简介：ＥＸＴＲＥＭＥＰＯＩＮＴＲＥＳＵＬＴＳＦＯＲＳＴＲＩＣＴＰＯＳＩＴＩＶＥＲＥＡＬＮＥＳＳＯＦＴＲＡＮＳＦＥＲＦＵＮＣＴＩＯＮＦＡＭＩＬＩＥＳＷＡＮＧＬｏｎｇ；ＨＵＡＮＧＬｉｎ（ＤｏｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃｓ，ＰｅｋｉｎｇＵｎｉｖｅｒｓｉｔ...

简介：Coupledtransferofsoilwaterandheatinclosedcolumnsofhomogeneousredsoilwasstudiedunderlaboratoryconditions.Acoupledmodelwasconstructedusingsoilphysicaltheory,empiricalequationsandexperimentaldatatopredictthecoupledtransfer.Theresultsshowthattransportofsoilwaterwasaffectedbytemperaaturegradient,andthelargestnetwatertransportwasfoundinthesoilcolumnwithinitialwatercontentof0.148m^3m^-3,Atthesametime,temperaturechangeswiththetransportofsoilwaterwasinanonlinearshapeasheatparameterswrefunctionofwatercontent,andthechangesoftemperaturewerepositivelycorrelatedwiththenetamountofwatertransported.Numericalmodellingresultsshowthatthepredictedvaluesoftemperaturedistributionwereclosetotheobservedvalues,whilethepredictedvaluesofwatercontentexhibitedlimiteddeviationatbothendsofthesoilcolumnduetotheslighttemperaturechangesatbothends.ItWASindicatedthatthemodelproposedherewasapplicable.

简介：Weinvestigatetheentanglementtransferinafour-qubitsystemandcalculatetheconcurrencebetweenanytwoqubitsindifferentinitialstates.Weshowthatboththepureentangledstateandmixedentangledstatecanbetransferred.Forsomespecialcouplingconstantsandsomeevolutiontime,entanglementcanbecompletelytransferredfromonepairparticlestoanother.

简介：Smallconcentrationsofahigh-molecular-weightpolymerhavebeenusedtocreateso-called'elasticturbulence'inamicro-scaleserpentinechannelgeometry.Itisknownthattheinteractionoflargeelasticstressescreatedbytheshearingmotionwithinthefluidflowwithstreamlinecurvatureoftheserpentinegeometryleadsinitiallytoapurely-elasticinstabilityandthenthegenerationofelasticturbulence.Weshowthatthiselasticturbulenceenhancestheheattransferatthemicro-scaleinthisgeometrybyupto300%undercreepingflowconditionsincomparisontothatachievedbytheequivalentNewtonianfluidflow.

简介：治疗学的克隆，胚胎的干细胞(转换字符)由此从原子转移(NT)被导出胚胎，可以在再生药的新时代起一个主要作用。Inthis学习我们建立了四十原子转移--从不同施主房间类型或段落的NTembryos被导出的转换字符(NT转换字符)线。我们发现NT转换字符能够形成胚胎植物或动物身体。另外，NT转换字符表示了pluripotency干细胞标记试管内并且能区分进胚胎的纸巾体内。从施主房间能形成完整的术语的早经过R1的NT胚胎开发了小狗，而那些为为实时出生是必要的reprogramming从迟了的经过R1ES施主房间失去了潜力。我们随后建立了近来从NT胚囊被开发的sequentialNT-R1-ESC线经过R1转换字符施主。然而，当在他们的早段落用作原子转移施主时，这些NT-R1-ESC排队，没能导致实时小狗。这显示用顺序的NT转换字符的治疗学的克隆过程不能救居住在以前的施主代的发展缺乏。

简介：Boilingheattransferprocessisanalyzedinamoderatenarrowspaceconsistedoftwohorizontalplates,Themaindifferencebetweenthisprocessandtheconventionalunconfinedpoolboilingistheliquidsupplymechanismwhichisabsolutelypreventedbythegrowthofcoalescencebubblealongwiththeheatedsurfaceinthenarrowspace.Asaresult,themacrolayerbecomesthinnerduetotheevaporationoftheindividualbubbleswithinthemacrolayerduringtheperiodofbubblecoalescence,withorwithoutdryoutthatdependsonboththegapsizeofnarrowspaceandthesizeofheatedsurface.Foraspecifiedsizeoftheheatedsurface,theinitialthicknessoftheliquidlayerhasacriticalvaluewhichapproachesaconstantwhilethespaceheightislargerthanacriticalvalue.Theindividualbubblebehaviorsandtheheattransfercanbeconsideredasthesameasthatintheunconfinedpoolboiling,ifthespacegapislarge,However,theindividualbubblesdonotgenerateinthelastperiodofthebubblecoalescenceandalowermaximumheatfluxwillberesultedifthespacegapisreduced.Insuchacase,themacrolayerisdryout.

