简介：Sincetheexcessivecapacityinsteelmakingandcontinuouscastingatpresent,andthelimiteddevelopmentmarginofCCtechnologyandequipmentinscale,thefurtherdevelopmentmustbemadeinaprofoundanddetailizedway.ThispaperenumeratestheitemsofCCtechnologyandequipment,whichneedtobedetailizedfromseveralaspectssuchasrollarrangementdesign,equipmentdesignandproductionoperation,anditpointsoutthatdetailizationisthefuturedirectionofCCtechnologyandequipment.Theitemsinrollarrangementdesignincludeeliminatingperiodicmeniscusfluctuationbyadjustingspacebetweenrollsreasonably;takingspecialmeasurestoavoiddangerousregionsofcastingspeed,inordertoreducethecenterporosityandcenterlinecrackofslab;optimizingthemajorradiusandthelengthofouterarcofcasterbeforestraighteningpointtoavoiddangerousregionofcastingspeed.Theitemsinequipmentdesignincludechoosingasuitablestructureofsupportandguidingrollaccordingtotheconcreteconditionsofcaster;accordingtobulgingshapeofslab,thinkingmoreaboutrestrictionofshelltobulgingforce,discussingtheforceonrollers,optimizingsplitrolltosupportslab;safetyfactorshouldbeconsideredtogetherwithcalculationmethodofthebearingnominalstaticload.Theitemsinaspectsofcontinuouscastingoperationincludethedelicacydivisionandthefunction-positioningofoperationmodesforCCmachineduetotheconsiderationofdynamicsoftreduction;monitoringandcontrollingsystemofCCmachinemustbefurtherdetailizedtoimprovethestabilityofproductionoperationandslabquality.Inadditiontothethreeaspectsmentionedabove,thisarticlepointsoutmanyotheritemsalso,suchashomogenizationofsecondarycoolingofslab,qualitycontrolofsurfaceandinternalofslab,andsoon.Thisarticleemphasizes,somekeytechnologiesneedtoberesearchedalso,andalltheseresearcheswillneverstop.

简介：Havingawiderangeofmotion,thecervicalspineisratherpredisposedtotrau-maandotherdisorderswithseriousconsequences.Themotionofcervicalspineisacomplexonecomposedofmicromotions,includinghorizontaldisplacementsalongallthreeaxesandrotationsaroundthemwithsixfreedomdegreesofmovement.Reportonprecisemeasurementofthethree-dimensionalmotionofthecervicalsectionof

简介：ImagegeometrydistortionisanimportanttechnicalstandardinB-modeultra-sounddiagnosissystem.ThispaperinvestigatesthecauseofimagedistortioninphasedarrayB-modeultrasounddiagnosissystem.Thefirstdistortioncauseisthedelayerrorofcompoundwavebind.Phasedarrayultrasoundtranduceriscomposedofmanyrectangleunits.Withcontrollinginspiringplustime,ultrasoundwave

简介：Bodysurfacepotentialmapping(BSPM)isarecentlydevelopednoninvisivecar-dioelectrophysiologicdiagnostictechnique.Thepurposeofthepresentstudyistoe-valuatetheefficacyandsignificanceofpercutaneoustransluminalcoronaryangioplas-ty(PTCA)usingaBSPM-Ⅲmodelcomputersystem.7patientswitheoronaryheartdiseasewerestudiedpriortoandfollowingPTCAusing98leadsBSPMwithspecial

简介：Fortheestablishmentofdirectrevascularicationoftheischemicmyocardium,aNd:YAGlaserwithawavelengthof1060nmandanopiticfiberdiameterof500umwasusedtocreate20to25transmuralchannelsinthecentralischemicregionoftheleftventricleafterthecoronarywasligatured.Thechannelswerecreatedfromtheepicard1alsurfacetotheendocardiumandeachchannelreceivedabout64joulesofthe

简介：Diastemaoftenoccuredinmaxillarycompletedentureresinbaseintheclinic,although"Lucitone199"hadbeenusedwithmoretensilestrength.Mechanicalex-perimentshaveprovedthehightransversetensilestress(σ_x~+)concentratinginanteri-orteethregionandtheirpalatalsurfaceofmaxillarycompletedentureresinbasewhileitwasexposedtoverticalloadingincenterocclusion.Settingstrengtheningnetinresinbasehasachievedbetterresults.Forevaluatingpurpose,twentykinds

简介：Reasonabledenturedesignwillaffectthehealthoforalsupportingtissueandrelatetothesuccessandfailureofprosthodontic.Inordertoinvestigatethestressdistributeoforalsupportingtissueswiththreevariousdesignsunderconditionsofverticalloading,wemeasuredthemodelofthelossoflowerfirstmolarwith3-Dco-ordinatemeasuringapparatus,anddidanaloguedenturedesignwithauto-CADsoft-waresystemincomputer.AllmodelswereanalyzedwithSuper-SAPfiniteelementprogram.Ineachcase,150Nverticalloadingwasappliedonthesecondpremolar,

简介：Theexperimentalstudywasperformedin78rabbits,theexposedanteriorven-tricularsurfaceoftheopen—chestrabbitswereimpactedwithapendulum—likemovementimpactorsystemwhichwascontrolledbytheCardiaccycle.Undrsomegivenconditions,theexperimentalresultswereasfollows:（1）Theimpactsat5.0m·s-1resultedinnocardiacruptureinallattemps（16/16）attheendofsystoleas

简介：Poly(methylmethacrylate)(PMMA),usedasdenturebasematerialsinden-tistry,hassomeinherentdefects,suchaslowertoughnessorhigherbrittlenesswhichisoneofthemainreasonsofthefractureofdenturebaseinclinical.Therefore,manyscientistshavefocusedonhighimpactstrengthdenturebasematerials.Inthispa-per,usingMethylmethacrylate-butadiene-styrene(MBS)asareinforcementagent,

简介：Bonemorphogeneticprotein(BMP)isanefficientbone-inducingproteinwhichmainlyexistsinbonematrix.TheimplantsofBovineBMP(bBMP)extractedfrombovinebonematrixcaninducedifferentiationofmesenchymalcellsofmicemusclein-tochondroandosteo-cytesandformnewbonefurther.Inordertoevaluateim-plantablebiomaterialthatpossessesnotonlyosteogenicability,butalsostengtn,

简介：TotesttheosteoinductiveactivityoftheRBXdevelopedbyus,eightdifferentdoses(4,2,1,0.5,0.25,0.125,0.075,and0.0325milligrams)ofbovinebonemorpho-geneticprotein(bBMP)wereselectedonthebasisoftheresultsofectopicassaysandwerereconstitutedwithtenmilligramsoftheantigen-extracted,partialdecalcifiedcalfcancellonsbonewhichservedasacarrierforthebBMP.Theywereimplantedin

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