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简介：Theoreticalbeamintensitydistributionisderivedfortheneutral-beam-injectionionsourcewithamulti-slotextractioninEAST.Thebeamintensityprofile,bothalongandperpendiculartotheinjectingdirectionandthebeampowerdepositiontotheinnerelementsintheneutralbeaminjector(NBI)areevaluated.Theresultsindicatethatthetransversebeamintensityismuchhigherthanthelongitudinalone.Thisstudycouldprovideinformationforthedesignofvacuumsystem,structureofinnerelementsandcoolingsystemoftheneutralbeaminjectorinEAST.

简介：TooptimizetheoperationparametersofthebeamlineofNBIonHL-2A,featuresofthebeamline,includingthebeamprofileandthepowerdepositedoncomponentsandinjectedintothetokamakplasma,weremeasured.Theoperationalparametersofthefoursourcesonthebeamlinewereoptimizedwiththemonitorofthebeamprofileandbeampower,andthetransmissionefficiencyoftheNBIinjectedpowerwasthereforeincreased.AbeamdiagnosticsystemforthebeamlineoftheNBIsystemonHL-2Aaswellasthediagnosedresultswasalsopresented.

简介：我们采用EEG、BEAM和CT检查方法,对临床诊断为脑震荡的患者进行脑功能、脑形态学的检查,现对比分析如下.

简介：ＢｅａｍＭｏｄｕｌａｔｏｒｏｆＰｈｏｔｏｅｌｅｃｔｒｉｃＰｕｌｓｅ￥ＧｕＺｈｏｎｇｄａｏ；ＷａｎｇＷｅｉａｎｄＤｏｎｇＣｈｅｎｇｆｕＴｈｅｅｘｐｌｏｒａｔｉｏｎｏｆｎｕｃｌｉｄｅｆａｒｆｒｏｍｔｉｌｅβｓｔａｂｉｌｉｔｙｌｉｎｅ（ｅｘｏｔｉｃ...

简介：ＢｅａｍＤｉａｇｎｏｓｔｉｃＳｙｓｔｅｍｆｏｒＳＦＣ￥ＳｏｎｇＨａｉｈｏｎｇＴｈｅｄｉａｇｎｏｓｔｉｃｄｅｖｉｃｅｓｆｏｒｔｈｅｉｎｊｅｃｔｏｒＳＦＣｉｎｃｌｕｄｅ３ｍｏｖａｂｌｅｒａｄｉａｌｐｒｏｂｅｓｗｉｔｈ１０ｄｉｆｆｅｒｅｎｔｉａｌａｎｄｉｎ...

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简介：Neutralbeaminjection(NBI)isrecognizedasoneofthemosteffectivemeansforplasmaheating.A100slongpulseneutralbeamwith30keVbeamenergy,10Abeamcurrentanda100slongpulsemodulatingneutralbeamwith50keVbeamenergy,16AbeamcurrentwereachievedintheEASTneutralbeaminjectoronthetest-stand.ThepreliminaryresultssuggestthatEAST-NBIsysteminitiallypossesstheabilityoflongpulsebeamextraction.

简介：脑梗死是严重危害人类健康的脑血管病之一,早期诊断和早期防治是降低致残率和死亡率的关键.现将我院2000年1月～2001年8月收治的急性脑梗死患者于发病后72小时内经脑电图(EEG)、脑地形图(BEAM)、X线计算机断层扫描(CT)和核磁共振(MRI)检查的43例患者作对照分析,探讨EEG/BEAM对脑梗死的早期诊断价值.现报告如下.

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简介：ＲａｄｉｏａｃｔｉｖｅＩｏｎＢｅａｍＬｉｎｅｉｎＬａｎｚｈｏｕ￥ＺｈａｎＷｅｎｌｏｎｇ；ＧｕｏＺｈｏｎｇｙａｎ；ＬｉｕＧｕａｎｈｕａ；ＹｉｎＱｕａｎｍｉｎ；ＺｈｏｕＪｉａｎｑｕｎａｎｄＷａｎｇＹｉｆａｎｇＡｓａｎｅｗｆｒｏｎｔｉｅｒｉｎｎｕ...

简介：在在10年的放射性的同位素横梁工厂的核物理学的研究活动被考察，未来方向也被讨论。在象试验性的设备一样设计设备的概念的想法被介绍。特殊强调被给在RIBF获得的加亮的结果。

简介：Inordertosolvetheproblemofhighprecision,completeelectricinsulatingdetectionofthepressuremeasuringsystem,wehavedevelopedthethree-beaminterferometer.Inthispaper,theoperationprinciple,structureofthesystemandmeasuringresultsaregiven.

