简介：Althoughin-situgrowingcarbonnanotubes(CNTs)oncarbonfiberscouldgreatlyincreasethematrix-dominatedmechanicalpropertiesofcarbon/carboncomposites(C/Cs),italwaysdecreasedthetensilestrengthofcarbonfibers.Inthiswork,CNTswereintroducedintounidirectionalcarbonfiber(CF)preformsbyelectrophoreticdeposition(EPD)andtheywereusedtoreinforceC/Cs.EffectsofthecontentofCNTsintroducedbyEPDontensilepropertyofunidirectionalC/Cswereinvestigated.ResultsdemonstratedthatEPDcouldbeusedasasimpleandefficientmethodtofabricatecarbonnanotubereinforcedC/Cs(CNT—C/Cs)withexcellenttensilestrength,whichpaysameaningfulwaytomaximizetheglobalperformanceofCNT—C/Cs.

简介：BackgroundAnimalmodelsofmyocardialinfarction(MI)havebeenwidelyusedtostudythepathologicalandphysiologicalchangesthatoccurinMI,andtoobjectivelyevaluatetheefficacyofnewtreatments.Theyareanimportanttoolinthisprocedure.However,themortalityrateofMIanimalmodelshassofarbeenhigherthaninreal-lifesituations.Theaimofthisstudywastoexploretheuseofamodifiedretrogradetractiontrachealintubation(MRTI)methodforincreasingthesuccessrateofMImodelsinrats.MethodsSixtymaleSprague-Dawleyratswereusedintheexperiment.UsingtheMRTImethodofartificialairwaygeneration,weestablishedtheMImodelbyligationoftheleftanteriordescendingbranchofthecoronaryartery.WeanalyzedtheeffectsofMRTI,theuseoflidocaine,operativedetails,nursingconsiderationsduringtheoperation,andpost-operativefactorsonthesuccessrateoftheMImodelinrats.ResultsThesuccessrateofgeneratinganMImodelinratscanbesignificantlyincreasedusingthefollowingmethods:1)SettinguptheartificialairwaythroughtheuseofMRTIbyusingasingle-lumencentralvenouscatheter;2)Selectingaligationsite2mmbelowthemidpointoftheconnectionbetweentheleftatrialappendageandthepulmonarycone;3)Addingadropoflidocainetothesurfaceofthehearttoslowdowntheheartrate,maketheoperationeasiertoperform,andpreventarrhythmiaspostoperatively;4)Clearingupairwaysecretionstimelybothintraandpostoperatively;5)Makingsurethatratsareinawarmstatebothintraandpostoperatively;6)Preventingwoundinfection.ConclusionsUseoftheMRTImethodcanquicklyestablishanartificialairwayinrats.Intraoperativeuseoflidocaine,selectingaprecisevascularligationsite,andappropriatecarebothintraandpostoperativelycanincreasethesuccessrateofMImodelgeneration.更多还原

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简介：Thedirectrollingprocessforhotstripproduction,wherethethinslabcasterisconnecteddirectlytothemill,hasgainedmarketsharerapidlybecauseofitsremarkableadvantagesintermsofenergysavingsandinvestmentcostovertheconventionalhotstripmills.However,theunquestionableadvantagesofthefirst-generationapplicationsofthisplantconceptalsoentailsignificantlimitationsbothinproductivityandsteelgradesthatcanbeproduced.Sincehisfirstpioneeringapplications,Danieliconsideredstrategicthedevelopmentofnewtechnicalsolutionsspecificallyconceivedtoovercometheselimitationswiththegoalofincreasingplantproductionvolumesandenlargingsteelgradeproductmix,inordertocoverthegapbetween'Conventionalmill'and'Thinslabcastingandrolling'processroutes.Inordertoreachthisgoal,DanielihasdevelopedacompleteportfolioofplantlayoutsadoptingThinSlabCastingandRollingtechnologies,eachofthemconceivedtoguaranteetheoptimalCAPEXandOPEXparametersinfittingwithmarketrequirementsourCustomerintendtotarget.intermsofproductivity,steelgradesandcoildimensionproductmix.DanieliTSR(ThinSlabRolling)fTSR(flexibleThinsSlabRolling)QSP(QualityStripProduction)andETR(ExtraThinRolling)plantconfigurationsareanalyzedinthispaper.Withthisdiversifiedapproach,Danielisolutionsaremostappropriateanswerstothinslabcastingandrollingtoproducehotrolledcoilswithsuperiorqualityandanextremelydiversifiedrangeofsteelgrades.Already,thisapproachhasallowedDanieliplantsto:①exceedthethresholdproductionof3.0Mt/awith2castingstrandsinoperationasdoneinTangshanIronandSteelplantinP.R.Chinasince2005;②expandtheproductmixtoincludevirtuallyallthesteelgradesusedforflatproductapplications,includingthemostdemandingones,suchasperitectic(inEssarAlgomaCanadaandBenxiIronandSteel,China),micro-alloyed,andsiliconsteels,forthemostsophisticatedapplications,

简介：thedifferencebetweenChinesecultureandAmericancultureresultsfromtheirdifferentsocialstructures.ThebasisofAmericansocialstructureisindividualwhilethebasisofChinesesocialstructureisfamily.Therefore,I’minterestedintheaspectoffamilyrelationship.SoIchoosefourpassagesaboutfamilyrelationshipandmakeacomparisonbetweenAmericaandChinatolearnmoreculturegap.Thecomparisonreferstothefamilystructure,TheinfluenceoffamilyeducationleadtotheChineseeducationbecomeateacher-orientatedaswellaspassive