简介：这份报纸为为敏化染料的太阳能电池(DSSC)经由一起沉淀为TiO2nanoparticles准备建模并且优化作为一条有效途径论述反应表面方法论(RSM)性能。钛(IV)二度--(acetylacetonate)di-isopropoxide(DIPBAT)，isopropanol和水分别地被用作先锋，溶剂和合作溶剂。象准备因素与的水，老化温度和锻烧温度的臼齿的比率主要并且粒子特征和表演上的相互作用效果被调查。粒子特征被X光检查diffractometry(XRD)以主要、第二等的尺寸，晶体取向和形态学决定并且扫描电子显微镜学(SEM)。乐队差距精力和DSSC的力量变换效率被用于表演研究。根据在反应表面方法论(RSM)的变化(ANOVA)的分析，所有三个独立参数是统计上重要的，最后的模型是精确的。模型在1:10:500的DIPBAT-to-isopropanol-to-water的臼齿的比率的最佳的条件下面预言了最大的力量变换效率(0.14%)，变老36潰獳獥楳湯的温度吗？

简介：详细介绍了循环干涉型光纤陀螺仪的实验装置及测试结果.给出了无源和有源补偿两种敏感环结构下的陀螺分辨率公式.在实验装置中采用了大功率光源和低耦合比输入耦合器,以提高光波在敏感环中的循环次数.实验结果表明:光束在敏感环中循环了2～3次,并达到了较好的零偏稳定性.

简介：该型测量组合导航系统是在装船使用４年取得较好效果的情况下，于１９９３年２月通过部级技术鉴定，本文概要介绍了主要功能、技术途径、硬件设计特点、软件设计概况及数据处理技术，并综述了海上试验与试用情况等技术资料。

简介：WithTi(OBu)4asprecursor,andHAcascomplexingagent,pureandW-dopedTiO2gelatinswerepreparedbyasol-gelmethod.Duringtheprocessofgelformation,metalionsweredispersedintheporousTiO2matrix.Then,powdersofnano-TiO2andW-dopednano-TiO2werepreparedbydrying,grindingandheattreatmentatdifferenttemperatures.Thegrainsizeandstructureofthesamples,pureTiO2andW-doped,andtreatedatdifferenttemperatures,werestudiedbyX-raydiffraction(XRD),BeckmanCoulterSorptionAnalysisandTEM.Resultsshowedthat,withincreasingtemperature,theTiO2transformedfromanatasetorutileandthegrainsizeincreased.ThistransformationandgraingrowthofTiO2couldberetardedbydopingwithW.

简介：部分地，聪明切割的过程，缺陷由尺寸描绘了的结合的效果和在切开前后的内部压力上的2纸被使用破裂力学模型学习。有大尺寸的结合的缺陷是容易的引起缺点生长的严重偏差，这被发现，当切开时，导致薄层的一个非转移的区域。在结合的缺陷的内部压力是很小的一个实际聪明切割的过程，大界面的缺点总是在切开的过程支持缺点生长。同时，增加结合的缺陷的内部压力减少在切开前的缺点生长和它的偏差。stiffener限制的松驰的机制被建议澄清结合的缺陷的效果。而且，当结合的缺陷是在场的时，切开的过程的进步被分析。在切开以后，有大尺寸和高内部的压力的那些结合的缺陷在高温度的退火期间为薄电影的blistering是脆弱的。

简介：Inthisstudy,factorsaffectingthecrystalstructureofflame-synthesizedY2O3:Euparticleswereinves-tigated,especiallytheparticlesizeeffectanditsinteractionwithEudopingconcentration.PolydisperseY2O3:Eu(sizerange200nmto3m)powdersampleswithEudopingconcentrationsfrom2.5mol%to25mol%weregeneratedineitherH2/airorH2/O2substrate-freeflames.ThecrystalstructureofthepowdersampleswasdeterminedbypowderX-raydiffraction(XRD),whichwascomplementedbypho-toluminescence(PL)measurements.Singleparticlecrystalstructurewasdeterminedbysingleparticleselectedareaelectrondiffraction(SAED),andforthefirsttime,byelectronbackscatterdiffraction(EBSD).H2/airflamesresultedincubicphaseY2O3:Euparticleswithhollowmorphologyandirregularshapes.ParticlesfromH2/O2flameshaddenseandsphericalmorphology;sampleswithlowerEudopingconcen-trationshadmixedcubic/monoclinicphases;sampleswiththehighestEudopingconcentrationswerephase-puremonoclinic.ForsamplesgeneratedfromH2/O2flames,aparticlesizeeffectanditsinteractionwithEudopingconcentrationwerefound:particlessmallerthanacriticaldiameterhadthemonoclinicphase,andthiscriticaldiameterincreasedwithincreasingEudopingconcentration.Thesefindingssug-gestthattheformationofmonoclinicY2O3:Euisinevitablewhenextremelyhotsubstrate-freeflamesareused,becausetypicalflame-synthesizedY2O3:Euparticlesizesarewellbelowthecriticaldiameter.However,itmaybepossibletogenerateparticleswithdense,sphericalmorphologyandthedesiredcubicstructurebyusingamoderatelyhighflametemperaturethatenablesfastsinteringwithoutmeltingtheparticles.

