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57 个结果
  • 简介:Thispaperinvestigatesthemathematicfeaturesofnon-linearmodelsanddiscussestheprocessingwayofnon-linearfactorswhichcontributestothenon-linearityofanonlinearmodel.Onthebasisoftheerrordefinition,thispaperputsforwardanewadjustmentcriterion,SGPE.Last,thispaperinvestigatesthesolutionofanon-linearregressionmodelinthenon-linearmodelspaceandmakesthecomparisonbetweentheestimatedvaluesinnon-linearmodelspaceandthoseinlinearmodelspace.

  • 标签: 非线性调节模型 测量误差 精确度 空间非线性模型
  • 简介:与IGS的每日的SINEX文件,IGS车站的时间序列与并列模式在概括网络调整模型下面用一个独立地发达的软件被获得。从时间序列,非线性的运动被发现。与光谱分析方法,地点速度的变化频率(年度时期和一年两次的时期)被发现。而且,车站的速度变化的实验模型被回归分析方法基于车站的每周的答案坐标系列建立了。关于追踪车站的IGS的速度,周期性地为变化建模或用片明智的线性功能而非一个线性变量周期性地给速度估计它的偏爱更好。

  • 标签: IGS测站 非线性变化 光谱分析 经验模型
  • 简介:把早期的运动基于不一致的沉积的机制,拖强迫并且高举力量系数表情为不一致的床材料暴露和靠近的排列状态被提出。不一致的沉积的早期的速度公式然后被建立。公式结构合理、好,这被显示出不一致的沉积的粒子比一样缩放一致粒子的是更困难的设定进运动,而更粗糙的粒子更容易比他们的一致等价物设定进运动。公式的有效性由地和实验数据被验证。

  • 标签: 初始速度 沉淀物 物质分配 河道处理
  • 简介:Thenon-linearloggingparametersinversionisbasedonthefieldtheory,informationoptimizationandpredicationtheory.Itusesseismiccharaoters,geologicalmodelandloggingdataasarestrictiontoinverse2D,3Dloggingparametersdatavolume.Usingthismethod,

  • 标签: 非线性阻塞 参数倒置 地震探测 数据处理
  • 简介:Inthecontextofadvectiondynamics,19experiments(Exps.)areperformedusingaquasi-geostrophicbarotropicvorticityequationmodeltoexploretheconditionforthemergenceofbinaryvorticesandtheself-organizationofthelargerscalevortex.Resultsshowthattheinitialdistancebetweenthecentersofbinaryvorticesandthenon-axisymmetricdistributionsoftheirinitialvorticityaretwofactorsaffectingthemergenceofbinaryvortices.Thereisacriticaldistanceforthemergenceofinitialsymmetricbinaryvortices,however,themergenceofinitialnon-axisymmetricbinaryvorticesisalsoaffectedbytheasymmetricstructureofinitialvortices.Theself-organizationprocessesin19experimentscanbeclassifiedintotwotypes:oneisthemergingofidentical,axisymmetricbinaryvorticesinwhichtheinteractionofthetwovorticesundergoesslowlychange,rapidchange,andtheformation,stretching,anddevelopmentofthefilamentsofvorticity,andthetwovorticesmergeintoasymmetricvortex,withitsvorticitypiledupintheinnerregioncomingfromthetwoinitialvortices,andthevorticityofthespiralbandintheouterregionfromthestretchingofthefilamentsofthetwoinitialvortices.Andtheothertypeisthemergingofthetwonon-axisymmetricinitialvorticesofanellipticvortexandaneccentricvortexinwhichtheellipticvortex,ontheonehand,mutuallyrotates,andontheotherhandmovestowardsthecenterofthecomputationaldomain,atthesametimeexpandsitsvorticityarea,andatlastformstheinnercoreofresultantstatevortex;andtheeccentricvortexmutuallyrotates,meanwhilecontinuouslystretches,andfinallyformsthespiralbandofresultantstatevortex.Theinteractionprocessischaracteristicofthevorticitypiledupintheinnercoreregionofresultantstatevortexoriginatingfromtheellipticvortexandthevorticityinspiralbandmainlyfromthesuccessivestretchandruptureoftheeccentricvortex.

  • 标签: 非轴对称二元旋涡 自组织分析 大气动力学 水平对流
  • 简介:全部的推迟的微粒(TSP)样品沿着Qingdao的海岸在三个地点被收集,中国,在前并且在在2002年3月的主要尘暴期间。为比较,PM_(10)(有空气动力学的直径的微粒物质不到10μm)样品被收集三个地点赎回。词法观察和体积和单个粒子的组合分析被使用扫描与为TSP和PM_(10)的散X光检查系统(SEM/EDX)取样的一个精力装备的电子显微镜学执行。结果证明形态学的不同类型的粒子有类似的形态学的不同元素的作文,而是粒子总是没为非灰尘样品有一样的元素的作文。非灰尘粒子的Themorphology和作文在不同地点是不同的。分数维、球形的粒子为非灰尘样品主要在粗粒级存在,当时在好模式(<10μm)有絮状物,一起结队并且包含外壳的元素的好粒子形成。与非灰尘粒子相比,尘粒以形态学,颗粒大小和作文是更同类的。有andwell分布式的尺寸在灰尘样品统治了的不规则的形状的粒子,包含象Mg那样的外壳的元素,艾尔,Si,Ca,Fe,等等。高硫内容显示了那同类并且多相反应在Qingdao的特定的环境发生在尘粒的表面上。

