简介：Thispaperpresentsasimplenonparametricregressionapproachtodata-drivencomputinginelasticity.Weapplythekernelregressiontothematerialdataset,andformulateasystemofnonlinearequationssolvedtoobtainastaticequilibriumstateofanelasticstructure.Preliminarynumericalexperimentsillustratethat,comparedwithexistingmethods,theproposedmethodfindsareasonablesolutionevenifdatapointsdistributecoarselyinagivenmaterialdataset.

简介：Superdisintegrantsarecross-linkedpolymersthatcanbeusedasdispersantsforfastreleaseofdrugnanoparticlesfromnanocompositemicroparticlesduringinvitroandinvivodissolution.Currentlyavailablesuperdisintegrantparticleshaveaveragesizesofapproximately5-130μm,whicharetoobigfordrugnanocompositeapplications.Hence,productionofstablesuperdisintegrantsuspensionswithlessthan5μmparticlesisdesirable.Here,weexplorethepreparationofcolloidalsuspensionsofanionicandnonionicsuperdisintegrantsusingawetstirredmediamillandassesstheirphysicalstability.Sodiumstarchglycolate(SSG)andcrospovidone(CP)wereselectedasrepresentativeanionicandnonionicsuperdisintegrants,andhydroxypropylcellulose(HPC)andsodiumdodecylsulfate(SDS)wereusedasastericstabilizerandawettingagent/stabilizer,respectively.Particlesizing,scanningelectronmicroscopy,andzetapotentialmeasurementswereusedtocharacterizethesuspensions.Colloidalsuperdisintegrantsuspensionswerepreparedreproducibly.Theextensiveparticlebreakagewasattributedtotheswelling-inducedsofteninginwater.SSGsuspensionswerestableevenintheabsenceofstabilizers,whereasCPsuspensionsrequiredHPC-SDSforminimizingparticleaggregation.Thesefindingswereexplainedbythehigherabsolute(negative)zetapotentialofthesuspensionsoftheanionicsuperdisintegrant(SSG)ascomparedwiththoseofthenonionicsuperdisintegrant(CP).

简介：Polymethylmethacrylate(PMMA)包含了硅石nanocomposite粒子被准备由超声地在硅石大音阶的第五音的表面上在situ导致了甲基methacrylate(MMA)的聚合。nanoparticles被Fourier变换描绘红外线的光谱学(FTIR)，传播电子显微镜学(TEM)，thermogravimetry(TG)，扫描电子显微镜学(SEM)。结果证明有36nm的一种平均尺寸的coreshell结构nanocomposite粒子被获得，并且包含层的聚合物的厚度是大约8nm。有tert丁基hydroperoxide(TBHP)和增加的硅石大音阶的第五音的预告的处理?-methacryloxypropyltrimethoxysilane(MAPTS)显著地提高了封装效果。由聚合物层修改了，硅石粒子能很好在矩阵被驱散并且利用了改进polyacrylates的机械表演。

简介：Analumina-supportedcobaltaerogelcatalystpreparedfromasol-gelandasupercriticaldryingmethodwasusedinthecatalyticdecompositionofmethane.Thephysical-chemicalpropertiesofthecatalystwerecharacterizedanditsactivityformethanedecompositionwasinvestigated.Theeffectsofcalcinationandreactiontemperaturesontheactivityofthecatalystandthemorphologyofthecarbonnanotubesproducedwerediscussed.ACoAl2O4spinelstructureformedinthecalcinedcatalyst.Thequantityofthenanotubesproducedinthereactionincreaseswiththeamountofcobaltinthereducedcatalyst.Ahigherreactiontemperatureleadstoahigherreactionrate,thoughfasterdeactivationofthecatalystoccurswiththechange.Thecarbonnanotubesgrownonthecatalysthavesmoothwallsanduniformdiameterdistribution.

简介：传统的被动吸收器在一个狭窄、肯定的频率乐队以内是充分有效的。解决这个问题，推迟时间的加速反馈被介绍把一个被动吸收器变换成活跃的。两固有并且故意的时间延期被包括。前者主要来自信号获得并且处理，计算，并且适用使活动力量，和它的值被修理。后者在控制器被介绍，并且它的价值是活跃地可调节的。第一，机械模型被建立，频率反应方程被获得。稳定性的区域在控制参数的飞机被描出。第二，控制帕拉的设计计划--米被执行帮助选择反馈获得和时间延期的值。第三，试验性的研究被进行。否定、积极的反馈控制的效果被调查。试验性的结果证明控制参数的合适的选择可以拓宽颤动吸收的有效频率乐队。而且，当被动吸收器完全失败时，推迟时间的吸收器极大地压制主要系统的反响的反应。试验性的结果在对理论预言和数字模拟的好同意。

