简介：ThispaperreportsastudyofcomplexfocussingacousticfieldsofaconvexphasedarrayprobewidelyusedinultrasonicdiagnosticB-scanner.Thetimedelaynecessaryforelectronicfocussingandforgeometricfocussingofcomplexfocussingisgiven.BymeansofHelmholtz‘sintegralformula,theexpressionsofacousticfieldswereobtainedfortheelectronicfocussingandcomplexfocussing.Withsimpson‘snumericalintegral,agreatdealofcomputationswascarriedoutwithan86/330computer.Bymeansofusingdifferentparameters,anoptimumfocalrangeandbeamwidthofa4sequenceselectronicandcomplexfocussingacousticsystemwasselected.WithanEUB-40ultrasounddiagnosticB-scannerproducedbytheHitachicompany,thelateralfocussingacousticfieldandlateralresolutioninanechoictankwerephotographedbylatticingmethodandtheexperimentalresultiscon-sistentwiththetheory.

简介：Leadisoneofthepoisonoustraceelementforhumanbody.Itisimportanttofindawayformeasuringcontentoflead.Deterninationofleadbyelectrochemistryisoneofamethod[1].Inthispaper,leadisdeterminedbysingle-sweeppolarography.Theabsorptionbehaviorofmeso-tetra(4-sulfonylphenyl)porphyrin(H2TPPS4)complexwithleadionhasalsobeenstudied.InNa2B4O7-NaOHsolutionwithpH=l0.5,thereductionpeaksoftheligandareP1(Ep1=-0.38V),P2(Ep2=-1.04V),whichpotentialsareobtainedvs.S.C.E.Whenleadionhasbeenaddedintoabovesolution.ThepeakcurrentofP1andP2decrease,andanewreductionpeakP3(Ep3=-1.10V)appears.ItshowsthattheTPPS4-Pb(Ⅱ)complexforms,andthismethodcanbeappliedtostudythecomplex.

简介：ElectrochemicalBettednotonlycanobtaintheconductingfilmofpolyanilineonaglasscarbonelectrode,butalsocanimobilizePMo12O403-inthefilmtoformaorganicconductingfilmelectrodemodifiedbyheteropolyanion.ThepaperherereportselectrochemicalchangesinthepreparationofPMo12O403--polyanilinemodifiedelectrode,theelectrochemicalreactionmechanismofthemodifiedelectrodewasobtainedfromthestudyonitsredoxproperties.Moreover,theaboveelectrodeshowedmarkedelectrocatalysisforthereductionreactionofCIO?-.

简介：ＢｅａｍＤｉａｇｎｏｓｔｉｃＳｙｓｔｅｍｆｏｒＳＦＣ￥ＳｏｎｇＨａｉｈｏｎｇＴｈｅｄｉａｇｎｏｓｔｉｃｄｅｖｉｃｅｓｆｏｒｔｈｅｉｎｊｅｃｔｏｒＳＦＣｉｎｃｌｕｄｅ３ｍｏｖａｂｌｅｒａｄｉａｌｐｒｏｂｅｓｗｉｔｈ１０ｄｉｆｆｅｒｅｎｔｉａｌａｎｄｉｎ...

简介：ＰｒｏｐｅｒｔｉｅｓｏｆＮｕｃｌｅｉｉｎＬｅａｄＲｅｇｉｏｎ￥ＧｕＪｉｎｎａｎａｎｄＺｈａｎｇＣｈａｎｇｈｕａＴｈｅｓｔｒｕｃｔｕｒｅｏｆｔｈｅｎｕｃｌｅｉｉｎｔｈｅｖｉｃｉｎｉｔｙｏｆ２０８Ｐｂｈａｖｅｂｅｃｏｍｅｏｆｇｒｅａｔｅｘｐｅｒ...

简介：HL-2Atokamakisthefirstnon-circularcross-sectiontokamakwithdivertorinChina.ApartfromboundarytransportandSOLstudy,theHL-2AmajorsubjectistoinvestigatetheimprovementofconfinementwithhighparametersandalotoffrontphysicsandrelevantengineeringtechniquesbyuseofitsspecialCloseddivertorwithlargevolumeinChina.

