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简介：有Doppler超声技术的传播emboli的非侵略的察觉具有在临床的applications.In顺序的活跃意义消除探针或病人的运动带的人工制品的缺点并且精确地检测emboli，相关特征参数从信号波形的Dopplersignals.The奇特的小浪变换的二个角度被提取基于它的小浪由易到难的试题程序被分析；然后横向、纵的参数被提取到represen

简介：Anewexist-nullcombinedmodelisproposedforthestructuraltopologyoptimization.Themodelisappliedtothetopologyoptimizationofthetrusswithstressconstraints.Satisfactorycomputationalresultcanbeobtainedwithmorerapidandmorestableconvergenceascomparedwiththecross-sectionaloptimization.Thisworkalsoshowsthatthepresenceofindependentandcontinuoustopologicalvariablemotivatestheresearchofstructuraltopologyoptimization.

简介：Basedontheassumptionthatarepresentativeelementofapearliticsteelisanaggregateofnumeroussphericalpearliticcolonieswithrandomlydistributedorientations,andthateachcolonyiscom-posedofmanyparallelfinelamellasofferriteandcementite,adescriptionforthedual-phasepearlilicsteelisobtainedbymakinguseofamicrostructure-basedconstitutiveequationforasingledual-phasepearliticcolonyandtheHill’sself-consistentscheme.Theelastoplasticresponseofdual-phasepearliticsteelBS11subjectedtoasymmetricallycyclicloadingisanalyzed,andacomparisonwiththeexperimentalresultsshowssatisfacto-ryagreement.Thenon-proportionalcyclicplasticityofBS11isalsoanalyzed,inwhichstressdevelopsalongasemi-circleinabiaxialtension/compressionandshearstressplane,asistypicallyexperiencedbythesur-faceelementsinrollingandslidingcontact.

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简介：WefallintodisusetheJUHUsystembasedonthePDP/11computerforRSX11Moperationsystem,andupdateourmulti-parameterdataaequisitionandanalysissystem’shardwareandsoftwarebasedonVAXIIcomputerandOpenVMSoperationsystem,makeitadaptedtotherecentphysicsexperiment.Inthispaper,wedescribetheupdatedinulti-parameterdataacquisitionandanalysissystem’shardware,softwareconfigurationandsystemfunction.

简介：Recentadvancesontheuseofnanocarbon-basedelectrodesfortheelectrocatalyticconversionofgaseousstreamsofCO2toliquidfuelsarediscussedinthisperspectivepaper.Anovelgas-phaseelectrocatalyticcell,differentfromthetypicalelectrochemicalsystemsworkinginliquidphase,wasdeveloped.Thereareseveraladvantagestoworkingasphase,e.g.noneedtorecovertheproductsfromaliquidphaseandnoproblemsofCO2solubility,etc.Operatingundertheseconditionsandusingelectrodesbasedonmetalnanoparticlessupportedovercarbonnanotube(CNT)typematerials,longC-chainproducts(inparticularisopropanolunderoptimizedconditions,butalsohydrocarbonsuptoC8-C9)wereobtainedfromthereductionofCO2.Pt-CNTaremorestableandgiveinsomecasesahigherproductivity,butFe-CNT,particularusingN-dopedcarbonnanotubes,giveexcellentpropertiesandarepreferabletonoble-metal-basedelectrocatalystsforthelowercost.ThecontrolofthelocalizationofmetalparticlesattheinneroroutersurfaceofCNTisanimportactfactorfortheproductdistribution.ThenatureofthenanocarbonsubstratealsoplaysarelevantroleinenhancingtheproductivityandtuningtheselectivitytowardslongC-chainproducts.TheelectrodesfortheelectrocatalyticconversionofCO2arepartofaphotoelectrocatalytic(PEC)solarcellconcept,aimedtodevelopknowledgeforthenewgenerationartificialleaf-typesolarcellswhichcanusesunlightandwatertoconvertCO2tofuelsandchemicals.TheCO2reductiontoliquidfuelsbysolarenergyisagoodattempttointroducerenewablesintotheexistingenergyandchemicalinfrastructures,havingahigherenergydensityandeasiertransport/storagethanothercompetingsolutions(i.e.H2).

