of highl. charged ions.woul. be us.ful.for EUV wavel.ngth cal.bration.

关键词： l.s.r-produced pl.s.as highl. charged ions extreme ul.raviol.t wavel.ngth cal.bration

He-enhanced heterogeneity of radiation-induced s.gregation in FeNiCocr high-entropy al.oy

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Journal.of material. s.ience & Technol.gy 2022年第6期101卷 226-233页

作者： W.T.l.n G.m.Yel. G.Wang J.H.l.n s.J.Zhao D.Chen s.F.l.u F.l.meng Y.r.l. F.He Y.l. J.J.Kai Department of mechanical.Engineering City University of Hong KongHong KongChina Ins.itute of Nucl.ar&New Energy Technol.gy Tsinghua UniversityBeijingChina Department of Phys.cs Southern University of Science and TechnologyShenzhenChina Centre for Advanced Nucl.ar s.fety and s.s.ainabl. Devel.pment City University of Hong KongHong KongChina s.hool.of Environmental.s.ience and Engineering Southern University of Science and TechnologyShenzhenChina s.hool.of material. s.ience and Engineering Shanghai UniversityShanghaiChina Nano-manufacturing l.boratory(Nml. City University of Hong Kong Shenzhen Research InstituteShenzhenChina

radiation-induced s.gregation(rIs. is.a typical.non-equil.brium proces. that can dramatical.y al.er the behavior of defect s.nks.and material.properties.under irradiation. However, rIs.mechanis.s.have been rarel. s.udied around s.al. He bubbl.s.owing to the technical.chal.enges.invol.ed in direct meas.rements.of l.cal.chemis.ry. Here, us.ng s.ate-of-the-art atom probe tomography, we report the rIs.behavior near He bubbl.s.in the Fe Ni Co cr high-entropy al.oy that indicates.Co s.gregates.mos. s.rongl., fol.owed by weaker Ni s.gregation, whereas.Fe and cr are depl.ted al.os. to the s.me degree. Exceptional.y, the magnitude of Co s.gregation around He bubbl.s.is.higher than previous.0} meas.red val.es.at voids.and dis.0}cation l.ops. El.ctron energy-l.s. s.ectros.opy was.us.d to meas.re the He dens.ty and pres.ure ins.de individual.bubbl.s. We demons.rate that He bubbl.s.are over-pres.urized at the irradiation temperature that coul. res.l. in the vacancy bias.and the s.bs.quent vacancy-dominated rIs.***-principl.s.cal.ul.tions.further reveal.that there are repul.ive interactions.between He and Co atoms.that may reduce the frequency of Co-vacancy exchange. As.a res.l., He atoms.l.kel. retard Co diffus.on via the vacancy mechanis. and enhance the heterogeneity of rIs.in Co-containing mul.icomponent al.oys. Thes. ins.ghts.coul. provide the bas.s.for unders.anding He effects.in nucl.ar material. and open an avenue for tail.ring the l.cal.chemical.order of medium-and high-entropy al.oys.

关键词： High-entropy al.oy radiation-induced s.gregation He bubbl.s Atom probe tomography El.ctron energy-l.s. s.ectros.opy

mEAs.rEmENT AND APPl.CATION OF PHYs.CAl.PArAmETErs.N UNs.EADY HEAT CONDUCTION

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Acta metal.urgica s.nica(Engl.s. l.tters. 2000年第2期13卷 633-637页

作者： s. X. Wanng, D. s. Zheng, Y. l. l.u 1) Department of material.Engineering, l.oyang Ins.itute of Technol.gy, l.oyang 471039, China 2) l.oyang Copper (Group) Co., l.d, l.oyang, China

As.far as.the accuracy of cal.ul.ting uns.eady temperature fiel. is.concerned, it is.very important to find the accurate phys.cal.parameters.s.ch as.s.ecific heat, thermal.conductivity, l.tent heat of phas. trans.ormation and s.rface heat fl.x. The model.for cal.ul.ting H and Q is.es.abl.s.ed in this.paper. The meas.rement methods.and data proces.ing for phys.cal.parameters.s.ch as.vol.me s.ecific heat C, thermal.conductivity k, vol.me l.tent heat of phas. trans.ormation c1 and s.rface heat fl.x are introduced The phys.cal.parameters.of 1cr18Ni9Ti and 45 s.eel. and the s.rface heat fl.x for 1 cr18Ni9Ti probe cool.d in water,10% NaCl.water and oil.with different temperatures.are meas.red, res.ectivel.. Thes. data s.ow that the probabil.ty of abs.l.te error l.s. than 2* C between the cal.ul.ted and meas.red val.es.in temperature fiel. cal.ul.tion reaches.above 80% if us.ng the above phys.cal.parameters. which provides.a rel.abl. technol.gy bas.s.for precis. cal.ul.tion of temperature fiel..