简介：Thisinvestigationdealswiththeeffectsofslip,magneticfield,andnonNewtonianflowparametersontheflowandheattransferofanincompressible,electricallyconductingfourth-gradefluidpastaninfiniteporousplate.Theheattransferanalysisiscarriedoutfortwoheatingprocesses.Thesystemofhighlynon-lineardifferentialequationsissolvedbytheshootingmethodwiththefourth-orderRunge-Kuttamethodformoderatevaluesoftheparameters.TheeffectiveBroydentechniqueisadoptedinordertoimprovetheinitialguessesandtosatisfytheboundaryconditionsatinfinity.Anexceptionalcross-overisobtainedinthevelocityprofileinthepresenceofslip.Thefourth-gradefluidparameterisfoundtoincreasethemomentumboundarylayerthickness,whereastheslipparametersubstantiallydecreasesit.Similarly,thenon-Newtonianfluidparametersandthesliphaveoppositeeffectsonthethermalboundarylayerthickness.

简介：TheeffectofSiO2particlesonheattransferperformanceofapulsatingheatpipe(PHP)wasinvestigatedexperimentally.DIwaterwasusedasthebasefluidandcontrastmediumforthePHP.Inordertostudyandmeasurethecharacter,thereareSiO2/H2Onanofluidswithdifferentconcentrationandapplyingwithvariousheatingpowersduringtheexperimentinvestigation.Accordingtotheexperimentalresult,thehighfractionofSiO2/H2OwilldeterioratetheperformanceofPHPcomparedwithDIwater,i.e.thethermalresistanceandthetemperatureofevaporationsectionincreases.ItisincontraryinthecaseoflowfractionofSiO2/H2O.Finally,thecomparisonofthethermalperformancesbetweenthenormaloperationsystemandthestaticsettlementsystemisgiven.ItisfoundthatboththethermalresistanceofnanofluidPHPandthetemperatureoftheevaporationsectionincreaseafterstandingforaperiod,anditisthesametrendforthetemperaturefluctuationattheidenticalheatingpowerforPHP.

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简介：AbstractPurpose:Osteochondral lesion of talus (OLT) is one of the common causes of ankle pain. This disorder is common in young athletes after ankle injury. There are various therapeutic options. One of the options is mosaic plasticizer. The purpose of this study was to investigate the effect of mosaicplasty on improvement of symptoms of patients with osteochondral lesions of talus.Methods:Nineteen patients with osteochondral lesions of talus participated in this study, who were treated with mosaicplasty. Before and after treatment, pain (visual analogue scale), function (American Orthopaedic Foot and Ankle Society), range of motion and radiographic signs were evaluated.Results:The results of this study showed that mosaicplasty could significantly reduce pain, increase function and improve radiographic symptoms. The range of motion increased after treatment, which was not significant.Conclusion:We can confirm the effect of mosaicplasty on the improvement of patients with osteochondral lesions of the ankle, suggesting it as a treatment option.

简介：MicroChannelheatsinkswithtwo-phaseflowcansatisfytheincreasingheatremovalrequirementsofmodernmicroelectronicdevices.Oneoftheimportantaspectsassociatedwithtwo-phaseflowsinmicrochannelsistostudythebubblebehavior.However,intheliteraturemostofthereportspresentdataofonlyasinglechannel.Thisdoesnotaccountforflowmixingandhydrodynamicinstabilitythatoccursinparallelmicrochannels,connectedbycommoninletandoutletcollectors.Inthepresentstudy,experimentswereperformedforair-waterandsteam-waterflowinparalleltriangularmicrochannelswithabaseof200-300μm.Theexperimentalstudyisbasedonsystematicmeasurementsoftemperatureandflowpatternbyinfraredradiometryandhigh-speeddigitalvideoimaging.Inair-waterflow,differentflowpatternswereobservedsimultaneouslyinthevariousmicrochannelsatafixedvaluesofwaterandgasflowrates.Insteam-waterflow,instabilityinuniformlyheatedmicrochannelswasobserved.

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简介：Onthebasisoffree-electronicbands,theFermienergyiscalculatedbysummingthebandeigenvaluesoverBrillouin-xones,andtheresultsmayleadtounderstandthephysicalbasisoftheaverage-bond-energymodelinthecalculationofvalence-bandoffsets.

