简介：ThispaperdescribesanewphenomenonofacousticstreamingwhichtakesplacewhenaHelmholtzresonatorisexcitedbyaninsidesoundsourcewithresonantfrequency,andtakestheformofastrongturbulentjet.Theflowvisualizations,hotwireandLDVmeasurementsarecombinedtoinvestigatetheprocessofacousticstreaming.ItisfoundthatthiskindofacousticstreamingresultsfromthecontributionofReynoldsstress.

简介：一在标志空间的众所周知的混乱印射是印射的移动。然而，在标志空间的另外的混乱mappings也存在。基本变化是同等地在是的一套时间考虑这个过程不仅spaced，在分开统一时间说(印射的移动)，但是在不是的一套时间同等地spaced，如果联合起来的时间不能被确定，说。增加作为印射的移动和k-switchmapping的归纳印射被介绍。增加和k开关mappings是混乱的。

简介：Thepaperdiscusseshowtoreducehighersingularityorderofaboundaryintegralequation.Theapproachwillbediscussedinsomedetailforplaneelasticity.Numericalresultsforthemeshesofunequallengthboundaryelementsarereported.Higherprecisionforbothdeflectionandforceisobtainedthanthatobtainedwithageneralboundaryelementmethod.

简介：IncrementalalgorithmisoneofthemostpopularproceduresforconstructingDelaunaytriangulations(DTs).However,thepointinsertionsequencehasagreatimpactontheamountofworkneededfortheconstructionofDTs.Itaffectsthetimeforbothpointlocationandstructureupdate,andhencetheoverallcomputationaltimeofthetriangulationalgorithm.Inthispaper,asimpledeterministicinsertionsequenceisproposedbasedonthebreadth-first-searchonaKd-treewithsomeminormodificationsforbetterper-formance.Usingparentnodesassearch-hints,theproposedinsertionsequenceprovestobefasterandmorestablethantheHilbertcurveorderandbiasedrandomizedinsertionorder(BRIO),especiallyfornon-uniformpointdistributionsoverawiderangeofbenchmarkexamples.

简介：Thisinvestigationdiscussesfurthertheextenttowhichanewdamagetheoryrecentlyproposedbytheauthorcanserveasaunifiedtheorytocharacter-izevariousductilefailureproblems.Ageneraldamageintegralandcorrespondingcriterionforductilefracturearepresented.Anewparameterforductilefractureisemphasized,whichisexperimentallyverifiedasamaterialconstantindependentofstressstate,hasclearphysicalmeaning,andcaneasilybedetermined.Theapplica-bilityofthistheorytoevaluationoftheductilityofweldsandengineeringmaterialsundervariousconditionsisexamined.Also,itisusedtopredicttheeffectofresid-ualstressonfailureofwelds,topredictsheetforminglimits,andtocorrelatethevariabilityofelasto-plasticfracturetoughnessvaluesJ1candδcwithdifferentspec-imengeometries.Anewconstraintcorrectionmethodisproposed,andconstraintcorrectednewtoughnessparametersJdcandδdcarerecommended.Experimentshaveshownthatthetoughnessvariationwithdifferentspecimengeometriescanef-fectivelyberemovedbyuseofthemethod.Thegeneralapplicabilityofthetheorytocharacterizationofvariousductilefailuresprovidesanewdesigntoolforengineeringcomponentsorstructures.

简介：Thebasicrelationsinlinearisotropicphotoviscoelasticityhavebeentheoreticallydiscussedinde-tails.Anewroutinehasbeenfoundtoobtainthetime-dependentprincipalstresswithoutthemeasurementofisoclinics.Asatestofourmethod,examplesaregivenattheendofthispaper.

简介：Thecombinationoflaserdiffractionwithupstreamsamplingrealizedabreak-throughforthein-andon-lineparticlessizeanalysisinindustrialapplications.Today,thecombinationofrepresentativesampling,drydispersion,particlesizeanalysisbylaserdiffractionandintegratedfeedbackofthesampleiswellacceptedinmanyindustrialapplications.Nomoreinteractionsoftheuserarerequired,andforstandardapplicationstheon-linemonitoringofparticlesizesbecamenearlyassimpleasthernonitodngofanyotherprocessparameter.Theincreaseofinspectionintervalfrom24-houroperationtomonthshasincreaseduserconfidenceinthistechnology,andindustrieswithmoredemandingmeasurementrequirementsareseekingtobenefitfromthisperformance.Thischallengecouldnotbesolvedwithsimplescale-upsorscale-do,he.Newsolutionshadtobefoundforthesamplingsystem,themeasuringsensor,theadaptationtotheenvironmentalconditionsandtheprocessingoffeslgrowingvolumeofdata.