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？

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简介：3-DevolutionofKarmanvortexfilamentsandvortexfilamentsinbraidregionsintheturbulentwakeofa2-Dcirculaxcylinderisinvestigatednumeri-callybasedoninviscidvortexdynamicsbyanalyzingtheresponseoftheinitially2-Dspanwisevortexfilamentstoperiodicspanwisedisturbanceofvaryingmagnitude,wavelengthandinitialphaseangles.Ourresultsrevealakindof3-Dvortexsysteminthewakewhichconsistsoflargescalehorseshoe-shapedvorticesandsmallscaleλ-shapedvortexfilamentsaswellasvortexloops.Themechanismandthedynamicprocessaboutthegenerationofstreamwisevorticalstructureandthe3-Dcoherentstructurearereported.

简介：Nanostructuredtransitionmetaloxidesarepromisingalternativeanodesforlithiumionbatteries.Li-ionstorageperformanceisexpectedtoimproveifhighpackingdensityenergyparticlesareavailable.Herein,Mn2O3microsphereswithaca.18μmdiameterandatappeddensityof1.33g/cm3weresynthesizedbyafacilesolvothermal-thermalcoversionroute.SphericalMnCO3precursorswereobtainedthroughsolvothermaltreatmentandtheydecomposedandconvertedintoMn2O3microspheresatanannealingtemperatureof700C.TheMn2O3microspheresconsistedofMn2O3nanoparticleswithanaverage40nmdiameter.TheseporousMn2O3microspheresallowgoodelectrolytepenetrationandprovideanionbufferreservoirtoensureaconstantelectrolytesupply.TheMn2O3microsphereshavereversiblecapacitiesof590and320mAh/gat50and400mA/g,respectively.Wethusreportanefficientrouteforthefabricationofenergyparticlesforadvancedenergystorage.

简介：针对SINS/GPS组合导航系统中的GPS故障,结合GPS导航定位信息的特点,提出了基于改进型灰色预测的GPS故障预测模型,实现了GPS故障预测;结合SINS/GPS组合导航系统数学模型,进行了基于改进型灰色预测的SINS/GPS组合导航系统仿真。仿真结果表明,GPS位置数据预测残差小于1.5m;在GPS短暂故障期间,由预测数据取代GPS故障数据,可以有效提高SINS/GPS组合导航系统的抗干扰能力,保证其导航精度;比较GPS故障数据和预测数据,并根据故障数据的持续时间和变化特点等,可以诊断GPS故障是硬件故障还是外部干扰的影响,有助于实现GPS的故障判别与隔离。

简介：TiO2-loadedactivatedcarbonfibers（ACF）werepreparedbyahydrothermalmethod.Thesampleswerecharacterizedbyscanningelectronmicroscopy（SEM）,X-raydiffraction（XRD）,Fouriertransforminfrared（FT1R）spectrometryandUV-visdiffusereflectancespectra（DRS）.SEMimagesshowedthattheTiO2nanoparticlesweredepositedonthesurfaceofACF,andtheparticlesizeandloadingamountofTiO2werevariedbychangingtheinitialconcentrationoftetrabutyltitanate（TBOT）.TheresultsofanashexperimentshowedthattheloadingamountsofTiO2were18.4%,43.3%,52.5%,75.1%,and91.1%forinitialconcentrationsofTBOTof0.07,014,0.21,0.28,and0.35mol/L,respectively.PhysicalinteractionsplayedanimportantroleintheformationofTiO2/ACFcompositefibersthatabsorbUVandvisiblelight.ComparedwiththoseofACF,improvedadsorptionandphotocatalyticactivitytowardRhodamineB（RhB）wereobservedforTiO2/ACFcompositefiber.TheRhodamineBcouldberemovedefficientlybyTiO2/ACFcompositefibers,andtheTiO2loadingamounthadasignificanteffectonthephotocatalyticactivityofTiO2/ACFcompositefibers.

