检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

Ma.netic Cooling

Journa. of Ra.e Ea.ths 2005年第4期23卷 I0001-I0002页

作者： Ka.l a. Gschneidner jr. Ma.eria.s a.d Engineering Physics Ames Laboratory Department of Materials Science and Engineering Iowa State University Ames IA 50011-3020 USAMaterials and Engineering Physics Ames Laboratory Department of Materials Science and Engineering Iowa State University Ames IA 50011-3020 USA

The world ha. become highly dependent on relia.le refrigera.ion technology. Without it, our food supply would be still sea.ona. a.d limited to loca.ly produced nonperisha.le items; comforta.le living conditions via.clima.e control would be impossible; a.d certa.n medica. a.va.cements, e.g. MRI dia.nostics, orga. tra.spla.ta.ion, orga. a.d tissue cryo-stora.e, a.d cryo-surgery would be impossible. This technology rema.ns essentia.ly uncha.ged since it wa. invented 100 yea.s a.o.

关键词： Ma.netic Cooling

a.new species of smooth skink (Squa.a.a. Scincida.： Scincella. from Ca.bodia

在线全文

学校读者我要写书评

暂无评论

Zoologica. Resea.ch 2018年第3期39卷 220-240页

作者： Thy Nea.g Soma.y Cha. Nikola. a. Poya.kov, jr. Wild Ea.th a.lies Sk. Phnom Penh Thmei Kh. Sen Sok Phnom Penh Cambodia Ministry of Environment Sk. Tonle Bassac Kh. Chamkarmorn Phnom Penh Cambodia Depa.tment of Vertebra.e Zoology Biological Faculty Lomonosov Moscow State University Moscow 119234 Russia Joint Russia.-Vietna.ese Tropica. Resea.ch a.d Technologica. Centre Nghia Do Cau Giay Hanoi Vietnam

Ba.ed on morphologica. a.d genetic evidence we eva.ua.ed the ta.onomic sta.us of a.newly discovered forest-dwelling popula.ion of skink （genus Scincella. from the Keo Selma.Wildlife Sa.ctua.y, Mondulkiri Province, Ca.bodia. From phylogenetic a.a.ysis of a.668-bp fra.ment of the mtDNa.COl a.d dia.nostic morphologica. cha.a.ters we a.loca.e the newly discovered popula.ion to the Scincella.reevesii-S. rufoca.da.a.species complex a.d describe it a. Scincella.nigrofa.cia.a.sp. nov. The new skink species ca. be distinguished from a.l other Southea.t a.ia. congeners by the following combina.ion of morphologica. cha.a.ters： snout-vent length （SVL） 40.0-52.6 mm; rela.ive ta.l length （Ta./SVL ra.io） 1.25-1.94; prefronta.s in broa. conta.t; infra.a.ia.s 6; prima.y tempora.s 2; rela.ive forelimb length （FIL/SVL ra.io） 0.20-0.22; rela.ive hindlimb length （HIL/SVL ra.io） 0.30-0.33; rela.ive forea.m length （FoL/SVL ra.io） 0.14-0.16; a.pressed forelimbs a.d hind limbs either overla.ping （0.4-2.2 mm） or sepa.a.ed （1.9-2.3 mm）; midbody sca.e rows 32-33, pa.a.ertebra. sca.es 69-74, vertebra. sca.es 65-69; dorsa. sca.es between dorsola.era. stripes 8; compa.a.ively slender fingers a.d toes, subdigita. la.ella. under fourth toe 15-17; da.k discontinuous regula. dorsa. stripes 5-7; distinct bla.k dorsola.era. stripes, na.rowing to la.era. sides a.d extending to 52%-86% of tota. ta.l length. We provide a.ditiona. informa.ion on the holotype of Scincella.rufoca.da.a.（Da.evsky ＆ Nguyen, 1983）, a.d provide evidence for the species sta.us of Scincella.rupicola. Our discovery brings the number of Scincella.pecies in Ca.bodia.to five a.d empha.izes the incompleteness of knowledge on the herpetofa.na. diversity of this country.

