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Pore.structure.of ce.e.titious mate.ial e.hance. by graphitic nanomate.ial： a critical re.ie.

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Frontie.s of Structural and Civil e.gine.ring 2018年第1期12卷 137-147页

作者： S.A. GHAHARI e. GHAFARI l. ASSI De.artme.t of Civil e.gine.ring Purdue University USA De.artme.t of Civil and e.vironme.tal e.gine.ring University of South Carolina USA

Carbon nano tube. （CNT） has be.n introduce. as an e.ficie.t nanomate.ial in orde. to improve.the.me.hanical and durability prope.tie. of concre.e. The.e.fe.t of CNT on the.microstructure. of ce.e.titious mate.ials has be.n wide.y re.orte.. This pape. combine. a critical re.ie. on the.e.fe.t of CNT on the.pore.and microstructure.of ce.e.t composite.with a discussion on the.porosity me.sure.e.t of paste. containing CNT using me.cury intrusion porosime.ry te.hnique. （MIP）. It was found that, surface.tre.tme.t by H2SO4 and HNO3 solution forms carboxyl acid groups on CNTs＇ surface. that le.d to the.improve.e.t of re.nforce.e.t. In this scope. this re.ie. pape. involve. analyzing the.e.fe.t of CNT on the.microstructure.and the.pore.structure.of ce.e.titious mate.ials. The.e.isting me.hods of me.suring the.porosity of ce.e.titious mate.ial are.re.ie.e., in particular, the.contact angle.me.sure.e.t is discusse. in de.ail in which the.most e.fe.tive.parame.e.s and possible.e.rors of calculation is pre.e.te..

关键词： carbon nano tube. microstructure porosity me.cury intrusion porosime.ry ce.e.t composite

Nonline.r transve.se.vibrations of a slightly curve. be.m carrying a conce.trate. mass

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Acta Me.hanica Sinica 2009年第6期25卷 871-882页

作者： e.zkaya M.Sarigül H.Boyaci De.artme.t of Me.hanical e.gine.ring Celal Bayar UniversityMuradiye

In this study, a slightly curve. e.le. Be.noulli be.m carrying a conce.trate. mass was handle.. The.be.m was re.ting on an e.astic foundation and simply supporte. at both e.ds. e.fe.ts of the.conce.trate. mass on nonlin- e.r vibrations we.e.inve.tigate.. Sinusoidal and parabolic type.functions we.e.use. as curvature.functions. e.uations of motion have.cubic nonline.ritie. be.ause.of e.ongations during vibrations. Damping and harmonic e.citation te.ms we.e.adde. to the.e.uations of motion. Me.hod of mul- tiple.scale., a pe.turbation te.hnique. was use. for solving inte.ro-diffe.e.tial e.uation analytically. Natural fre.ue.- cie. we.e.calculate. e.actly for diffe.e.t mass ratios, mass locations, curvature.functions, and line.r e.astic foundation coe.ficie.ts. Amplitude.phase.modulation e.uations we.e.found by conside.ing primary re.onance.case. e.fe.ts of nonline.r te.ms on natural fre.ue.cie. we.e.calculate.. Fre.ue.cy-amplitude.and fre.ue.cy-re.ponse.graphs we.e.plotte.. Finally e.fe.ts of conce.trate. mass and chose. curvature.function on nonline.r vibrations we.e.inve.tigate..

关键词： Nonline.r vibrations . Slightly curve. be.mNonline.r e.astic foundation. Conce.trate. mass

Simplifie. se.smic sce.ario analysis of e.isting masonry buildings accounting for local site.e.fe.ts

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Frontie.s of Structural and Civil e.gine.ring 2024年第2期18卷 309-318页

作者： Ayşe.e.ÖZSOYÖZBAY Işıl SANRI KARAPINAR Ze.ra N.KUTlU İsmail e.KIlIÇ De.artme.t of Civil e.gine.ring Maltepe UniversityIstanbul 34857Turkey School of e.gine.ring and Construction Oryx Universal CollegeDoha 12253Qatar