简介：Fortwo-dimensionnonlinearconvectiondiffusionequation,atwo-gridmethodofcharacteristicsfinite-elementsolutionwasconstructed.Inthismethodthenonlineariterationsisonlytoexecuteonthecoarsegridandthefine-gridsolutioncanbeobtainedinasinglelinearstep.Forthenonlinearconvection-dominateddiffusionequation,thismethodcannotonlystabilizethenumericaloscillationbutalsoacceleratetheconvergenceandimprovethecomputationalefficiency.Theerroranalysisdemonstratesifthemeshsizesbetweencoarse-gridandfine-gridsatisfythecertainrelationship,thetwo-gridsolutionandthecharacteristicsfinite-elementsolutionhavethesameorderofaccuracy.Thenumericalexampleconfirmsthatthetwo-gridmethodismoreefficientthanthatofcharacteristicsfinite-elementmethod.

简介：Aself-adaptiveprecisealgorithminthetimedomainwasemployedtosolve2-Dnonlinearcoupledheatandmoisturetransferproblems.Byexpandingvariablesatadiscretizedtimeinterval,thevariationsofvariablescanbedescribedmoreprecisely,andanonlinearcoupledinitialandboundaryvalueproblemwasconvertedintoaseriesofrecurrentlinearboundaryvalueproblemswhicharesolvedbyFEtechnique.Inthecomputation,noadditionalassumptionandthenonlineariterationarerequired,andacriterionforself-adaptivecomputationisproposedtomaintainsufficientcomputingaccuracyforthechangesizesoftimesteps.Inthenumericalcomparison,thevariationsofmaterialpropertieswithtemperature,moisturecontent,andbothtemperatureandmoisturecontentaretakenintoaccount,respectively.Satisfactoryresultshavebeenobtained,indicatingthattheproposedapproachiscapableofdealingwithcomplexnonlinearproblems.

简介：Carbonnanotube（CNTs）/Fe-Ni/TiO2nanocompositephotocatalystshavebeensynthesizedbyaninsitufluidizedbedchemicalvapordeposition（FBCVD）method.ThecompositephotocatalystswerecharacterizedbyXRD,Ramanspectroscopy,BET,FESEM,TEM,UV-visspectroscopy,andXPS.TheresultsshowedthattheCNTsweregrowninsituonthesurfaceofTiO2.Fe（lll）inTiO2showednochemicalchangesinthegrowthofCNTs.Ni（Ⅱ）waspartlyreducedtometalNiintheFBCVDprocess,andthemetalNiactedasacatalystforthegrowthofCNTs.ThephotocatalyticactivitiesofCNTs/Fe-Ni/TiO2decreasedwiththeriseoftheFBCVDreactiontemperature.ForthesamplesynthesizedatlowFBCVDtemperature（500℃）,morethan90%andnearly50%ofmethylenebluewereremovedunderUVirradiationin180minandundervisiblelightirradiationin300min,respectively.TheprobablemechanismofsynergisticenhancementofphotocatalysisontheCNTs/Fe-Ni/TiO2nanocompositeisproposed.

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简介：阴极材料李[CoxNiyMn1?x?y]为锂的O2第二等的电池被一条新线路作为一位先锋用分层的双氢氧化物(LDH)准备了。结果有-NaFeO2结构的分层的阶段在菱形的系统结晶，与有到0.47nm的夹层间距结束的空格组R-3m。X光检查光电子光谱学(XPS)被用来测量公司，Ni和Mn的氧化状态。在结构和李的电气化学的性质上改变Co/Ni/Mn比率的效果[CoxNiyMn1?x?y]O2被X光检查衍射和电气化学的测试调查了。产品表明了相当稳定的骑车行为，与为有Co/Ni/Mn=1/1/1的分层的材料的118mAh/g的一个可逆能力。

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简介：等离子体合成射流控制技术因其具有不需要外部气源,工作频带宽,射流速度高,射流净质量通量为零,低功耗,激励器形式多样,环境适应性强等特点,成为了目前针对高速流场主动流动控制技术中应用潜能大、有望实现实际工程应用突破的流动控制装置.传统的等离子体激励器的出口多为垂直于流向或与流向成一定夹角,故垂直于流向的动量分量会对激励器的流动控制能力产生影响.为增强流向动量注入能力,拟设计一种新型的水平动量注入型等离子体合成射流激励器.本文主要内容有:采用外部电路电参数测量与高速纹影技术,对激励器常压下单周期工作特性与重频工作特性进行了初步研究.对水平动量注入型等离子体合成射流激励器的射流结构进行分析,探究该激励器工作频率对射流流场的流场特性与控制能力的影响.最后在高速纹影测量的基础上,开展了激励器高频工作时均出口动压的研究.实验表明:水平动量注入型激励器单周期射流初始速度达到220m/s单周期激波初始速度达到477m/s.此外,工作频率对于激励器的影响主要体现在对激励器控制范围的影响,当激励器工作频率增高时,在相同位置时激励器的动压输入能力下降.

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