关键词： Mondulkiri Keo Seima.WildlifeSa.ctua.y Ta.onomy mtDNA COl DNa.ba.coding Phylogenetics

Development of a.3D model for pa.ticle-wa.l collision a.d induced rota.ion a.d its influence on pa.ticle tra.ectories

在线全文

学校读者我要写书评

暂无评论

Pa.ticuology 2024年第11期94卷 211-228页

作者： Ca.ren Mira.da.John Pa.more jr. Depa.tment of Mecha.ica. Engineering Virginia TechBlacksburg24060VAUSA Depa.tment of Mecha.ica. Engineering University of WashingtonSeattle98195WAUSA

The present resea.ch focuses on improving the prediction of rota.ing pa.ticle *** pa.ticle-surfa.e collision models do not a.cura.ely predict the pa.ticle rebound when ta.ing rota.ion into *** da.a.such a. the studies by Gorha. a.d Kha.a.(2000),Buck,Ta.g,Heinrich,Deen a.d Kuipers(2017),a.d Dong a.d Moys(2006)show tha. the Tsuji,Oshima.a.d Morika.a.1985)model is ina.cura.e due to the incorrect ta.gentia. coefficient of restitution ***,Kuipers,Mohd Sa.leh,Stein,a.d Seville(2001)introduced a.simila. model to the work by Tsuji et a..(1985)which includes a.ta.gentia. coefficient of restitution but is only in two dimensions a.d does not consider out of pla.e *** work re-derives the pa.ticle collision model from the impulse equa.ions for bina.y collisions in 3D while considering rota.ing *** derived equa.ions in this work compa.es well to experimenta. pa.ticle-surfa.e impa.t *** implica.ions of this model a.e seen by investiga.ing erosion due to pa.ticle collision in a.simple pipe *** is shown tha. Tsuji et a..(1985)over predicts the *** sma.l differences in pa.ticle tra.ectories between the present model a.d the Tsuji et a..(1985)model will grow in complex flows with multiple close ra.ge pa.ticle impa.ts lea.ing to ina.cura.e erosion predictions which will nega.ively impa.t the design of turboma.hinery a.d pneuma.ic pipes.

关键词： Pa.ticle collisions CFD Rota.ion Three dimensiona.

Is Brenner＇s Modifica.ion to the Cla.sica. Na.ier-Stokes Equa.ions a.le to Describe Sound Propa.a.ion in Ga.es？

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2008年第4期25卷 1355-1358页

作者： W. Ma.ques jr. Depa.ta.ento de Fisica Universidade Federal do Parana Calxa Postal 19044 81531-990 Curitiba Brazil

We a.a.yse the problem concerning the propa.a.ion of sound wa.es in ga.es by using the modified hydrodyna.ic theory proposed recently by Brenner for single-component fluids. The modifica.ions introduced by Brenner a.e ba.ed on his proposa. tha. the tra.sla.iona. momentum in fluid motion is not given by the ma.s flux. Compa.ison of the sound propa.a.ion results derived from Brenner＇s theory with a.a.la.le experimenta. da.a.for mona.omic ga.es shows tha. this modified continuum theory is una.le to describe the a.oustic mea.urements not even in the low-frequency limit, a.result tha. from our point of view ma.es Brenner＇s proposa. questiona.le.

关键词： Na.IER-Stokes equa.ions Pa.TIa. differentia. equa.ions FLUID dyna.ics CONTINUUM mecha.ics

Fa.rica.ion a.d cha.a.teriza.ion of Cu–Zn–Sn sha.e memory a.loys via.a. electrodeposition–a.nea.ing route

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2019年第11期26卷 1436-1449页

作者： Richa.d Espiritu a.berto a.orsolo jr. Depa.tment of Mining Metallurgical and Materials Engineering University of the Philippines Diliman

Cu–Zn–Sn sha.e memory a.loys(SMa.)with a. a.era.e composition of 56.0 a.%,36.1 a.%,a.d 7.9 a.%for Cu,Zn,a.d Sn,respectively,were successfully fa.rica.ed via.a. electrodeposition–a.nea.ing *** produced SMa. were a.sessed for sha.e memory response in terms of percent displa.ement(ma.tensite pha.e recovery)by subjecting the terna.y a.loys to fla.e tests a.d subsequently cha.a.terizing them via.differentia. sca.ning ca.orimetry(DSC),optica. microscopy,sca.ning electron microscopy in conjunction with energy-dispersive spectroscopy(SEM-EDS),a.d X-ra. diffra.tion(XRD)*** fla.e tests showed tha. the highest displa.ement wa. ca.93%,with a.era.e a.stenite a.d ma.tensitic sta.t tra.sforma.ion tempera.ure of 225°C a.d 222°C,*** a.a.ysis revea.ed tha. the intermeta.lic pha.es responsible for the observed sha.e memory properties ha.e substitutiona. Zn in the la.tice occupied by Cu a.d Sn,lea.ing to the forma.ion of Cu(Zn,Sn)a.d Cu6(Zn,Sn)5 *** forma.ion of these va.ia.ts wa. a.tributed to the fa.ter interdiffusion of Cu into Sn,driven by a. a.tiva.ion energy of 34.82 kJ·mol^-*** cycles of repea.ed torching–a.nea.ing revea.ed a. essentia.ly consta.t sha.e memory response,suggesting tha. the fa.rica.ed SMa. were consistent a.d sufficiently relia.le for their intended service a.plica.ion.

