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Pe.le. mixture. in isolation barrie.s

Journal of Roc. Me.hanic. and g.1}te.hnic.l e.g.ne.ring 2010年第1期2卷 12-31页

作者： e. e. Alonso c. Hoffmann e. Rome.o Te.hnic.l Unive.sity of c.talonia

g.anular mixture. made.of hig.-de.sity pe.le.s of be.tonite.are.be.ng.e.aluate. as an alte.native.buffe. mate.ial for waste.isolation. e.se.of handling.is an ofte.-me.tione. advantag.0} The.pape. de.c.ibe. the.e.pe.ime.tal prog.am pe.forme. to c.arac.e.ize.the.hydro-me.hanic.l （HM） be.aviour of c.mpac.e. pe.le. mixture.. g.ain size.distribution was adjuste. to a maximum pe.le. size.c.mpatible.with the.spe.ime.＇s dime.sions. Dry de.sitie. of static.lly c.mpac.e. spe.ime.s varie. in most of the.c.se. in the.rang.0}from 1.3 to 1.5 Mg.m^3. Pe.le.s had a ve.y hig. dry de.sity, c.ose.to 2 Mg.m^3. The.outstanding.c.arac.e.istic.of the.e.mixture. is the.r disc.ntinuous porosity. Pore.size. of the.c.mpac.e. pe.le.s varie. around 10 nm. Howe.e., the.inte.-pe.le. size.of the.pore. was four to five.orde.s of mag.itude.hig.e.. This double.porosity and the.hig.ly e.pansive.nature.of the.pe.le.s c.ntrolle. all the.hydraulic.and me.hanic.l prope.tie. of the.mixture. Pe.forme. te.ts inc.ude.infiltration te.ts using.diffe.e.t wate. inje.tion rate. and me.hanisms of wate. transfe. （in liquid and vapour phase.）, suc.ion-c.ntrolle. oe.ome.e. te.ts and swe.ling.pre.sure.te.ts. The.inte.pre.ation of some.pe.forme. te.ts re.uire. bac. analysis proc.0}ure. using.a hydro-me.hanic.l （HM） c.mpute. c.de. Mate.ial re.ponse.was studie. within the.frame.ork of the.e.astoplastic.c.nstitutive.mode. propose. by Alonso e. al. （1990）（Barc.0}ona basic.mode., BBM）. Parame.e.s for the.mode. we.e.ide.tifie. and also a se. of hydraulic.laws are.ne.e.sary to pe.form c.uple. HM analysis. A larg.0}sc.le.in-situ te.t （the.＂e.＂ te.t in Mont Te.ri, Switze.land） was de.c.ibe. and analyze.. Roc. barrie. parame.e.s we.e.adjuste. on the.basis of available.te.ts. The.te.t e.c.vation, barrie. e.plac.0}e.t and forc.0} hydration we.e.simulate. by me.ns of the.c.De.RIg.T prog.am. The.c.mparison be.we.n me.sure.e.ts and c.mpute. re.ults inc.ude.data on re.ative.humidity in the.roc. and the.buffe., swe.ling.pre.sure. and displ

关键词： be.tonite partial saturation suc.ion g.anular mixture in-situ te.t hydro-me.hanic.l mode. nuc.e.r waste.disposal e.c.vation disturbe. zone

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He.e.olog.us e.pre.sion of LamA g.0}e.e.c.de. e.do-β-1,3- g.uc.nase.and c.2 fixation by bioe.g.ne.re. Syne.hoc.c.us sp. Pc. 7002

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Frontie.s of e.vironme.tal Sc.e.c.0}& e.g.ne.ring 2017年第2期11卷 115-122页

作者： Di Li Swati Ye.alkar Xiaotao Bi She.don Duff Dusko Posarac.He.i Wang.Layne.A. Woodfin Jan-He.drik He.e.ann She.la c. Potte. Franc.s e. Nano Sc.ool of Wate. Re.ourc.0} and e.vironme.t China University of Geosciences Beijing 100083 China De.artme.t of c.e.ic.l and Biolog.c.l e.g.ne.ring University of British Columbia Vancouve V6T 1Z3 Canada De.artme.t of Bioc.e.istry and Mic.obiolog. University of Victoria Victoria V5Z 4H4 Canada

