简介:Thestabilityofriverbankssubjecttoseepageisstudiedexperimentallyandtheoreticallyinthispaper.Byincludingseepageina3-dimensionaltheoreticalanalysis,thestudyfirstshowshowthecriticalslopeorangleofreposeofacohesionlessmaterialisrelatedtotheratioofthehydraulicgradientofseepagetoitscriticalvalueunderthefluidizationcondition.Thecriticalstableslopeisshowntoberelatedtonotonlythehydraulicgradientbutalsotheseepagedirection.Measuredlaboratorydatareasonablyfitwellwiththetheoreticalrelationshipforthecaseofinjectionandsuction.Thedatarevealthattheslopeisreducedwithinjectionandincreasedwithsuction,respectively.Additionally,thestudyidentifiestheseepagedirectionwhichresultsinaminimumcriticalstableslopeforacertainhydraulicgradientofseepage.
简介:TheChi-Chiearthquakein1999causeddisastrouslandslides,whichtriggerednumerousdebrisflowsandkilledhundredsofpeople.Acriticalrainfallintensitylineforeachdebris-flowstreamisstudiedtopreventsuchadisaster.However,settingrainfalllinesfromincompletedataisdifficult,sothisstudyconsideredeightcriticalfactorstogroupstreams,suchthatstreamswithinaclusterhavesimilarrainfalllines.Ageneticalgorithmisappliedtogroup377debris-flowstreamsselectedfromthecenterofanareaaffectedbytheChi-Chiearthquake.Thesestreamsaregroupedintosevenclusterswithdifferentcharacteristics.Theresultsrevealthattheproposedmethodeffectivelygroupsdebris-flowstreams.
简介:自由民建议的光线的基础功能(RBF)插值途径被用来解决遇到在的反的问题记载得好并且另外的petrophysical问题。途径是根据物理岩石数据集在实验室预言petrophysical性质,它包括形成因素,粘性,渗透,和分子的作文。然而,这条途径不在插值结果上考虑刻度数据的空间分发的效果。这研究基于自由民RBF插值途径,联合起来的基础功能一致地被在空间领域占据建议一条新RBF插值途径。二条途径的反的结果被使用我们的数据集比较地分析。我们决定尽管二条途径的插值效果是相等的,新途径为当数据库大时,减少基础函数的数字更灵活、有益,导致插值函数表达式的简化。然而,当数据簇是差距很大的时,中央数据的预言的结果足够地没满足。
简介:Insteady,solid-liquidtwo-phaseturbulentflows,thereexisttwotypicalpatternsoftheverticaldistributionofparticleconcentration.ThepatternIshowsamaximumconcentrationatanelevationabovethebed.ThepatternIIshowsanincreaseoftheparticleconcentrationdownwardoverthewholevertical,withthemaximumatthebed.MostofthetheoriesonparticleconcentrationdistributionhavebeendonewiththepatternII,anditislackofasuccessfultheorycovetingbothofthetwopatterns.Thispaperreviewstheparticledistributiontheories,includingthediffusiontheory,themixturetheory,theenergytheory,thesimilaritytheory,thestochastictheoryandthekinetictheory.Thekinetictheoryisalsoappliedtodescribetheverticaldistributionofparticleconcentrationinbothdiluteanddenseflows.
简介:在这份报纸,我们关于天气数据和S.C在一仅仅方向鈥?总结洗碗盆实验,物质转的原则,和鈥渞etrograde波浪的科学基础的特征。在气象学的理论的基本问题在被指出的OuYang鈥檚文章。而且,我们讨论包含那种物质发展的概念,理论,和方法的系统的变化。关键词后退在仅仅一个方向的波浪-洗碗盆实验-埃迪电流-首先演变作者陈刚义是信息技术,卫星遥感的一个成员与京族气象学社会的气象学委员会的Chengdu大学的研究人员,地质学的副秘书长和中国地点统计社会的气象的委员会。他做我在进化科学理论和空间遥感信息和它的申请的不规则的基础信息上研究到灾难天气并且为中国发现的国家鈥檚天赋科学的几个科学研究工程负责,国家鈥檚优先级的工程研究,国家鈥檚优先级基本R与D节目,和国家鈥檚气象学科学资助。他为国家鈥檚鈥淓ighth的重要结果赢得了奖金--从在1996的中国科学院的科学的五鈥?和技术节目和科学、工艺的进步。
简介:随机的地震倒置是geostatistics和从地震记录,井木头,和geostatistics把信息集成到表面下的模型的以后的概率密度功能(PDF)的地震倒置技术的联合。Markov链蒙特卡罗(MCMC)方法被用来取样以后的PDF,表面下的模型特征能被分析推断一套以后的PDF样品。在这份报纸,我们首先介绍随机的地震倒置理论,讨论并且分析四个关键参数:地震数据signal-to-noise比率(S/N),variogram,以后的PDF样品数字,和井密度,并且建议这些参数的最佳选择。分析结果证明地震数据S/N调整在地震数据的影响之间的妥协,倒置上的geostatistics结果,variogram控制倒置结果的光滑,以后的PDF样品数字决定统计特征的可靠性源于样品,并且很好,密度影响倒置无常。最后,在随机的地震倒置之间的比较和确定的模型基于地震倒置显示随机的地震倒置能提供表面下的特性的更可靠的信息。
简介:Inthispaper,anewconceptcallednumericalstructureofseismicdataisintroducedandthedifferencebetweennumericalstructureandnumericalvalueofseismicdataisexplained.Ourstudyshowsthatthenumericalseismicstructureiscloselyrelatedtooilandgas-bearingreservoir,soitisveryusefulforageologistorageophysicisttopreciselyinterprettheoil-bearinglayersfromtheseismicdata.Thistechnologycanbeappliedtoanyexplorationorproductionstage.ThenewmethodhasbeentestedonaseriesofexploratoryordevelopmentwellsandprovedtobereliableinChina.Hydrocarbon-detectionwiththisnewmethodfor39explorationwellson25structuresindicatesasuccessratioofover80percent.Thenewmethodofhydrocarbonpredictioncanbeappliedfor:(1)depositionalenvironmentofreservoirswithmarinefacies,delta,ornon-marinefacies(includingfluvialfacies,lacustrinefacies);(2)sedimentaryrocksofreservoirsthatarenon-marineclasticrocksandcarbonaterock;and(3)burialdepthsrangefrom300mto7000m,andtheminimumthicknessofthesereservoirsisover8m(mainfrequencyisabout50Hz).
