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High Strain Rate Superplastic.ty in a Mic.o-grained Al-Mg-Sc.Alloy with Predominant High Angle Grain Boundaries

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Journal of.Materials Sc.enc. & Tec.nology 2012年第11期28卷 1025-1030页

作者： f. c. Liu Z.Y. Ma f. c. Zhang Shenyang National Laboratory f.r Materials Sc.enc. Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China State Key Laboratory of.Metastable Materials Sc.enc. and Tec.nology Yanshan University Qinhuangdao 066004China

f.ic.ion stir proc.ssing （f.P） was applied to extruded AI-Mg-Sc.alloy to produc. f.ne-grained mic.ostruc.ure with a grain size of.2.2μm. Elec.ron bac.sc.tter dif.rac.ion （EBSD） result showed that the grain boundary misorientation distribution was very c.ose to a random grain assembly f.r randomly oriented c.bes. Super- plastic.investigations in the temperature range of.425-500 ℃ and strain rate range of.1x100^-2-1x10 s^-1 showed that a maximum elongation of.1500% was ac.ieved at 475 ℃ and a high strain rate of.1x100^-2-1x10 s^-1. The f.P AI-Mg-Sc.exhibited enhanc.d superplastic.def.rmation kinetic. c.mpared to that predic.ed by the c.nstitutive relationship f.r superplastic.ty in f.ne-grained aluminum alloys. The origin f.r enhanc.d superplas- tic.def.rmation kinetic. in the f.P alloy c.n be attributed to its high f.ac.ion of.high angle grain boundaries （HAGBs）. The analyses of.the superplastic.data and sc.nning elec.ron mic.osc.py （SEM） examinations on the surf.c.s of.def.rmed spec.mens indic.ted that grain boundary sliding is the main superplastic.def.rmation mec.anism f.r the f.P AI-Mg-Sc.alloy.

关键词： Superplastic.ty f.ic.ion stir proc.ssing Aluminum Mic.ostruc.ure f.ic.ion stir welding

The Quotient c.tegory of.a Graded Morita-Takeuc.i c.ntext

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Ac.a Mathematic. Sinic.,English Series 2006年第1期22卷 123-130页

作者： f. c.STANO IGLESIAS c. NASTASESc. Departamento de Estadistic. y Matemdtic. Aplic.da Universidad de Almeria 04120 Almeria Spain f.c.ltatea de Matematic. Str. Academiei 14 RO-70109 Bucharest Romania

In this paper, we of.er a graded equivalenc. between the quotient c.tegories def.ned by any graded Morita-Takeuc.i c.ntext via c.rtain modif.c.tions of.the graded c.tensor f.nc.ors. As a c.nsequenc., we show a c.mmutative diagram that establish the relation between the c.osed objec.s of.the c.tegories gr^c.and M^c. where c.is a graded c.algebra.

关键词： Graded c.algebra Graded Morita c.ntext Quotient c.tegory

Laser Induc.d f.uoresc.nc. Spec.rosc.py of.IrN

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c.inese Journal of.c.emic.l Physic. 2009年第2期22卷 157-161页

作者： H. f. Pang A. S. c. c.eung Department of.c.emistry The University of Hong Kong Pokfulam Road Hone Kong China

High resolution laser induc.d f.uoresc.nc., spec.ra of.IrN in the spec.ral region between 394 and 520 nm were rec.rded using laser vaporization/reac.ion f.ee jet expansion and laser induc.d f.uoresc.nc. spec.rosc.py. Seven new vibronic.transition bands were observed and analyzed. Two Ω=1 and f.ve Ω=0 new states were identif.ed. Least squares f.t of.rotationally resolved transition lines yielded ac.urate molec.lar c.nstants f.r the upper states. Spec.ra of.isotopic.molec.les were observed, whic. provided c.nf.rmation f.r the vibrational assignment. c.mparison of.the observed elec.ronic.states of.IrB, Irc. and IrN provides a good understanding of.the c.emic.l bonding of.this group of.molec.les.

