简介：Thehighpressureequationofstateforcarbonisconstructedbysomesimplephysicalmodels.Forsolidstate,amultiphaseequationofstateisconsidered,whichincludesfoursolidstates.Forliquidstate,theliquidperturbationtheoryofCRISmodelisused.Inthehightemperature,theelectroniccontributionisobtainedbytheionizationequilibriumtheory.Theresultofourcalculationbasedontheabovemodelsiscomparedwiththefirstprincipledensityfunctionalcalculationandtheothermodels.TheHugoniotandthephasediagramofcarbonarealsocomparedwiththeexperiments.Theresultsaresatisfactory.

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简介：Aerationisanimportantfactoraffectingthebiologicalaerationfilter.Withasetofexperimentdevicespeciallydesignedforthepurpose,andtheparticleimagevelocimetrytechnique,thevelocityfieldofthegas-liquidtwo-phaseflowisstudiedunderdifferentconditions.Thevarioussimulatedaerationstateswereactuallyappliedtotheexperimentaldeviceofsewagetreatment,andtheresultsofthenumericalsimulationwereverified.Thefinalexperimentalresultsindicatethatthemostefficientstateoccurswhentheratioofwaterinaerationtankh/w=1,thediameterofcapillarytubesd=0.6mmandthevelocityofbubblesv=0.3m/s.

简介：Thepresentsimulationinvestigatesthemultiphasecavitatingflowaroundanunderwaterprojectile.BasedontheHomogeneousEquilibriumFlowassumption,amixturemodelisappliedtosimulatethemultiphasecavitatingflowincludingventilatedcavitationcausedbyairinjectionaswellasnaturalcavitationthatformsinaregionwherethepressureofliquidfallsbelowitsvaporpressure.Thetransportequationcavitatingmodelisapplied.ThecalculationsareexecutedbasedonasuiteofCFDcode.Thehyd...

简介：因为质地图象不能被单个象素的灰色的水平信息直接处理，我们建议反映在每个象素集中的补丁的紧张分发的一个新质地描述符。然后，Potts模型的一般多相的图象分割模型被增加质地描述符的区域信息为质地分割扩大。一个快数字计划基于裂口Bregman方法被设计加快计算过程。算法是有效的，并且质地描述符和典型函数能容易被实现。用合成质地图象，真实自然景色图象和合成的孔雷达图象的实验被介绍给在我们的方法和另外的最先进的技术之间的质的比较。结果证明我们的方法能精确地分割目标区域并且在分割自然图象特别与另外的方法相比是竞争的。

简介：Thephasetransformationcharacteristicsofahigh-strengthTRIP-aidedmultiphasecold-rolledsteelduringcontinuousheatingatdifferentcoolingrateswerestudiedbymeansofdilatometry,andthecriticaltemperatureswerealsodetermined.Thesampleswerefullyaustenitizedat1050℃andthencooledatdifferentcoolingratesrangingfrom0.5℃/sto100℃/s.Thecontinuouscoolingtransformation(CCT)curveswereobtainedfortheexperimentalsteel.Theexperimentalresultsshowedthatahighcoolingratedepressedtheformationofferriteandpearliteandpromotedtheformationofbainiteandmartensite,leadingtoahigherhardness.Alargeamountofmartensiteinhigh-strengthTRIP-aidedmultiphasecold-rolledsteelcanbeobtainedatcoolingratesinexcessof50℃/s.Theexperimentalresultsprovideguidelinesforcoolingcontrolandheattreatmentinrealsteelproduction.

简介：Thephase-fieldmethodhasemergedasthemethodofchoiceforthedescriptionofmicrostructureevolutionandphasetransitionsinmetallicmaterials.Followinggeneralthermodynamiclawsasetofevolutionequationsforthestructuralvariablesofthesystem,thesocalledphase-fields,arederived.Thepaperreviewsshortlythetheoreticalbackgroundofthemulti-phase-field.Differentexamplesdemonstratingtheapplicabilityofthemethodtotechnicalsteelswillbepresentedrangingfromdeformationofthedendriticstrandshellduringperitectictransformation,graingrowthinAustenitetostressdrivengrowthofPearlite.

简介：Influenceofthermo-mechanicalcontrolledprocessing(TMCP),includingtwo-stagerollingwithlaminarcooling,aircoolingandultra-fastcooling,onthemicrostructureandmechanicalpropertiesofthreekindsofNb-microalloeyedsteelswasinvestigatedbyhot-rollingexperiment.Effectofchemistrycompositionsandmicrostructureonmechanicalpropertiesandtherelationshipbetweenthemultiphasemicrostructure’sformationwithTMCPwereanalyzed.Theresultsshowedthatthemixedmicrostructurecontainingferrite,bainite,martensiteandasmallamountofretainedaustenitecanbeobtainedbythermo-mechanicalcontrolledprocessing.Size,quantityanddistributionoftheconstituents(ferritegrain,bainitepacketandM-Aislands)significantlyaffectthemechanicalpropertiesofthreekindsofNb-microalloyedsteels.UndertheconditionofsimilarTMCPparameters,thereisagraduallydecreasingtendencyintensilestrengthfromhighsiliconNbsteel,highsiliconNb-TisteeltolowsiliconNb-Tisteel,andanoppositetendencyintotalelongationandproductoftensilestrengthandductility.Totalelongationandproductoftensilestrengthandductilityreachthemaximumvalues(41%and25256MPa%respectively)forlowsiliconNb-Tisteel.

