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

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简介：Acoupledmaplatticeswithconvectivenonlinearityor,forshort,ConvectiveCoupledMap(CCM)isproposedinthispapertosimulatespatiotemporalchaosinfluidflows.ItisfoundthattheparameterregionofspatiotemporalchaoscanbedeterminedbythemaximalLiapunovexponentofitscomplexitytimeseries.Thissimplemodelimpliesasimilarphysicalmechanismforturbulencesuchthattheroutetospatiotemporalchaosinfluidflowscanbeenvisaged.

简介：ThisreportgivesabriefintroductiontokeyThaiorganizations,includingresearchinstitutionsandacademicdepartments,activeinparticletechnology.ThisisfollowedbyadescriptionofthelatesttrendofpowdertechnologyandnanoparticletechnologyinThailand.

简介：经过有几何骚乱的方形节的柱体的流动被数字模拟调查。额外的条款，由于印射转变模仿的介绍，进转变Navier的骚乱的效果司烧方程，是正确地发源，并且在以前的文学的不正确的被指出并且分析。而且，在涡度之间的关系特别在柱体表面上，并且骚乱理论上被导出并且解释。计算与另一个目的在0.006，0.025和0.167的起浪的100和180和三个振幅的二个雷纳兹数字被执行在身体上在wake和力量在旋涡动力学上探索不同雷纳兹数字和骚乱的效果。数字结果证明了在0.025的温和起浪，流的Kármán旋涡为Re=完全被压制100，当强迫的旋涡脱臼被显得在时近在180的雷纳兹数字醒来。drag减小在Re=直到21.6%100和25.7%在Re=180为0.167的高起浪与非起浪的柱体相比。电梯和与不同雷纳兹数字和波浪险峻改变的Strouhal数字也被获得。

简介：Airdistributionincommercialairlinercabinsisveryimportantforthecomfortandhealthofpassengersandcrew.Experimentalmeasurements,computationalfluiddynamics(CFD)simulations,andinversemodelingarestate-of-the-artmethodsavailableforstudyingtheairdistribution.Thispapergaveanoverviewofthediferentexperimentalmodels,suchasscalemodels,simplifiedmodels,full-scalemockups,andactualaircabins.Althoughexperimentalmeasurementswereexpensiveandtimeconsuming,thedatawereessentialforvalidatingCFDsimulations.DiferentmodelingstrategiesforCFDsimulationswerealsodiscussedinthispaper,includinglargeeddysimulationsandReynoldsaveragedNavier–Stokesequationmodeling.CFDsimulationsweremainstreamapproachesforstudyingtheairdistributionbuttheycouldnoteasilyleadtooptimaldesign.Inversemodelingofairdistributionhasrecentlyemergedintoaverypowerfulandattractivetoolfordesigningtheairdistributioninairlinercabins,althoughmostofthestudieswerepreliminary.

简介：Thesystemofturbulentthermalconvectionisintroduced.Progressesinrecentdecadesinthefourmajorareasofresearchinturbulentconvectionarebriefyreviewed.Someoftherecenttrendsofthefeldarethendiscussed,whichalsoservetopointoutthatthefuturedirectionsinthisimportantfeldoffuidmechanicslieintheextensiontothenon-standardornon-classicalRayleigh–Bénardconfguration.

简介：Thefatiguelifeofnumerousaerospace,locomotive,automotiveandbiomedicalstructuresmaygobeyond10~8cycles.Determinationoflonglifefatiguebehaviorbecomesextremelyimportantforbetterunderstandinganddesignofthecomponentsandstructures.Initially,beforetheinventionofultrasonicfatiguetesting,mostoftheengineeringmaterialsweresupposedtoexhibitfatiguelifeupto10~7cyclesorless.Thispaperreviewscurrentunderstandingofsomefundamentalaspectsonthedevelopmentofacceleratedfatiguetestingmethodanditsapplicationinultra-highcyclefatigue,crackinitiationandgrowthmechanismsofinternalfracture,S-Ndiagram,fatiguelimitandlifeprediction,etc.