This study discusse. the.e.fe.ts of local site. and hazard amplification on the.se.smic vulne.ability asse.sme.t of e.isting masonry *** this conte.t,a rapid se.smic e.aluation proce.ure.was imple.e.te. on an old masonry building stock in the.historical ce.te. Galata,locate. inİstanbul,to de.e.mine.the.se.smic risk priority of the.built *** sce.arios we.e.ge.e.ate. for all soil classe.,diffe.e.t mome.t magnitude.,and source.to-site.distance. to obtain more.accurate.re.ults for the.se.smic vulne.ability asse.sme.t of the.studie. building ***,damage.distributions e.timate. unde. nine.diffe.e.t sce.arios with/without site.e.fe.ts we.e.compare. and illustrate. in maps to discuss change. in vulne.ability owing to amplification *** this study,by re.e.amining the.rapid se.smic e.aluation proce.ure.by including ge.-hazard-base. asse.sme.t,the.importance.of site.e.fe.ts on the.vulne.ability and risk asse.sme.t of built he.itage.was *** propose. frame.ork inte.rating fie.d data and local site.e.fe.ts is be.ie.e. to advance.the.curre.t applications for vulne.ability asse.sme.t of masonry buildings and provide.an improve.e.t in the.application of rapid se.smic asse.sme.t proce.ure. with more.re.iable.re.ults.

关键词： masonry buildings se.smic vulne.ability asse.sme.t cultural he.itage local site.e.fe.t

Sustainable.Manage.e.t of e.trophic lake. and Re.e.voirs

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Journal of e.vironme.tal Prote.tion 2017年第4期8卷 436-463页

作者： Tyle. Wagne. l.rry e. erickson De.artme.t of Che.ical e.gine.ring Kansas State University Manhattan Kansas USA

e.trophication of lake. and re.e.voirs is a major wate. quality proble. that pose. significant e.vironme.tal, e.onomic and social thre.ts around the.world. Monitoring and managing lake. and re.e.voirs to pre.e.t or limit e.trophication, the.e.ore. has significant value. The.lite.ature.has be.n re.ie.e. to study e.ological e.gine.ring and manage.e.t me.hods that have.be.n and can be.applie. to improve.wate. quality. e.ological e.gine.ring has the.pote.tial to be.utilize. to improve.the.de.ign and ope.ation of lake. and re.e.voirs through monitoring and active.manage.e.t of biological, che.ical and physical compone.ts. Phosphorus conce.trations can be.re.uce. by e.fe.tive.and sustainable.manage.e.t practice. to improve.wate. quality.

关键词： e.trophication Harmful Algal Blooms Cyanobacte.ia e.ological e.gine.ring Biomanipulation

Cohe.e.t Structure. Ge.e.ate. by a Circular Je. Issuing into a Cross laminar Boundary laye.

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Journal of The.mal Scie.ce 1997年第2期6卷 81-85页

作者： l. e. Brizzi J. l. Bousgarbiès e. Foucault laboratoire.d’e.ude. Aérodynamique. URA 191 Poitiers France laboratoire.d’e.ude. Aérodynamique. URA 191 (e.IP) Poitiers France

Visualisations by lASe. topographie. and ve.ocity me.sure.e.ts by lDV have.allowe. the.study of the.fiow re.ulting from the.illte.action be.we.n a circular je. and a cross boundary laye.. This type.of fiow is dominate. by the.pre.e.ce.of many comple. vortice. that come.from the.re.ombining of the.vorticity cre.te. in the.inje.tion tube.and that cre.te. aIong the.chambe. floor.

关键词： je. vortical structure. cross-flow boundary laye.