简介：Wereportonthefirstmonolithicallyintegratedmicroring-basedopticalswitchintheswitch-and-selectarchitecture.Theswitchfabricdeliversstrictlynon-blockingconnectivitywhilecompletelycancelingthefirst-ordercrosstalk.The4×4switchingcircuitconsistsofeightsiliconmicroring-basedspatial(de-)multiplexersinterconnectedbyaSi/SiNdual-layercrossing-freecentralshuffle.Analysisoftheon-stateandoff-statepowertransferfunctionsrevealstheextinctionratiosofindividualringresonatorsexceeding25dB,leadingtoswitchcrosstalksuppressionofuptoover50dBintheswitch-and-selecttopology.Opticalpathsareassessed,showinglossesaslowas0.1dBperoff-resonanceringand0.5dBperon-resonancering.Photonicswitchingisactuatedwithintegratedmicro-heaterstogivean~24GHzpassband.Thefullypackageddeviceisflip-chipbondedontoaprintedcircuitboardbreakoutboardwithaUV-curvedfiberarray.

简介：Astudyiscarriedoutonthestructuraldesignofwood-plasticcompositefloors.Thegeometricparametersofthecavities,thestructure,andthemeanstooptimizetheperformanceoftheselightboardsareinvestigated.Variousstructuralparametersoftheboards,suchassize,shape,andthepatternofcavitiesarealsostudied.Theoptimalstructurecanbedeterminedbycalculationandanalysisofthestrength,stiffness,weightandcostofthematerial.Afiniteelementmodelforthemechanicalanalysisofwood-plasticcompositefloorsisestablished;andtheresultsareusedtoverifythestrengthcriteriaunderbendingdeformation,whichisthemostcommonloadingconditionofflooringboard.

简介：为了由于不同扬声器，的改变的特征在语音识别减少降级，感性的频率为扬声器正规化基于subglottal回声变弯的一个方法被建议。变弯的因素用在subglottis和元音的道之间的声学的联合从第二subglottal回声被提取。第二subglottal回声独立于讲话内容，它多于第三共振峰反映说话者特征。感性的最小的变化无失真的反应PMVDR系数被使正常化，它是更柔韧的并且比MFCC有更好的反噪音能力。规范的系数在训练的讲话模式和语音识别被使用。实验证明词错误评价，作为与由第三共振峰变弯的MFCC和光谱相比，在吵闹的环境分别地在干净语音识别分别地在4%和3%，并且在9%和5%减少。结果显示建议方法能在一个说话者无关的识别系统改进词识别精确性。

简介：Aseriesofnovelamphibiousorganic/inorganichybridprotonexchangemembraneswithH3PO4dopedwhichcouldbeusedunderbothwetanddryconditionswaspreparedthroughasol-gelprocessbasedonacrylatedtriethoxysilane(A-TES)andbenzyltetrazole-modifiedtriethoxysilane(BT-TES).Thedual-curingapproachincludingUV-curingandthermalcuringwasusedtoobtainthecrosslinkedmembranes.Polyethyleneglycol(400)diacrylate(PEGDA)wasusedasanoligomertoformthepolymericmatrix.Themolecularstructuresofprecursorswerecharacterizedby1H,13Cand29SiNMRspectra.Thethermogravimetricanalysis(TGA)resultsshowthatthemembranesexhibitacceptablethermalstabilityfortheirapplicationatabove200oC.Thedifferentialscanningcalorimeter(DSC)determinationindicatesthatthecrosslinkedmembraneswiththemassratiosofbelow1.6ofBT-TEStoA-TESandthesamemassofH3PO4dopedasthatofA-TESpossessthe-Tgs,andthelowestTg(-28.9℃)existsforthemembranewithdoublemassofH3PO4dopedaswell.Thehighprotonconductivityinarangeof9.4―17.3mS/cmwiththecorrespondingwateruptakeof19.1%―32.8%ofthemembraneswasdetectedat90oCunderwetconditions.Meanwhile,theprotonconductivityinadryenvironmentforthemembranewithamassratioof2.4ofBT-TEStoA-TESanddoubleH3PO4loadingincreasesfrom4.89×10-2mS/cmat30℃to25.7mS/cmat140℃.Theexcellentprotontransportabilityunderbothhydrousandanhydrousconditionsdemonstratesapotentialapplicationinthepolymerelectrolytemembranefuelcells.

