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500 个结果
  • 简介:TheMS7.0JiuzhaigouearthquakeoccurredonAugust8,2017.TheearthquakeoccurredinthevicinityoftheTazangfault,theMinjiangfaultandtheHuyafault,wherethefocalmechanismisofthestrikesliptype.Thestaticanddynamicanomaliesofthegravityfieldcanprovideimportantphysicalfieldinformationforstudyingthestructuralpropertiesofdeepcrust.Multi-scaledecompositiontechniquesareusedtoseparateBouguergravityatdifferentdepthsandgivesomeexplanationtogravityvariationsatdifferenttimespacescales.Theresultsindicatethatthewaveletmulti-scaleresultsoftheEGM2008modelandthemeasuredgravitydataareconsistent.Throughcomparativeanalysis,itisfoundthattheJiuzhaigouearthquakeoccurredinthestressenhancedregion.Thevariationofgravityfieldatdifferenttimescaleshasacertainscientificsignificanceforfurtherunderstandingpotentialearthquakerisktrend.

  • 标签: Jiuzhaigou MS7.0 EARTHQUAKE GRAVITATIONAL field WAVELET
  • 简介:在一个应用磁场(MF)的影响下面,eigenenergies和地面和第一个激动的状态(GFES)的特徵函数被在联合不均匀的Gaussian潜在的量很好的强壮的electron-LO-phonon(AGPQW)使用Pekar类型(VMPT)的一个变化方法获得。这个AGPQW系统可以作为二水平的qubit被采用。数字结果显示了(i)当电子处于GFES的重叠状态位于时,我们在AGPQW获得时间进化和电子概率密度的并列变化,(ii)由于在AGPQW的生长方向的不均匀的潜力的存在,概率密度显示出双山峰配置,而仅仅有一个,如果监禁是在AGPQW的xy飞机的二维的对称的,达到顶点,(iii)oscilla

  • 标签: 非对称 量子阱 量子比特 高斯 磁场 电子概率密度
  • 简介:这份报纸发源维的分析的讨论并且在有磁力地帮助的使流体化的床上可伸缩。进程变量的基本检查,合并机械、磁性的单位,允许变量的混合集合的变换直到作为贡献帮助使液化行为的领域的效果代表表面力量的统一术语。自从新变量都是由三个基本领域产生的典型压力,这转变被称为压力变换:严肃,磁性并且液体流动。这条途径以无尺寸的组而非对古典维的分析恰当的正式代数学的操作探讨物理基础。基本的无尺寸的组称为小粒的磁性的邦德数字作为严肃并且磁场的典型压力的比率被介绍。这分析也提供描绘磁场的一套命名无尺寸的数字帮助使液化象Filippov数字,Rosensweig数字,Kwauk数字和Siegell数字那样,作为典型压力的比率发源。

  • 标签: 磁场辅助 流态化 二维分析 键数
  • 简介:阶段地水晶(陆军)模型被用来模仿premelting脱臼运动对称当系统温度在时,在紧张行动下面倾斜谷物边界(STGB)远非,到融化的融化的点和结束分别地指。结果证明当premelting温度被接近到,本地premelting发生包围脱臼从在温度下面。STGB的premelting脱臼能在紧张行动下面滑行,并且premelting区域是为脱臼滑行的一个同伴。STGB腐烂的过程以二个高温度条件是很类似的。当premelting介绍,它减少为脱臼的滑行抵抗并且导致脱臼的一个更快的运动,并且也在STGB的腐烂过程期间引起系统的更多的精力减小。尽管有把紧张用于这些,premelting在STGB的整个腐烂过程取样,premelting脱臼区域显然不发展并且延长。这显示外部紧张行动不在高温度支持premelting,并且不能导致更多的premelting脱臼,它能在脱臼展览附近被欠到premelting阶段像液体的性质并且到容易滑行并且放松紧张精力的premelting脱臼;这与实验和分子的动力学的结果一致。