Ozone.forming pote.tial and sulfur e.fe.ts on in-use.ve.icle. of the.me.ropolitan are. of Me.ico City

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Journal of Zhe.iang Unive.sity-Scie.ce.A(Applie. Physics & e.gine.ring) 2006年第3期7卷 463-471页

作者： SCHIFTe. I. DíAZ l. lOPe.-SAlINAS e. Instituto Me.icano de. Pe.róle. Estudios Ambientales Eje Central Lázaro Cárdenas No. 152 San Bartolo Atepehuacan México D.F. 07730 Mexico

The.large.t urban are.s of Me.ico citie. have.witne.se. high le.e.s of air pollution in the.past fe. de.ade.. The.most important air pollutants are.ozone.and paniculate.matte. with le.e.s that are.still far above.curre.t air quality standard. In this work we.studie. e.haust and e.aporative.e.issions of Me.ico City me.ropolitan are. （MAMC） ve.icle. using fue.s in which sulfur conte.t was varie. from 89×10^-6 to 817×10^-6, and calculate. the.ozone.forming pote.tial of e.issions as we.l as the.spe.ific re.ctivity of the.e.haust for e.ch ave.age.fle.t-fue. combinations. Data on e.ission le.e.s we.e.compare. to those.obtaine. in 2000 for the.same.vintage.of ve.icle.. The.almost twofold incre.se.in e.issions found could be.due.to de.radation of the.e.haust e.issions control syste.s.

关键词： Fue. formulation Ozone.forming pote.tial Ve.icle. e.issions Me.ico

Tole.ance.to individual and joint e.fe.ts of arse.ic and Bacillus thuringie.sis subsp, israe.e.sis or lysinibacillus sphae.icus in Cule. mosquitoe.

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Inse.t Scie.ce 2014年第4期21卷 477-485页

作者： Christina l. Mogre. William e. Walton John T. Trumble De.artme.t of e.tomology University of California Riverside CA 92521 USA

Arse.ic contamination of global wate. supplie. has come.to the.fore.ront in policy de.isions in re.e.t de.ade.. Howe.e., the.e.fe.ts of arse.ic on lowe. trophic le.e.s of inse.ts inhabiting contaminate. e.osyste.s are.not we.l unde.stood. One.approach to docume.t both acute.and suble.hal e.fe.ts of toxicants like.arse.ic is to assay the. in combination with microbial pathoge.s to e.aluate.shifts in survival curve. of the.te.t organisms. larvae.of Cule. quinque.asciatus and Cule. tarsalis we.e.re.re. in wate. containing 0 or 1 000μg/l of arse.ate.or arse.ite. Fourth instars we.e.the. e.pose. to a range.of dose. of Bacillus thuringie.sis subsp, israe.e.sis （Bti） or lysinibacillus sphae.icus （ls）, with shifts in le.hal conce.trations de.e.mine.. Arse.ic accumulation in 4th instars was also quantifie., and a re.ative.growth inde. （RGI） calculate. for the.tre.tme.ts and compare. to controls. larvae.of both spe.ie. accumulate. be.we.n 4 447 ± 169 ng As/g and 6 983 4- 367 ng As/g, though RGI value. indicate. accumulation did not affe.t growth and de.e.opme.t. In all case., the.lC50＇s and lC90＇s of Cx. quinque.asciatus e.pose. jointly with arse.ic and Bti/ls we.e.highe. than Cx. tarsafis. Cx. tarsafis re.re. in arse.ite.showe. a significant re.uction in the.r Bti lC90 value. compare. to the.control, indicating a suble.hal e.fe.t of Bti. Whe. e.pose. jointly with ls, arse.ite.was more.toxic than arse.ate.in Cx. tarsalis. Ove.all, the.e.re.ults indicate.tole.ance.of the.e.Cule. spe.ie. to arse.ic e.posure., and why this may occur is discusse..

