简介:AnexperimentalapparatustoinvestigateACMHDpumpwasestablished,whichmainlyconsistsofarotarypermanentmagnetwith4polesanannularchannel,amotor,ashaftandaplatform.Themagnetgeneratesafieldsimilartosinusoidwiththemaximumof0.9TinthechannelwhenitisrotatedupbythemotortosimulateanACmagneticfield.Thismovingmagneticfieldactsontheconductivefluidinthechannel,andproducesanelectromagneticforcetomovethefluidinthesamedirectionasthatofthemagnetrotating.Experimentswerecarriedouttoinvestigatetheperformanceofthepump.Flowvelocityintheannularchannelwasmeasuredfordifferentconductivitiesandrotatingspeedsofthemagnet.Theresultsshowthattheflowrateandpressureincreaseasthemagneticfieldstrength,fluidconductivityandfrequencyofthemagneticfieldincrease.
简介:Theaimofthisexpositionistoprovideadetaileddescriptionoftheuseofcombinatorialalgebrainquantumfieldtheoryintheplanarsetting.ParticularemphasisisplacedontherelationsbetweendifferenttypesofplanarGreen'sfunctions.TheprimaryobjectisaHopfalgebrathatisnaturallydefinedonvariablesrepresentingnon-commutingsources,andwhosecoproductsplitsintotwohalf-coproducts.Thelattergiverisetothenotionofanunshuffiebialgebra.ThissettingallowsadescriptionoftherelationbetweenfullandconnectedplanarGreen'sfunctionstobegivenbysolvingasimplelinearfixedpointequation.Wealsoincludeabriefoutlineoftheconsequencesofourapproachintheframeworkofordinaryquantumfieldtheory.
简介:在一系列最近的报纸[1-4]没有,免费的量地理论怎么能用机械原语被导出,被显示出(包括时空,特殊相关性,量子化规则,等等),但是仅仅考虑包含其相互作用的网络满足unitarity,同质,地区,和isotropy的简单原则的量系统的一个可计算的集合的最容易的量算法。这打开了线路到扩大抽象系统的量子论的公理的信息理论上的推导[5,6]包括量域理论。参考axiomatization的固有的分离性质导致量地理论的延期到量细胞的自动机理论,在平常的地理论在自动机的分离结构不能被探查的政体被恢复的地方。简单启发式的争论给组件的规模到普朗克常数规模的A,和组件不是可见的惯常的物理政体是相对论小wavevectors之一。
简介:Tostudythepossibilityofdetectingthecrossingchannelbyusingatraditionalloggingtool,acousticfieldgeneratedbyamonopolesourceinacasedwellwithacrossingchannelofvariousanglesissimulatedby2.5-DFiniteDifferenceMethod(FDM).Snapshotsofnormalstressandsynthetictime-domainwaveformsaredisplayed.Thetwo-dimensionalspectruminwave-numberandfrequencydomainsisalsocalculated,wheretheinfluenceofthechannelisclearerthanthatinthewaveforms.Numericalstudydemonstratedthatacrossingchannelcanbedetectedandsizedifitsangleisgreaterthan30degree,andlargerspacingandlowerfrequencysourcearefavorabletodetectandsizethecrossingchannel.
简介:Tomeettherequirementsfortheaerodynamicperformanceandthrustforcedemandedinhypersonicmissions,theintegrationdesignoffuselageandenginemustbeconsideredforhypersonicvehiclewithascramjetengine.Theconfigurationofwaveriderisatypicalhypersonicvehicleshape,whosefore-bodycancompresstheflowinadvanceandprovideuniformflowfortheairintake,andwhoseaft-bodyisusedasanexpansionsurfaceofnozzle.Inthepresentpaper,anengineeringmethodisappliedtodefinetotalaerodynamiccharacteristicsofanapproximatewaveriderconfiguration.Afinitevolumemethodbasedonthecenterofgridisalsoemployedtonumericallyinvestigatetheoutflowpassthesameconfiguration.Theflowfielddetailsandtheaerodynamicchanacteristicsatgivenconditionsareobtained.Theevaluationforthisconfigurationmaybeusedasaguideforthehypersonicvehicleexperiment.
简介:为测试作为这个区域拿中国,新卫星严肃技术的潜力,为改进地区性的重力场模型的精确性追踪的satellite-to-satellite被学习。与是的WDM94引用,三个模型,的严肃异例剩余最近二个优雅全球重力场模型(EIGEN_GRACE02S,GGM02S)并且EGM96,被计算并且比较。为在三个模型的剩余之中的差别的原因被讨论。在剩余之间的Thecomparison证明在选择区域,EIGEN_GRACE02S或GGM02S比在更低的度部分(不到110度)的EGM96好。通过模型严肃异例剩余的分析,另外,有期刊性质的一些系统的错误在EIGEN和GGM模型,的更高的度部分存在,这被发现结果能也在SST严肃数据的确认作为引用被拿。
简介:Weldingtechnologyinoil-fieldconstructioninChina¥HOUXianzhong(DaqingOilField)Abstract:Thispaperintroducestheapplicationanddeve...
