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简介：SincethedesignstudiesofsolidtritiumbreederblanketmodelshavebeenperformedbyJapanandEUC,andtheirTBMdesignoptionsforITERhavebeenproposed.InordertodesignourTBMblanketoptionswithChineseresearchbasesandexperiences,wechoseliquidlithiumorlithium-leadasthetritiumbreedingmaterialsforourTBMblanketoptions.Howeverthethicknessoffirstwallisusuallyonlyafewcentimeters,

简介：华尔街是美国乃至全世界的金融、证券交易中心，已经成了垄断资本的代名词。但你知道它的过去和现在吗?

简介：ＲｅｎｏｖａｔｉｎｇｔｈｅＧｒｅａｔＷａｌｌＨＵＡＮＧＨＵＡＬＯＶＥＯＵＲＣｈｉｎｅｓｅＮａｔｉｏｎ，ＲｅｎｏｖａｔｅＯｕｒＧｌｏｒｉｏｕｓＧｒｅａｔＷａｌｌ：Ｔｈｉｓｓｌｏｇａｎ，ｐｕｔｏｕｔｂｙｔｈｅＢｅｉｊｉｎｇｐｒｅｓｓｉｎ１９８４，ｓｗｅｐ...

简介：SimWallisauser-friendly,stereotileddisplaywallsystemcomposedof18commodityprojectorsoperatedbyaLinuxgraphicscluster.Collaboratingtogether,theseprojectorsworkasasinglelogicaldisplaycapableofgivingahigh-resolutionshow,large-scale,andpassivestereoscene.Inordertoavoidtedioussystemsetupandmaintenance,software-basedautomaticgeometryandphotometriccalibrationareused.Thesoftwarecalibrationisintegratedtothesystemseamlesslybyanon-cardtransformmethodandistransparenttousers.Toend-users,SimWallworksjustasacommonPC,butprovidessupercomputing,renderinganddisplayingability.Inaddition,SimWallhasstereoscopicfunctionthatgivesusersasemi-immersiveexperienceinpolarizedpassiveway.Thispaperpresentssystemarchitecture,implementation,andothertechnicalissuessuchashardwareconstraints,projectorsalignment,geometryandphotometriccalibration,implementationofpassivestereo,anddevelopmentofoverallsoft-wareenvironment.

简介：ObjectiveToinvestigatetheadvantagesofcanalwallreconstruction(CWR)mastoidectomy,asingle-stagetechniqueforcholesteatomaremovalandposteriorexternalcanalwallreconstruction,overtheopenandclosedproceduresintermsofcholesteatomarecurrence.Methods:BetweenJune2002andDecember2005,38patients(40ears)withcholesteatomawereadmitedtoSunYat-SenMemorialHospitalandreceivedsurgicaltreatments.Ofthesepatients,25weremalewithagesrangingbetween11and60years(mean=31.6years)and13werefemalewithagesrangingbetween20and65years(mean=38.8years).Canalwallreconstruction(CWR)mastoidectomywasperformedin31earsandcanalwalldown(CWD)mastoidectomyin9ears.Conchacartilagewasusedforearcanalwallreconstructionin22ofthe31CWRproceduresandcorticalmastoidbonewasusedintheremaining9cases.ResultsAt0.5to4yearsfollowup,allbutonepatientsremainedfreeofsignsofcholesteatomarecurrence,i.e.,noretractionpocketorcholesteatomamatrix.Onepatient,asmoker,neededrevisionsurgeryduetocholesteatomarecurrence1.5yearaftertheinitialoperation.Therecurrenceratewastherefore3.2%(1/31).CholesteatomarecurrencewasmonitoredusingpostoperativeCTscanswheneverpossible.Inthecasethatneededarevisionprocedure,aretractionpocketwasidentifiedbyotoendoscopyintheparsflacidaareathateventuallyevolvedintoacholesteatoma.Apocketextendingtotheepitympanumfilledwithcholesteatomamatrixwasconfirmedduringtherevisionoperation,Adecisiontoperformamodifiedmastoidectomywasmadeasthepatientrefusedtoquitsmoking.Themeanair-bonegapinpuretonethresholdwas45dBbeforesurgeryand25dBafter(p<0.05).Therewasnodifferencebetweenusingconchacartilageandcorticalmastoidboneforthereconstructionregardingair-bonegapimprovement,CTfindingsandotoendoscopicresults.ConclusionCWRmastoidectomycanbeusedformostpatientswithacquiredmiddleearcholesteatoma,inc

简介：Thispaperintroducesthemainpointsofdesignandoperationfeaturesofacurvedcombinativebreakwaterwallwhichcannotonlyresiststormsurgebutalsorollwavebackandwhichhasthefunctionsofseawall,tideprotection,anti-wave,landdevelopment,trafficandtourism.ThenewkindofbreakwateroptimizedbywavemodeltesthasbeenutilizedintheseawallinthecoastregulationprojectinZhanjiangCity,andgoodresultshavebeenachieved.