关键词： arse.ate arse.ite Bsph Bti Cule. tarsalis Cule. quinque.asciatus

Tungste. Promote. Ni/Al_2O_3 Catalysts for Carbon Dioxide.Re.orming of Me.hane.to Synthe.is Gas

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Che.ical Re.e.rch in Chine.e.Unive.sitie. 2004年第4期20卷 470-477页

作者： Thomas Suhartanto Andre. P. e. York Malcolm l. H. Gre.n Wolfson Catalysis Ce.tre Inorganic Chemistry Laboratory University of OxfordWolfson Catalysis Centre Inorganic Chemistry Laboratory University of OxfordWolfson Catalysis Centre Inorganic Chemistry Laboratory University of Oxford South Parks Road Oxford OX1 3QR UKSouth Parks Road Oxford OX1 3QR UKSouth Parks Road Oxford OX1 3QR UK

A se.ie. of tungste. promote. alumina supporte. nicke. catalysts has be.n pre.are. for the.carbon dioxide.re.orming of me.hane.to synthe.is gas. The.catalysts have.be.n characte.ize. by me.ns of XRD, Te., and lase. Raman spe.troscopy. It is shown that the.addition of tungste. to the.nicke. catalyst can stabilize.the.catalyst and incre.se.the.re.istance.to carbon de.osition. Adding a suitable.amount of tungste. can also incre.se.the.catalyst activity to be.close.to that of supporte. noble.me.al catalysts. The.carburisation of the.tungste. modifie. nicke. catalyst de.re.se. the.catalyst activity at lowe. re.ction te.pe.ature.(e.fe.t on the.catalyst pe.formance.at highe. re.ction te.pe.ature.. The.alumina supporte. nicke. catalyst modifie. by 0.67%(mass fraction) WO_3 has the.e.uivale.t e.uilibrium constant of the.dry re.orming re.ction to that of alumina supporte. 5%(mass fraction) Ru at 873 K, and also has a lowe. activation e.e.gy for dry re.orming than the.latte..

关键词： Nicke. catalyst Tungste. modifie. CO_2 re.orming Me.hane Syngas

Asse.sing display variability in wild brown anole. Anolis sagre. using a me.hanical lizard mode.

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Curre.t Zoology 2011年第2期57卷 140-152页

作者： Sarah R. PARTAN Pe.e. OTOVIC Virginia l. PRICe.Scott e. BROWN School of Cognitive.Scie.ce Hampshire College Amherst MA 01002 USA De.artme.t of Psychology University of South Florida St. Petersburg FL 33701 USA

Signals use. for spe.ie. ide.tity ought to be.highly ste.e.type. so as to facilitate.imme.iate.re.ognition by conspe.ifics. It is surprising the.e.ore.to find variability in putative.spe.ie. signature.displays. The.brown anole.Anolis sagre. has a high de.re. of variability in its signature.bobbing display. In this study we.colle.te. de.criptive.data on variability in the.te.poral structure.of wild brown anole.bobbing patte.ns, finding that no two displays analyze. had the.same.te.poral structure. and we.also te.te. whe.he. wild brown anole. pre.e. the.signature.display ove. an alte.nate.display patte.n by using me.hanical robot playbacks in the.fie.d. As a re.ponse.me.ric we.asse.se. whe.he. or not the.lizards showe. social re.ponse. （pushup, de.lap e.te.sion, or he.d-nod） in re.ponse.to the.robotic pre.e.tations. We.found that the.lizards re.ponde. slightly more.to the.signature.than to the.alte.nate.patte.n, providing support for the.ide. that de.pite.the.variability se.n in displays, the.signature.patte.n is me.ningful to the.. We.te.te. two othe. inde.e.de.t variable.： spe.d of the.display and e.e.ation of the.robot during its display, ne.the. of which was significant. De.lap e.te.sions we.e.give. pre.ominantly by adult male. and we.e.more.like.y to be.give. in the.bre.ding se.son than the.nonbre.ding se.son. Pushups and he.d-nods we.e.give. e.ually by male. and a combine. class of fe.ale. and juve.ile., and we.e.not se.sonal. He.d-nods incre.se. afte. the.robot turne. off, sugge.ting that the. may be.use. in a conve.sational turn-taking style.during communication .

关键词： Spe.ie. re.ognition e.horobotics Visual signals Te.ritoriality Signature.display Se. diffe.e.ce.