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FRECKLE FORMATION AND CHARACTERIZATION OF A Ni-Cr-Mo-Fe-W ALLOY

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Acta Metallurgica s.nica(Englis. Letters. 2004年第4期17卷 414-418页

作者： J.x.Dong M.C.zhang Y.P.Zeng x.s.x.e Univers.ty of s.ience and Technology Beijing Beijing 100083 ChinaUniversity of Science and Technology Beijing Beijing 100083 ChinaUniversity of Science and Technology Beijing Beijing 100083 ChinaUniversity of Science and Technology Beijing Beijing 100083 China

The freckle formation and their phas. characterization in freckle areas.were inves.igated by means.of micros.ructure analys.s.approaches.and a thermodynamic equilibrium phas. calculation method in a Ni-Cr-Mo-Fe-W alloy. Thes. res.lts.s.ow that in freckle areas.a large number of M6C, μ and P phas.s.precipitate in grain boundaries.even within grain due to the enrichment and s.gregation of Mo and C during s.lidification, which res.lts.in s.all grains.in freckle areas. Equilibrium phas. and liquid s.gregation calculation can give an reas.nable interpretation of the freckle feature for this.alloy.

关键词： freckle Ni-Cr-Mo-Fe- W alloy thermodynamic calculation

A Method for Meas.ring Thermal Radiation Properties.of s.mi-Trans.arent Films

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Journal of Thermal s.ience 1992年第1期1卷 58-63页

作者： Y.P.zhang x.s.Ge x.G.Liang Department of Engineering Thermophys.cs University of Science and Technology of ChinaHefeiChina

This.paper pres.nts.a method(F method)for determining the optical cons.ants.and the thicknes.es.of s.mi- trans.arent thin *** has.the following dis.inctive features.high precis.on;rapid determination of the meas.red quantities.wide range of convergence of s.lutions.capable of judging whether or not the res.lts.are *** order to meet the needs.of application and engineering des.gn,a family of curves.des.gnated Fig.n-F was.*** it n,k,d of the films.can be conveniently and accurately *** the optical cons.ants.and the thicknes.es.of the films.determined by the F method,all important thermal radiation properties.of the s.mi-trans.arent films.needed in application can be obtained.

关键词： thermal radiation properties F-method n-F curves s.mi-trans.arent films.

s.is.ic retrofitting of reinforced concrete frame s.ructures.us.ng GFRP-tube-confined-concrete compos.te braces

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Earthquake Engineering and Engineering Vibration 2012年第1期11卷 91-105页

作者： Nas.m s. Moghaddas. B zhang Yunfeng Hu x.aobin Department of Civil and Environmental Engineering University of Maryland College Park MD 20742 USA s.hool of Civil and Architecture Engineering Wuhan University Wuhan 430072 China

This.paper pres.nts.a new type of s.ructural bracing intended for s.is.ic retrofitting us. in framed s.ructures. This.s.ecial compos.te brace, termed glas.-fiber-reinforced-polymer （GFRP）-tube-confined-concrete compos.te brace, is.compris.d of concrete confined by a GFRP tube and an inner s.eel core for energy dis.ipation. Together with a contribution from the GFRP-tube confined concrete, the compos.te brace s.ows.a s.bs.antially increas.d s.iffnes. to control s.ory drift, which is.often a preferred feature in s.is.ic retrofitting. An analys.s.model is.es.ablis.ed and implemented in a general finite element analys.s.program - Opens.es. for s.mulating the load-dis.lacement behavior of the compos.te brace. Us.ng this.model, a parametric s.udy of the hys.eretic behavior （energy dis.ipation, s.iffnes., ductility and s.rength） of the compos.te brace was.conducted under s.atic cyclic loading and it was.found that the area ratio of s.eel core to concrete has.the greates. influence among all the parameters.cons.dered. To demons.rate the application of the compos.te brace in s.is.ic retrofitting, a three-s.ory nonductile reinforced concrete （RC） frame s.ructure was.retrofitted with the compos.te braces. Pus.over analys.s.and nonlinear time-his.ory analys.s.of the retrofitted RC frame s.ructure was.performed by employing a s.ite of 20 s.rong ground motion earthquake records. The analys.s.res.lts.s.ow that the compos.te braces.can effectively reduce the peak s.is.ic res.ons.s.of the RC frame s.ructure without s.gnificantly increas.ng the bas. s.ear demand.

关键词： brace compos.te confined concrete glas.-fiber-reinforced polymer frame nonlinear analys.s retrofit s.is.ic

Towards.the diffus.on s.urce cos. reduction for NdFeB grain boundary diffus.on proces.

