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简介：Multiphaseflowcontrolwithelectromagneticbraking(EMBr)iswidelyusedinthecontinuouscastingofsteelslabs.Thebasicaimoftheflowcontrolsystemoftheprocessistodelivermoltensteelfromtheladlethroughthetundish,uppertundishnozzle,slidegate,andsubmergedentrynozzleintothemoldregionwithminimaldefects.Thisrequirestheoptimizationofturbulencelevelsatameniscustoavoidbothanexcessivelyfastflow(whichcreateshighfluctuationsofthemeniscuslevelinadditiontoslagentrapment,surfacenonuniformities,andsurfacedefects)andinsufficientslowflow(whichleadstomeniscussolidification,inadequatefluxinfiltration,andsurfacedefects).Inthisstudy,aEulerian-LagrangianapproachisusedtoinvestigatetheeffectsofEMBrandArbubbleinjectiononthesurfaceflowvelocity.TheresultsshowthathighArinjectionratescanleadtoanincreaseinsurfacevelocity.

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简介：中国城市面对高、很快增加的暴露到灾难。减少灾难危险是为灾难管理和风险减小的一项直接、有效的反措施，它要求对社会和经济的危险的首先客观的评价。对经济危险的评价是在风险评估，为有效灾难预防计划的一个前提和为紧急情况管理的一个重要的底的重要的步。这份报纸为估计经济危险开发一个模型，它各种各样的工业部门和经济密度的企业，危险和重要性的尺寸考虑。基于模型，这份报纸开发一个城市的经济危险评估系统并且在北京把它用于Haidian区域，结果帮助鉴别在它的647，块在哪儿高度并且很高度以经济脆弱，并且它为灾难前预防计划提供有用、实际的信息，灾难有准备和紧急情况管理。在这研究开发的经济危险评价模型和系统使让政府快速评估一般经济危险并且识别特定的脆弱的区域可能，做对灾难管理信息系统和决定支持系统的贡献。

简介：Weproposeacross-talk-freeintegralimaging3Ddisplaybasedonapyramidpinholearray.Thepyramidpinholearrayisusedtoprovideapointlightsourcearray.Sincethegeneratedpointlightsourcearrayisbehindatransmission-typedisplaypanelthatdisplaysanelementalimagearray,thepseudoscopicproblemcanberesolved.Bysettingtheappropriateparametersforthepyramidpinholearray,thecrosstalkcanbeeliminated.Weexperimentallyverifythereconstructionoftheorthoscopicandcross-talk-free3Dimagesusingtheproposed3Ddisplay.

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简介：Makinguseofaneasiermethod,thispaperderivestheprobabilitydensityfunction（pdf）ofthelinearcombinationofrandomvariableZ=αX＋βY.Furthermore,cumulativedistributionfunction（cdf）ofZ=αX＋βY,whereXandYhavethebivariateexponentialdistributions,hasalsobeenproposedinthispaper.Resultsfromthispaperwouldhaveimportantroleinthereliabilitystudy.

简介：TheTangjiashanlandslidedamfailedonJune10,2008,whichwasthelargestoneformedduringtheWenchuanearthquakeinChina.Nohumanliveswerelostinthisdamfailure.Thispaperpresentsadescriptionofthedam,includingthedamgeometry,thehydrographandthereservoircapacity,thediversionchannelandthedrainagefromthelake.Severalempiricalmodelsareappliedtopredictthebreachparameters,thepeakoutflowsandthereservoirvolumesduringthisbreachevent.Themainobjectiveofthestudyistocomparevariouspredictionmodelsandtomakerecommendationofthebestmodelforthepredictionofthebreachwidth,thefailuretime,andthepeakoutflow.ThebreachwidthspredictedbytheFroehlichmethodswithconsiderationsofthereservoirstoragesandtheeffectoffailuremodeareconsideredtobemorereasonable.Allpredictionmethodsdiscussedinthispaperarefoundtounderestimatethebreachformationtimeduetothecomplexmaterialandthelargethicknessofthedam.Theresultsfromthesoilconservationservices(SCS)methodcomparewellwiththeobservedpeakoutflow.TheMaronemethodincombinationwiththecoefficientexpressionsproposedbyMacchionegivesexcellentresultsinthesimulationofthereservoirvolume-levelcurve.