简介：<正>JinShanlingisonthewayofaspectacular7milehiketotheincredibleknife-edgepeaksatSimatai.Fromeachwatch-tower(67aresaidtogracethissection)itisliketheGreatWallforthefirsttime.ItisaswayingcablebridgecrossestoSimatai.Atoptoursreachedthroughsteep,narrowstepsaremillion-dollarvistasofanendlessdragon’stail.Here,thewall

简介：ＡＴｒｉｐＡｌｏｎｇｔｈｅＧｒｅａｔＷａｌｌｓｔａｆｆｒｅｐｏｒｔｅｒＹＩＤＡＵＳ．ＡＳＴＲＯＮＡＵＴＮｅｉｌＡｒｍｓｔｒｏｎｇｃｌａｉｍｅｄｈｅｏｆＣｈｉｎａａｌｌｔｈｅｗａｙｆｒｏｍｏｕｔｅｒｓｐａｃｅｗｈｅｎｈｅｗａｓｏｎｈｉｓｗａｙｔｏｔｈｅ...

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简介：Street（华尔街）位于美国纽约市曼哈顿南端，西起百老汇的三一教堂，东到东河码头，是一条不到半英里长的弯曲街道。

简介：ＴｈｅＧｒｅａｔＷａｌｌａｎｄＣｈｉｎａ＇ｓＮａｔｉｏｎａｌｉｔｉｅｓＬＩＦＥＮＧＳＨＡＮＴｈｅＧｒｅａｔＷａｌｌ，Ｃｈｉｎａ＇ｓＭａｇｉｎｏｔＬｉｎｅｔｏｍａｎｙ，ｗａｓｍｏｒｅｌｉｋｅａｒｉｖｅｒｔｈａｎａｂａｒｒｉｅｒ．ＲｉｖｅｒｓＥｔｈｎｉｃ...

简介：Thewater-conductingnetworkofcapillariesinvascularplantshasevolvedoverhundredsofmillionsofyearsinordertobeabletocopewithbubbleclogging,aproblemwhichalsoaffectsmodernmicrofluidicdevices.Decadesofanatomicalstudieshaverevealedthatplantsgrowinginhabitatsinwhichtheformationofbubbles,oremboli,islikelytobeafrequentoccurrenceoftenhavevariousformsofgeometricalsculpturingontheinternalsurfacesofthexylemconduits.Thepossiblefunctionofsuchwallsculpturinghaslongbeenthesubjectofspeculation.Wehaveinvestigatedthehypothesisthatwallsculpturingisafunctionaladaptationdesignedtoincreasethewettabilityofthewallsofxylemconduits,aneffectwhichcouldbedescribedastheinverseofthewell-knownlotus-effect.Ourresultsshowthatwallsculpturingdoesenhancewettability.Importantly,theoreticalcalculationsrevealthatthegeometricparametersofvarioustypesofwallsculpturingaresuchthattheresultingsurfacesaresufficientlyroughtoenhancewettability,butnotsignificantlyrougher.Theresultsprovideanappealinganswertothelong-standingdebateonthefunctionofwallsculpturinginxylemconduits,andmayprovidebiomimeticcluesfornewapproachestotheremovalofbubblesinmicrofluidicchannels.

简介：Thecharacteristicsofalaminarwalljetsubmittedtodifferentconfigurationshavebeenexperimentallyexploredinordertoobtainabetterknowledgeoftransitionmodifications,Infactdifferentparameterscanaccelerateordelaythetransitionusingasmoothorroughsurface,heatedornot,submittedtovibrationsornot.Inthisstudy,significanteffectscanbenoticed.Ithasbeenpossibletomeasurethebeginningofgrowthratesofdisturbanceamplitudeusingawindtunnelandcomparingtheresultswiththelinearstabilitytheory.

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简介：Theinstabilityofboreholewallisalwaysadifficultquestionindrillingboreholeprogress.Itincreasesthecostofproductionandprolongsproductioncycle.Soithasasignificantresearchvalue.Consideringtheeffectofmudpressureandporepressureonthestabilityofboreholewall,thispaperestablishesamathmodelbyapplyingthetwo-dimensionalbondtheoryofBiot.Itappliesthemethodofthenumericalsimulationtoanalyzetheeffectofmudpressureandporepressureonthestabilityofboreholewall.Thesimulationresultsshowthatthemudpressureimposesgreatinfluenceonstressfieldandonthedeformationofboreholesoil,whichprovidesatheoreticalbasisduringthedrillingprocesstoavoidtheinstabilityoftheboreholeandtostudyhowtoselectreasonablemudandmudpressure.

简介：SmallX-rayScattering(SAXS)experimentusingSynchrotronRadiationasX-raysourcewasusedtodeterminetheaveragewallthicknessofmesoporoussilicaprepardbycondensationoftetraethylorthosilicate(TEOS)usingnon-ionicalkylpolyethyleneoxide(AEO9)surfactantastemplates.Theresultsagreedwiththatofhigh-resolutionTEM(HRTEM)measurement.

简介：Infusionreactordesign,firstwallisonekindofplasma-facingcomponents(PFCs),whichwillbeirradiatedbyhighenergyneutronsandotherparticle,aswellasworkunderhighplasmaheatflux.Theyshouldbeconsideredcarefully.Manyexperimentsand

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