简介：Freespanningpipelinesaresuspendedbetweentwopointsonanunevenseafloor.Thevariationsofstructuralconditions,suchasthechangesinsoilproperty,flowvelocity,axialforceandspanlengthetc.,directlyaffectworkingperformanceofthewholesubmarinepipelinesystem.Butuntilnowfewresearcheshavefocusedonconditionidentificationforfreespan(CIFS).Amethodtoidentifytheoperationalconditionsoffreespanningsubmarinepipelinesbasedonvibrationmeasurementsisproposedinthispaper.Firstly,theill-posednessofCIFSisanalyzedindetail.Secondly,theframeworkforCIFSbasedonthenonlinearkerneldiscriminantanalysis(KDA)isestablished.Thirdly,theinternalstructuralcharacteristicsofnaturalfrequencies,normalizedfrequenciesandfrequencychangeratiosarestudied.AndthentheconditionfeaturevectorforCIFSisextractedbyuseofthevibrationmeasurements.Finally,thevalidityoftheproposedapproachisevaluatedbyacasestudy.Theresultsdemonstratethattheproposedapproachcaneffectivelyidentifyeachconditionoffreespanwhenconditionvariationoccursevenifundermeasurementnoise.ItisconcludedthattheproposedmethodisapromisingtoolforCIFSinrealapplications.

简介：Wegivehereanoverviewoftheorbital-freedensityfunctionaltheorythatisusedformodelingatomsandmolecules.Wereviewtypicalapproximationstothekineticenergy,exchange-correlationcorrectionstothekineticandHartreeenergies,andconstructionsofthepseudopotentials.Wediscussnumericaldiscretizationsfortheorbital-freemethodsandincludeseveralnumericalresultsforillustrations.

简介：1.IntroductionStefan-likeproblemswithakineticconditiononthefreeboundarytolinearparabolicequationshavebeenconsideredbyseveralauthors(see[1-4]andreferencestherein),buttoquasi-linearonesproblemssimilar,whichareconsideredhereandmoredifficultthanpreviouso...

简介：为非线性的没有力量的磁场的一些新途径被介绍，新准确答案被发现经分解。例子被给，到象tokamak一样的天体物理学的太阳的血浆或/并且spheromak血浆的结果的一些含意被讨论。

简介：Inthisarticle,AHPS(3-allyloxy-2-hydroxy-1-propanesulfonatesalt)wassynthesizedtouseinemulsifier-freeemulsionpolymerizationofBA/BMA/MMAsystemforhighsolidcontentlatexes.Storagestability,flowbehaviorofthelatexes,morphologyoftheobtainedlatexparticles,dynamicviscoelasticbehavior,tensilestrengthandwaterresistancepropertiesoftheresultedcopolymerswereinvestigated.TheexperimentalresultsshowthatwiththeadditionofAHPS,stabilityoftheemulsionisgreatlyimprovedthatthereappearsnoapparentprecipitationduringthepolymerizationandstorageatroomtemperaturefor6monthsandat-10℃forfourmonths.FlowofthelatexesfollowstheBinghambodylaws,diameterofthelatexparticlesisabout0.6μm,ofwhichislargerthanthatofbyconventionalemulsionpolymerization(0.12μm).Inaddition,notonlywaterresistanceofthecopolymersobtainedbyemulsifier-freeemulstionpolymerizationisgreatlyimproved,butalsotensilestrengthisobviouslyenhanced.

简介：Inthisstudy,theeffectofthefreesurfaceonthecloudcavitatingflowaroundabluntbodyisinvestigatedbasedonthewatertankexperimentandtheCFDmethod.Numericalresultsareingoodagreementwithexperimentaldata,andthemeshindependenceofthemethodsisverified.Thecavityevolutionprocessincludesthecavitygrowth,there-entrantjet,thecavityshedding,andthecollapse,whichcanallbeobservedfromthewatertankexperiment.Theeffectsofthefreesurfaceonthecavitylength,thethickness,andthecavityevolutionperiodareanalyzedbycomparingthedifferencebetweenthecavitatingflowsontheupperandlowersidesofthebody.Thisstudyalsoexaminestheeffectofthedistancebetweenthefreesurfaceandthemodelthroughaseriesofwatertankexperimentsandnumericalsimulations.Thecavitystabilityandasymmetry,aswellasthethicknessandthevelocityofthere-entrantjetinsidethecavity,whichvarieswiththesubmergeddepth,arediscussedwithconsiderationoftheeffectofthefreesurface.Theeffectofthefreesurfaceonthecavitatingflowaroundthebluntbodyisenhancedwiththedecreaseofthesubmergeddepth.

简介：在这份报纸，理论免费triaxial地球摇摆被开发，新结论被得出：Euler时期应该被第一种完全的椭圆形的积分实际上表示；免费极的运动的踪迹是椭圆形的，它的半未成年者和主要的轴的取向分别地与地球主要的轴A和B近似平行。另外，现在的理论证明有在蜡烛制造者的频率振幅调整的机制摇摆，它可能是解释在蜡烛制造者的振幅和时期之间的关联的一个候选人摇摆。