简介：phosphorenenanostructures的光反应用时间依赖者密度被学习功能的理论(TDDFT)。与graphene的吸收光谱相比，phosphorenenanostructure的在紫外区域展出高吸收度，它显示高轻的吸收率。在一个低精力的回声地区，一光谱乐队延长到全部在红外线附近的区域。当推动刺激在扶手椅边方向极化时，在很少层phosphorenenanostructure的低精力的电浆子显示出明显的远程的费用转移刺激，但是是少些显著地读了之字形边方向。边配置显著地影响单层phosphorenenanostructures的吸收光谱。扶手椅边和之字形边在吸收光谱服务不同功能。而且，当推动刺激在扶手椅边方向极化时，很少层phosphorenenanostructure的吸收光谱随着层的数字变化。另外，在低精力的回声地区的变化在高精力的回声地区与那显著地不同。

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简介：Toinvestigatethemechanismofsecondarycirculationsinripcurrentsystems,andtoexploretherelationshipbetweenwaveconditionsandsecondarycirculationintensity,aseriesofnumericalexperimentsisperformedusingcouplednearshorewavemodelandcirculationmodel.Intheseexperiments,theripcurrentsandsecondarycirculationsgeneratedabovebarredbeacheswithripchannelsaresimulated.Acomparisonexperimentisconductedtoinvestigatetheformationandhydrodynamicsofthesecondarycirculations.Modelresultsindicatethatthesecondarycirculationsconsistofalongshoreflowsdrivenbywaveset-upneartheshoreline,partofthefeedercurrentsdrivenbythewaveset-upoverthebars,andonshoreflowsattheendoftheripchanneldrivenbywavebreakingandconvection.Theexistenceofthesecondarycirculationbarelyaffectstheripcurrent,butnarrowsandintensifiesthefeedercurrents.Threegroupsofexperimentsofvaryingincidentwaveconditionsareperformedtoinvestigatetherelationshipbetweenwaveconditionsandsecondarycirculationintensity.Thevelocityofthealongshoreflowofthesecondarycirculationissensitivetothevariationoftheincidentwaveheightandwaterdepth.Itisalsofoundthatthealongshoreflowintensityisindirectproportiontothealongshorevariationofthewaveheightgradientbetweenthebarsandtheshoreline.

简介：在在Brookhaven国家实验室的相对论的重离子Collider(RHIC)的PHENIX和星实验在\(\sqrts\)正在运用极化的protonproton碰撞=200和500GeV。RHIC旋转物理节目的主要目标是获得更深的卓见进核子的旋转结构。我们将从RHIC给最近的旋转结果的概述，特别地，经由喷气/强子生产的gluon极化的学习和经由在纵的W波色子生产的海夸克极化极化了protonproton碰撞。

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简介：CART(Constituent-orientedageandresidencetimetheory)andPTM(Particle-trackingmethod)aretwowidelyusednumericalmethodstocalculatewaterage.Thesetwomethodsareessentiallyequivalentintheorybuttheirresultsmaybedifferentinpractice.Thedifferenceofthetwomethodswasevaluatedbyapplyingthemtocalculatewaterageinanidealizedone-dimensionaldomain.Themodelresultsbythetwomethodsareconsistentwitheachotherinthecasewitheitherspatiallyuniformflowfieldorspatiallyuniformdiffusioncoefficient.Ifweallowthespatialvariationinhorizontaldiffusion,atermcalledpseudodisplacementarisingfromthespatialvariationofdiffusioncoefficientlikelyplaysanimportantroleforthePTMtoobtainaccuratewaterage.Inparticular,ifthewaterparticleisreleasedataplacewherethediffusionisnottheweakest,thewateragecalculatedbythePTMwithoutpseudodisplacementismuchlargerthanthatbytheCART.ThissuggeststhatthepseudodisplacementcannotbeneglectedinthePTMtocalculatewaterageinarealisticocean.Asanexample,wepresentitspotentialimportanceintheBohaiSeawherethediffusioncoefficientvariesspatiallyandgreatly.

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简介：ForthesuccessofPAL-XFEL,twocriticalsystems,namelyalowemittanceinjectorandavariablegapout-vacuumundulator,areunderdevelopment.InordertorealizethetargetemittanceofthePAL-XFELinjectorwecarriedoutanoptimizationstudyofvariousparameters,suchasthelaserbeamtransverseprofile,thelaserpulselength,thelaserphase,andthegunenergy.ThetransverseemittancemeasuredattheInjectorTestFacility(ITF)isεx=0.48±0.01mmmrad.AnundulatorprototypebasedontheEU-XFELdesignandmodifiedforPAL-XFELwasbuiltandtested.Alocal-Kpoletuningprocedurewasdevelopedandtested.Asignificantreduction(90%)ofthelocal-Kfluctuationwasobserved.Therequirementofundulatorfieldreproducibilitybetterthan2×10-4andtheundulatorgapsettingaccuracybelow1μmwereachievedfortheprototype.Theopticalphasejitterafterthepoleheighttuningatthetuninggapwascalculatedtobe2.6?rms,whichsatisfiestherequirementof5.0?.