  • 标签: 气溶胶 颗粒污染物 电子显微镜扫描 灰尘 大气污染
  • 简介:预兆的deconvolution算法(PD)基于秒顺序统计,假设primaries和multiples是含蓄地直角的。然而,地震数据通常不在实践满足这个假设。自从地震数据(primaries和multiples),有non-Gaussian分布,在这篇论文我们在场由最大化恢复primaries的non-Gaussianity的一个改进预兆的deconvolution算法(IPD)。合成、真实的地震数据集上的IPD方法的应用证明建议方法获得有希望的结果。

  • 标签: 预定去卷积 多重稀薄化 地震数据 最大值
  • 简介:Settlingvelocityisafundamentalparameterinsedimenttransportdynamics.ForuniformPar-ticles,thereareabundantformulasforcalculationoftheirsettlingvelocities.Butinnaturalfields,sedi-mentconsistsofnon-uniformparticles.Theinteractionamongparticlesiscomplexandshouldnotbeneg-lected.Inthispaper,basedontheanalysisofsettlingmechanismofnon-cohesiveandnon-uniformparti-cles,atheoreticalmodeltodescribesettlingmechanismisproposed.Besidessuspensionconcentrationandupwardturbulentflowcausedbyotherparticles,collisionamongparticlesisanothermainfactorinflu-encingsettlingvelocity.Byintroducingthecollisiontheory,equationsoffallvelocitybeforecollision,colli-sionprobability,andfallvelocityaftercollisionareestablished.Finally,aformulausedtocalculatetheset-tlingvelocityofnon-cohesiveparticleswithwidegraingradationispresented,whichagreeswellwiththeexperimentaldata.

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  • 简介:Inthisarticle,itispointedoutthattheinformationnon-modifiabilityandinformation“fidelity”involvedin“informationdeterminacy”isamomentousrevolutioninepistemologicalconception.Byeliminatingtheconstrictionofquantitativestability,thereexistpeculiarinformationandperiodicityundernonlinearinstability.ThecommensurabilitybyWengWenbomaybeexplainedbyapplyingspecialcharactersofpeculiarinformation.Onevolutionofsubstance,thegeneralrulesforquantitativeanalysescannotbeextendedintoprocessofpeculiarinformation.Therefore,thecontemporaryscienceshavenotresolvedsomeimportantproblemsinevolutionofsubstancesuchas“time”,peculiarity,non-inertialsystem,andfabricatedinformationinquantitativeanalyses.Thenaturalcharactersandnon-modifiabilityofinformationhaveessentiallyprovedthatitisanepistemologicalmisunderstandingtoconsidertheinformationanalysisinmodern“informationscience”thesameasquantitativeanalysisinthecontemporarysciences.Thatis,“information”cannotbeidenticalto“quantity”.

  • 标签: 信息决策 内容演化 非潮间系统 自然灾害 预测方法
  • 简介:在正常多信道的匹配过滤器使用的过滤器操作员身体上是可实现的。这个过滤器操作符仅仅在过滤进程推迟地震数据。noncausal多信道的匹配过滤器基于一个最少的广场标准被建议解决在哪个预言多重模型数据比真实数据迟了的问题。原因、非原因的多信道的匹配过滤器之间的差别用一个合成射击集合被比较,它表明非原因的匹配过滤器的有效性。另外,滑动随着偏移量和层速度变化的窗户的可变长度被建议解决与在滑动窗户的固定长度增加偏移量增加的事件的计数。滑动窗口的这可变长度也被介绍进修改并且膨胀的多信道的匹配过滤器。这个方法被用于Pluto1.5合成数据集合。非原因的过滤器操作符和可变长度滑动窗户的好处被好多重变细结果表明。

  • 标签: 匹配滤波器 滑动窗口 减法 最小二乘准则 多次波衰减 过滤器
  • 简介:Basedontheanalysisoftropicalcyclone(TC)databaseintheNorthwestPacific(NWP)from1945to2008,wenotonlyextractthetemporalvariationofTCintensityandfrequency,butalsogivetheirspatialdistributionbothintheNWPandintheSouthChinaSea(SCS).TheresultsshowthatthereisanobservationalincreaseofTCactivities,whichmanifestsastheenhancementofthepowerdissipationindex(PDI)andthegrowthofTCfrequency,especiallyfortyphoonsandstrongtyphoons.TheinhomogeneousspatialdistributionsofTCfrequencyandintensityarealsoprovidedbothintheNWPandintheSCS.Forexample,theregionofZhongshaIslandsandDongshaIslandsintheSCS(15°~22°N,115°~120°E),westtothePhilippineIslandsistheplacewithfrequentoccurrenceofstrongtyphoons,amongwhichthewindspeedof7TCsin64yearsexceeds60m/s.