简介：Thispaperpresentsanewstrategyofusingtheradialintegrationboundaryelementmethod(RIBEM)tosolvenon-homogeneousheatconductionandthermoelasticityproblems.Inthemethod,theevaluationoftheradialin-tegralwhichisusedtotransformdomainintegralstoequivalentboundaryintegralsiscarriedoutonthebasisofelementalnodes.Asaresult,thecomputationaltimespentinevaluatingdomainintegralscanbesavedconsiderablyincomparisonwiththeconventionalRIBEM.Threenumericalexamplesaregiventodemonstratethecorrectnessandcomputationalefficiencyoftheproposedapproach.

简介：P2Psystemsarecategorizedintotree-basedandmesh-basedsystemsaccordingtotheirtopologies.Mesh-basedsystemsareconsideredmoresuitableforlarge-scaleInternetapplications,butrequireoptimizationonlatencyissue.Thispaperproposesacontentsubscribingmechanism(CSM)toeliminateunnecessarytimedelaysduringdatarelaying.Anodecansendcontentdatatoitsneighborsassoonasitreceivesthedatasegment.Noadditionaltimeistakenduringtheinteractivestagespriortodatasegmenttransmissionofstreamingcontent.CSMconsistsofthreesteps.First,everynoderecordsitshistoricalsegmentslatency,andadoptsgammadistribution,whichpossessespowerfulexpressionability,toexpresslatencystatistics.Second,anodepredictssubscribingsuccessratioofeveryneighborbycomparingthegammadistributionparametersofthenodeanditsneighborsbeforeselectinganeighbornodetosubscribeadatasegment.Theabovestepswouldnotincreaselatencyastheyareexecutedbeforethedatasegmentsarereadyattheneighbornodes.Finally,thenode,whichwassubscribedto,sendsthesubscribeddatasegmenttothesubscriberimmediatelywhenithasthedatasegment.ExperimentsshowthatCSMsignificantlyreducesthecontentdatatransmissionlatency.

简介：Theauthorsderivelawsoftheiteratedlogarithmforkernelestimatorofregressionfunctionbasedondirectionaldata.Theresultsaredistributionfreeinthesensethattheyaretrueforalldistributionsofdesignvariable.

简介：我们认为在线性、非线性的平常的微分方程(颂诗)的参数评价的问题当模特儿。非线性的颂诗模型广泛地在应用被使用。但是他们的分析答案通常不是可得到的。因此常规的方法通常取决于带巨大的计算费用的数字答案的重复使用。我们建议了在第二个阶段在第一个阶段，和一个数字discretization方法(Eulersdiscretization方法，trapezoidaldiscretization方法，或Runge-Kuttadiscretization方法)包括一个变光滑的方法(变光滑的核或本地多项式试穿)的一条新二阶段的途径。通过数字模拟，我们发现建议方法获得在评价精确性和计算费用之间的合适的平衡。Asymptotic性质也被介绍，它在一些温和条件下面显示出一致性和评估者的asymptotic规度。建议方法以精确性和计算费用与存在方法相比。模拟结果证明有在第二个阶段的在第一个阶段和trapezoidaldiscretization的本地线性变光滑的评估者有最低平均相对错误。我们把建议方法用于HIV动力学数据说明评估者的有实行可能。

简介：Bothenantiomersoffluoxetineweresynthesizedinfivestepsfromethylbenzoylacetate(1)usingmicrobial-chemicalapproachwithoverallyieldsof59%and62%respectively.(S)-Enan-tiomercanbeobtainedin>99%e.e.byrestingcellofbaker’syeastandtheRformwasproducedin81%e.e.byimmobilizedGeotrichumsp.G38.

