简介:Longtermmorphologicalsimulationsusingcompletecoupledmodelsleadtoverytimeconsumingcomputations.Latteux(1995)presentedmodellingtechniquesdevelopedfortidalcurrentsituationsinordertoreducethecomputationaleffort.Inthispapertheapplicabilityofsuchmethodstosmallscaleproblemsisinvestigated.Itispointedoutthatthesemethodscanbetransferredtosmallscaleproblemsusingtheperiodicityofthevortexsheddingprocess.
简介:充分提取并且我的在时空尺寸的水库和地质的结构的多尺度的特征,新3D多尺度的容量的弯曲(MSVC)方法论在这份报纸被介绍。我们也为计算3D建议一个快算法容量的弯曲。与常规容量的弯曲属性相比,它的主要改进和关键算法在wavenumber域在时间频率领域和相应多尺度的适应微分操作符介绍多频率部件扩大,进容量的弯曲计算。这方法论能同时在两时空描绘地震多尺度的特征。另外,我们在各种各样的规模使用容量的弯曲的数据熔化充分利用弯曲大小在不同规模提取的地质的特征和异例。3DMSVC能加亮地质的异例并且同时减少噪音。因此,它改进弯曲属性分析的解释效率。3DMSVC被用于土地和海洋的3D地震数据。结果证明它能显示水库的空间分发,检测差错和破裂地区,并且识别他们的多尺度的性质。
简介:Thispaperpresentsalarge-scaleparticletrackingvelocimetry(LSPTV)systemformeasuringsurfacevelocityinvastunsteadyflows.Thesystemconsistsofaflexiblenumberofone-computer-six-cameraworkingunitsconnectedvialocalnetworkortheinternet.Multiplezero-tiltingcamerasareusedtoincreasesthefieldofviewwithminimumperspectivedistortions.Externalsynchronizationofvideooutputsofallcamerasfacilitatesuninterruptedimageacquisitionwithinthesystem.Effectivenessandefficiencyofthemulti-channelLSPTVareenhancedbyoptimizingillumination,flowseeding,imageacquisitionandcorrection,traceridentification,particlematching,andpost-processing.ThecapacityoftheLSPTVwasdemonstratedinthemeasurementofphysicalmodelflowsfortheThreeGorgesProject.