简介：Inthispaper,westudytheunsteadycoupledheatandmasstransferoftwo-dimensionalMHDfluidoveramovingoscillatorystretchingsurfacewithSoretandDufourefects.Viscousdissipationefectsareadoptedintheenergyequation.Auniformmagneticfieldisappliedverticallytotheflowdirection.Thegoverningequationsarereducedtonon-linearcoupledpartialdiferentialequationsandsolvedbymeansofhomotopyanalysismethod(HAM).Theefectsofsomephysicalparameterssuchasmagneticparameter,Dufournumber,Soretnumber,thePrandtlnumberandtheratiooftheoscillationfrequencyofthesheettoitsstretchingrateontheflowandheattransfercharacteristicsareillustratedandanalyzed.

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简介：阐明physisorbed的效果几何学和hydrogenated钻石电影的电子结构上的活跃离子，HCO3-的模型，H3O+,并且哦hydrogenated钻石(100)上的离子physisorbed出现被构造。密度功能的理论被用来计算状态的几何学，吸附精力，和部分密度。结果证明表面都在离子吸附以后改变了到不同的度的hydrogenated钻石(100)的几何学。在他们之中，H3影响的O+离子hydrogenated钻石(100)的几何学出现大多数。这与计算吸附精力的结果很好一致，它显示一个强壮的静电的吸引力发生在hydrogenated钻石(100)之间表面和H3O+离子。另外，电子从hydrogenated钻石(100)显著地转表面到吸附的H3O+离子，它导致一向下变在H3O+离子。然而，为活跃离子喜欢哦和HCO3-，没有戏剧的变化为吸附的离子的电子结构出现。

简介：Simpleandefficientsurfaceacousticwave(SAW)two-portresonatorswithlowinsertionlossandhighQ-valuesonST-Xquartzsubstrateusingacorrosion-proofA1/Au-stripeelectrodestructurearedevelopedforgassensing.Itwascomposedoftwoshortedgratingreflectorsandadjacentintedigitaltransducers(IDT),andanactivemetalfilminthecavitybetweentheIDTsforthesensitivefilmcoating.Thedevicesareexpectedtoprovidegoodprotectiontowardsmetalelectrodeforgassensorsapplicationinchemicallyreactiveenvironments.Excellentdeviceperformanceaslowinsertionloss,highQfactorandsingle-modeareachievedbycarefullyselectingthemetallicelectrodethickness,cavitylengthandacousticaperture.Priortofabrication,thecouplingofmodes(COM)modelwasperformedfordevicesimulationtodeterminetheoptimaldesignparameters.Thefabricatedsingle-modeSAWresonatoratoperationfrequencyof300MHzrangeexhibitsmatchedinsertionlossof~6.5dBandloadedQfactorinthe3000range.Usingthefabricatedresonatorasthefeedbackelement,adualresonator-oscillatorwithexcellentfrequencystability(0.1ppm)wasdevelopedandevaluatedexperimentally,anditissignificantforperformanceimprovementofSAWgassensor.

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简介：Thebubblesriseupandburstatthefreesurfaceisacomplextwo-phaseprocess.AfreeenergylatticeBoltzmannmethod(LBM)modelisadoptedinthispapertostudythisphenomenon.Theinterfacecapturingtechnique[Zhengetal.,2006]isusedtodealwiththehighdensityratioproblem.TheLaplacelawandtheair-waterinterfacecapturingabilityarevalidatedforthemultiphasemodel.Theinteractionbetweenthesinglebubbleormultiplebubblesandthefreesurfacearestudiedbythemultiphasemodel.Theforceactingonthebubbleandtheevolutionofthefreesurfaceisstudied.Meanwhile,effectoftheinitialdistancebetweentwoadjacentbubblesoninteractioneffectsofmultiplebubblesisinvestigatedaswell.