关键词： Elec.ronic.transition Rotational analysis Iridium mononitride Laser induc.d f.uoresc.nc. spec.rosc.py

New photo-thermal-synthesized polymer f.r self.c.mpac.ing c.nc.ete to inc.ease produc.ivity, minimize pollution, and eliminate steam c.ring in prec.st c.nc.ete

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Journal of.Harbin Institute of.Tec.nology(New Series) 2006年第5期13卷 518-524页

作者： f. c. Lai M. f. Mohd Zain 王宝民 K. c. Lee Dept. of.c.vil and Struc.ural Engineering Faculty of Engineering Universiti Kebangsaan Malaysia 43600 U.K.M Bangi Selangor Darul Ehsan Malaysia Dept. of.c.vil Engineering Dalian University of Technology Dalian 116024 China Sime Darby Tec.nology Petaling Jaya Kuala Lumpur Malaysia

The objec.ive in this study is to apply the sustainable c.emistry and photo-thermal synthesis tec.nology to produc. the sustainable ec.-superplastic.ser f.r the sustainable high perf.rmanc. Sc. c.nc.ete espec.ally in hot tropic.l c.untries. A photo-thermal synthesized ec.-superplastic.ser （PSES） was produc.d by using photo-thermal c.talyst in a solar c.emic.l reac.or. In this preliminary study, an unique high early strength of.Sc. c.nc.ete has been suc.essf.lly produc.d by imposing an unique proportion of.the photo-thermal-synthesized ec.- Superplastic.ser （PSES）, loc.l f.y ash, sand and aggregate. The Sc. c.nc.ete is preliminary tried in the prec.st c.nc.ete produc. to produc. the c.mplic.ted geometries as Tunnel segment, U-shape beam, and Box girder whic. have the c.itic.l reinf.rc.ment and thin sec.ion c.nc.ete. Surprisingly, this Sc. provide the benef.ts as eliminating steaming energy, inc.eased produc.ivity, and minimize pollution. These unique properties of.sustainable Sc. c.nc.ete c.n not be ac.ieved by the c.nvention c.nc.ete by using ligno, naphthalene and melamine base superplasf.c.ser. The synthesized sustainable ec.-superplastic.ser is a perf.c. c.oic. to f.lly utilized the renewable energy and improve the c.nc.ete working environment.

关键词： photo-c.emic.l synthesis sustainable self.c.mpac.ing c.nc.ete ec.-superplastic.ser eliminate steaming renewable solar energy

Analytic.l solutions of.unif.rm extended disloc.tions and trac.ions over a c.rc.lar area in anisotropic.magnetoelec.roelastic.bimaterials

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Ac.a Mec.anic. Sinic. 2013年第1期29卷 73-84页

作者： Y.-f. Zhao X.-c. Shang E. Pan Dept. of.c.vil Engineering University of Akron Dept. of.Applied Mec.anic. University of Science and Technology

In this paper, we derive the analytic.l solutions in a three-dimensional anisotropic.magnetoelec.roelastic.bimaterial spac. subjec. to unif.rm extended disloc.tions and trac.ions within a horizontal c.rc.lar area. By virtue of.the Stroh f.rmalism and f.urier transf.rmation, the f.nal expression of.solutions in the physic.l domain c.ntains only line integrals over [0, 2π] rather than inf.nite integrals. As the reduc.d c.ses, the half.spac. and homogeneous f.ll-spac. solutions c.n be direc.ly derived f.om the present solutions. Also, in terms of.material domains, the present solutions c.n be reduc.d to the piezoelec.ric. piezomagnetic. purely elastic.materials with dif.erent symmetries of.material prop- erty. To c.rry out numeric.l c.lc.lations, Gauss quadrature is adopted. In the numeric.l examples, the ef.ec. of.dif.erent loading loc.tions on the response at the interf.c. is analyzed. It is shown that, when the magnetic.trac.ion or elec.ric.disloc.tion is applied, the physic.l quantities on the interf.c. may not dec.ease monotonic.lly as the loading area moves away f.om the interf.c.. The distributions of.dif.erent in-plane physic.l quantities on the upper and lower interf.c.s under various extended horizontal loadings are c.mpared and the dif.erenc.s are disc.ssed. The work presented in this paper c.n serve as benc.marks f.r f.ture numeric.l studies in related researc. f.elds.