简介：Inthispaper,thebasicequationsgoverningtheflowandheattransferofanincompressibleviscousandelectricallyconductingfluidpastasemi-infiniteverticalpermeableplateintheformofpartialdifferentialequationsarereducedtoasetofnon-linearordinarydifferentialequationsbyapplyingasuitablesimilaritytransformation.Approximatesolutionsofthetransformedequationsareobtainedbyemployingtheperturbationmethodfortwocases,i.e.,smallandlargevaluesofthesuctionparameter.Fromthenumericalevaluationsofthesolution,itcanbeseenthatthevelocityfieldatanypointdecreasesasthevaluesofthemagneticandsuctionparametersincrease.Theeffectofthemagneticparameteristoincreasethethermalboundarylayer.Itisalsofoundthatthevelocityandtemperaturefieldsdecreasewiththeincreaseinthesinkparameter.

简介：Thisletterpresentsanewanalyticalapproximationforwave(current)-induceddynamicsoilresponseinmarinesediments.Inthemodel,thethird-orderapproximationforwave-currentinteractionsisemployedfortheflowmodel,whileBiot’sdynamicporo-elasticmodelisusedtosimulatetheporousflowinaseabed.Thenewlyanalyticalsolutionisvalidatedwiththefieldobservations.Basedonthesolution,effectsofcurrentsandwave-nonlinearityonsoilresponseareexaminedandaparametricstudywillbecarriedouttoexaminetheinfluenceofcurrentsontheliquefactionpotential.

简介：Asaresultsofmagnetoelasticinteraction,themechanicalbehaviorofcurrent-carryingcoilstructures,suchasdeformationandinstability,isakeyprobleminthedesignofstrongfieldmagnets.Inthispaper,anonlinearmathematicalmodelispresentedtodescribethedeformationandbucklingofD-typecurrent-carryingcoils,basedontheBiot-Savartlawandthebendingtheoryofcurvedbeams.Thebendingdeformation,thecriticalvalueofcurrentforthemagnetoelasticbucklingofthecurrent-carryingcoil,andtheeffectsofthetypeandnumberofsupportsatmiddlepartofthebendingcoilonthecriticalvaluearequantitativelyinvestigatedbyasemi-analyticalandsemi-numericalmethod.Thenumericalresultsareshowntobeingoodagreementwiththeexperimentaldata.

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

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简介：纸是调查利用建设和拆毁(C&D)的可能性的礼品的目的作为波特兰水泥的代用品浪费未加工的饭。那么被使用的C&D浪费，再循环的具体总数(RCA)和再循环的石工技术总数(RMA)在古代希腊的一地方区域从拆毁的大楼被导出，希腊。因为他们的石灰质、硅质的起源，RCA和RMA样品分别地被选择，它遵守了平常的波特兰水泥的作文未加工的饭。为那个原因，水泥的六件样品未加工的饭被准备：有平常的原料的作为一件参考书样品，并且五由在适当比例与RCA和RMA混合参考书样品。产生混合物的反应上的效果，在1350°C，1400°C和1450°C在混合物sintered根据免费石灰内容(fCaO)被评估。测试证明增加的再循环的总数改进了水泥的灼伤能力没有否定地影响水泥clinker性质的未加工的饭。而且，生产的钱ers(在1450°C的sintered)的主要部件(C3S，C2S，C3A和C4AF)的形成被X光检查衍射(XRD)支持。

简介：包括清除的干燥免职和装紧和成核，由干燥、湿的过程的尺寸依赖者喷雾器移动上的当前的知识的地位被考察。在清除的干燥免职andbelow云上的理论评价和测量数据之间的Thelargest差异为亚微米粒子。早干燥的免职模型，基于房间和风隧道大小发展了，趋于与最近的领域大小相比由约一个数量级为亚微米粒子低估干燥免职速度(V_d)。最近发达的模型能为亚微米粒子预言合理V_d值，但是转移到更大的粒子的预言的最小的V_d缩放的不现实的联盟者。实质地也由掉落的液体落下喷雾器粒子清除的装紧的理论研究为亚微米粒子低估清除系数。基于领域，大小能作为理论清除模型的一种选择服务的实验公式。清除的解决ofsize的装紧建模的未来开发需要包括更多的降水性质(例如，微滴表面区域)并且被详细的云评估微物理模型和可得到的大小。为空隙的喷雾器的in-cloudremoval的几个最近发达的成核清除parameterizations当与包裹模型作比较时，给可比较的结果；然而，一旦合适的地大小是可得到的，他们需要被验证。理论的更多和领域研究也被需要以便更好在清除的成核理解器官的喷雾器的角色过程。

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

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.