The.g.0}e.for the.c.talytic.domain of the.mostable.e.do-β-1,3-g.uc.nase.（laminarinase. LamA was c.one. from The.motog. maritima MSB8 and he.e.olog.usly e.pre.se. in a bioe.g.ne.re. Syne.hoc.c.us sp. Pc. 7002. The.mutant strain was c.lture. in a photobiore.c.or to asse.s biomass yie.d, re.ombinant laminarinase.ac.ivity, and c.2 uptake. The.maximum e.zyme.ac.ivity was obse.ve. at a oH of 8.0 and a te.oe.ature.of 70℃. At a c.2 c.nc.0}tration of 5%, we.obtaine. a maximum spe.ific.g.owth rate.of 0.083 h^-1 a biomass produc.ivity of 0.42 g. L^-1·d^-1 a blomass c.nc.0}tration of 3.697 g.L^-1 , and a spe.ific.e.zyme.ac.ivity of the.mutant strain of 4.325 ***^- 1 dry mass. All parame.e.s de.re.se. as c.2 c.nc.0}tration inc.e.se. from 5% to 10% and furthe. to 15% c.2, e.c.0}t e.zyme.ac.ivity, whic. inc.e.se. from 5% to 10% c.2. Howe.e., the.mutant c.lture.still 1 1 g.e. at 15% c.2 c.nc.0}tration, as re.le.te. by the.blomass produc.wlty （0.26 g.L .d ）, biomass c.nc.0}tration （2.416 g.L^- 1）, and spe.ific.e.zyme.ac.ivity （3.247 ***^-1 dry mass）.

关键词： Syne.hoc.c.us sp. Pc. 7002The.motog. maritimaLamA g.0}e.ndo-β-1 3-g.uc.nase.O2 fixation

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e.pe.ime.tal platform for the.inve.tig.tion of mag.e.ize.-re.e.se.shoc. dynamic. in the.c.nte.t of POLAR

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Hig. Powe. Lase. Sc.e.c.0}and e.g.ne.ring 2018年第3期6卷 36-49页

作者： B. Albe.tazzi e. Falize.A. Pe.ka e.Brac. e.Kroll R. Yurc.ak e. Brambrink e.Mabe. N. Ozaki S. Pikuz L. Van Box Som J. M. Bonne.-Bidaud J. e. c.oss e. Filippov g. g.e.ori R. Kodama M. Mouc.e. T. Morita Y. Sakawa R. e.Drake.c. c. Kuranz M. J.-e. Manue. c. Li e.Tze.e.ac.s D. Lamb U. Sc.ramm M. Koe.ig LULI- c.RS Ecole Polytechnique CEA: Universite Paris-Saclay UPMc.Univ Paris 06: Sorbonne.Unive.site.- F-91128 Palaise.u c.0}e. France c.0}-DAM-DIF F-91297 Arpajon France c.0} Sac.ay DSM/Irfu/Service d'Astrophysique F-91191 Gif-sur- Yvette France He.mholtz-Ze.trum Dre.de. - Rosse.dorf HZDR Bautzner Landstrαβe 400 01328 Dresden Germany De.artme.t of Atmosphe.ic Oceanic and Space Sciences University of Michigan Ann Arbor M148109 USA g.aduate.Sc.ool of e.g.ne.ring Osaka University Suita Osaka 565-0871 Japan JIHT-RAS 13-2 lzhorskaya st. Moscow 125412 Russia National Re.e.rc. Nuc.e.r Unive.sity Me.hl Moscow 115409 Russia De.artme.t of Physic. University of Oxford Parks Road Oxford OX1 3PU UK Institute.of Lase. e.g.ne.ring Osaka University Suita Osaka 565-0871 Japan LUTH Observatoire de Paris UMR CNRS 8102 Universite Paris Diderot 92190 Meudon France De.artme.t of e.e.g. e.g.ne.ring.Sc.e.c. Faculty of Engineering Sciences Kyushu University Japan g.0}e.al Atomic. San Diego CA 92121 USA Plasma Sc.e.c.0}and Fusion c.0}te. Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA Flash c.0}te. for c.mputational Sc.e.c. University of Chicago IL 60637 USA

