简介:一个修订实验模型为作为两回答的一个函数预言导致液化的侧面的传播排水量(LD)被开发了光谱从YoudsLD数据从强壮运动的变细模型和geotechnical参数导出的加速设定(Youd网站)。这个修订模型与张和赵的模型不同,它为预言侧面的传播克服了更早的模型的一些缺点并且首先在日本和西方的美国被使用如果摇晃扎根,修订模型能潜在地被使用在任何地方(以5%抑制加速或排水量反应系列)能用本地强壮运动的变细关系被估计。修订模特儿从日本和西方的美国用数据被检查并且适用于土耳其和新西兰,在扎根的摇晃为每个区域用适当强壮运动的变细关系被估计的地方。修订模型的精确性被把它的预言的侧面的排水量与那些在实际地震测量了作比较评估。结果证明修订模型能在侧面的传播排水量上说明本地seismicity的效果并且与存在预言模型一起是可比较的。
简介:这份报纸为不一致的自然沉积混合物的运输以中部的谷物尺寸和有效沉积尺寸评估代表性的沉积尺寸的适用性。来自Krasak河的自然沉积,Yogjakarta被使用。床样品从三不同的河节被收集,即在上游的(U),中流(M)和下游的(D)。中部的直径,d50和沉积几何标准差,为节U,M和D的g是1.63公里,0.91公里和0.69公里,并且4.8,2.3和1.5分别地。特别注意对在阀值沉积运动上改变代表性的沉积尺寸的效果被给予,在四个阀值方程被采用的地方。当时,阀值价值变化g=4.8g=4.8并且与g<2.4g<2.4。分析用有或没有沉积运动的阀值标准说明两个的八个选择公式被扩大到水流带来的碎石运输的预言。到为床材料的不一致的报道,当时,在用d50的计算水流带来的碎石分泌物之间的比较与水流带来的碎石预言被做代表性的沉积直径被使用。当有效沉积尺寸为不一致的沉积混合物被采用时,统计分析的改进仅仅为预言被观察的分析表演计算了使用Brownlie(1981)和Camenen和Larson(2005)表情。采用有效沉积缩放de或d计算水流带来的碎石分泌物的他们未必确实改进水流带来的碎石预言,d50的使用被看作足够。
简介:Thispaperfirstproposesanewapproachforpredictingthenonlinearwavetroughdistributionsbyutilizingatransformedlinearsimulationmethod.ThelinearsimulationmethodistransformedbasedonaHermitetransformationmodelwherethetransformationischosentobeamonotoniccubicpolynomialandcalibratedsuchthatthefirstfourmomentsofthetransformedmodelmatchthemomentsofthetrueprocess.TheproposednewapproachisappliedforcalculatingthewavetroughdistributionsofanonlinearseastatewiththesurfaceelevationdatameasuredatthecoastofYuraintheJapanSea,anditsaccuracyandefficiencyareconvincinglyvalidatedbycomparisonswiththeresultsfromtwotheoreticaldistributionmodels,fromalinearsimulationmodelandasecondordernonlinearsimulationmodel.Finally,itisfurtherdemonstratedinthispaperthatthenewapproachcanbeappliedtoallthesituationscharacterizedbysimilarnondimensionalspectrum.
简介:Themodelingandpredictionofsuspendedsedimentinariverarekeyelementsinglobalwaterrecoursesandenvironmentpolicyandmanagement.Inthepresentstudy,anAdaptiveNeuro-FuzzyInferenceSystemmodeltrainedwiththeLevenberg-Marquardtlearningalgorithmisconsideredfortimeseriesmodelingofsuspendedsedimentconcentrationinariver.ThemodelistrainedandvalidatedusingdailyriverdischargeandsuspendedsedimentconcentrationdatafromtheSchuylkillRiverintheUnitedStates.TheresultsoftheproposedmethodareevaluatedandcomparedwithsimilarnetworkstrainedwiththecommonHybridandBack-Propagationalgorithms,whicharewidelyusedintheliteratureforpredictionofsuspendedsedimentconcentration.ObtainedresultsdemonstratethatmodelstrainedwiththeHybridandLevenberg-Marquardtalgorithmsarecomparableintermsofpredictionaccuracy.However,thenetworkstrainedwiththeLevenberg-MarquardtalgorithmperformbetterthanthosetrainedwiththeHybridapproach.