关键词： Anisotropic.bimaterial spac.. Magnetoelec.roe- lastic Extended disloc.tions Extended trac.ions c.rc.lar loading Analytic.solutions

On the Simulation of.Industrial Gas Dynamic.Applic.tions with the Disc.nti- nuous Galerkin Spec.ral Element Method

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Journal of.Thermal Sc.enc. 2016年第3期25卷 250-257页

作者： f. Hempert M. Hof.mann U. Iben c.-D. Munz Robert-Bosc. GmbH Robert-Bosc. c.mpus 1 71272 Renningen Germany Institute of.Aerodynamic. and Gas Dynamic. Pfaffenwaldring 21 70569 Stuttgart Germany

In the present investigation, we demonstrate the c.pabilities of.the disc.ntinuous Galerkin spec.ral element method f.r high order ac.urac. c.mputation of.gas dynamic.. The internal f.ow f.eld of.a natural gas injec.or f.r bivalent c.mbustion engines is investigated under its operating c.nditions. The simulations of.the f.ow f.eld and the aeroac.ustic.noise emissions were in a good agreement with the c.perirnental data. We tested several shoc.c.pturing tec.niques f.r the disc.ntinuous Galerkin sc.eme. Based on the validated f.amework, we analyzed the development of.the supersonic.jets during dif.erent opening proc.dures of.a c.mpressed natural gas injec.or. The results suggest that a more gradual injec.or opening dec.eases the noise emission.

关键词： Disc.ntinuous Galerkin natural gas injec.ion supersonic.under-expanded jet high perf.rmanc. c.mputing

Experimental study of.f.ic.ion dissipators f.r seismic.protec.ion of.building struc.ures

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Earthquake Engineering and Engineering Vibration 2011年第4期10卷 475-486页

作者： f. López-Almansa S.T. de la c.uz c. Taylor Tec.nic.l University of.c.talonia Architecture Structures Department Universidad Autónoma de c.udad Juárez Civil and Environmental Engineering Department c.vil Engineering Department University of Bristol

This paper presents the results f.om unidirec.ional shaking table tests of.two reduc.d sc.le steel models of.a building f.ame, with one and two f.oors, respec.ively. These f.ames inc.rporate f.ic.ion dissipators at every f.oor. The inputs are sine-dwells and artif.c.al and registered earthquakes. This study is part of.a larger researc. projec. aiming to assess the seismic.ef.ic.enc. of.f.ic.ion dissipators by means of.an integrated numeric.l and experimental approac.. Inside this f.amework, the main objec.ives of.these experiments are to：（i） c.llec. a wide range of.results to c.librate a numeric.l model derived within the projec., （ii） c.arif. some of.the most c.ntroversial issues about f.ic.ion dissipators （inc.uding behavior f.r inputs c.ntaining pulses, c.pac.ty to reduc. resonanc. peaks, introduc.ion of.high f.equenc.es in the response, and self. generated ec.entric.ties）, （iii） better understand their dynamic.behavior, （iv） provide insight on the f.asibility and reliability of.using simple f.ic.ion dissipators f.r seismic.protec.ion of.building struc.ures and （v） c.arac.erize the hysteretic.behavior of.these devic.s. Most of.these objec.ives are satisf.c.orily reac.ed and relevant c.nc.usions are stated.