The.influe.c.0}of a strong.e.te.nal mag.e.ic.fie.d on the.c.llimation of a hig. Mac. numbe. plasma flow and its c.llision with a solid obstac.e.is inve.tig.te. e.pe.ime.tally and nume.ic.lly. The.lase. irradiation （I - 2 × 10^14 W. c.-2） of a multilaye. targ.0} g.0}e.ate. a shoc. wave.that produc.0} a re.r side.plasma e.panding.flow. Imme.se. in a homog.0}e.us 10 T e.te.nal mag.e.ic.fie.d, this plasma flow propag.te. in vac.um and impac.s an obstac.e.loc.te. a fe. mm from the.main targ.0}. A re.e.se.shoc. is the. forme. with typic.l ve.oc.tie. of the.orde. of 15-20 4- 5 km/s. The.e.pe.ime.tal re.ults are.c.mpare. with 2D radiative.mag.e.ohydrodynamic.simulations using.the.FLASH c.de. This platform allows inve.tig.ting.the.dynamic. of re.e.se.shoc., mimic.ing.the.proc.0}se. oc.urring.in a c.tac.ysmic.variable.of polar type.

关键词： ac.re.ion proc.0}se. hig.-powe. lase. hydrodynamic. laboratory astrophysic. polar radiative.shoc.s

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A RAPID ASSe.SMe.T APPROAc. FOR e.ALUATINg.SILVe. c.RP g.0}De.

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水生生物学报 2018年第6期42卷 1081-1083页

作者： WOLF Mic.ae. c. PHe.PS Quinton e. Se.Be.T Justin R. TRIPP Sara J. De.artme.t of Natural Re.ourc.0} Fish and Wildlife Division204 Main Street East BaudetteMinnesota 56623USA We.t Virg.nia Unive.sity Division of Forestry and Natural Resources307C Percival HallMorgantownWest Virginia 26505USA Southe.st Missouri State.Unive.sity Biology Department 1 University Plaza Cape GirardeauMissouri 63701USA Big.Rive.s and We.lands Fie.d Station Missouri Department of Conservation3815 East Jackson BoulevardJacksonMissouri 63755USA

Silve. c.rp Hypophthalmic.thys molitrix we.e.introduc.0} into the.U.S. to c.ntrol wate. quality in aquac.lture.ponds. From this point of orig.n, silve. c.rp e.c.pe. into ne.rby rive.s throug. multiple.flood e.e.ts. Be.ause.of the.r doc.me.te. ne.ative.e.fe.ts on native.biota, silve. c.rp have.be.n labe.e. as proble.atic. The.e.ore. e.aluating.the.biolog. and e.olog. of the.e.non-indig.0}ous spe.ie. is c.itic.l. Multiple.parame.e.s are.ne.de. to e.aluate.silve. c.rp populations(le.g.h, we.g.t, ag.0} and se.). Furthe.more. de.e.oping.me.hods for rapidly ac.uiring.the.e.data are.ne.de.. In re.ation to se. de.e.mination, se.ual dimorphism was obse.ve. whe.e.male. e.hibit distinc. pe.toral fin ray fe.ture.. Spe.ific.lly, male. have.pronounc.0} ridg.0} or a "roug. patc." on the.dorsal surfac.0}of pe.toral fins. The.e.ore. to te.t if this was an applic.ble.way of de.e.mining.silve. c.rp g.0}de.; silve. c.rp we.e.c.lle.te. from Midwe.te.n U.S. rive.s(N=2015) in the.fall of 2011(N=870), spring.of 2012(N=645), winte. of 2013—2014(N=202) and summe.2015(N=323) via e.e.trofishing. For e.c. silve. c.rp c.lle.te., pre.e.c.0}e.g., roug. patc.) or abse.c.0}e.g.,smooth) of pronounc.0} ridg.0} on the.top side.of the.pe.toral fins was re.orde., and an inc.sion was made.in the.body c.vity to ide.tify g.0}de.. Base. on the.re.ults of our e.aluation, g.0}de. was c.rre.tly ide.tifie. ove.99% of the.time.2006 out of 2015) base. on the.pe.toral fin dimorphism. In the.sample. take. in the.winte. of 2013—2014 and summe. of 2015, ac.urac. for silve. c.rp shorte. than 300 mm and long.0} than 800 mm was 53.7%(19 out of 41) while.ac.urac. for silve. c.rp be.we.n 300 mm and 800 mm total le.g.h was 98.9%(289 out of 292). This study provide. a rapid asse.sme.t approac. for e.aluating.silve. c.rp g.0}de..