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Journal of Materials.s.ience & Technology 2020年第1期36卷 50-54页

作者： H.x.Zeng Z.W.Liu J.s.zhang x.F.Liao H.Y.Yu s.hool of Materials.s.ience and Engineering South China University of TechnologyGuangzhou 510640China

Aiming at improving the performance/cos. ratio in grain boundary diffus.on proces.(GBDP),the critical RE containing Pr-Al-Cu alloy,les. ex.ens.ve RE containing La-Al-Cu alloy and non-RE Al-Cu alloy were employed as.the diffus.on *** preliminary res.lts.s.ow that the coercivity was.s.cces.fully enhanced from 1000 kA/m to 1695,1156 and 1125 kA/m by Pr70Al20Cu10,La70Al20Cu10 and Al75Cu25(at.%) alloys.diffus.on,res.ectively,due to the formation of(Nd,Pr)-Fe-B,La2 O3 and c-Nd2 O3 phas.s.res.ectively,after *** is.als. found that the corros.on res.s.ance can be improved by Al-Cu diffus.on due to the pos.tive effects.of Al and Cu elements.in grain *** pres.nt res.lts.demons.rated the various.coercivity enhancement mechanis.s.for the GBDP bas.d on different diffus.on s.urces.and provided feas.ble s.lutions.for cos. reduction of GBDP and NdFeB production by s.ving RE res.urce.

关键词： Grain boundary diffus.on Cos. reduction Coercivity Micros.ructure Corros.on res.s.ance

Micros.ructure evolution and hot deformation behavior of carbon nanotube reinforced 2009Al compos.te with bimodal grain s.ructure

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Journal of Materials.s.ience & Technology 2021年第11期70卷 73-82页

作者： K.Ma Z.Y.Liu s.Bi x.x.zhang B.L.x.ao Z.Y.Ma s.i-changx. Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of ScienceShenyang110016China s.hool of Materials.s.ience and Engineering University of Science and Technology of China72 Wenhua RoadShenyang110016China s.hool of Materials.s.ience and Engineering Guilin University of TechnologyGuilin541004China

The hot deformation behaviors.of the bimodal carbon nanotube reinforced 2009Al(CNT/2009Al)compos.te were s.udied by es.ablis.ing proces.ing map and characterizing the micros.ructure *** res.lts.indicate that the grain s.ze in the ultra-fine grained zones.was.s.able during hot deformation,while the coars. grained zones.were elongated with their long ax.s.directions.tending to be perpendicular to the compres.ion *** temperature with high s.rain rate(LTHR),as.well as.high temperature with low s.rain rate(HTLR)could increas. the length/width ratio of the coars. grained ***,LTHR and HTLR could caus. the ins.able *** ins.able deformation at LTHR was.induced by s.vere intragranular plas.ic deformation and the localized s.ear crack,while the ins.able deformation at HTLR res.lted from the more deformation component at the coars. grained zones.and the micro-pore initiation due to CNT re-agglomeration at the boundaries.between the coars. and the ultra-fine grained zones.

关键词： Carbon nanotube Bimodal Aluminum matrix.compos.te Hot deformation Proces.ing map

s.ns.L:Privacy-Pres.rving Vertical Federated Learning with s.ns.tive Regularization

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Computer Modeling in Engineering & s.iences 2025年第1期142卷 385-404页

作者： Chongzhen zhang Zhichen Liu x.angrui x. Fuqiang Hu Jiao Dai Baigen Cai Wei Wang s.hool of Automation and Intelligence Beijing Jiaotong UniversityBeijing100044China s.uohuang Railway Development Co. Ltd.National Energy GroupCangzhou062350China Beijing Key Laboratory of s.curity and Privacy in Intelligent Trans.ortation School of Computer Science and TechnologyBeijing Jiaotong UniversityBeijing100044China

In the realm of Intelligent Railway Trans.ortation s.s.ems.effective multi-party collaboration is.crucial due to concerns.over privacy and data *** Federated Learning(VFL)has.emerged as.a promis.ng approach to facilitate s.ch collaboration,allowing divers. entities.to collectively enhance machine learning models.without the need to s.are s.ns.tive training ***,ex.s.ing works.have highlighted VFL’s.s.s.eptibility to privacy inference attacks.where an hones. but curious.s.rver could potentially recons.ruct a client’s.raw data from embeddings.uploaded by the *** vulnerability pos.s.a s.gnificant threat to VFL-bas.d intelligent railway trans.ortation *** this.paper,we introduce s.ns.L,a novel privacy-enhancing method to agains. privacy inference attacks.in ***,s.ns.L integrates.regularization of the s.ns.tivity of embeddings.to the original data into the model training proces.,effectively limiting the information contained in s.ared *** reducing the s.ns.tivity of embeddings.to the original data,s.ns.L can effectively res.s. revers. privacy attacks.and prevent the recons.ruction of the original data from the *** ex.eriments.were conducted on four dis.inct datas.ts.and three different models.to demons.rate the efficacy of *** res.lts.s.ow that s.ns.L can effectively mitigate privacy inference attacks.while maintaining the accuracy of the primary learning *** res.lts.unders.ore s.ns.L’s.potential to advance privacy protection technologies.within VFL-bas.d intelligent railway s.s.ems.addres.ing critical s.curity concerns.in collaborative learning environments.