简介：Onthebasisofplasticityandfracturemechanicsforquasi-brittlematerials,thisarticlepresentedaconstitutivemodelforgradualsofteningbehaviorofjointsofgeomaterials.Correspondingnumericaltestsarecarriedoutatthelocallevel.Characteristicsofthemodelproposedare1)plasticsofteninganddilatancybehavioraredirectlyrelatedtothefractureprocessofjoint,andmuchlessmaterialandmodelparametersarerequiredcomparedwiththoseproposedbyreferences;2)theprocessofdecohesioncoupledwithfrictionalslidingatbothmicro-scaleandmacro-scaleisdescribed.

简介：我们为把坚持、有效的抗菌剂性质合并到广泛地使用的聚合物报导灵巧的策略，poly(甲基methacrylate)(PMMA)，由异分子聚合有2-(tert-butylamino)的甲基methacrylate(MMA)在经由原子转移基聚合(ATRP)的一个壶的乙醇methacrylate(TA)。随后自己组装结果poly(甲基methacrylate)-block-poly[(2-tert-butylamino)ethylmethacrylate](PMMA20-b-PTA15)diblock共聚物负担得起明确的水可分散的泡，它能轻易地为有效抑制在医院里在墙上被喷洒并且细菌杀死。1H-NMR和胶化浸透层析(GPC)研究证实了良好共聚物的成功的合成。传播电子显微镜学(TEM)，原子力量显微镜学(AFM)和散布的动态光(DLS)学习与狭窄的尺寸分发证明了泡的形成。DLS研究在各种各样的温度揭示了泡的优秀稳定性。抗菌剂测试对克积极、克否定的细菌显示出聚合物泡的有效抗菌剂活动。而且，这策略可以为在许多领域里为灵巧的抗菌剂应用准备大量聚合材料被扩大。

简介：Thepolymerizationofethylenebytwoiron-basedcatalysts,{[2,6-ArN=C（Me）2C5H3N]FeCl2}（Ar=2,6-C6H3-Me21;2,6-C6Hv3（i-Pr）v2Ⅱ）hasbeeninvestigated.CatalystⅡproduceshighermolecularweightpolyethylene（PE）andbroadenedpolydispersitiesrelativetocatalystⅠunderanalogousconditionsandallpolymersarelinear.Thekineticprofileswithironcatalystsshowedasmoothpatternduringbothratebuild-upandratelowering,whicharedifferentfromthemetallocenecatalysts.ThepolymerizationactivityincreaseswithAl/Fevalueandanoptimumtemperaturerangeat40～45℃wasobserved.ThemolecularweightofPEdecreaseswiththeincreaseofAl/Feratioandriseofpolymerizationtemperature.

简介：Thispaperdiscussesthetime-of-arrival(TOA)basedindoorvisiblelightcommunication(VLC)positioningsysteminanon-line-of-sightenvironment.Thepropagationdelayisassumedtobegammadistributed.ThegeneralizedCramer–Raolowerboundformultipathpropagationisderivedasthetheoreticalaccuracylimitation.Theperformanceofthepositioningsystemisaffectedbytheshapeparameterandthescaleparameterofgammadistribution.Theinfluencesonpositioningaccuracyofmultipatheffectsareanalyzedthroughdiscussingthephysicalmeaningofthegammadistributionparameters.Itisconcludedthatthelowerboundofpositioningaccuracyisattainedwhenvarianceofthenon-line-of-sightpropagation-inducedpathlengthsiszero.Thesimulationresultprovesthatthetheoreticalpositioningaccuracyisintheorderofcentimeterswiththegivenscenario.