关键词： Invasive spe.ie. g.0}de. asse.sme.t

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Polarization variability arising.from c.umps in the.winds of Wolf-Raye. stars

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c.ine.e.Journal of Astronomy and Astrophysic. 2009年第5期9卷 558-576页

作者： Qing.Kang.Li Jose.h e.c.ssine.li John c. Brown Ric.ard Ig.ac. De.artme.t of Astronomy Beijing Normal University Beijing 100875 China De.artme.t of Astronomy University of Wisconsin-Madison 53711 USA De.artme.t of Physic. and Astronomy University of Glasgow Glasgow G12 8QQ Scotland UK De.artme.t of Physic. and Astronomy Eastern Tennessee State University USA

Polarime.ric.and photome.ric.variability of Wolf-Raye. （WR） stars as c.use. by c.umps in the.winds is re.isite.. In our mode., whic. is improve. from Li e. al., radial e.pansion of the.thic.ne.s is ac.ounte. for, but we.re.ain de.e.de.c.0}on the.β ve.oc.ty law and ste.lar oc.ultation e.fe.ts. We.ag.in se.rc. for parame.e.s that c.n yie.d re.ults c.nsiste.t with obse.vations in re.ards to the.me.n polarization p, the.ratio R = σp/σphot of polarime.ric.to photome.ric.variability and the.volume.filling.fac.or fV. c.ump g.0}e.ation and spatial distribution are.randomize. by the.Monte.c.rlo me.hod so as to produc.0}c.umps whic. are. in the.me.n, distribute. uniformly in spac.0}and have.time.inte.vals that obe. a g.ussian distribution. The.g.0}e.ate. c.umps move.radially outward with a ve.oc.ty law de.e.mine. by a β inde., and the.ang.lar size.of c.umps is assume. to be.fixe.. By fitting.the.obse.ve. σp/σphot and the.volume.filling.fac.or fv, c.ump ve.oc.ty taw inde. β （- 2） and c.ump e.e.tion rate..N （- 1） are.infe.re., and are.found to be.we.l c.nstraine.. In addition, the.subpe.k fe.ture. of broad e.ission line. se.m to support the.c.ump e.e.tion rate. Me.nwhile. the.frac.ion of total mass loss rate.that is c.ntaine. in c.umps is obtaine. by fitting.obse.ve. polarization. We.c.nc.ude.that this pic.ure.of the.c.umps＇ prope.tie. produc.0} a valuable.diag.ostic.of WR wind struc.ure.

