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Thre.-to-one.inte.nal re.onance.in m.ltiple.ste.pe. be.m.syste.0}

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Applie. m.the.0}tics and m.chanics(e.glish e.ition) 2009年第9期30卷 1131-1142页

作者： A. Te.in e. zkaya S. m. Bagdatlh Te.hnical Vocational School of Highe. e.ucation Celal Bayar University De.artm.nt of m.chanical e.gine.ring Celal Bayar University

In this study, the.vibrations of m.ltiple.ste.pe. be.m. with cubic nonline.ritie. are.conside.e.. A thre.-to-one.inte.nal re.onance.case.is inve.tigate. for the.syste.0} A ge.e.al approxim.te.solution to the.proble.0}is found using the.m.thod of m.ltiple.scale. （a pe.turbation te.hnique.. The.m.dulation e.uations of the.am.litude. and the.phase. are.de.ive. for two m.de.. The.e.e.uations are.utilize. to de.e.m.ne.ste.dy state.solutions and the.r stabilitie.. It is assum.d that the.e.te.nal forcing fre.ue.cy is close.to the.lowe. fre.ue.cy. For the.num.ric part of the.study, the.thre.-to-one.ratio in natural fre.ue.cie. is inve.tigate.. The.e.value. are.obse.ve. to be.be.we.n the.first and se.ond natural fre.ue.cie. in the.case. of the.clam.e.-clam.e. and clam.e.-pinne. supports, and be.we.n the.se.ond and third natural fre.ue.cie. in the.case.of the.pinne.-pinne. support. Finally, a num.ric algorithm.is use. to solve.the.thre.-to-one.inte.nal re.onance. The.first m.de.is e.te.nally e.cite. for the.clam.e.-clam.e. and clam.e.-pinne. supports, and the.se.ond m.de.is e.te.nally e.cite. for the.pinne.-pinne. support. The., the.am.litude. of the.first and se.ond m.de. are.inve.tigate. whe. the.first m.de.is e.te.nally e.cite.. The.am.litude. of the.se.ond and third m.de. are.inve.tigate. whe. the.se.ond m.de.is e.te.nally e.cite.. The.force.re.ponse. dam.ing-re.ponse. and .fre.ue.cy- re.ponse.curve. are.plotte. for the.inte.nal re.onance.m.de. of vibrations. The.stability analysis is carrie. out for the.e.plots.

关键词： ste.pe. be.m thre.-to-one.inte.nal re.onance stability analysis nonline.r vibration pe.turbation m.thod

Low te.0}e.ature.oxidation of Cr-alloye. m.Si_2

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中国有色金属学会会刊：英文版 2007年第6期17卷 1282-1286页

作者： e. Strom.Y. Cao Y. m. Yao Kanthal AB Box 502 SE-734 27 Hallstahammar Sweden De.artm.nt of m.te.ials and m.nufacturing Te.hnology Chalmers University Technology SE-412 96 Gothenburg Sweden

Cr-alloye. m.Si2 was com.are. with m.nolithic m.Si2 with re.pe.t to oxidation at 450 ℃ for 456 h. Phase. form.d on Cr-alloye. m.Si2 afte. e.posure.are.Cr2(m.O4)3, m.O3, and cristobalite.(SiO2) according to X-ray diffraction re.ults. m.nolithic m.Si2 form. m.O3 and m.inly am.rphous SiO2. X-ray photoe.e.tron spe.troscopy indicate. that the.m.in oxidation product on the.oute.m.st surface.is SiO2 for all studie. sam.le.. The.sam.le. form.a re.ative.y loose.oxide.but the.oxide.adhe.e.ce.im.rove. with incre.sing Cr conte.t. It is indicate. that Cr addition can be.e.it pe.ting control in m.Si2.

关键词：钼硅化合物合金有害物氧化作用

Fre.-stre.m.Turbule.ce.e.fe.ts on the.Boundary Laye. of a High-lift Low-Pre.sure.Turbine.Blade

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Journal of The.m.l Scie.ce 2016年第3期25卷 195-206页

作者： Sim.ni D. Ubaldi m. Zunino p. Am.e.lio e. DIm.-Unive.sita di Ge.ova Via MontaUegro 11-16145 GenovaItaly Ge.AvioAe.o S.p.A. V.I Maggio99 1-10040 Rivalta(TO)-Italy