关键词： building struc.ures earthquake engineering passive c.ntrol f.ic.ion energy dissipators experimentalverif.c.tion shaking table tests

Interac.ive buc.ling of.an inf.ated envelope under mec.anic.l and thermal loads

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Ac.a Mec.anic. Sinic. 2017年第1期33卷 159-172页

作者： c. G. Wang M. X. Liu H. f. Tan c.nter f.r c.mposite Materials Harbin Institute of Technology Harbin 150001 China

This paper eluc.dates the interac.ive buc.ling behaviors of.an inf.ated envelope under c.upled mec.anic.l and thermal loads, espec.ally the longitudinal wrinkling bif.rc.tion and hoop ovalization buc.ling. The longitudinal bending buc.ling proc.ss of.the inf.ated envelope c.n be divided into three c.ntinuous stages, whic. are global buc.ling, interac.ive global-loc.l buc.ling, and kink. A variety of.hoop ovalization buc.ling modes are observed under c.upled mec.anic.l-thermal load. Unlike the mec.anic.l c.se, thermal load leads to a hoop negative ovalization buc.ling. In addition, it c.n ac.elerate the longitudinal c.upled bif.rc.tion and resist the hoop c.upled ovalization buc.ling. Moreover, the bending resistanc. of.the inf.ated envelope will be improved when the length of.the struc.ure is inc.eased, resulting in the dif.ic.lty of.it to bec.me wrinkled. These results provide a new insight into the buc.ling behaviors of.an inf.ated envelope under c.upled external loads, and give a ref.renc. f.r the design of.the inf.ated envelope.

关键词： Mec.anic.l and thermal buc.ling Bif.rc.tion Ovalization c.upled buc.ling

f.nc.ionalization of.AuMSS nanorods towards more ef.ec.ive c.nc.r therapies

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Nano Researc. 2019年第4期12卷 719-732页

作者： c.rolina f. Rodrigues Telma A. Jac.nto Andre f. Moreira Elisabete c. c.sta Sonia P. Miguel Ilidio J. c.rreia c.c.-UBI -c.ntro de Investigagao em c.enc.as da Saude Universidade da Beira Interior Covilhd 6200-506 Portugal c.EPQf.- Departamento de Engenharia Quimic. Universidade de Coimbra Rua 13 Silvio Lima Coimbra 3030-790 Portugal

The applic.tio n of.nano partic.es as selec.ive drug delivery platf.rms arises as one the most promising therapeutic.strategies in the biomedic.l f.eld. Suc. systems c.n enc.psulate drugs, prevent its premature degradation, transport and promote the drugs spec.f.c.delivery to the target site. Among the dif.erent nanostruc.ures, gold-c.re mesoporous silic. shell (AuMSS) nanorods have been one of.the most explored due to their unique physic.l and c.emic.l properties. The mesoporous silic. bioc.mpatibility, high surf.c. area that c.n be easily f.nc.ionalized, tubular pores that c.n store the drugs, c.njugated with the intrinsic.c.pac.ty of.gold nanorod to absorb near-inf.ared radiation, allows the c.mbination of.hyperthermia (i.e., photothermal ef.ec.) with drug delivery, making them a nanoplatf.rms with a huge potential f.r c.nc.r therapy. Nevertheless, the suc.essf.l applic.ti on of.AuMSS nanopartic.es as an ef.ec.ive c.n c.r nano medic.ne is hindered by the unc.n trolled release of.the therapeutic.payloads, limited blood c.rc.lation time and unf.vorable pharmac.kinetic.. In this review, an overview of.the modif.c.ti ons perf.rmed to improve the AuMSS nano rods applic.ti on in nanom edic.ne is provided, highlighting the prac.ic.l approac.es that enhaneed the AuMSS nanorods targeting, responsiveness to dif.erent stimuli, and blood c.rc.lation time. f.rther, the basic. of.AuMSS nano rods syn thesis proc.dures, gen eral properties, and its applic.ti on in c.n c.r therapy are also desc.ibed.

关键词： gold nano rods silic. surf.c. modif.c.tions targeting c.nc.r