简介：Thedynamicresponseofthenon-linearelasticsimplysupportedbeamsubjectedtoaxialforcesandtransverseperiodicloadisstudied.Melnikovmethodisusedtoconsiderthedynamicbehav-iorofthesystemwhosepost-bucklingpathissteady.Theeffectofthehigherordertermsinthecon-trollingequationistakenintoaccount.Itisfoundthatthefifth-ordertermshaveagreatinfluenceonthedynamicbehaviorofthesystem.Theresultshowsthatthereexisteitherhomoclinicorbitsorhete-roclinicorbitsinthesystem.Inthispaper,thecriticalvaluesofthesystementeringchaoticstatesaregiven.Thediagramofanexampleisshown.

简介：Wededuceacompletewavepropagationequationthatincludesinhomogeneityofthedielectricconstantandpresentthispropagationequationincompactvectorform.Althoughsimilarequationsareknowninnarrowfieldssuchasradiowavepropagationintheionosphereandelectromagneticandacousticwavepropagationinstratifiedmedia,wedevelophereanovelapproachofusingsuchequationsinthemodelingoflaserbeampropagationinnonlinearmedia.Ourapproachsatisfiesthecorrespondenceprinciplesinceinthelimitofzero-lengthwavelengthitreducesfromphysicaltogeometricaloptics.

简介：Inthispaper,theboundarystabiligstionoftbeTimoshenkoequationofanononiformbeam,withclarrmpedboundaryconditionatoneendandwitbbendingmomentandshearforcecontrolsattheotherend,isconsidered.Itisprovedthatthesystemisexponentiallystahilizablewhenthebendingmomentandshearforcecontrolsaresimultaneouslyappiied.Thefrequencydomainmethodandthemultipliertechniqueareused.

简介：Thedynamicresponseofastrain-softeningbeamsubjectedtoatransverseimpulsiveonitstipisinvestigated.Asofteningmoment-curvaturerelationisassumedforthebeamandaclosedformsolutionisobtainedforaspecialkindofload,whichshowsthatthereexistsasofteningregioninthebeamandthisre-gionpropagatesalongthebeam.Thisresultindicatesthat,exceptforthepossiblediscretesofteningpointswithrotationdiscontinuitycausedbythedeformationlocalization,theexistenceofthesofteningregionanditstravellingalongthebeamaretheessentialfeaturesofthedynamicresponseofastrain-softeningbeam.Theresultsalsoshowthatthefailureofthebeamshouldtakeplaceunderaspecialloadandthecriticalconditiononwhichthedynamicfailureoccursisgiven.

简介：Thequasi-conformingelementofthecurvedbeamandshallowcurvedbeamisgiveninthispaper.Numericalexamplesillustratethatthequasi-conformingelementsofthecurvedbeamandshallowcurvedbeamWhichisusedtoaooroximatethecurvedbeamhavebetteraccuracythanthestraightbeamelement.Thecurvedbeamelementconstructedbydisplacementmethodcannotsatislyrigidbodymotionconditionandthevervfinegridshavetobeusedinordertosatisfyrigidbodymotionconditionapproximately.Inthispaperitisprovedthatthestraightbeamelementandthequasi-conformingelementofthecurvedbeamandshallowcurvedbeam.whenelementsizeisreducedinfinitely,haveconvergenceratewiththesameorderO(l~2)andwhenregulurelementsareused,Iistheelementlength.

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简介：OfconcernisaviscoelasticbeammodelledusingtheTimoshenkotheory.Itiswell-knownthatthesystemisexponentiallystableifthekernelinthememorytermissub-exponential.Thatis,iftheproductofthekernelwithanexponentialfunctionisasummablefunction.Inthisarticleweaddressthequestions:Whatifthekernelistestedagainstadifferentfunction(sayGamma)otherthantheexponentialfunction?Wouldtherestillbestability?Intheaffirmative,whatkindofdecayrateweget?Itisprovedthatforanon-decreasingfunction'Gamma'whose'logarithmicderivative'isdecreasingtozerowehaveadecayoforderGammatosomepowerandinthecaseitdecreasestoadifferentvaluethanzerothenthedecayisexponential.