简介：Inthepresentpaperitwillbeshownthat,bytakingthereferenceframemovingwiththevelocityoffluidattheinterlaceoftwosteadyparallelstreams,thelaminarboundarylayerflowinthetwofluidscanbedecoupledintotwoflows.Theseareexactlythesameasthelaminarboundarylayerflowsalongaflatplate.Andthat,byusingtheexistingexactsolutionofthelaminarboundarylayerequationfortheboundarylayerflowalongaflatplateandappropriateboundaryconditions.Anexactsolutionofthelaminarboundarylayerequationforthelaminarboundarylayerbetweentwoparallelstreamswithdifferentdensities,viscocitiesandvelocitiesisgivenelegantly.ForthecasesconsideredbyLock,theresultsobtainedbythepresentmethodarecomparedwithLock’snumericalcalculationsindetail.

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简介：Asimplelayer-by-layerdepositiontechniquewasusedtofabricatethemultilayerthinfilmsofunmodifiedsilvertriangularnanoplates(AgTNPs).ThemultilayerofAgTNPsthinfilmswerefabricatedbyalternatedepositionofeachanionicsodiumcitratestabilizedAgTNPsandcationicpoly(diallyldimethylammoniumchloride).AllpreparedAgTNPsmultilayerthinfilmswereexhibitedastrongplasmonbandatthewavelengthof667nm,whichconfirmedtheformationofAgTNPsontothesubstrate.Thecharacteristicsofthemultilayerthinfilmswereinvestigatedusingcontactanglemeasurement,UV-visiblespectroscopy,X-raydiffractionanalysis(XRD),atomicforcemicroscope(AFM)andfieldemissionscanningelectronmicroscope(FESEM).Asthesefilmsaretobeusedasamercury(II)colorimetricsensor,thechangesinopticalpropertiesofthefilmswereevaluatedforvariousmercury(Ⅱ)concentrations.AgTNPsassembledintothinfilmsshowedastrongcolorshiftfrombluetomauveandcolorlesswhenexposedtomercury(Ⅱ).Theconstructedmultilayerthinfilmsexhibitedexcellentcolorchangesofmercury(II)withalinearrangebetween0.5and20ppm.Thelimitofdetection(LOD)andlimitofquantitation(LOQ)were0.45±0.002and1.52±0.002ppm,respectively.TherecoveryvaluesofAgTNPsmultilayerthinfilmsaresatisfactoryintherangeof100.1%-106.4%whenappliedtodeterminingmercury(Ⅱ)inwatersamples.

简介：Biocompatible聚合电解质multilayers(PEM)和polysiloxane混血儿涂层被准备改进可被细菌破坏的Mg合金AZ31的腐蚀抵抗。PEM，包含了poly轮流出现，并且poly(allylaminehydrochloride)(哼)，是第一在经由静电的相互作用的AZ31合金底层的表面上自我装配，是指明了(PAH/PSS)5/AZ31。然后，(PAH/PSS)5/AZ31样品被蘸进制作PMTMS的答案拍摄的methyltrimethoxysilane(MTMS)，指定了为PMTMS/(PAH/PSS)5/AZ31。表面形态学，微观结构和这些电影的化学作文被FE-SEM，FTIR，XRD和XPS调查。Potentiodynamic极化，电气化学的阻抗光谱学和氢进化大小证明合成电影显著地提高了的PMTMS/(PAH/PSS)5/AZ31在丝等的AZ31合金的腐蚀抵抗平衡盐答案(HBSS)。PAH和PSS电影有效地包括Ca3(PO4)2和hydroxyapatite改进了帽子混合物的免职(哈)。而且，合成涂层的腐蚀机制被讨论。这些涂层能是为可被细菌破坏的Mg合金的其他的候选人涂层。

简介：Theeffectofthefacethicknesstocoreheightratioondifferentmulti-layerpyramidalcoresandwichcolumnsunderin-planecompressionisinvestigatedtheoreticallyandnumerically.Numericalsimulationisingoodagreementwiththeory.Resultsindicatethatonespecifiedfacethicknesstocoreheightratiocorrespondstooneoptimumlayernumberofmulti-layerpyramidalcoresandwichcolumnsinconsiderationofengineeringapplication.Thisresultcanguidethesandwichstructuredesign.

简介：分别地，搬运器官的轻射出的设备(OLED)的层(HTL)的洞被真空免职和旋转涂层方法处理在哪儿N，N鈥?biphenyl-N，N鈥?二度(3-methylphenyl)-1,1鈥?biphenyl-4,4鈥?diamine(TPD)并且(vinylcarbazole)(PVK)poly充当了洞运输材料。Tris-(8-hydroxyquinoline)铝(Alq3)作为搬运层的轻射出的层和电子被利用。设备房间的基本结构是：indium-tin-oxide(ITO)/PVK：TPD/Alq3/Mg:Ag。设备的electroluminescent(EL)特征被描绘。结果证明EL系列的山峰在530nm被定位，它遵循了Alq3的描绘的光谱。与使用真空免职方法相比，有直到26135cd/m2的最大的发光性的绿排放能被用纺纱涂层技术选择合适的溶剂在15V的开车电压完成，并且它的最大的发光性效率是在5.5V的开车电压的2.56lm/W。CLC数字TN383+.1这个工程被部水平资助和UESTC的年轻优越工程赞助(资助号码：UESTC-2006206）