  • 标签: 位错反应 晶界 晶体 相场 温度条件 移动
  • 简介:Theeffectoffullysubmergedbouldersontheflowstructureinchannelshasbeenstudiedbysomeresearchers.However,manynaturalstreamshavebedmaterialwithbouldersthatarenotfullysubmergedunderwater.Inmanynaturalstreams,boulderscoverbetween1%and10%oftheareaofthestreamreach.Theeffectofnon-submergedbouldersonthevelocityprofileandflowcharacteristicsisveryimportantforassessingriverbeddeformation.Theobjectivesofthispaperaretofindthepatternofvelocitydistributionaroundanon-submergedboulderandtocompareitwiththeclassicalstudiesonflowresistanceandReynoldsstressdistributioninopenchannels.Also,byconsideringthevariationintheReynoldsstressdistributionatdifferentlocationsaroundanon-submergedboulder,theeffectofanon-submergedboulderontheestimationofshearvelocityandresistancetoflowhasbeeninvestigated.Resultsindicatesthatinsidethescourholecausedbyanon-submergedboulderinarivervelocitydistributionsareirregular.However,velocitydistributionsareregularoutsidethescourhole.ThepresenceofthebouldercausesaconsiderabledeviationoftheReynoldsshearstressfromtheclassicdistribution,showinganon-specificdistributionwithnegativevalues.TheclassicalmethodsforcalculatingshearvelocityarenotsuitablebecausethesemethodsdonotgivedetailedvelocityandReynoldsstressdistributionsinnaturalriverswithalotofboulders.Thus,theeffectofanon-submergedboulderontheestimationoftheresistancetoflowbyconsideringthevariationsinvelocityandReynoldsstressdistributionsatdifferentlocationsaroundanon-submergedboulderisimportantandneedstobestudiedinanaturalriverinsteadofjustinlaboratoryflumes.ThenegativevaluesinReynoldsstressdistributionaroundaboulderindicatethattheclassicalmethodsareunabletopredictresistancetoflow,andalsoshowstrongturbulenceinsidethescourholewherethecomplexflowconditionspresentambi

  • 标签: Irregular velocity distribution Logarithmic law Non-submerged
  • 简介:Theinteractionsofstrong-fieldfew-cyclelaserpulseswithmetastablestatesofnoblegasatomsareexamined.Metastablenoblegasatomsofferacombinationoflowionizationpotentialandarelativelysimpleatomicstructure,makingthemexcellenttargetsforexaminingionizationdynamicsinvaryingexperimentalconditions.Areviewofthecurrentworkperformedonmetastablenoblegasatomsispresented.

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  • 简介:Sn-polymetallicoresatDachang,GuangxiAutonomousRegion,China,arehostedinMiddle-UpperDevonianreeflimestones,siliceousrocks,bandedandlenticularlimestones,etc.Twotypesoforebodiescanbedistinguishedaccordingtotheirtelationstothebedding:oneisdistributedalongthebeddingandthe.othercutsacrossthebedding.SnandsulfideorebodiesassociatedwithK-feldsparearemostlycharacterizedbylaminatedorestructure.MicroscopicexaminationsofK-feldspar-bearingrocks,inconjunctionwithX-raydiffraction,chemicalcomposiionandcathodoluminescencedataforK-feldspars,aswellastheirtelationstomineralization,theauthorsconsiderthattheK-feldspareareofauthigenicorigin,subordinatetotheepigeneticstageofdiagenesis,Theyresultedfromthereactionofmixed,deep-seated,circulatingundergroundhotwatersrichinK,AlandSiwithargillaceouscarbonatesduringtheIndonesianorogenicmovement.ItissuggestedmoreattentionshouldbepaidtotheeffectofauthigenicK-feldsparsonSnmineralization.Inthemeantimetheeventrelatedtocirculatingundergroundhotwatersshouldalsobetakenintoaccountsoastoprovidenewcluestoblindoreprospecting.

  • 标签: 钾长石 锡矿床 自生作用 成矿作用
  • 简介:Theschliereninterferogramsusedtobeanalyzedinaqualitativeway.Inthispaper,bymeansofthepowerfulcomputationalabilityandthelargememoryofcomputer;theimageprocessingmethodisinvestigatedforthedigitalizationofanaxisymmetricschliereninterferogramandthedeterminationofthedensityfield.Thismethodincludesthe2-Dlow-passfiltering,thethinningofinterferometricfringes,theextractionofphysicalinformationandthenumericalintegrationofthedensityfield.Theimageprocessingresultsshowthattheaccuracyofthequantitativeanalysisoftheschliereninterferogramcanbeimprovedandalotoftimecanbesavedindealingwithopticalexperimentalresults.Therefore,thealgorithmusedhereisusefulandefficient.

  • 标签: flow visualization SCHLIEREN INTERFEROGRAM image processing
  • 简介:Theeffectsofthemagneticfieldonthevalencebondpropertyofthedouble-quantum-dotmoleculearenumericallystudiedbythefiniteelementmethodandperturbationapproachbecauseoftheabsenceofcylindricalsymmetryinthehorizontallycoupleddots.Thecalculationresultsshowthattheenergyvalueofthegroundstatechangesdifferentlyfromthatofthefirstexcitedstatewithincreasingmagneticfieldstrength,andtheycrossunderacertainmagneticfield.Theincreasingmagneticfieldmakesthecovalentbondstatechangeintoanionicbondstate,whichagreesqualitativelywithexperimentalresultsandandmakesionicbondstatesremain.Theoscillatorstrengthoftransitionbetweencovalentbondstatesdecreasesdistinctlywiththeincreasingmagneticfieldstrength,whenthemoleculeisirradiatedbypolarizedlight.Suchaphenomenonispossiblyusefulforactualapplications.