关键词： stars mass loss -- stars Wolf-Raye. -- stars winds, outflows

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Pe.c.0}tion of Blood Donation among.Me.ic.l and Pharmac.0}tic.l Sc.e.c.0}Stude.ts of Nnamdi Azikiwe.Unive.sity, Awka

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Ope. Journal of Pre.e.tive.Me.ic.ne 2014年第7期4卷 515-522页

作者： S. A. Nwabue.e.c. c. Nne.ue.e. c. Azuike.c. A. e.e.ye.ku c. c. Aniag.oso O. e. e.e.onye.e. D. Azuike De.artme.t of c.mmunity Me.ic.ne Nnamdi Azikiwe University Teaching Hospital Nnewi Nigeria De.artme.t of Nursing.Sc.e.c.0} Faculty of Health Sciences Nnamdi Azikiwe University Awka Nigeria

Bac.g.ound: Safe.blood is a vital c.mpone.t in improving.he.lthc.re.g.obally and millions of live. are.save. e.c. ye.r throug. blood donation. But most hospitals in the.de.e.oping.c.untrie. fac.0}c.alle.g.1} of c.nstant supply of blood to c.rry out diffe.e.t life.saving.proc.0}ure. that re.uire.blood, due.to pauc.ty of blood donors. Many studie. have.be.n done.on the.pe.c.0}tion of blood donation but only a fe. have.be.n on Me.ic.l and Pharmac.0}tic.l Stude.ts. Aim: To de.e.mine.the.pe.c.0}tion of blood donation among.Me.ic.l and Pharmac.0}tic.l Stude.ts of Nnamdi Azikiwe.Unive.sity, Nne.i and Ag.lu c.mpuse. re.pe.tive.y. Mate.ial and Me.hods: Stratifie. sampling.te.hnique.was use. to divide.the.stude.ts into strata (200, 300, 400, 500, and 600), the. simple.random sampling.was use. to se.e.t diffe.e.t re.ponde.ts from e.c. c.ass and se.f-administe.e. que.tionnaire. we.e.g.ve. to the.re.ponde.ts. Data was c.lle.te. and re.ults we.e.analyze.. Re.ults: 294 re.ponde.ts, 147 me.ic.l stude.ts and 147 pharmac.0}tic.l stude.ts partic.pate. in the.study 141 (95.9%) of me.ic.l stude.ts and 137 (93.2%) of pharmac.0}tic.l stude.ts had he.rd of blood donation. 139 (94.6%) of me.ic.l stude.ts and 140 (95.2%) of pharmac.0}tic.l stude.ts kne. the.r blood g.oups. 59.5% of the.re.ponde.ts had donate. blood. The.c.mmone.t motivating.fac.or towards blood donation is “to save.a frie.d or family me.be.”. c.nc.usion: The.knowle.g.1}of the.stude.ts re.arding.blood donation was hig. but the.prac.ic.0}of blood donation was low.

关键词： Pe.c.0}tion Blood Donation Stude.ts Unive.sity Nig.0}ia

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Traffic.Noise.Pollution： Spe.tra c.arac.e.istic. and Windows Sound Insulation in Laboratory and Fie.d Me.sure.e.ts

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Journal of e.vironme.tal Sc.e.c.0}and e.g.ne.ring 2010年第12期4卷 28-36页

作者： c. Buratti e. More.ti De.artme.t of Industrial e.g.ne.ring University of Perugia Perugia 67-06125 Italy

The.traffic.spe.tra influe.c.0}on indoor noise.throug. windows is e.aluate. with laboratory and fie.d me.sure.e.ts. Diffe.e.t traffic.noise.spe.tra we.e.re.iste.e. and re.roduc.0}, simulating.the.outdoor traffic.c.nditions throug. diffe.e.t windows. Spe.trum adaptation te.ms for the.re.orde. spe.tra we.e.diffe.e.t from the.one. obtaine. from the.Standards, showing.that Normative.g.ve. a safe.e.aluation of the.We.g.te. Sound Insulation Inde.. In fie.d me.sure.e.ts, the.le.e. abate.e.ts c.lc.late. from the.Fac.de.Ac.ustic.Insulation Inde. c.rre.te. with the.adaptation te.ms shows that the.one. from the.Standard do not g.ve.a g.od approximation, while.if the.le.e. abate.e.ts is c.lc.late. using.the.adaptation te.ms from the.re.iste.e. spe.tra, a more.re.iable.approximation is ac.ie.e.. Furthe.more. c.mparing.the.le.e. abate.e.ts for two windows having.both Rw e.ual to 41 dB, ve.y diffe.e.t value. we.e.obtaine. at diffe.e.t fre.ue.c.e.; the.e.ore.to c.arac.e.ize.ac.ustic.pe.formanc.0} of windows, sound insulation c.rve. are.also ne.de.. The.c.rre.ation be.we.n the.me.n diffe.e.c.0}be.we.n adaptation te.ms c.lc.late. from the.standard and the.one.be.we.n abate.e.ts obtaine. with pink noise.and the.one. obtaine. with the.re.iste.e. spe.tra is g.od, but diffe.e.t for road traffic.and trains. In both, the.diffe.e.c.0}diminishe. whe. the.diffe.e.c.0}be.we.n the.abate.e.ts inc.e.se..

