简介：Thefissionchamberswhicharegascounterswithfissilematerialinsidechamber,provideessentialinformationforplasmaopcharacteristics.Inconjunctionwiththeneutronfluxmonitorsystemtheseprovidetime-resolvedmeasurementsoftheglobalneutronsourcestrengthandfusionpowerfromthermalnuclearfusionreactorasITERforallplasmaconditionsforwhichneutronsareproduced.

简介：Inordertoidentifyheavierelements,wehavedevelopedanewlongitudinalfieldgasionizationchamber(IC)withanangleof30°ofplate(asshowninFig.1).TheICisoperatedinflowingiso-butanegasatapressureof10kPa.Aftertestingbyusinga3-componentαparticlesourceandcomparingwiththeoldlongitudinalfield

简介：ThesiteofPagodaLeifeng雷峰referstothedepositedruinsofPagodaLeifengafteritscollapseonSeptember25,1924.Itislocatedonthesmoothhill,eastofHillXizhao夕照山,tothesouthoftheWestLakeinHangzhou杭州.Itis60mlongfromnorthtosouthand45mwidefromeasttowest,9-11maboveground.In1997ZhejiangProvincialgovernmentdeclareditasonearchaeologicalsiteunderprovincialprotection.

简介：Anechoicchambersareusedforindoorantennameasurements.Thecommonmethodofconstructingananechoicchamberistocoverallinsidewallsbytheelectromagneticabsorbers.Inthispaper,afullymetallicsphericalchamberstructureispresentedinwhichthepropagationoftheelectromagneticwavesinsidethechamberiscontrolledandtheyareguidedtoanabsorber.Intheproposedmethod,anappropriatequietzoneisobtained,andunlikeordinaryanechoicchambers,theabsorberusageamountisreducedgreatly.Theperformanceofthechamberisevaluatedbysimulation.Theresultsshowthattheproposedmethodcouldprovideausefultechniquefortheindoorantennameasurements.

简介：Abidispersegranularmixtureinaslightlytiltedcompartmentalizedchamberisexperimentallyfoundtoshowsizesegregationwhenverticallyvibrated.Asurfaceslopedevelopsandlargeparticlescongregatetothelowerside.Particlesrightupontheuppertipofthedividingwallbehaveinacompetitiveway,i.e.,theycangotoeithercompartmentdependingontheforceexertedonthem.

简介：Akindofdryrefractorysealingmaterialhasbeendevelopedtorepairthefinecracksincokeovenchamber.Withsilicasandasthemainrawmaterial,thesealingmaterialisblownintocokeovenchamberbycompressedairwhilebeingapplied,andbondedtobricksurfaceorfilledinfinecracksofchamberunderrightpressure.Thephysicalpropertiesofthematerialaresimilartothoseofsilicabricksduringitsapplication.Soitcanbeadaptedtoconditionsofcokeovenandhasgoodservicelife.Thestudyandapplicationresultsofthesealingmaterialaredescribedinthispaper.

简介：DearEditor,Adenocarcinomaofthenonpigmentedciliaryepithelium(NPCE)isararemalignanttumorwhichisnoteasytobefoundintheearlystage~([1]).Herein,wereportacaseofadenocarcinomaoftheNPCEinaChineseboyanddiscussits

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简介：RecentlyalowcostcookingdevicefordevelopingandemergingcountrieswasdevelopedatKITincooperationwiththecompanyBoschundSiemensHausgerteGmbH.Afterconstructinganinnovativebasicdesignfurtherdevelopmentwasrequired.Numericalinvestigationswereconductedinordertoinvestigatetheflowinsidethecombustionchamberofthestoveundervariationofdifferentgeometricalparameters.Beyondtheperformanceimprovementafurtherreasonoftheinvestigationswastoratetheeffectsofmanufacturingtoleranceproblems.InthispaperthenumericalinvestigationofaplantoilstovebymeansofRANSsimulationwillbepresented.Inordertoreducethecomputationalcostsdifferentmodelreductionstepswerenecessary.Thesimulationresultsofthebasicconfigurationcompareverywellwithexperimentalmeasurementsandproblematicbehaviorsoftheactualstovedesigncouldbeexplainedbytheinvestigation.