简介：Thephenomenonofparticleinteractioninvolvedinpulmonarydrugdeliverybelongstoawidevarietyofdisciplinesofparticletechnology,inparticular,fluidization.Thispaperreviewsthebasicconceptsofpulmonarydrugdeliverywithreferencestofluidizationresearch,inparticular,studiesonGeldartgroupCpowders.Drypowderinhalerdevice-formulationcombinationhasbeenshowntobeaneffectivemethodfordeliveringdrugstothelungfortreatmentofasthma,chronicobstructivepulmonarydiseaseandcysticfibrosis.Evenwithadvanceddesigns,however,deliveryefficiencyisstillpoormainlyduetopowderdispersionproblemswhichcausepoorlungdepositionandhighdosevariability.Drugparticlesusedincurrentinhalersmustbe1-5mindiameterforeffectivedepositioninsmall-diameterairwaysandalveoli.Thesepowdersareverycohesive,havepoorflowability,andaredifficulttodisperseintoaerosolduetocohesionarisingfromvanderWaalsattraction.Theseproblemsarewellknowninfluidizationresearch,muchofwhichishighlyrelevanttopulmonarydrugdelivery.

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简介：TheconcernoveroutliersisoldsinceBernoulli(see[12]),reviewedhistoricallyby[11]andupdatedwith[10]intheirencyclopediatextbook.Jamesetal.[46]usedsimulationtechniquetocomparesomerecentpublishedoutlierdetectionprocedures.Thehistoryofadeptanddiagnosisofoutliersistracedfromoldandpresencecomments.Theil-typeorRank,Brown-Mood,Lp,M,adaptiveM,GM,andTrimmed-Winsorizationestimatorsarethemostpopularestimatorsthatwewillreviewinthispaperasanapplicationtooutlieraccommodation.Wewillreviewandcomparethemostnumericalandgraphicaldisplaysbasedonresidualstoflagoutliers.

简介：Thisarticlebringsupsomeexplanationsandclarificationsabouttwicedepositionofleadiodidewritteninthepreviousarticle[1],afterlookingintothetwicedepositionofleadiodideandcarryingontheimprovingbyalayerofPbBr2insteadofPbI2,theshortcircuitcurrentdensity(Jsc)hasdecreased,allowingtoexplainthetwicedepositionis,infact,onedeposition.Theabsorbanceofperovskitewillbediscussed.Thesubstratetemperatureisthemostimportantparameterbecauseitcanimprovetheefficiencyoftheperovskitesolarcells,thesubstratetemperatureshouldbeabout100°Catthedepositionofleadiodide,andwhenthedepositionofmethylammoniumiodideisdonewhenthesubstrateisstillhot,theefficiencyisalsoimproved.Thetemperatureduringthepreparationislessimportantthanthehumidity,butthepreparationinthegloveboxallowsthattheenvironmentalconditionsbecontrolled.

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简介：SufficientconditionsweregiventoassertthatbetweenanytwoBanachspacesoverK,Fredholmmappingsshareatleastonevalueinaspecificopenball.Theproofoftheresultisconstructiveandbaseduponcontinuationmethods.

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简介：Hightemperaturesuprerconductor(HTS)currentleadhasanadvantageinreducingelectricpowerconsumptionofarefrigeratorforalargecurrentsuperconductingmagnetsystemsuchasafusiondevice.Afusiondevicerequiresmorethan20pairsoflargecurrentleadsandeachcurrentcapacityisabout60kA.Theconventional60kAcurrentleadneeds100kWelectricpowerforrefrigerationanda2/3reductionisavailablebytheapplicationofaHTScurrentlead.

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简介：ＭＥＡＮＶＡＬＵＥＯＦＡＮＡＬＹＴＩＣＯＰＥＲＡＴＯＲＦＵＮＣＴＩＯＮＳＹｕＸｉａｏｐｅｉ（喻小培）（Ｄｅｐｔ．ｏｆＭａｔｈ．，ＣｅｎｔｒａｌＣｈｉｎａＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ，Ｗｕｈａｎ４３００７０，Ｃｈｉｎａ）ＪｉａｎＭｉｎｇ（蹇明）（Ｄ...

简介：Inthispaper,wewillintroducesomeproblemsandresultsbetweenDiophantineapproximationandvaluedistributiontheol.

简介：Varioussteadymodelsforinteractionbetweenheartandarterialsystemhavebeengiveninliter-ature,Inourrecentstudy,adynamicprinciple,i.e.theprincipleofleastcardiacworkisproposed,andady-namicmodelforinteractionofheartandarterialsystemisestablished.Preliminaryresultsofourexperimentsshowthatboththeprincipleandthemodelareconsistentwiththephysiologicalphenomena.Itrevealsthatthepres-entanalysismayofferanewmeasureforthestudyofdynamicprocessofinteractionbetweenheartandarterialsystem.