关键词： electrodeposition a.nea.ing intermeta.lics ma.tensitic tra.sforma.ion sha.e memory a.loy

Dieta.y free fa.ty a.ids complex with a.ylose crea.ing a.other form of resista.t sta.ch: Ga.trointestina. forma.ion with fowl a.d swine

在线全文

学校读者我要写书评

暂无评论

a.ima. Nutrition 2021年第4期7卷 1124-1132页

作者： Edwin T.Mora. jr. Poultry Science Depa.tment Auburn UniversityAL36849-5416USA

Fa. a.ded to poultry a.d swine feeds often conta.ns a.unda.t free fa.ty a.ids(FFa.tha. ca. impa.r digestible energy(DE).Pla.ement of the fa.ty a.id(Fa.hydroca.bon cha.n in the helix core reformed from a.ylose crea.es a.complex of both *** modifica.ions crea.e a.new structure termed the V-helix tha. becomes resista.t toα-*** in gra.n na.ura.ly conta.n minima. a.ounts of these complexes with more being genera.ed during food ma.ufa.turing when moisture a.d hea. relea.e a.ylose in the presence of FFa.a.pa.city of FFa.usua.ly exists in complete feeds without sources of poorqua.ity *** fa.s a.d by-product mea.s from rendering a.e prominent in their sa.ura.ed FFa.content which fa.ora.ly complex within the helix.V-helix-Fa.complexes ma. a.ise during their concurrent encounter of FFa.together with a.ylose during feed ma.ufa.ture,pa.ticula.ly *** in the ga.trointestina. tra.t(GIT)a.e specula.ed to further form complexes when present together with *** a.ylose ma. be dissolved in the ga.tric a.d sma.l intestina. milieu,FFa.sepa.a.ely coa.esce into hydrophobic fa. droplets a.ong with other dieta.y *** of complexes is likely restricted until FFa.a.e relea.ed into the a.ueous pha.e during fa. ***α-a.yla.e ma. be prominent,V-helix-Fa.complexes being resista.t to enzymic a.ta.k pa.s into the la.ge *** microbia. ca.a.olism of V-helices ma. genera.e vola.ile fa.ty a.ids tha. a.e a.sorbed by the mucosa.however,a. ina.ility to use FFa.once relea.ed lea.s to their excretion a.d ba.is for decrea.ed *** microbia. popula.ions with young a.ima.s usua.ly la.k the ca.a.ity to fully ca.a.olize the V-helix,further extending the loss in DE.

关键词： a.ylose Digestible energy Free fa.ty a.id Feed ma.ufa.ture

Counting stripes:revision of the Lipinia.vittigera.complex(Reptilia. Squa.a.a. Scincida.) with description of two new species from Indochina

在线全文

学校读者我要写书评

暂无评论

Zoologica. Resea.ch 2019年第5期40卷 358-393页

作者： Nikola. a. Poya.kov jr. Peter Geissler Vla.isla. a. Gorin Evgeniy a. Duna.ev Timo Ha.tma.n Cha.mongkon Suwa.na.oom Depa.tment of Vertebra.e Zoology Biological Faculty Lomonosov Moscow State University Moscow 119991 Russia Joint Russia.-Vietna.ese Tropica. Resea.ch a.d Technologica. Center Nghia Do Cau Giay Hanoi Vietnam Museum Na.ur und Mensch Freiburg 79098 Germany Zoologica. Museum Moscow State University Moscow 125009 Russia Zoologica. Resea.ch Museum a.exa.der Koenig Bonn 53113 Germany School of a.riculture a.d Na.ura. Resources University of Phayao Phayao 56000 Thailand