简介：Weproposeatwin-arraycapacitance(TAC)sensorforthemeasurementofconcentration,velocity,andflowrateofgas-solidtwo-phaseflow.Usingthesensitivitynon-uniformityofaneighboringelectrode,theregionalconcentrationofthecross-sectionwasreconstructeddirectly.Additionally,thefiniteelementmethodwasusedtoanalyzethecapacitanceofthesensorscomposedofadifferentnumberofelectrodes.TACsensorswith4,6,and8electrodeswerefoundtobethebestforregionalconcentrationmeasurements.Basedonthis,the8-electrodetwin-planeelectricalcapacitancetomography(ECT)sensor,the4-electrodeTACsensor,andthe6-electrodeTACsensorwereusedtomeasuretheconcentration,velocity,andflowrateofgranulesingranularflow.TheflowratesmeasuredbyECTandTACwerecomparedwiththeflowrateobtainedbyagravitysensortoverifythemeasurementaccuracy.Experimentsonverticalandinclinedpipelineswithgranularflowwerecarriedout.Wefoundthattheflowrateaccuracyofthe4-electrodeTACisdistinctlybetterthanthatofthe6-electrodeTACintheverticalpipelinewhiletheflowrateaccuracyofthe4-electrodeTACandthe6-electrodeTACweresimilarfortheinclinedpipeline.

简介：热卷的多相的钢的机械性质上的热变丑和随后的austempering的影响被调查。处理的Thermo机械的控制(TMCP)被使用一个实验室进行热滚动工厂完成卷减小的三种不同类型，和有我们重新申请的各种各样的等温的成立持续时间的austemperings。结果证明了由多角形的铁酸盐，小粒的巴菌体和大量稳定的保留的奥氏体组成的多相的微观结构能被卷过程控制获得。机械性质与因为保留的奥氏体的稳定，增加变丑的数量增加。最终的张力的力量(sigma_b)，全部的延伸(三角洲)和全部的延伸(sigma_b中心点三角洲)到达最大的价值(791MPa，36%和28476MPa百分比，分别地)在最佳的过程。

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简介：在这篇论文，我们考虑椭圆形的问题为第二份订单混合了有限元素方法。在最低顺序Brezzi-Douglas-Marini元素的情况中(如果d=2)orBrezzi-Douglas-Duran-Fortin元素(如果d=3)在矩形的平行六面体上，我们证明由合并某些照规则，混合方法系统能作为一个简单、以房间为中心的有限差别方法被写。这导致答案一稀少，positivesemidefinite为未知的数量的线性系统。为一个斜张肌系数，为未知的数量的稀少模式是五个点模板如果d=2，和七如果d=3。为一个一般张肌系数，它是九个点模板，并且十九分别地。是的混合方法实现的应用对的有限差别非等温多相，多，在多孔的媒介的部件流动被介绍。

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简介：UnderstandingthecomplexphenomenainBFhearthisessentialtoincreasefurnaceproductivityandtoextendfurnacecampaign.Wehavedevelopedseveralcontinuum-basedmathematical/numericalmodelstosimulatethemulti-phaseflow,heattransferandchemicalreactionsintheBFhearth.Thesemodelshavegeneratedanimprovedinsightonthemechanismsforliquiddrainageefficiency,liningerosionandwallprotectioninBFhearthunderoperationalconditions.Thecurrentpapergivesanoverviewofthesestudiesinthreeaspects:Gasflowandpressureontheliquidsurface,andtheireffectonthedrainagecharacteristics;TheflowandtemperaturedistributionsofliquidironinBFhearth,andthetemperaturedistributionintherefractories;Finally,titaniumbehaviorsduetotitaniainjectiontoformTi(C,N)-richscaffoldonthehearthsurface,toprotectthehearthfromerosion.

简介：Segmentationofthree-dimensional(3D)complicatedstructuresisofgreatimportanceformanyrealapplications.Inthisworkwecombinegraphcutminimizationmethodwithavariantofthelevelsetideafor3DsegmentationbasedontheMumford-Shahmodel.ComparedwiththetraditionalapproachforsolvingtheEuler-Lagrangeequationwedonotneedtosolveanypartialdifferentialequations.Instead,theminimumcutonaspecialdesignedgraphneedtobecomputed.Themethodistestedondatawithcomplicatedstructures.Itisratherstablewithrespecttoinitialvalueandthealgorithmisnearlyparameterfree.Experimentsshowthatitcansolvelargeproblemsmuchfasterthantraditionalapproaches.

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