简介：微生物引起的房间，在免费或使金属离子，器官、无机的xenobiotics或生物学上活跃的混合物的preconcentration或移动不能调动的形式的任何一个，能被用于。这些房间的磁性的修正启用准备能容易在difficult-to-handle样品被操作的磁性的吸附物，例如暂停，面对外部磁场。在这评论，微生物引起的房间的磁性的修正的典型例子被举，以及他们为器官的xenobiotics和重金属离子的分离的可能的应用。

简介：Inordertoovercomethedifficultiescausedbysingularoptima,inthepresentpaper,anewmethodforthesolutionsofstructuraltopologyoptimizationproblemsisproposed.Thedistinctivefeatureofthismethodisthatinsteadofsolv-ingtheoriginaloptimizationproblemdirectly,weturntoseekingthesolutionsofasequenceofapproximatedproblemswhichareformulatedbyrelaxingtheconstraintsoftheoriginalproblemtosomeextent.Theapproximatedproblemcanbesolvedefficientlybyemployingthealgorithmsdevelopedforsizingoptimizationproblemsbecauseitssolutionisnotsingular.Itcanalsobeprovedthatwhentherelaxationparameteristendingtozero,thesolutionoftheapproximatedproblemwillconvergetothesolutionoftheoriginalproblemuniformly.Numericalexamplesillustratetheeffectivenessandvalidityofthepresentapproach.Resultsarealsocomparedwiththoseobtainedbytraditionalmethods.

简介：Anewsmoothgapfunctionfortheboxconstrainedvariationalinequalityproblem(VIP)isproposedbasedonanintegralglobaloptimalitycondition.Thesmoothgapfunctionissimpleandhassomegooddifferentiableproperties.TheboxconstrainedVIPcanbereformulatedasadifferentiableoptimizationproblembytheproposedsmoothgapfunction.Theconditions,underwhichanystationarypointoftheoptimizationproblemisthesolutiontotheboxconstrainedVIP,arediscussed.Asimplefrictionalcontactproblemisanalyzedtoshowtheapplicationsofthesmoothgapfunction.Finally,thenumericalexperimentsconfirmthegoodtheoreticalpropertiesofthemethod.

简介：JacobiellipticfunctionexpansionmethodisextendedtoconstructtheexactsolutionstoanotherkindofKdVequations,whichhavevariablecoefficientsorforcingterms.Andnewperiodicsolutionsobtainedbythismethodcanbereducedtothesolitontypedsolutionsunderthelimitedcondition.

简介：Weprovideanalyticalsolutionstotheproblemsofacircularbendingofabeaminplanestrainandthetorsionofanon-circularcross-sectionbeam,thebeamsobeyingasecond-gradientelasticitylawproposedbytheauthor,followingaprevioussuggestionofdell'Isolaetal.(2009).Themotivationwastofindbenchmarkanalyticalsolutionsthatcanservetograspthephysicalfoundationsofsecondgradientelasticitylawsforheterogeneousmaterials.TheanalyticalsolutionofthecircularbeamproblempresentstheadditionaladvantagetoestablishsomenicepropertiesontheunknownsecondgradientelasticmoduliintroducedbyEnakoutsa(2014)modelandtheclassicalelasticityconstantsforbothincompressibleandcompressibleheterogeneouselasticmaterials.Aframeworktofindtheelasticmoduliofthenewmodelisalsoproposed.