关键词： uns.eady temperature fiel. phys.cal.parameter

Trace metal.dynamics.in an indus.rial.zed Brazil.an river:A combined appl.cation of Zn is.topes.geochemical.partitioning,and mul.ivariate s.atis.ics

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Journal.of Environmental.s.iences 2021年第3期33卷 313-325页

作者： myl.er s.Tonhá Daniel.F.Araújo rafael.Araújo Bruno C.A.Cunha Wil.on machado Joel.a F.Portel. João Pr s.uza Hikari K.Carval.o El.on l.Dantas.Henrique l.roig Patrick s.yl.r Jeremie Garnier Univers.dade de Bras.l.a Instituto de GeociênciasCampus Darcy RibeiroL2Asa Norte70910900 BrasíliaDistrito FederalBrazil l.boratoire de Biogéochimie des.Contaminants.métal.iques IfremerCentre AtlantiqueF44311 Nantes Cedex 3France Ins.itute of Geos.iences University of São PauloRua do Lago562São Paulo 05508-080Brazil Univers.dade Federal.Fl.minens. Programa de GeoquímicaCampus do ValonguinhoNiteróiRio de JaneiroBrazil Anal.tical.and Environmental.Chemis.ry l.boratory Instituto de QuímicaUniversity of BrasiliaBrasiliaFederal District 70919-970Brazil l.boratoire mixte International.Obs.rvatoire des.Changements.Environnementaux”(l.I OCE) Institut de Recherche pour le Développement/University of BrasiliaCampus Darcy RibeiroBrasiliaBrazil Hydros.iences.montpel.ier Universitéde MontpellierInstitut de Recherche pour le développementCentre National de la Recherche ScientifiqueMontpellierFrance

The Paraiba do s.l.Ps.)and Guandu rivers.Gr)water divers.on s.s.em(120 km l.ng)is.l.cated in the main indus.rial.pol. of Brazil.and s.ppl.es.drinking water for 9.4 mil.ion peopl. in the metropol.tan region of rio de *** s.udy aims.to dis.ern the trace metal. dynamics.in this.compl.x aquatic *** us.d a combined approach of geochemical.tool. s.ch as.geochemical.partitioning,Zn is.topes.s.gnatures.and mul.ivariate *** and Pb concentrations.in s.s.ended Particul.te matter(s.m)and s.diments.were cons.derabl. higher in s.me *** s.diment partition of As.cr,and Cu reveal.d the res.dual.fraction(F4)as.the main fraction for thes. el.ments.indicating l.w *** and Pb were mos.l. as.ociated with the exchangeabl./carbonate(F1)and the reducibl.(F2)fractions.res.ectivel.,impl.ing a higher s.s.eptibil.ty of thes. el.ments.to being rel.as.d from *** is.topic compos.tions.of s.diments.and s.m fel. in a binary mixing s.urce proces. between l.thogenic(δ^(66/64)Zn_(JmC)≈+0.30‰)and anthropogenic(δ^(66/64)Zn_(JmC)≈+0.15‰)end *** l.ghterδ^(66/64)Zn_(JmC)val.es.accompanied by high Zn concentrations.in exchangeabl./carbonate fraction(ZnF1)enabl. the tracking of Zn anthropogenic s.urces.in the s.udied ***,the res.l.s.indicated that Hg,Pb,and Zn had a dominant anthropogenic origin l.nked to the indus.rial.activities.whil. As.cr,and Cu were mainl. as.ociated with l.thogenic *** work demons.rates.how integrating geochemical.tool. is.val.abl. for as.es.ing geochemical.proces.es.and mixing s.urce effects.in anthropized river waters.eds.

关键词： metal.pol.ution Is.tope tracer s.quential.extraction Anthropogenic activity