简介：汽油的清洁与它的部件有关，properties.All广告汽油在引擎的注射者，吸入阀门和燃烧房间上建立存款，罐头它显著地降低引擎表演和影响用尽煤气的emissions.In这研究，吸入阀门存款(IVD)和燃烧房间存款(电荷耦合器件)从包含aromatics的21v-42v的燃料的燃烧生产了，石蜡的8v-31v被学习了使用de的福特引擎测试，和特征

简介：Theangularaccelerationduetothespineffectincreasestheburningrateofsolidpropellantandchangesthemotorperformancebyincreasingtheoperatingpressureanddecreasingtheburningtime.Soitisimportanttoknowthegrainregressiontakenplaceinthesolidpropellantrocketmotorintheaccelerationfield.Thisstudyrepresentsthegrainregressionanalysisoftwo-dimensionalaxis-symmetricstargrainconfigurationofthesolidpropellantrocketmotorwithspininducedaccelerationeffectandpressureeffectonburnrateusinggeometricalandnumericalanalysis.Whiletherocketisspinning,theburnratesoneachpointofthepropellantsurfacearedifferentwithitsradialdistance,accelerationvectorangleandsurfaceslope.Withthedifferentburnratesonthepropellantsurface,weanalyzethepropellantsurfaceperimeterandportarea,andtheseresultsarecomparedwiththoseofconstantburnrateandburnrateaffectedbythechamberpressure.

简介：Theneutralgaspressureindivertorchamberisaverybasicandimportantphysicsparameterbecauseitdeterminesthetemperatureofchargedparticles,thethermalfluxdensityontodivertorplates,theerosionofdivertorplates,impurityretainingandexhausting,particletransportationandconfinementperformanceofplasmaintokamaks.Therefore,thepressuremeasurementindivertorchamberistakenintoaccountinmanylargetokamaks.

简介：A2m~3isothermalcloudchambermainlyforicenucleationresearchisdescribedinthispaper.Itsstructure,attachedinstrumentsandexperimentalproceduresarealsopresented.TheexperimentsofdeterminingtheicenucleieffectivenessfortheAgl-containingaerosolsproducedbythreeformulationshavebeenconductedandtheresultshavebeencomparedwiththoseoftheCSU960-literisothermalcloudchamber.Allexperimentalresultsshowthatthechamberhasadvantagesofstableperformanceandreproducibility.Itwouldbeexpectedtobecomeausefulexperimentalfacilityforicenucleationresearch.

简介：Wereportontheexperimentalobservationoftheairflowmotioninducedbyan800nm,1kHzfemtosecondfilamentinacloudchamberfilledwithairandhelium.Itisfoundthatvortexpairswithoppositerotationdirectionsalwaysformbothbelowandabovethefilaments.WedonotobservethatthevorticesclearlyformedabovethefilamentinairjustbecauseoftheformationofsmallerparticleswithweakerMiescattering.Simulationsoftheairflowmotioninheliumareconductedbyusingthelaserfilamentasaheatsource,andthesimulatedpatternofvorticesandairflowvelocityagreewellwiththeexperimentalresults.更多还原

简介：Accordingtotheprincipleofthemicrowaveinterferometer,theaverageelectrondensityduetophasevariationobtainedbyinterferometercanbewrittenas:

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简介：Aimingattheconceptof'diagnosis',asimpleandeffectivebroadbandradarcrosssection(RCS)measurementsystemisconstructed,andsomemulti-dimensionalscatteringpropertiesdiagnosistechniquesarepresentedbasedonthesystem.Firstly,astepped-frequencysignalisemployedtoachievehighrangeresolution,combiningwithavarietyofsignalprocessingtechniques.Secondly,cross-rangeresolutionisgainedwitharotatingtable,andthehigh-resolutiontwo-dimensional(2-D)imagingofthescalemodelisobtainedbythemicrowaveimagingtheory.Finally,tworeceivingantennaswithasmalldistanceinaltitudeareused,andthethree-dimensional(3-D)heightdistributionofscatteringpointsonthescalemodelisextractedfromthephaseofimages.Sometypicalbodiesandascaleaircraftmodelarediagnosedinananechoicchamber.Theexperimentalresultsshowthat,afterscalingwithametalsphere,theaccurateonedimensional(1-D)RCSpatternofthemodelisobtained,andithasalargedynamicrange.Whenthebandwidthofthetransmittingsignalis4GHz,theresolutionofthe2-Dimagecanreachto0.0375m.The3-Dheightdistributionofscatteringpointsisgivenbyinterferometricmeasurement.Thispaperprovidesafeasiblewaytoobtainhigh-precisionscatteringpropertiesparametersofthescaleaircraftmodelinaconventionalrectangularanechoicchamber.

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简介：高密度的RF离子来源是一个中立横梁注射者的必要部分。在这研究，作者试图由通过分泌物房间的对称的轴插入一个薄绝缘的试管翻新一个原来的常规RF离子来源反应堆。在这个内胎的帮助下，反应堆能够产生一个光线的磁场而不是原来的横向的磁场，它解决E????

简介：Byusingthephysicalcharacteristicofthetitaniumwhenitissubliming,fourteentitaniumballsarefixedinthevacuumchambertoimprovethebackgroundofthewallofthevacuumchamberofHL-2A.Whenthefilamentsoftheballshave40-50Acurrent,temperaturesoftheballsisupto1200centigradeandtheballsbegintosublime.Thereforeinordertogetbetterparametersofplasma,wefabricatefourteenpowersuppliestoheattheballs.