简介：从不同光谱形状在水表面上与非线性的最少平方的回归相结合到份量上估计降雨率的一个方法由雨产生了--在一些频率乐队的秋天被介绍。降雨产生的大约2000min光谱数据被收集了在一在厦门开湖城市。作为结果，在15-30kHz的光谱形状被适合到从没有雨，毛毛雨降雨率10mm/h和大雨降雨评估的光谱斜坡允许雨的分类进三个范畴的木头线性的法律10ram/h。然后，降雨察觉被做，降雨率在2-15的频率乐队与逻辑模型一起在毛毛雨时间被确定kHz，和在重降雨的降雨率也与木头线性的回归确定了。最后，所有测量光谱数据被用来与算法计算降雨率。结果证明估计的降雨率与同时地测量的是可比较地重合的。积聚的降雨的平均错误仅仅每min是1%-4%。

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简介：Recently,theirradiationeffectsinnanomaterialshavebeenahottopicinnanoscience.Althoughirradiationinduceddamageshavebeenstudyingforalongtime,verylimitedresearchhasbeenperformedonthedamagesinducedbyMeV-energyheavyionsingoldnanowires(NWs).Inthiswork,wereportastudyoftheirradiationeffectsonsinglecrystallinegoldNWs,whicharefabricatedelectrochemicallyintheetchediontracktemplates.Theas-preparedgoldNWsontheAu/CusubstratewerecharacterizedbySEMafterdissolvingthepolycarbonate(PC)template,asshowninFig.1(a).GoldNWswithdiametersfrom20to90nmwerefabricatedtostudythesizedependenceofirradiationdamageinducedbytheheavyions.ToguaranteethatthedifferentNWscouldobtainthesameirradiationfluence,theNWswithdifferentdiametersweremixedtogetherandtransferredtotheTEMgrid,asshowninFig.1(b).

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简介：Inordertosolvethemagneto-hydrodyna-mics(MHD)problems,itisneccessarytocombineMaxwell'sequationswithfluidmechanicsequations.But,underthefirstorderapproximationthemasspointmotivationequationsandelectromagneticbasiclawsare

简介：Fe2O3solwiththeparticlediameterof3-5nmwasflocculatedbytheadditionofSDS,andtheflocculateformedwasredispersedbythefurtheradditionofthatsurfactant.ThusthesurfactantbilayerwasformedonthesurfaceofFe2O3.Theemulsionpolymerizationofstyrene(St)adsolubilizedonthesurfactantadsorbedbilayerwascarriedoutbyinitiatorpotassiumpersulfate(KPS).TheUV-Visandsurfacephotovoltagespectra(SPS)indicatethattheFe2O3particleswereencapsulatedinpolystyrene(PSt)successfully.

简介：在现在的工作，一个计算框架为多尺度的建模和稳固的燃料的分析被建立。一个收拾行李的算法，作为范围或磁盘认为铵高氯酸盐(AP)和铝(艾尔)是粒子被开发匹配尺寸分发和稳固的燃料的卷部分。一个homogenization理论被采用计算一个代表性的体积元素(RVE)的吝啬的压力和紧张。用吝啬的结果，RVE的一种合适的尺寸被决定。没有考虑在粒子和矩阵之间的接口，燃料的松驰的几数字模拟被执行。松驰效果和依赖于应用负担的燃料的非线性的机械行为被讨论。新技术说出基于表面的连贯的行为的A被建议描述由二成分组成的粒子dewetting的现象：一个损坏开始标准和一条损坏进化法律。就接触损坏行为而言的几个例子被计算，损坏接口引起的也非线性的行为在这份报纸被讨论。而且，损坏接口上的批评接触压力，起始的接触僵硬和接触失败距离的效果当模特儿被学习了。