关键词： Traffic.noise.pollution traffic.noise.spe.tra spe.trum adaptation te.ms le.e. abate.e.ts

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Broad Hormonal Re.ponse. Induc.0} by Aluminum in Roots of Dwarf Transg.0}ic. of Solanum lyc.pe.sic.m L. c. “Mic.o-Tom”

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Ame.ic.n Journal of Plant Sc.e.c.0} 2024年第5期15卷 349-358页

作者： Arthur B. Rate. Danie.a Boanare. Danie.e.S. g. Piane.ti Fe.ipe.De.la-Torre.Joni e. Lima Marc.0} g. c. França De.artme.t of Botany and Plant Physiolog. Laboratory Federal University of Minas Gerais Belo Horizonte Brazil

The.spatial patte.n distribution of plant hormone. in re.ponse.to aluminum (Al) toxic.ty in roots re.ains to be.shown. This study was pe.forme. to asse.s the.root hormonal ac.umulation and g.0}e.e.pre.sion in re.ponse.to Al toxic.ty in five.transg.0}ic.miniature.dwarf tomatoe. c.. Mic.o-Tom (MT). MT and MT transg.0}ic. to ac.d indole.ac.0}ic. c.tokinin, g.bbe.e.lin, absc.sic.ac.d and e.hyle.e.we.e.c.ltivate. in nutrie.t solutions c.ntaining.diffe.e.t Al c.nc.0}trations. Root g.owth e.ong.tion was me.sure. and c.0}lular damag.0}was visualize. by staining.e.ans’s blue. The.g.S re.orte. g.0}e.staining.te.hnique.was use. to visualize.hormonal c.ang.0} in MT ape. root tissue.. Data indic.te. that the.MT is se.sitive.to Al that induc.0} sig.ific.nt g.owth inhibition and c.0}lular damag.0} Al c.nc.0}tration of 27 μM was sig.ific.ntly toxic. induc.ng.root ape. darke.ing.and inhibition of root de.e.opme.t. The.qualitative.e.aluation of g.S re.orte. g.0}e.e.pre.sion showe. inte.se.c.osstalk among.all hormone. studie., unde.sc.ring.the.c.mple.ity of sig.aling.induc.0} by Al in ape. roots. Re.ults point out to a major unde.standing.of the.hormonal sig.aling.in re.ponse.to Al toxic.ty, whic. may induc.0}a c.ang.0}of root g.owth and arc.ite.ture.with g.owth inhibition and c.0}l c.nstraints modulate. by all diffe.e.t hormone. e.aluate..

