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简介:Theshrinkageofthecementpastewithlowwater-cementratioatdifferentrelativehumiditywasobservedandanalyzedwithESEManddeformationmaptechnique.ThecrackmorphologywasobservedwithdifferentmagnificationwithSEMandFESEM,andtheformationofthecrackwasobservedwithAFMbetweentwoC-S-Hnanoparticles.Theobservationbymultitechniqueatmultiscaleindicatedthattheshrinkagewasincreasewiththedecreaseofthehumidityduetotheincreaseofthepressureofthecapillarypressure,themorphologyofthecrackinsmallerscalewassimilartothatinthebiggerscale,thesmallercrackdistributedinthelatticeworkofthebiggerones,andthecrackpropagatedalongthegapbetweentwonanoparticlesofC-S-Hwithweakerbonding.
简介:这份报纸学习多相的thermoelasticcomposites的有效性质。把免费精力和吉布斯基于Helmholtz多相的composites的单个阶段,有效有弹性的张肌,热扩大的张肌,和特定的热的免费精力借助于体积一般水准被导出这些阶段免费精力。特别强调以经常紧张、经常压力的状况,修改Eshelby的micromechanics理论在被开发被放在有效的特定的热的新分析表情的推导上,在包括之间的相互作用被考虑。作为一个解说性的例子,为三阶段的thermoelastic的有效的特定的热的分析表示合成被介绍。
简介:Thispaperdescribesamulti-threatreal-timeseparatingsystemforbroadbandanti-radiationmissileseeker.Itpresentsamethod,withadual-portmemoryascomparer,toperformPFandPWhardwarereal-timeseparationandtodeterminethetime-of-arrival(TOA)byuseofsequentialdifferencehistogram(SDIF).Themethodhasbeenappliedtopractice,whichhasachievedgoodresults.
简介:Inthecourseofimprovingand/ordesigninganenergysystem,eitherpurelyeconomiccriteria,althoughtheoverridingcriteria,orpurelyenergy-basedcriteria,althoughtheemphasizedcriteria,cannotseparatelyhandlereal-worldsituationsinasatisfactorymanner,Theeconmiceffectivenessandtheenergyefficiencymustbeconsideredsimultaneouslytodemonstratetheconfilictingandnon-commensurablecharacteristicsofthesemultiplecriteria.Aniterativeandinteractiveapproachtoformulatingandsolvingnon-linearmulti-criteriadecisionmakingproblemsfortheanalysisofanenergysystemisproposed.Itallowsthedecisionmaker(DM)tolearnfromtheavailableinformationanddymamicallychangehismind.Criterionfunctioinscanbetreatedasobjectivefunctions,asconstraintsofassomethinginbetweenbytheDM.Afteraseriesofiterationsandinteractiveprocedures,apreferredsolutioncanbemadeamongthenon-inferiorsetsconsideringthermodymamiccriteriaandeconomiccreteriasimultaneously,asimpleexamplefordesignofahestexchangerisusedtoillustratetheprocedure.
简介:Multi-scalestructuresinvolvedinemulsionandmicrospherecomplexsystemsarepresentedanddiscussed.Thestabilityandspatio-temporalstructuresofemulsions,aswellasnano-structuresformedonthesurfaceofmicrospheresafterpolymerization,areaffectedbythemolecularemulsifier/stabilizerstructuresandtheadsorbedemulsifier/stabilizernano-structuresontheoil/waterinterface.Thebroadsizedistributionandvariationofsurfacefeaturesofdropletsareresponsibleforvariationsoftheadsorbedemulsifier/stabilizerstructuresandthestabilityoftheemulsions.Ontheotherhand,preparationofauniformlysizedemulsionandemploymentofacombinedemulsifier/stabilizersystemcanpreservethestabilityoftheemulsionsandmicrospheres.Theabovephenomenashouldbemodeledbyamultiscalemethod,inordertomaintainthestabilityofindividualemulsionsystemsandrealizethedesirednano-structuresofmicrospheresbychoosingadequateemulsifier/stabilizerandexperimentalparameters.
简介:InthispaperanapproximateequationisderivedtodescribesmoothpartsofthestabilityboundaryforlinearHamiltoniansystems,dependingonarbitrarynumberofparameters.Withthisequation,wecanobtainparameterscorrespondingtothestabilityboundary,aswellastothestabilityandinstabilitydomains,pro-videdthatonepointonthestabilityboundaryisknown.Thendifferentialequationsdescribingtheevolutionofeigenvaluesandeigenvectorsalongacurveonthesta-bilityboundarysurfacearederived.Theseequationsalsoallowustoobtaincurvesbelongingtothestabilityboundary.Applicationstolineargyroscopicsystemsareconsideredandstudiedwithexamples.
简介:TheStokesspectruminthestimulatedRamanscattering(SRS)isverycomplicated.Inthisarticle,weusebothGaussianandLorentzapproximationtoinvestigatethegainpropertiesofmulti-pumpingbroadbandRamanamplifier,andpresentsomeschemesforflatteningthegain.Alltheresultsshowthattheflatnessofthegainspectrumiscloselyrelatedtothepumpingfrequencygrid.ByresearchingthegainpropertiesofRamanamplifiersofsuchITU-TfibersasG.652,G.653,G.655andlargeeffectiveareanon-zerodispersionflatteningfiber,wefindthattheRamangainisassociatedwiththefibertypeanditstransmissioncharacteristics,especiallyitdecreaseswiththeincreaseoftheeffectivecorearea.
简介:THEEFFECTOFTHEINTERACTIONAMONGMULTI-SCALESYSTEMSANDTHEASYMMETRICDYNAMICANDTHERMODYNAMICSTRUCTUREOFTROPICALCYCLONEONITSTRACKXu...
简介:Thispaperstudiesconsensusofaclassofheterogeneousmulti-agentsystemscomposedoffirst-orderandsecond-orderagentswithintermittentcommunication.Forleaderlessmulti-agentsystems,weproposeadistributedconsensusalgorithmbasedontheintermittentinformationofneighboringagents.Somesufficientconditionsareobtainedtoguaranteetheconsensusofheterogeneousmulti-agentsystemsintermsofbilinearmatrixinequalities(BMIs).Meanwhile,therelationshipbetweencommunicationdurationandeachcontrolperiodissoughtout.Moreover,thedesignedalgorithmisextendedtoleader-followingmulti-agentsystemswithoutvelocitymeasurements.Finally,theeffectivenessofthemainresultsisillustratedbynumericalsimulations.
简介:Directcalculationsofabsorptionspectraformulti-quantumwellstructuresbyextractingfielddistributionsatwellpositionsareperformed.ResultsdemonstratethepreviouslyreportedBraggsuppression,andagreeexactlywiththeindirectcalculationbylineardispersiontheory.ThisrevealsthatBraggsuppressioneffectinfactoriginatesfromtheremarkablydecreasedintensitiesatwellpositionsbyBragginterferencecondition,ratherthanfromtheformationofsupperradiantmodes.