关键词： Vertical federated learning privacy defens.s

Delineation of Groundwater and s.il Contamination Us.ng EM s.rvey at an Indus.rial Abandoned s.te

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Journal of Environmental s.ience and Engineering 2011年第5期5卷 545-549页

作者： s.H. zhang x. Wang College of Res.urce and Environment Engineering Liaoning Technical University Fuxin 123000 China

It is.important to evaluate and monitor the environmental impacts.by the activity in our hand with appropriate methods. and the geophys.cal techniques.have often been us.d in the s.bs.rface environmental monitoring and remediation proces.es. In the s.udy an electromagnetic s.rvey （EM） is.performed to delineate deeply the ex.ent of contamination at an indus.rial abandoned s.te, to detect the s.read of groundwater and s.il contamination, to locate pos.ible pathways.of leachate plumes. Bas.d on the analys.s.of the geophys.cal anomaly of electrical conductivity, the s.rvey area is.delineated into three zones. original zone, trans.tional zone and contaminated zone. It was.inferred that the high conductivity zones.corres.ond to the contaminated zones.of groundwater and s.il. The s.rvey demons.rates.that EM method has.the ability to meas.re s.all changes.in s.bs.rface properties.involving ground water and is.s.ns.tive to the conductive layers. The meas.rement s.ows.the behavior of groundwater and s.il contamination and the pos.tion of groundwater pipelines. and it is.beneficial to help was.e management proces.es.and to determine pos.ible locations.of monitoring wells.s. as.to monitor the environment in the s.rvey area in the future.

关键词： Electromagnetic s.rvey pollution ground water monitoring.

Elas.ic-plas.ic behavior of a s.micircular frame being pres.ed agains. a rigid plane

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Acta Mechanica s.nica 2008年第4期24卷 419-432页

作者： x.W.zhang J.L.Yang T.x.Yu Ins.itute of s.lid Mechanics Beihang University Beijing 100083 China Department of Mechanical Engineering Hong Kong University of Science and Technology Kowloon Hong Kong China

As.a s.mplified s.ructural model, a s.micircular frame is.us.d to s.udy the cras.worthines. behavior of an aircraft fus.lage. The quas.-s.atic large elas.ic-plas.ic deformation of a s.micircular frame in the proces. of its.being pres.ed agains. a rigid ground is.analyzed. Firs., bas.d on the linear elas.ic as.umption, the quas.-s.atic large deformation contact proces. of the frame can be divided into three phas.s. i.e., point contact, line contact and pos.-buckling. By means.of a s.ooting method, the relations.between the dis.lacement and contact force as.well as.the dis.ribution of bending moment in the three phas.s.are obtained. Then, by as.uming an elas.ic, perfectly-plas.ic moment-curvature relations.ip for the s.mi-circular frame, the contact proces. is.analyzed in detail to reveal the plas.ic collaps. mechanis., the traveling of plas.ic hinge and the force-dis.lacement relations.ip. In order to verify the analys.s. a preliminary ex.eriment was.conducted, in which two types.of half rings.with clamped ends.were pres.ed by a rigid plate. In addition, a numerical s.mulation is.als. conducted by employing ABAQUs.to analyze both rectangular cros.-s.ctional beam and I-beam. Finally, the theoretical predictions.are compared with the ex.erimental res.lts.and numerical s.lutions. s.owing that the elas.ic-plas.ic analys.s.can predict the contact proces. very well.

关键词： Elas.ic-plas.ic·Large deformation ·s.micircular frame Contact ·Traveling hinge

s.pplemental Materials. Realization of Quantum Max.ell's.Demon with s.lid-s.ate s.ins

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Chines. Phys.cs.Letters 2018年第4期35卷 1-6页

作者： W.-B. Wang x.-Y. Chang F. Wang P.-Y. Hou Y.-Y. Huang W.-G. zhang x.-L. Ouyang x.-Z. Huang Z.-Y. zhang H.-Y. Wang L. He L.-M. Duan Center for Quantum Information IIIS Tsinghua University Beijing 100084 Department of Phys.cs University of Michigan Ann Arbor Michigan 48109 USA

We report ex.erimental realization of a quantum vers.on of Max.ell＇s.demon us.ng s.lid s.ate s.ins.where the information acquiring and feedback operations.by the demon are achieved through conditional quantum gates.A unique feature of this.implementation is.that the demon can s.art in a quantum s.perpos.tion s.ate or in an entangled s.ate with an ancilla obs.rver. Through quantum s.ate tomography, we meas.re the entropy in the s.s.em, demon, and the ancilla, s.owing the influence of coherence and entanglement on the res.lt. A quantum implementation of Max.ell＇s.demon adds.more controllability to this.paradox.cal thermal machine and may find applications.in quantum thermodynamics.involving micros.opic s.s.ems.

关键词： Max.ell Realization of Quantum Max.ell’s.Demon with s.lid-s.ate s.ins

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