简介：AhighsensitivityD-shapedholedouble-claddingfibertemperaturesensorbasedonsurfaceplasmonresonance（SPR）isdesignedandinvestigatedbyafull-vectorfiniteelementmethod.WithintheD-shapedholedoublecladdingfiber,thehollowD-sectioniscoatedwithgoldfilmandtheninjectedinahighthermo-opticcoefficientliquidtorealizethehightemperaturesensitivityforthefiberSPRtemperaturesensor.ThenumericalsimulationresultsshowthatthepeakinglossoftheD-shapedholedouble-claddingfiberSPRishugelyinfluencedbythedistancebetweentheD-shapedholeandfibercoreandbythethicknessofthegoldfilm,butthetemperaturesensitivityisalmostinsensitivetotheaboveparameters.Whenthethermo-opticcoefficientis-2.8×10-4∕℃,thethicknessofthegoldfilmis47nm,andthedistancebetweentheD-shapedholeandfibercoreis5μm,thetemperaturesensitivityoftheD-shapedholefiberSPRsensorcanreachto-3.635nm∕℃.

简介：Experimentalresultsonthethermalcharacteristicsofair-watersprayimpingementcoolingofhotmetallicsurfacearepresentedanddiscussedinthispaper.Thecontrollinginputparametersinvestigatedwerethecombinedairandwaterpressures,platethickness,waterflowrate,nozzleheightfromthetargetsurfaceandinitialtemperatureofthehotsurface.Theeffectsoftheseinputparametersontheimportantthermalcharacteristicssuchasheattransferrate,heattransfercoefficientandwettingfrontmovementweremeasuredandexamined.Hotflatplatesamplesofmildsteelwithdimension120mminlength,120mmbreadthandthicknessof4mm,6mm,and8mmrespectivelyweretested.Theairassistedwaterspraywasfoundtobeaneffectivecoolingmediaandmethodtoachieveveryhighheattransferratefromthesurface.Higherheattransferrateandheattransfercoefficientswereobtainedforthelesseri.e,4mmthickplates.Increaseinthenozzleheightreducedtheheattransferefficiencyofspraycooling.Ataninletwaterpressureof4barandairpressureof3bar,maximumcoolingrates670℃/sandaveragecoolingrateof305.23℃/swereachievedforatemperatureof850℃ofthesteelplate.

简介：Inthiswork,themorphologiesandporestructuresofaseriesofcorncob-derivedactivatedcarbonsandzeolitetemplatedcarbonwithultrahighsurfaceareawerecarefullyinvestigatedbySEM,HRTEMandN2-sorptioncharacterizationtechnologies.Thehigh-pressurehydrogenuptakeperformancewasanalyzedusingstandardPressure-Composition-Temperatureapparatusinordertostudytheporesizeeffectsonhydrogenuptake.Theseas-obtainedporouscarbonsshoweddifferentcharacteristicsofporesizedistributionaswellasspecificsurfacearea.Theresultsindicatethatthemosteffectiveporesforadsorbinghydrogendependedonthestoragepressure.Theseultramicropores(0.65-0.85nm)couldbethemosteffectiveporesonexcessH2uptakeat1bar,however,micropores(0.85-2nm)wouldplayamoreimportantroleinexcessH2uptakeathigherpressureat77K.Atroomtemperature,poresizeeffectsonH2uptakecapacitywereveryweak.BothspecificsurfaceareaandtotalporevolumeplaymoreimportantrolesthanporesizeforH2uptakeatroomtemperature,whichwasclearlydifferentfromthatat77K.Forapplicationsinfuture,thecorncob-derivedactivatedcarbonscanbemoreavailablethanzeolitetemplatedcarbonsat77K.ElementdopingenhancedhydrogenuptakecouldbemainresearchdirectionforimprovingH2uptakecapacityatroomtemperature.更多还原

简介：一个热水的方法准备的象花的SnO2nanopowders是经由受精与钯修改的表面。晶体结构，形态学，和样品的表面化学状态借助于X光检查衍射(XRD)被描绘，扫描电子显微镜学(SEM)，和X光检查光电子光谱学(XPS)分别地。煤气的察觉到表演也被调查。为220渠湡瑯'T獥?的热水的温度?呎?乔？