  • 标签: 半导体 量子斑点 磁场 价带特性
  • 简介:Wesystematicallystudiedtheinfluenceofmagneticfieldonzero-linemodes(ZLMs)ingrapheneanddemonstratedthephysicaloriginoftheirenhancedrobustnessbyemployingnoneqnilibriumGreen'sfunctionsandtheLandauerBiittikerformula.Wefoundthataperpendicularmagneticfieldcanseparatethewavefunctionsofthecounter-propagatingkinkstatesintooppositedirections.Specifically,theseparationvanishesatthechargeneutralitypointandincreasesastheFermileveldeviatesfromthechargeneutralitypointandcanreachamagnitudecomparabletothewavefunctionspreadatamoderatefieldstrength.SuchspatialseparationofoppositelypropagatingZLMseffectivelysuppressesbackseatteringandismoresignificantunderzigzagboundaryconditionthailunderarmchairboundarycondition.Moreover,thepresenceofmagneticfieldenlargesthebulkgapandsuppressestheboundstates,therebyfurtherreducingthescattering.ThesemechanismseffectivelyincreasethemeanfreepathsoftheZLMstoapproximately1|iniinthepresenceofadisorder.

  • 标签: GRAPHENE TOPOLOGICAL STATE zero-line STATE electronic
  • 简介:作者(1997a)建立的一个移动采样理论是Fourier变换计算理论的归纳。基于这个理论,我在波浪数字领域开发潜在的地转变的一个算法错误(A-E)方程,它不仅给潜在的地转变的一个更灵活的算法,而且在波浪数字领域揭示潜在的地转变的错误的法律。DFT0ηη(0.5,0.5)显著地从A-E方程导出的reduction-to-pole(RTP)技术在低磁性的纬度改进RTP异例的决定和精确性,包括磁性的赤道。A-E方程揭示的边摆动的法律(起源,表格机制,和必要性质)理论上指出改进存在在波浪数字领域在高通行证的转变填方法的效果的一个方法。

  • 标签: 变换方程 波数域 声发射 潜力 应用 傅立叶变换
  • 简介:Inthispaper,recentmeasurementsoftipvortexflowwithandwithoutcavitationcarriedoutinCavitationMechanismTunnelofChinaShipScientificResearchCenter(CSSRC)arepresented.TheelliptichydrofoilwithsectionNACA662-415wasadoptedastestmodel.High-speedvideo(HSV)camerawasusedtovisualizethetrajectoryoftipvortexcoreandtheformoftipvortexcavitation(TVC)indifferentcavitationsituations.LaserDopplervelocimetry(LDV)wasemployedtomeasurethetipvortexflowfieldinsometypicalsectionsalongthevortextrajectorywiththecaseofcavitationfree.Stereoparticleimagevelocimetry(SPIV)systemwasusedtomeasurethevelocityandvorticitydistributionswithandwithoutcavitation.Seriesmeasurementresultssuchasvelocityandvorticitydistributions,thetrajectoryoftipvortexcore,thevortexcoreradius,cavitysizeandcavitationinceptionnumberwereobtained.Theresultsdemonstratedthattheminimumpressurecoefficientinthevortexcoreobtainedbyflowfieldmeasurementwasquitecoincidentwiththetipvortexcavitationinceptionnumberobtainedundertheconditionofhighincomingvelocityandlowaircontent.AndTVCwoulddecreasethevortexstrengthcomparingwiththecasewithoutcavitation.

  • 标签: 旋涡流动 测量速度 水翼船 椭圆形 成穴 试验性
  • 简介:EFFECTOFSUCPENDINGMEDIUMVISCOSITYONORIENTATIONANDDEFORMATIONOFRBCSINASHEARFlOWFIELDWenZong-yao,MaWeiyuan,GaoTie,SunDagongDepa...

  • 标签: :constant head VESSEL DIALYSIS hypoxemia.
  • 简介:TheSimplifiedSimpleBiospheremodel(SSiB)isvalidatedinoff-linesimulationsagainstfieldmeasurementsinthesummerof2001fromtheChinaHeavyRainfallExperimentandStudy(CHeRES)overagrasslandsitelocatedinthelowerreachesoftheYangtzeRiver.Wheninitializedanddrivenbytheobservedatmosphericforcing,themodelreproducedtheobservedsurfaceheatfluxesandsurfaceskintemperaturerealistically.Themodelwasalsoabletowellsimulatethevariationofsoilwatercontent.Thesensitivityexperimentsfoundthattheleafreflectancewasthemostsignificantparameterinimprovingtheestimationofsurfacealbedoduringbothwetanddryperiods.Thisstudysuggeststhatthemodeliscapableofsimulatingthephysicalprocessesandofassessingtheimpactofbiophysicalparametersthatrelatetoland-atmosphereinteractionsovertheeasternAsianmonsoonregions,whichiscrucialformesoscaleatmosphericmodels.