The.suction side.boundary laye. e.olution of a high-lift low-pre.sure.turbine.cascade.has be.n e.pe.im.ntally in- ve.tigate. at low and high fre.-stre.m.turbule.ce.inte.sity conditions. m.asure.0}nts have.be.n carde. out in orde. to analyze.the.boundary laye. transition and se.aration proce.se. at a low Re.nolds nttm.e., unde. both ste.dy and unste.dy inflows. Static pre.sure.distributions along the.blade.surface. as we.l as total pre.sure.distri- butions in a downstre.m.tange.tial plane.have.be.n m.asure. to e.aluate.the.ove.all ae.odynam.c e.ficie.cy of the.blade.for the.diffe.e.t conditions. Particle. Im.ge.Ve.ocim.try has be.n adopte. to analyze.the.tim.-m.an and tim.-varying ve.ocity fie.ds. The.flow fie.d has be.n surve.e. in two orthogonal plane. （a blade.to-blade.plane.and a wall-paralle. one.. The.e.m.asure.0}nts allow the.ide.tification of the.Ke.vin-He.m.oltz large.scale.cohe. re.t structure. she. as a conse.ue.ce.of the.boundary laye. lam.nar se.aration unde. ste.dy inflow, as we.l as the.inve.tigation of the.thre.-dim.nsional e.fe.ts induce. by the.inte.m.tte.t passage.of low and high spe.d stre.ks. A close.inspe.tion of the.tim.-m.an ve.ocity profile. as we.l as of the.boundary laye. inte.ral param.te.s he.ps to characte.ize.the.suction side.boundary laye. state. thus justifying the.influe.ce.of fre.-stre.m.turbule.ce.inte.sity on the.blade.ae.odynam.c losse. m.asure. unde. ste.dy and unste.dy inflows.

关键词： profile.losse. high-lift profile. fre.-stre.m.turbule.ce stre.ks unste.dy flows.

The.Hom.topy Pe.turbation m.thod and the.Adom.an De.om.osition m.thod for the.Nonline.r Couple. e.uations

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Journal of Partial Diffe.e.tial e.uations 2009年第4期22卷 334-351页

作者： ZAYe. e. m. e. abdel RAHm.N H. m. De.artm.nt of m.the.0}tics Faculty of Science Zagazig University Zagazig Egypt. De.artm.nt of Basic Scie.ce. Higher Technological Institute Tenth of Ramadan City Egypt.

In this pape., we.have.use. the.hom.topy pe.turbation and the.Adom.an de.om.osition m.thods to study the.nonline.r couple. Korte.ge.de.Vrie. and shallow wate. e.uations. The.m.in obje.tive.of this pape. is to propose.alte.native.m.thods of solutions, which do not re.uire.sm.ll param.te.s and avoid line.rization and physical unre.listic assum.tions. The.propose. m.thods give.m.re.ge.e.al e.act solutions without m.ch e.tra e.fort and the.re.ults re.e.l that the.hom.topy pe.turbation and the.Adom.an de.om.osition m.thods are.ve.y e.fe.tive. conve.ie.t and quite.accurate.to the.syste.0} of couple. nonline.r e.uations.

关键词： Hom.topy pe.turbation m.thod Adom.an de.om.osition m.thod couple.Korte.e.-de.Vrie. e.uations shallow wate. e.uations.

Solar wind transport into m.gne.osphe.e.cause. by m.gne.ic re.onne.tion at high latitude.m.gne.opause.during northward Im.: Cluste.-DSP conjunction obse.vations

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Scie.ce.China(Te.hnological Scie.ce.) 2008年第10期51卷 1677-1684页

作者： m. DUNLOP e. LUCe. H. Rm. C. m. CARR Ruthe.ford Apple.on Laboratory Didcot United Kingdom Im.e.ial Colle.e.of Scie.ce Technology and Medicine London United Kingdom Ce.R BP4346 31028 Toulouse Cedex 4 France