简介：在这研究，在不同温度的多晶的金属的行为被新thermo-elasto-plasticity调查组成的理论。基于机械的固体和interatomic潜力，组成的方程用变丑坡度的新分解?被建立。为多晶的铜和镁，stressstrain从77～764弯K(铜)，和在伪静电干扰下面的77～870K(镁)单轴的装载被计算，然后计算结果与实验结果相比。另外，现在的模型有能力与多晶的金属的变硬的行为的增加的温度，以及变化描述有弹性的模量和收益应力的减少，这被决定。计算过程简单、明确，它使实现进应用容易。

简介：Aso-called“localprobabilisticParisrelationmethod”waspresentedformeasuringtherandomthresholdsoflongfatiguecrackpropagation.Acheckwasmadetotheconventionalmethod,inwhichthethresholdsweremeasuredstatisticallyanddirectlybythetestdata.Itwasrevealedthatthismethodwasnotreasonablebecausethetestdatahaveseldomaunifiedlevelofcrackgrowthrates.Differently,inthepresentedmethodtheParis-Erdoganequationwasappliedtomodelthelocaltestdataaroundthethresholds.Localprobabilisticrelationswithboththesurvivalprobabilityandtheconfidencewereestablishedonalognormaldistributionofthestressdensityfactors.Andthen,theprobabilisticthresholdswerederivedfromtheprobabilisticfactorswithagivencriticallevelofgrowthrate.AnanalysisonthetestdataofLZ50axlesteelfortheChineserailwayvehiclesverifiesthatthepresentmethodisfeasibleandavailable.

简介：Eddy-currentinversetechniqueisaveryimportantmethodtoreconstructtheshapeofflawsorcracks.Usingthedomainderivativeofthefar-fieldpatternforeddy-currentinverseproblemwithDirichletboundarycondition,anewalgorithmtorecovertheshapeofcrackswasconstructedandsomenumericalexamplesweregiven.Thealgorithmdemonstratesthatthealgorithmisfeasibleandcorrectforobtainingareasonablereconstructionofashapeofflawsorcracksfromthefar-fieldmeasurementseventhoughusinglessdataofdirectionsofincidenceandobservationsforfewerwavenumbersaregived.

简介：Bifurcationswithconstraintsareopenproblemsappearedinresearchonperiodicbifurcationsofnonlineardynamicalsystems,butthepresentsingularitytheorydoesn'tcontainanyanalyticalmethodsandresultsaboutit.Asthecomplementtosingularitytheoryandthefirststeptostudyonconstrainedbifurcations,herearegiventhetransitionsetsandpersistentperturbedbifurcationdiagramsof10elementarybifurcationofcodimensionnomorethanthree.

简介：

简介：ThespecificsignofReynoldsstressintheboundarylayeronaflatplateatzeroincidenceisnewlyinterpretedinpresentpaperbasedonthetheoryofvortex-inducedvortex.Itavoidssomeproblemsappearedinatraditionalexplanation,onthebasisofrelationshipbetweenmeanandfluctuatingflowsduetothetransportofmomentum.Throughtheanalysisoflocalflowfieldintheimmediateneighborhoodofwall,thecharacteristicsofReynoldsstressareidentifiedthroughintroducingturbulence-inducedsmall-scalestreamwiseeddiesabovetheflatplate.ThepositiveReynoldsstressistheoreticallyverified.AndsuchnewinterpretationillustratesthatthegenerationofReynoldsstress,aswellasfluctuatingvelocity,isintrinsicallyindependentofthemeanflow.Butitsspecificsignwouldbedeterminedbythemeanflowduetotheinertialforces.Otherfeatures,suchastheintensityrelationshipamongthreecomponentsoffluctuatingvelocity,arealsopresented.

简介：TheresultsofplaneturbulentwakegivenbyChouPeiyuanareconsideredasthefirstorderap-proximationandputintotheequationsofturbulentfluctuation.Theequationsaresolvednumericallywithintherangeofmicro-scalebymeansofspectrummethod.Thedouble,tripleandquadruplefluctuatingvelocitycorrelationsareobtainedbycomputation.Theyareingoodagreementwithexperimentalresults.

简介：Inthispaper,anewmethodoftopologicalcleanupforquadrilateralmeshispresented.Themethodfirstselectsapatchofmesharoundanirregularnode.Itthenseeksthebestconnectionoftheselectedpatchaccordingtoitsirregularvalenceusinganewtopologicaloperation:smallpolygonreconnection(SPR).Byreplacingtheoriginalpatchwithanoptimalonethathaslessirregularvalence,meshqualitycanbeimproved.Threeapplicationsbasedontheproposedapproachareenumerated:(1)improvingthequalityofaquadrilateralmesh,(2)convertingatriangularmeshtoaquadrilateralone,and(3)adaptingatrianglegeneratortoaquadrilateralone.Thepresentedmethodishighlyeffectiveinallthreeapplications.