  • 标签: 离线统计 亚洲季风型气候地区 中尺度大气模型 CHeRES 降雨量
  • 简介:Inthispaper,theeddycoefficientandthetreatmentfordividinglayersofEstoque’snumericalmodelinmodernPBLdynamicshavebeenappliedtoderiveorder-zeroandorder-oneanalyticsolutionsoverlarge-scaletopography,thesolutionsareusedtoobtainthedivergenceandverticalvelocity,improvingthepreviousresults.

  • 标签: flow field LARGE-SCALE TOPOGRAPHY PLANETARY BOUNDARY
  • 简介:Thishighlyinterdisciplinaryresearchpaperdiscussessomenewinsightsintothefundamentalpropertiesofinformation-richsocialnetworks.Itmainlyfocuseson:i)Postulatingthegeneralpropertiesofaninformation-basednetworkingeconomy;ii)Modelingemergentandself-organizingfeaturesofsocialnetworks;iii)Discussinghowtosimulatecomplexsocialsystemsusingafield-basedapproachandmulti-agentplatforms.Additionally,thispapergivessomeideasofhowtoconstructavirtualfield-basedcommunicationsnetworkofintelligentagentsusingcurrentlyavailablecomputationalintelligencemethods.Anewsimulationparadigmofferssomeusefulconceptstotransformmultidimensionalfactorspace(representingamultiplicityofphenomenalformsandinteractions)intothemostuniversalspectralcodingsystem.Thispapergivessomeideasofhownotonlythecommunicationmechanismbutalsothesocialagentscanbesimulatedasoscillatingprocesses.

  • 标签: 社会系统 虚拟场 基础 概念框架 仿真 计算智能方法
  • 简介:Recently,considerableprogresshasbeenmadeinunderstandingtheearlyuniversebyloopquantumcosmology.Modestoetal.investigatedtheloopquantumblackhole(LQBH)usingimprovedsemiclassicalanalysisandtheyfoundthattheLQBHhastwohorizons,aneventhorizonandaCauchyhorizon,justliketheReissner-Nordstr¨omblackhole.ThispaperfocusesonthedynamicalevolutionofamasslessscalarwaveintheLQBHbackground.ByinvestigatingtherelationbetweenthecomplexfrequenciesofthemasslessscalarfieldandtheLQBHparametersusingthenumericalmethod,wefindthatthepolymericparameterPmakesthemasslessscalarfielddecaymorequicklyandmakesthegroundscalarwaveoscillateslowly.However,thepolymericparameterPcausesthefrequencyofthehighharmonicmasslessscalarwavetoshiftaccordingtoitsvalue.Wealsofindthattheloopquantumgravityareagapparametera0causesthemasslessscalarfieldtodecaymoreslowlyandmakestheperiodofthemasslessscalarfieldwavebecomelonger.Inthecomplexωplane,thefrequencycurvesmovecounterclockwisewhenthepolymericparameterPincreasesandthisspiraleffectismoreobviousforahigherharmonicscalarwave.

  • 标签: 量子黑洞 标量场 质量 频率 时空 高次谐波
  • 简介:Inagasturbineenginecombustor,highlyswirlingcombustionisusuallyadoptedtostabilizeflameandreducepollutantemissions.Swirlcup,asanairblastatomizer,iswidelyusedtoprovideauniformpresentationoffueldropletstothecombustordome.Thispaperinvestigatedtheeffectofsecondaryswirlerontheflowfielddownstreamoftheswirlcupusingparticleimagevelocimetry(PIV).Threeswirlcups’non-reactingflowfieldwerestudied:caseA,BandCwithsecondaryswirlervaneangle53°,60°and68°respectively.Detailedmeanandtransientvelocitiesandvorticityinthecenterplanewereobtained.FromthePIVresults,asharpcontrastflowfieldwasobtainedforcaseAtoothertwocasesduetothelowersecondaryswirlingintensity.TherecirculationzoneiscollapsedindisorderforthecaseA.Ignitiontestsofthethreecupswerecompletedinasinglecupcombustor.Ingeneral,theignitionperformanceincreaseswiththeincreasingofthesecondaryswirlingintensity.ForcaseA,theignitionperformanceisveryunstableandhasmuchrandomnessandthereisnoclearleanignitionboundarycanbegenerated.Thisworkcanfurtherunderstandtheswirlbehaviorandignitionmechanism.

  • 标签: 点火性能 反应流场 旋流器 粒子图像测速技术 燃气涡轮发动机 空气雾化喷嘴