简介:当前的学习为词法床变化的预言集中于一个三维的数字模型的申请。在一座水库的沉积免职在10-year-flood期间被调查,模拟的结果被验证,数据源于物理模型研究。因为在原型的小谷物尺寸,合成成粒在物理模型被使用。数字计算领域是物理模型的繁殖,包括谷物尺寸和粒子的密度,以便保证相似性。CFD代码SSIIM,它解决跑方程在三尺寸,被用于模拟。在SSIIM的沉积运输被划分成推迟的沉积运输,由解决传送对流散开方程,和水流带来的碎石运输计算了,由一个实验公式计算。数字模拟的结果对应于很好物理模型学习的结果。模仿的地点和在水库的沉积免职的模式是在物理模型的观察分发的一个精确代表。
简介:ResearchwascarriedoutattheUniversityofKarlsruheinthelast10yearstomodifyexistingformulasandimproveourknowledgeonthedeterminationofthestabilityofstreambedsconsistingofgravelsandstones.StreamsinthemiddlemountainregionwithtypicalslopesofI=0.05%to0.8%aswellasthosewithdistinctstep-poolstructuresandslopesofI>4%andI≤10%wereinvestigated.MostoftheexperimentswereconductedintheTheodor-RehbockLaboratory.However,someoftheresultsthathadbeenobtainedunderlaboratoryconditionscouldbeverrifiedwithexistingfielddata.Inthefollowing,theresultsandformulasofpracticalimportancewillbeintroducedanddiscussed.
简介:在固体和液体之间的批评粒子尺寸的决心分阶段执行,即,暂停胜任,为碎片流动是基本的。为基于粒子尺寸分析决定暂停胜任的一个方法在这份报纸被介绍。与Jiangjia溪谷的沉积准备的静态的试验性的水碎片混合物的暂停胜任是~0.025公里如果体积密度是不到1,800kg,m3和它与更多的集中的混合物的体积密度增加。在Jiangjia溪谷的自然碎片流动的暂停胜任与体积密度指数地增加。这二个数据集合被比较以便理解暂停机制。骚乱可以在粒子暂停起主要作用在,这被结束非粘滞并且亚viscous碎片流动,当时在里面粘滞两矩阵力量和过量毛孔浇的碎片流动迫使玩重要角色。
简介:Theresponseofsedimentdischargeratetothefollowingfourecohydrologicalfactors:temperature,rainfall,evapotranspiration(ET),andstreamflowwasevaluatedbyconductingwaveletanalysisonLuergousmallcatchmentdatarangingfrom1982to2000.Forsedimentdischargerate,therewasanoveralltrendofreductionthatincludedaperiodicoscillationof6to7yearspercycle.Rainfallalsohadanoveralltrendofreductionthatincludedtwoperiodicoscillationsof7yearspercycleand2yearspercycle,respectively.Streamflowhadthesametrendasrainfallbuthadoneperiodicoscillationof6to7yearspercycle.Incontrastwithrainfallandstreamflow,thetrendsfortemperatureandETeachshowedanoverallincreasingtendency,andbothhadthesametwoperiodicoscillationsof6to7yearspercycleand4yearspercycle,respectively.Thesedimentdischargeratehadsignificantrelationshipswiththefourecohydrologicalfactors,withstreamflowandrainfallhavingpositivecorrelations,whileETandtemperaturehadnegativecorrelations.ThecorrelationbetweenETandsedimentdischargeratebecamestrongerwhenETwascomparedtothesedimentdischargerateofthefollowingyear.Therelationshipbetweensedimentdischargerateandthefourecohydrologicalfactorswasfurtherexpressedbythemulti-linearregressionmodelthatwasconstructed,whichmakessedimentdischargerateafunctionofstreamflow,rainfall,ET,andtemperature.
简介:ThispaperpresentsthenumericalinvestigationofthedistributionofinertialsedimentparticlesintheturbulentboundarylayerofanopenchannelflowwiththeparticleStokesnumberrangingfrom0.6to20.4.Themethodologyisacombinationofthreenumericalapproaches,i.e.directnumericalsimulationofturbulentflow,thepoint-particleimmersedboundarymethod,andthediscreteparticlemethod.ByapplyingtheVorono?analysis,thepreferentialconcentrationcharacteristicsofsedimentparticleswereinvestigatedquantitatively.ItwasfoundthatthenormalizedareaoftheVorono?cellsfollowsalognormalparticledistribution.Theinertialsedimentparticlesdistributedunevenlyintheturbulentboundarylayerandtheunevenness,governedbytheparticleStokesnumber,wasmoresignificantastheparticleStokesnumberapproachesunity.Theinertialsedimentparticlesintheturbulentboundarylayeraccumulatedpreferentiallyinstreamwise-alignedstreakystructuresandthispatternwaslesssignificantwithincreasingparticleStokesnumber.