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简介：轧了射出二极管(LEDs)，薄AlInN层在堵住层(EBL)的电子前面插入了的基于的蓝光试验性地被学习。插入薄EBL能改进轻产量力量并且减少效率，这被发现与常规AlGaN对应物相比低垂。基于数字模拟和分析，当薄AlInN层被使用时，电、光的特征上的改进主要被归因于电子漏电流的减小，它在量井(QW)增加搬运人的集中。

简介：Inthispaper,takingitsturbulentexchangecoefficientasafunctionoftheLagrangiantimescaleandstandardvarianceoftheturbulenceinatmosphere,theatmosphericdispersionPDFmodelsareobtainedonthebasisofatmosphericdiffusionK-theory.Inthemodelthestatisticsofwindspeedaredirectlyusedasitsparametersinsteadofclassicdispersionparameters.Thebi-GaussianPDFisderivedinconvectiveboundarylayer(CBL),fromthestatisticsofverticalvelocityinbothofthedowndraftandupdraftregionsthatareinvestigatedtheoreticallyintheotherpartofthispaper.GivingthedrivenparametersoftheCBL(includingtheconvectivevelocityscalew*andthemixingdepthh_i)andthetime-averagedwindspeedatreleaselevel,thePDFmodelisabletosimulatethedistributionofconcentrationreleasedatanylevelsintheCBL.ThePDF’ssimulationsarefairlyconsistentwiththemeasurementsinCONDORSexperimentortheresultsbroughtoutbysomenumericalsimulations.

简介：Effectsofdepositionlayerpositionandnumber/densityonlocalbendingofathinfilmaresystematicallyinvestigated.Becausethedepositionlayerinteractswiththethinfilmattheinterfaceandthereisanoffsetbetweenthethinfilmneutralsurfaceandtheinterface,thedepositionlayergeneratesnotonlyaxialstressbutalsobendingmoment.Thebendingmomentinducesaninstantout-of-planedeflectionofthethinfilm,whichmayormaynotcausethesocalledlocalbending.Thedepositionlayerismodeledasalocalstressor,whoselocationanddensityaredemonstratedtobevitaltotheoccurrenceoflocalbending.Thethinfilmrestsonaviscouslayer,whichisgovernedbytheNavier-Stokesequationandbehaveslikeanelasticfoundationtoexerttransverseforcesonthethinfilm.Theunknownfeatureoftheaxialconstraintforcemakesthegoverningequationhighlynonlinearevenforthesmalldeflectioncase.Theconstraintforceandfilmtransversedeflectionaresolvediterativelythroughthegoverningequationandthedisplacementconstraintequationofimmovableedges.Thisresearchshowsthatinsomespecialcases,thedepositiondensityincreasedoesnotnecessarilyreducethelocalbending.Bycomparingthethinfilmdeflectionsofdifferentdepositionnumbersandpositions,wealsopresenttheguidelineofstrengtheningorsuppressingthelocalbending.

简介：SomepeoplearesuspiciousoforalEnglishlearningfortheyhavebeenaccustomedtotheoldtraditionalclassroomtraining.Thispaperdiscussessomenewteachingtechniquesinoralclass,whichbreaksthetraditionalteachingmethods.Ifteachersareawareoftheadvantagesofthesenewmethodsandputthemintopractice,thenwecancreatealivelyandnaturalatmospheresothatthestudentswilllosetheirinhibitionandlearnEnglishhappily.Themainpointofthispaperisthatthebestteachingmethodcanproducethebesteffectanditshouldbeacombinationofsomeflexibleandvariousapproachesratherthanonlyonesingleteachingmethodaswellasthecooperationofteacherandstudents.

简介：Wepresentanumericalstudyonthepatternformationinatwo-dimensionalvibratedgranularlayerbyamoleculardynamicsalgorithm.Throughanalysingthegranulardensitydistribution,wecanexploretheinnermovementprocessofparticles.Itisconfirmedthatthereareadispersiveregimeandasaturationregimeforfrequencydependence,betweenwhichacriticalfrequencyexists,Itisfoundthatthereisanothersaturationregimeforthicknessdependence,Thewavelengthincreaseswithincreasinglayerthickness,butthereisacriticalthicknessafterwhichthewavelengthisunchanged.

简介：UsingtheinterpolationtheoryofafamilyoflinearoperatorsandtheSobolevspaces,weintroduceaquantityJ_∈~4(λ)whichdepictstheshapeoftheboundarylayer,andthenanalyzetheboundarysingulartyofJ_∈~4(λ).Ourresultshowsthatthethicknessoftheboundarylayer(ortheregularregionofJ_∈~4(λ))isintrinsicallyrelatedtothereciprocaloftheorderoftheequation;thelossofboundaryconditionsbetweenthesingularsolutionandthelimitsolutiondoesnotinfluencethethicknessoftheboundarylayer,butitinfluencestheprocessofincreasingsingularityofJ_∈~4(λ);themorethelossofboundaryconditions,thesmallertheregionofincreasingsingularity.Finally,wegiveadefinitionofaneighborhoodofsuddenchangeandproposeanopenproblemregardingthisneighborhood.