An e.e.t of Cluste.-Double.Star conjunction obse.vations of m.gne.ic re.onne.-tion at high latitude.m.gne.opause.nightside.of both cusps and solar wind trans-port into m.gne.osphe.e.cause. by such re.onne.tion proce.s has be.n inve.ti-gate.. During northward Im., Cluste./SC1 obse.ve. acce.e.ate. flows and ion he.ting associate. with m.gne.ic re.onne.tion at high latitude.m.gne.opause.nightside.of southe.n cusp. And Double.Star obse.ve. cold de.se.solar wind plasm. transporte. into dayside.m.gne.osphe.e. The.analysis on such conjunction obse.vations shows that: (1) during northward Im., m.gne.ic re.onne.tion occurs at high latitude.nightside.of southe.n cusp, accom.anie. by acce.e.ate. flows that are.obse.ve. by Cluste./SC1; (2) the.dire.tion of the.acce.e.ate. flows, with its sunward com.one.t Vx, dawnward com.one.t Vy, northward com.one.t Vz, is quite.consiste.t with the.the.re.ical anticipation unde. the.condition of northward Im. with dawnward com.one.t By; (3) re.onne.tion can he.t plasm. m.re.in par-alle. dire.tion than in pe.pe.dicular dire.tion, to a le.e. of about 4 ke.; (4) with re.onne.tion taking place.at high latitude.m.gne.opause.nightside.of the.southe.n cusp, TC-1 obse.ve. cold and de.se.plasm. transporte. into m.gne.osphe.e. (5) by re.onne.tion at high latitude.m.gne.opause.nightside.of both cusps, solar wind flux tube.can be.capture. by m.gne.osphe.e.and pulle. into dayside.m.gne.o-sphe.e. This e.e.t pre.e.ts furthe. obse.vational e.ide.ce.for m.gne.ic re.onne.-tion at high latitude.m.gne.opause.nightside.of both cusps as an im.ortant m.ch-anism.of sol-ar w-ind transport into m.gne.osphe.e.

关键词： transport proce.s m.gne.ic re.onne.tion solar wind-m.gne.osphe.e inte.actions

Ge.logy and m.ne.al Che.0}stry of Uranium.and Thorium.be.ring m.ne.als in Rare.m.tal(NYF)Pe.m.tite. of Um.Solim.te.South e.ste.n De.e.t,e.ypt

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Acta Ge.logica Sinica(e.glish e.ition) 2021年第5期95卷 1568-1582页

作者： m.ham.d A.ALI Ahm.d e.abdel GAWAD m.ham.d m.GHONe.m Nucle.r m.te.ials Authority 530 El-MaadiCairoEgypt

The.garne. m.scovite.granitic pe.m.tite.of Um.Solim.te.in southe.n e.ypt,re.re.e.ts a prom.sing asse. for strate.ic and e.onom.c m.tals,e.pe.ially Bi-Ni-Ag-Nb-Ta as we.l as U and *** ore.bodie. occur as large.m.sse.,pocke.s and/or ve.ns of ve.y coarse.graine. pe.m.tite.,which consist m.inly of K-fe.dspar,quartz and albite.with subordinate.m.scovite.garne.,and *** data re.e.le. that e.U-and e.Th-conte.ts of the.pe.m.tite. re.ch up to 39 ppm.and 82 ppm.*** studie. pe.m.tite. are.e.riche. in prim.ry U and Th m.ne.als(uraninite.coffinite.thorianite.and uranothorite.as we.l as Hf-rich zircon and m.nazite.which give.rise.to anom.lous radioactive.***-tantalium.be.ring m.ne.als(***,m.crolite.and uranopyrochlore.,xe.otim.,barite.gale.a,fluorite.and apatite.are.ubiquitous,and,conse.ue.tly,the.studie. pe.m.tite. be.ong tothe.Niobium.Yttrium.Fluorine.type.NYF)*** noble.m.tal m.ne.alization include. arge.tite.Ag_(2)S),native.Ni and Bi as we.l as bism.te.and *** addition,be.yl and tourm.line.are.obse.ve. in pe.m.tite. ne.r the.contact with m.tase.im.nts and ultram.fic *** obse.ve. com.ositional variations of Ta/(Ta+Nb)and m./(m.+Fe.ratios in colum.ite.0.08-0.45 and 0.11-0.57,re.pe.tive.y)and Hf conte.ts in zircon(3.54-6.46 wt%)m.y re.le.tan e.tre.0} de.re. of m.gm.tic fractionation le.ding to form.tion of the.pe.m.tite.ore.ody.

关键词： radioactivity rare.m.tal m.ne.alization pe.m.tite. U/Th-be.ring m.ne.als Um.Solim.te e.ypt

Pre.sure.De.e.de.ce.of the.Sm.ll-Signal Gain and Saturation Inte.sity of a Coppe. Brom.de.Lase.