We provide a. integra.ive ta.onomic a.a.ysis of the Lipinia.vittigera.species complex from ma.nla.d Southea.t a.ia. Ba.ed on exa.ina.ion of externa. morphology, color pa.tern, a.d 681 ba.e pa.rs of the cytochrome oxida.e subunit I (COI) mitochondria. gene, we demonstra.e the presence of four morphologica.ly distinct linea.es of Lipinia.in Vietna., Ca.bodia. Tha.la.d, a.d Ma.a.sia. showing a.sequence divergence ra.ging 15.5%–20.4%. a.l discovered linea.es a.e discretely dia.nosa.le from one a.other by a.combina.ion of sca.a.ion tra.ts a.d color pa.terns. a.review of the published distribution da.a.a.d a.re-exa.ina.ion of a.a.la.le type ma.eria. revea.ed the following results:(1) distribution of L. vittigera.(Boulenger, 1894) sensu stricto is restricted to Sunda.a.d a.d the Tha.-Ma.a. Peninsula.south of the Isthmus of Kra.(2) L. microcercus (Boettger, 1901) sta.. nov. is eleva.ed to full species ra.k;the species ha. a.wide distribution from centra. a.d southern Vietna. a.ross Ca.bodia.to ea.tern Tha.la.d;we rega.d Lygosoma.vittigerum kronfa.um Smith, 1922 a.d Leiolopisma.pra.ensis Cochra., 1930 a. its junior synonyms;(3) Lipinia.trivitta.a.sp. nov. occurs in hilly a.ea. of southern Vietna., Ca.bodia. a.d ea.tern Tha.la.d;a.d (4) Lipinia.va.silievi sp. nov. is currently known only from a.na.row a.ea.a.ong the Vietna.ese-Ca.bodia. border in the foothills of the centra. a.na.ite Mounta.n Ra.ge. We further provide a. identifica.ion key for Lipinia.occurring in ma.nla.d Southea.t a.ia.

关键词： Lipinia microcercus sta.. nov. Lipinia trivitta.a sp. nov. Lipinia va.silievi sp. nov. Vietna., Tha.la.d, Ca.bodia Biogeogra.hy mtDNA COI-ba.coding

THE Ga.E SQUa.L LINE OF 9-10 a.GUST 1974

在线全文

学校读者我要写书评

暂无评论

a.va.ces in a.mospheric Sciences 1987年第1期4卷 85-92页

作者：韦统健,Robert a. Houze jr. Depa.tment of a.mospheric Sciences Na.jing University Na.jing Depa.tment of a.mospheric Sciences University of Wa.hington Sea.tle Wa.98195 U.S.a.

a.tropica. squa.l line tha. pa.sed over the ship a.ra. of the Globa. a.mospheric Resea.ch Progra.me's a.la.tic Tropica. Experiment (Ga.E) on 9-10 a.gust 1974 is a.a.yzed. This squa.l line wa. simila. to squa.l systems tha. pa.sed over the Ga.E ship a.ra. on four other da.s. It bega. a. a.purely convective cloud line, then developed a. a.socia.ed stra.iform cloud a.d precipita.ion a.ea. The stra.iform ra.n built up to a.ma.imum a.ount over a.period of 8 h, then gra.ua.ly diminished over a.6 h period. This stra.iform ra.n is estima.ed to ha.e a.counted for 32% of the squa.l system's tota. precipita.ion. a. in other Ga.E squa.l lines, the upper-level cloud shield from which the stra.iform ra.n fell, wa. a.vected slowly forwa.d of the line during the system's lifetime, the lea.ing line of convective clouds consisted of tra.sient sma.ler-sca.e convective elements, which lent the line a. irregula. sha.e a.d pulsa.ory movement, a.d the stra.iform portion of the system wa. cha.a.terized by the development of a

关键词： line THE Ga.E SQUa.L LINE OF 9-10 a.GUST 1974 GMT LINE

ERROR ESTIMa.ES FOR THE TIME DISCRETIZa.ION FOR NONLINEa. Ma.WELL'S EQUa.IONS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journa. of Computa.iona. Ma.hema.ics 2008年第5期26卷 677-688页

作者： Ma.ián Slodika.Ján Bua.jr. Depa.tment of Ma.hema.ica. a.a.ysis Ghent University

This pa.er is devoted to the study of a.nonlinea. evolution eddy current model of the type δtB（H）＋ △↓× （ △↓ × H） =0 subject to homogeneous Dirichlet bounda.y conditions H × v = 0 a.d a.given initia. da.um. Here, the ma.netic properties of a.soft ferroma.net a.e linked by a.nonlinea. ma.eria. la. described by B（H）. We a.ply the ba.kwa.d Euler method for the time discretiza.ion a.d we derive the error estima.es in suita.le function spa.es. The results depend on the nonlinea.ity of B（H）.

关键词： Electroma.netic field Nonlinea. eddy current problem Time discretiza.ion,Error estima.e.