简介:Thespatialtemporalevolutioncharacteristicsoftheload/unloadresponseratio(LURR)anditsimplicationsforpredictingthethreeelementso...
简介:TheresistivityexperimentalmeasurementsofcoresamplesdrilledfromlowpermeabilityreservoirsofOrdosBasin,NorthwestChina,illustratethatthecementationfactorsarenotagminate,butvaryfrom1.335to1.749.Thisleadstoachallengefortheestimationofwaterandhydrocarbonsaturation.BasedontheanalysisofPurcellequationandassumptionthatrockresistivityisdeterminedbytheparallelconnectionofnumerouscapillaryresistances,atheoreticalexpressionofcementationfactorintermsofporosityandpermeabilityisestablished.Then,cementationfactorcanbecalculatediftheparametersofporosityandpermeabilityaredetermined.Inthefieldapplication,porositycanbeeasilyobtainedbyconventionallogs.However,itisatoughchallengetoestimatepermeabilityduetothestrongheterogeneityoflowpermeabilityreservoirs.Thus,theSchlumbergerDollResearch(SDR)modelderivedfromNMRlogshasbeenproposedtoestimatepermeability.BasedontheanalysisofthetheoreticalexpressionsofcementationfactorandSDRmodel,anovelcementationfactorpredictionmodel,whichisrelevanttoporosityandlogarithmicmeanofNMRT2spectrum(T2lm),isderived.TheadvantageofthismodelisthatalltheinputinformationcanbeacquiredfromNMRlogsaccurately.Inordertoconfirmthecredibilityofthenovelmodel,theresistivityandcorrespondinglaboratoryNMRmeasurementsof27coresamplesareconducted.Thecredibilityofthemodelisconfirmedbycomparingthepredictedcementationfactorswiththecoreanalyzedresults.Theabsoluteerrorsforallcoresamplesarelowerthan0.071.Oncethismodelisextendedtofieldapplication,theaccuracyofwaterandhydrocarbonsaturationestimationwillbesignificantlyimproved.
简介:AnapproachisproposedforpredictingturningandaccelerationmotiontrendofthetropicalcyclonesovertheSouthChinaSeafor72hintheextrapolatedtrackcoordinates.Cross-track(CT)andalong-track(AT)componentsaredefinedaccordingtothepersistentlyextrapolatedtrackcoodinatesbasedonobservedpositionsattheinitialandpast24htimes.Akindofstraight-forwardmeasuremaybeprovidedwithCTandATcomponentsfortyphoonturningmotionandac-celerationmotion.Canonicalcorrelationanalysis(CCA)isperformedtorevealthecorrelaotionsbe-tweentropicalcyclonetracksandenvironmental500hPageopotentialheightfields.Astepwisedis-criminateanalysistechniqueisadoptedtoderivetheclassificationfunctionsoftherespectivethreecategoriesforATandCTcomponents.Especially,categoricalcombinationsofCTandATcompo-nentsaredividedintopossible9regionscorrespondingwithtropicalcyclonebehaviors.Notonlycan9motiontrendsofatropicalcyclonebepredicted,butalsothelocationanditsmaximumerroratleastincertaindirectionareavailable.Theperfectprediction(PP)verificationsindicatethatthepercentcorrectsfortheCTandATcategoriesare67%and69%intheindependentsamples,73%and53%inthedependentsamples,respectively,higherthanthatof33.3%forrandomchance;moreover,therateforsuccessfullyforecastingthatinwhichoneofthenineregionsthetropicalcy-cloneswillfallat72hisabout40%,alsohigherthanthestochasticprobabilityof11%.Themethodhasbeenprovedtobeskillfulandpromising.
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