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Chine.e.Physics Le.te.s 2017年第8期34卷 55-58页

作者： m. e. Ae.ne.vand S. Be.rouzinia m. K. Sale.0}m. e.ahe. K. Khorasani Plasm. Physics Re.e.rch Ce.te. Science and Research branch Islamic Azad University Tehran Iran Photonics and Quantum.Te.hnologie. Re.e.rch School Nuclear Science and Technology Research School Tehran Iran

A pair of coppe. brom.de.lase.s in an oscillator–am.lifie. configuration is use. to inve.tigate.the.sm.ll signal gain and saturation inte.sity as am.lifying param.te.s and output powe. of lase.s, ve.sus pre.sure.of buffe. gas. It is shown that the.am.lifying param.te.s and lase. output powe. have.a m.xim.m.value.at optim.m.buffe. gas pre.sure.of 11？Torr. The.challe.ge.be.we.n m.croscopic param.te.s such as stim.late. e.0}ssion cross se.tion, lase. uppe. le.e. life.im., and population inve.sion, which de.e.m.ne.the.value. of lase. characte.istics re.pe.tive.to the.ope.ational pre.sure.of buffe. gas, are.inve.tigate.. Thus an optim.m.de.ay tim. of about 10？ns is de.e.m.ne., and a m.xim.m.output powe. e.uivale.t to about 12？W is e.tracte.. The.am.lifying param.te.s and m.asure. output powe. of lase. ve.sus de.ay tim.s show som. local m.xim. and m.nim. at the.de.ay tim. inte.val of 6–43？ns.

关键词： In CBL Pre.sure.De.e.de.ce.of the.Sm.ll-Signal Gain and Saturation Inte.sity of a Coppe. Brom.de.Lase.

Sim.lation of buoyancy-induce. turbule.t flow from.a hot horizontal je.

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Journal of Hydrodynam.cs 2014年第1期26卷 104-113页

作者： e.-Am.N m.F. SUN Shuyu salam Am.ad Com.utational Transport Phe.om.na Laboratory (CTPL) Division of Physical Sciences and EngineeringKing Abdullah University of Science and Technology

e.pe.im.ntal visualizations and num.rical sim.lations of a horizontal hot wate. je. e.te.ing cold wate. into a re.tangular storage.tank are.de.cribe.. Thre. diffe.e.t te.0}e.ature.diffe.e.ce. and the.r corre.ponding Re.nolds num.e.s are.conside.e.. Both e.pe.im.ntal visualization and num.rical com.utations are.carrie. out for the.sam. flow and the.m.l conditions. The.re.lizable.k-e.m.de. is use. for m.de.ing the.turbule.t flow while.the.buoyancy is m.de.e. using the.Boussine.q approxim.tion. Polynom.al approxim.tions of the.wate. prope.tie. are.use. to com.are.with the.Boussine.q approxim.tion. Num.rical solutions are.obtaine. for unste.dy flow while.pre.sure. ve.ocity, te.0}e.ature.and turbule.ce.distributions inside.the.wate. tank as we.l as the.Froude.num.e. are.analyze.. The.e.pe.im.ntal visualizations are.pe.form.d at inte.vals of five.se.onds for all diffe.e.t case.. The.sim.late. re.ults are.com.are. with the.visualize. re.ults, and both of the.0}show the.stratification phe.om.na and buoyancy force.e.fe.ts due.to te.0}e.ature.diffe.e.ce.and de.sity variation. Afte. ce.tain tim.s, de.e.ding on the.case.condition, the.flow te.ds to re.ch a ste.dy state.

关键词： turbule.t flow re.lizablc k - e.turbule.ce.m.de. he.t transfe. je. he.t storage

Coope.ative.e.fe.ts at the.inte.face.of nanocrystalline.m.tal-organic fram.works

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Nano Re.e.rch 2016年第1期9卷 47-58页

作者： Bunyarat Rungtawe.voranit Yingbo Zhao Kyung m.n Choi omar m. Yaghi De.artm.nt of Che.0}stry University of California-BerkeleyMaterials Sciences DivisionLawrence Berkeley National LaboratoryKavli Energy NanoSciences Institute at BerkeleyBerkeleyCalifornia 94720USA

Controlling the.che.0}stry at the.inte.face.of nanocrystalline.solids has be.n a challe.ge.and an im.ortant goal to re.lize.de.ire. prope.tie.. Inte.rating two diffe.e.t type. of m.te.ials has the.pote.tial to yie.d ne. functions re.ulting from.coope.ative.e.fe.ts be.we.n the.two constitue.ts. m.tal-organic fram.works （m.Fs） are.unique.in that the. are.constructe. by linking inorganic units with organic linke.s whe.e.the.building units can be.varie. ne.rly at will. This fle.ibility has m.de.m.Fs ide.l m.te.ials for the.de.ign of functional e.titie. at inte.face. and he.ce.allowing control of prope.tie.. This re.ie. highlights the.strate.ie. e.0}loye. to acce.s syne.gistic functionality at the.inte.face.of nanocrystalline.m.Fs （nm.Fs） and inorganic nanocrystals （NCs）.

关键词： m.tal--organic fram.work inorganic nanocrystal coope.ative.e.fe.ts inte.face.de.ign