简介：ADopplersodarsystemcontrolledbymicrocomputerisdescribedinthispaper.Thesodarwasusedtodetecttheverticaldistributionofwindandtemperaturestratificationintheatmosphericboundarylayer.Thedetectingresultsshowthatatnighttheverticaldistributionofwindisverycomplicated,whichcanappearasastructureoftwoorthreelayers.Innocturnalatmosphericboundarylayersometimesthereexistsverythinlayerinmulti-layerinversionanditcanberetainedforalongtime.

简介：Aprogramincorporatingtheparallelcodeoflargeeddysimulation(LES)andparticletransportationmodelisdevelopedtosimulatethemotionofparticlesinanatmosphericturbulentboundarylayer(ATBL).Amodelofparticlesof100-micrometerordercouplingwithlargescaleATBLisproposed.Twotypicalcasesarestudied,onefocusesontheevolutionofparticleprofileintheATBLandthelandingdisplacementofparticles,whereastheotheronthemotionofparticlestream.

简介：Anovelfabricationprocessformicropatternswithcurvaturewasintroduced.Thecurvedstructuresweremadebycompensatingrectangularmicrostructureswithliquidphotoresistlayer.Becauseofthesurfacetensionoftheliquidinmicroscale,variousshapesofmeniscuscanbemadeonthemicrochannels.Themicrochannelsweremadeonthesiliconsubstrateinadvance,andthentheliquidlayerwascoatedonthemicrochannels.Fromthenatureofliquidbehavior,thecurvedpatternswithsmoothsurfaceareobtained,whichcannotbemadeeasilywiththeconventionalmechanicalmachining,aswellaswiththemicrofabricationprocesses,suchaswetanddryetching.Withthisprinciple,itisexpectedthatthesmoothandcurvedsurfacescanbemadebysimpleprocessesandtheresultscanbeappliedwidely,suchasopticalpatterns.

简介：AnewLDMOSTstructure,namedB-LDMOSTthathasaburiedlayerunderthedrainisproposed.Theburiedlayerisnotconnectedtothedriftregion,soitcanoptimizetheverticalfielddistributionandincreasebreakdownvoltage.TheanalysisandthesimulatedresultsshowthatB-LDMOSTcanincreasebreakdownvoltage,withalmostnegligibleinfluenceontheotherparameterssuchason-resistance,switchingtime,andsoon.

简介：Thefar-fieldnoiseradiatedfrommixinglayersisdeterminedbythenear-fieldflowdynamicswhichissensitivetotheinitialperturbationofinstabilityintroducedphysicallyornumerically.Thisstudyfocusesontheeffectsofthephasedelayintwoinitialperturbations,oneatthefundamentalwavenumberandtheotheratitssubharmonicbothcalculatedfromlinearinstabilityanalysis,onthesoundgenerationinmixinglayers.Whendifferentphasedelaysφ_1changingfromzeroto2πisappliedonthefundamentalmode,weobservedifferentvortexmergingprocesses(e.g.vortexpairingortearing).Thestrongnonlinearinteractioninthemergingprocessgeneratesmostofthenoisefrommixinglayers.Thereshowsapatterninaperiodof2πfortheresponseoffar-fieldsoundtothechangeofφ_1.Similareffectsonthedynamicsandacousticscanbeachievedbyaddingdifferentphasedelaysφ_2tothesubharmonicmodeinstead,however,theresponserepeatsinaperiodofonlyπforφ_2.Theeffectsofthecombinationofdifferentphasedelaystootherparameters,includingtheamplitudeandwavenumberforeachperturbations,arealsoinvestigated.Alltheresultsindicateacriticalroleofnonlinearityinthesoundgenerationmechanismofmixinglayers.

简介：TheevolutionofG?rtlervorticesanditsinteractionwithotherinstabilitiesareinvestigatedinthispaper.BoththeMackmodeandtheG?rtlermodeexistinhypersonicboundary-layerflowsoverconcavesurfaces,andtheirinteractionsarecruciallyimportantinboundarylayertransition.WecarryoutadirectnumericalsimulationtoexploretheinteractionbetweentheG?rtlerandtheobliqueMackmode.TheresultsindicatethattheinteractionbetweentheforcedG?rtlermodeandtheobliqueMackmodepromotestheonsetofthetransition.TheforcedobliqueMackmodeissusceptibletononlinearinteraction.BecauseofthedevelopmentoftheG?rtlermode,theforcedMackmodeandotherharmonicmodesareexcited.

简介：ThebiomassesoffishesatthebottomlayeroftheBohaiSeaareextimatedbyanalysingthedataonsamples(447hauls,morethan0.2millioninnumberor20tinweightoffishes)collectedmonthlybyourinstitutefromApril,1982toMay,1983byapairofbottomtrawlsthroughtheBohaiSea.Theexploitationproblemsarealsodiscussedinthispaper.