简介：这篇文章介绍一条灵巧的途径给聚苯乙烯/银(PS/Ag)的准备不对称的混合粒子。在这个方法，polystyrene/polyglycidylmethacrylate(PS/PGMA)Janus粒子经由dichloromethane(DCM)的蒸发从PS/PGMA/DCM-in水乳剂微滴触发的内部阶段分离被综合。然后，Janus粒子是aminated并且顺序获得PS/PGMA-NH2和PS/PGMA-COOH粒子的carboxylated。在由与amine/carboxyl协调的functionalizedPS/PGMA粒子的PGMA半球的表面上自我装配的Ag+。有Ag的7.29wt%的PS/Ag不对称的混合粒子被Ag+的减小获得。扫描电子显微镜学，精力散的X光检查光谱学和传播电子显微镜学结果证实Ag在聚合物粒子的表面上是不均匀地分布式的。

简介：Thespinningsolarsailoflargescalehasbeenwelldevelopedinrecentyears.Suchasolarsailcanbeconsideredasarigid-flexiblemultibodysystemmainlycomposedofaspinningcentralrigidhub,anumberofflexiblethintethers,sailmembranes,andtipmasses.Asimplifiedinterplanetarykite-craftacceleratedbyradiationoftheSun(IKAROS)modelisestablishedinthisstudybyusingtheabsolute-coordinate-based(ACB)methodthatcombinesthenaturalcoordinateformulation(NCF)describingthecentralrigidhubandtheabsolutenodalcoordinateformulation(ANCF)describingflexibleparts.Theinitialconfigurationofthesysteminthesecond-stagedeploymentisdeterminedthroughbothdynamicandstaticanalyses.Thehugesetofstiffequationsofsystemdynamicsissolvedbyusingthegeneralized-alphamethod,andthusthedeploymentdynamicsofthesystemcanbewellunderstood.

简介：Optimalcontrolsystemofstatespaceisaconservativesystem,whoseapproximatemethodshouldbesymplecticconservation.Basedonthepreciseintegrationmethod,analgorithmofsymplecticconservativeperturbationispresented.Itgivesauniformwaytosolvethelinearquadraticcontrol(LQcontrol)problemsforlineartime-varyingsystemsaccuratelyandefficiently,whosekeypointsaresolutionsofdifferentialRiccatiequation(DRE)withvariablecoefficientsandthestatefeedbackequation.Themethodissymplecticconservativeandhasagoodnumericalstabilityandhighprecision.Numericalexamplesdemonstratetheeffectivenessoftheproposedmethod.

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简介：锁泉华的microfibrous网络由8m(dia)的3vol.%组成镍microfibers被利用了骗诱100200mdia的30vol.%。多孔的Al2O3。ZnO和CaO然后被早期的湿受精方法高度驱散到骗诱的Al2O3的毛孔表面上。由于表面区域，毛孔尺寸/粒子尺寸，热传导性，和空体积的唯一的联合，当在甲醇蒸气改过使用了时，产生microfibrous催化剂composites提供了催化的床反应和利用效率的重要改进。粗略地甲酸盐的260mL/min，包括>70%H2，<5%公司和踪迹CH4，与>97%甲醇变换，能在我们骗诱的新奇microfibrous的1cm3床卷被生产在470湩瑡潩?潰祬敭r合成的ZnO-CaO/Al2O3催化剂?鑈я鑈я8

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

简介：Slightlycrosslinkedmonodispersepoly（maleicanhydride-cyclohexylvinylether-divinylbenzene）（MA-CHVE-DVB）microsphereswerepreparedviaprecipitationpolymerizationwhileusing2,2-azobisisobutyronitrileasaninitiatorinamixtureofmethylethylketoneandn-heptanewithoutanystabilizer.Thenumber-averagediameteroftheresultantpoly（MA-CHVE-DVB）microspheresrangedfrom0.478to1.386μmwithapolydispersityindexof1.00to1.02thatdependedonthefeedratiosoftheMA/CHVE/DVBmonomers.Theintroductionofoneelectrondonormonomercyclohexylvinyletherstronglyaffectedtheyield,size,andmorphologyoftheseslightlycrosslinkedmicrospheres.Quinolinetypechelatingresinswereobtainedaftercombiningthepoly（MA-CHVE-DVB）with8-hydroxyquinoline;theadsorptionpropertiesofthesematerialsweremeasuredthroughtheirabilitytoremoveCu2+ionsfromwater.Thepoly（MA-CHVE-DVB）microsphereswithlowdegreesofcrosslinldngprovidedmoreeffectivefunctionalgroupsandthereforebetterionremovalcapabilities.Theseslightlycrosslinkedmicrospheresmayhaveapplicationsinwatertreatmentaswellasinsensinganddrugdelivery.