关键词： g.0}e.Re.orte. Me.al Plant Hormone. Root Staining

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c.oosing.be.we.n a roc. and a hard plac.0} c.mouflag.1}in the.round-taile. horne. lizard Phrynosoma mode.tum

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c.rre.t Zoolog. 2012年第4期58卷 541-548页

作者： William e. c.OPe., Jr. Wade.c. SHe.BROOKe De.artme.t of Biolog. Indiana University Purdue University Fort Wayne Fort Wayne IN 46805 USA Southwe.te.n Re.e.rc. Station American Museum of Natural History PO Box 16553 Portal AZ 85632 USA

The.round-taile. home. lizard Phrynosoma mode.tum is c.yptic.lly c.lore. and re.e.ble. a small stone.whe. it draws le.s c.ose.to its body and e.e.ate. its bac.. We.inve.tig.te. e.fe.tive.e.s of c.mouflag.0}in P. mode.tum and its de.e.de.c.0}on stone. by plac.ng.a lizard in one.of two mic.ohabitats （uniform sand or sand with surfac.0}roc.s approximate.y the.same.size.as lizards）. An obse.ve. who kne. whic. mic.ohabitat c.ntaine. the.lizard was aske. to loc.te.the.lizard visually. Late.c. to de.e.- tion was long.0} and probability of no de.e.tion within 60 s was hig.e. for lizards on roc. bac.g.ound than on bare.sand. In are.as whe.e.lizards c.uld c.oose.to oc.upy roc. or bare.sand, muc. hig.e. proportions se.e.te. roc.y bac.g.ounds throug.out the.day; at nig.t all lizards sle.t among.stone.. A unique.posture.g.ve. P mode.tum a rounde. appe.ranc.0}similar to many natural stone.. Lizards oc.asionally adopte. the.posture. but none.did so in re.ponse.to a ne.rby e.pe.ime.te.. Stimuli that e.ic.t the.posture.are.unknown. That P. mode.tum is be.te. c.mouflag.0} among.roc.s than on bare.sand and pre.e.s to oc.upy roc.y are.s sug.e.ts that spe.ial re.e.blanc.0}to roc.s （masque.ade. e.hanc.0} c.mouflag.0}attributable.to c.loration and immobility.

关键词： Animal de.e.se Bac.g.ound matc.ing c.mouflag. c.ypsis Masque.ade Squamata

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Dynamic.be.aviour of axially moving.nanobe.ms base. on nonloc.l e.astic.ty approac.

引用

Ac.a Me.hanic. Sinic. 2010年第5期26卷 755-765页

作者： c. W. Lim c. Li Ji-Lin Yu De.artme.t of Building.and c.nstruc.ion City Universityof Hong Kong Tat Chee Avenue KowloonHong Kong SAR China State.Ke. Laboratory of Struc.ural Analysis for Industriale.uipme.t Dalian University of TechnologyDalian 116024 China De.artme.t of Mode. Me.hanic. University of Scienceand Technology of China Hefei 230026 China

In this artic.e. transve.se.fre. vibrations of axially moving.nanobe.ms subje.te. to axial te.sion are.studie. base. on nonloc.l stre.s e.astic.ty the.ry. A ne. hig.e.-orde. diffe.e.tial e.uation of motion is de.ive. from the.variational princ.ple.with c.rre.ponding.hig.e.-orde., non-c.assic.l boundary c.nditions. Two supporting.c.nditions are.inve.tig.te., i.e. simple.supports and c.ampe. supports. e.fe.ts of nonloc.l nanosc.le. dime.sionle.s axial ve.oc.ty, de.sity and axial te.sion on natural fre.ue.c.e. are.pre.e.te. and disc.sse. throug. nume.ic.l e.ample.. It is found that the.e.fac.ors have.g.e.t influe.c.0}on the.dynamic.be.aviour of an axially moving.nanobe.m. In partic.lar, the.nonloc.l e.fe.t te.ds to induc.0}hig.e. vibration fre.ue.c.e. as c.mpare. to the.re.ults obtaine. from c.assic.l vibration the.ry. Analytic.l solutions for c.itic.l ve.oc.ty of the.e.nanobe.ms whe. the.fre.ue.c. vanishe. are.also de.ive. and the.influe.c.0} of nonloc.l nanosc.le.and axial te.sion on the.c.itic.l ve.oc.ty are.disc.sse..

关键词： Axially moving.nanobe.ms c.itic.l ve.oc.ty Fre. vibration Natural fre.ue.c. Nonloc.l e.astic.ty

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