简介:Spatialandtemporalvariationof gravity fieldinthecapitalregionChang-CaiHUA;(华昌才)YongGUO;(果勇)Duan-FaLIU;(刘瑞法)GangXIAO;(肖钢),J.T....
简介:Thedistributionofelectricfieldforthealignmentandattachmentofcarbonnanotubes(CNTs)wassimulated.Tobeattachedatthedesiredplace,thealignedandattractedCNTsshouldbestayedinthedesiredareacalledthestableregionorthequasi-stableregionforaninstantwherethechangeofelectricfieldisminimized.Sincetheconicalelectrodehastheverynarrowsizedquasi-stableregion,fewCNTscanbeattached.Therectangularelectrodeshaveawidestableregion,solotsofCNTscanbeattached.Theresultsindicatethattheroundelectrodewhichhasapropersizedquasi-stableregionismoreeffectiveforaligningandattachingasingleCNTthantheconicalorrectangularshapedelectrodes.
简介:Wehavedesignedanddemonstratedasimple,widefield-of-view(FOV=60°)foveatedimagingsystemutilizingadeformablemirror.Thedeformablemirrorisusedtodynamicallycorrecttheoff-axisaberrationsthatlimittheusefulFOVofthesystem.ThesystemmimicstheoperationofhumaneyethroughcreatinganimagewithvariablespatialresolutionandcanbemadesignificantlysmallerandmorecompactthanaconventionalwideFOVsystem.Experimentsshowthatthissystemcanbeusedinmanyareaswheresize,weight,anddatatransmissionbandwidtharecritical.
简介:在旋转地效果晶体管的弹道的旋转运输被考虑联合的Rashba纺纱轨道学习,界面的散布,并且乐队失配。有半导体隧道长度的旋转传导力摆动是Rashba旋转领前和旋转干扰摆动的重迭,这被显示出。他们与k_R有不同摆动时期π/k_R和π/kRashba波浪向量和k半导体隧道的Fermiwavevector,和戏慢、快速的摆动的不同部分,取决于π/k_R和π/k的相对大小。仅仅在k=k_R,旋转传导力展出一个单个时期的摆动。掘的磁致电阻的不同行为的二种类型被讨论。
简介:Thecoalescencetimebetweentwocontactingbubbleswasmeasuredexperimentallyindifferentacousticpressuresandfrequenciesusinganimagingsystemwithahigh-speedvideocamera,andtakenananalysistotheinfluenceofthesecondaryBjerknesforceandmaximumoscillationvelocityonthecoalescencetimeoftwocontactingbubblesinthispaper.Itshowedthatundertheactionofdifferentacousticpressuresandfrequencies,thecoalescencetimeincreaseswithsecondaryforceandmaximumoscillationvelocity.TheanalysisandcomparisonofthesecondaryBjerknesforceandmaximumoscillationvelocityfortheeffectofbubblecoalescencetimeshowedthatthesecondaryBjerknesforceisthecriticalfactortoinfluencethebubblecoalescence.
简介:PoplarisoneofthedominanttreespeciesfortheestablishmentoffastgrowingplantationsinShandongProvince.EighteenpoplarclonesbelongingtoPopulusaigeirossectionwereintroducedfromItaly,Turkeyanddomesticregions.Populusdeltoidescv.'Lux'I-69/55(I-69),whichwaswidelyusedinShandongProvince,China,wastakenascontrolclone(I-69).Followingarandomizedcompleteblockdesign,seedlingtestandcontrolledafforestationtrialswerecarriedoutatJuxianCounty,CaoxianCountyandLaiyangCity.Theresultsshowedthatthepoplarclone(Populus×euramericanacv.'102/74'),namely102/74,performedwellbothintermsofadaptabilityandgrowthrate.Themeanheightof13.9m(H),diameteratbreastheightof18.0cm(DBH)andvolumegrowthof0.1445m3(V)were2.2%,21.6%and52.9%higherthanthoseofI-69(CK),respectively,attheageof5yearsatthreeexperimentalsites.Moreover,theclonecanbepropagatedeasilyandshowedhighresistancetopoplardisease,pestaswellassalinityandhadlongergrowingperiod.Furthermore,woodbasicdensityandfiberlengthofnewpoplarclone(102/74)wereassameasI-69(CK).Itwasconcludedthattheselectedclone(102/74)wasidealfortheestablishmentoffast-growingpoplarplantations,especiallyforthepulpwoodplantationsinShandongProvince.
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简介:Fieldcomputation,anemergingcomputationtechnique,hasinspiredpassionofintelligencescienceresearch.Anovelfieldcomputationmodelbasedonthemagneticfieldtheoryisconstructed.Theproposedmagneticfieldcomputation(MFC)modelconsistsofafieldsimulator,anon-derivativeoptimizationalgorithmandanauxiliarydataprocessingunit.ThemathematicalmodelisdeducedandprovedthattheMFCmodelisequivalenttoaquadraticdiscriminantfunction.Furthermore,thefiniteelementprototypeisderived,andthesimulatorisdeveloped,combiningwithparticleswarmoptimizerforthefieldconfiguration.Twobenchmarkclassificationexperimentsarestudiedinthenumericalexperiment,andonenotableadvantageisdemonstratedthatlesstrainingsamplesarerequiredandabettergeneralizationcanbeachieved.