  • 标签: 热带气旋活动 西北太平洋 非平稳 东沙群岛 南海地区 空间分布
  • 简介:假设那床材料负担等于沉积运输能力通常是可接受的,如果在床和流动之间的交换即刻地发生。为非平衡沉积运输过程,然而,有空间、时间的延期效果。这为水库沉积过程是特别真的。恢复因素是为非平衡沉积运输的一个系数。恢复因素的决心能试验性地或数字地被获得。在以前的文学的恢复因素的价值上没有一致。有半的数字模拟--二个维的沉积运输模型,GSTARS4,为以前的研究建议的恢复因素的决心用各种各样的方法在这研究被进行。一座水库的模仿的结果几何变化对恢复因素的选择敏感。恢复因素作为沉积尺寸的功能提供了最合理的结果,这被发现。在恢复因素和沉积尺寸之间的一种功能的关系被比较模仿并且测量的水库决定几何变化。粗糙的沉积有恢复因素的小价值。

  • 标签: 数值模拟 采收率 非均衡 水库泥沙淤积 沉降 油藏
  • 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:Unsteadymotionofaverticallyfallingnon-sphericalparticlehasattractedconsiderableattentionduetoitsfrequentapplicationsinnatureandindustry.Aseriesofsemi-analyticalmethodshavebeenusedtoraisetheresults’accuracyaswellaswideningtheregionofconvergence.Thecurrentstudypursuedanewanalyticalsolutionfortheunsteadymotionofarigidnon-sphericalparticleinaquiescentNewtonianfluid,basedontheOptimalHomotopyAnalysisMethod.Withaviewtowardsobtainingthehighestlevelofaccuracyandensuringtheconvergenceoftheanalyticalresults,theaveragedresidualerrorswereobtainedandminimized.Inadditiontoflexibility,itwasalsoproventhattheproposedmethodcanleadtocompletelyreliableandpreciselyaccurateresults.Basedontheseriessolution,theeffectsofphysicalparametersontheterminalsettlingvelocity(i.e.thegreatestvelocitythatafallingbodymayreach)andtheaccelerationtime(i.e.thetimethataparticlereachesthesettlingvelocity)areinvestigated.

  • 标签: 非球形颗粒 粘性流体 非定常运动 沉降速度 加速时间 牛顿流体
  • 简介:这份报纸建议我们叫作鈥渟egregated预言鈥?预言是nonstationary的气候时间系列的一条新途径。这条途径基于实验模式分解方法(EMD),它能分解一时间信号进基本摆动的部件的一个有限、通常小的数字。到这的能力接近的测试,一些预言实验为几个气候时间系列被执行。试验性的结果证明这条途径能分解气候时间系列的nonstationarity并且分离在不同模式部件之间的非线性的相互作用,它从而能改进这些原来的气候时间系列的预言精确性。关键词EMD-nonstationarity-非线性的系统-气候预言-时间系列预言

  • 标签: 非平稳时间序列 经验模式分解 气候预测 序列预测 非线性相互作用 隔离元件
  • 简介:Thedeep-seafloorimagesareacquiredundernon-uniformillumination,theeffectsofwhichbringupmanydifficultiesforimagesegmentation.Thepapercomparesthreemethodsofremovingnon-uniformilluminationeffects.Theeffectivenessandrobustnessareevaluatedonthreetestimageswithhigh-,moderate-andlow-densitygrains,respectively.Theresultsshowthatlocalfilteringalgorithmdoesnotremovethenon-uniformilluminationeffectscompletely.Theimagesubtractingalgorithmwilllosesomeofthedynamicrangeoftheoriginaldata.Theenhancedimagestretchingalgorithmisthemosteffectiveone.

  • 标签: 深海海底照明 非均匀照明效应 自适应滤波
  • 简介:Whenoneendofanair-dryigneousrockblockwasuniaxiallyloadedinlaboratory,thereappearedanelectromotiveforcethatmadeelectriccurrentsflowfromthestressedvolumetotheunstressedvolume.Quartz-freerockssuchasgabbroalsogeneratedthisforce,strongerthanquartz-bearingrockssuchasgranite.Thisindicatesthatthepiezoelectriceffectofquartzandtheelectrokineticeffectofporewaterdonotmakealargecontributiontowardgeneratingtheelectromotiveforce.Wefocusonperoxybondthatisoneoftheabundantlatticedefectsinigneousrock-formingminerals.Whenmechanicalloadingdeformsthelatticestructurearoundthisdefectandbreaksitsbond,itsenergylevelschangeandactlikeanaccepter.AsanelectronistrappedatthisdefectfromaneighborO2-site,apositiveholeisactivatedthere.Theyattempttodiffusetowardtheunstressedvolumethroughthevalencebandandaresimultaneouslyaffectedbytheattractiveelectricforcewiththeelectronstrappedinperoxybonds.Thisleadstoapolarizationinthestressedvolumeandthegenerationofelectromotiveforcebetweenthestressedandunstressedvolumes.SimilarelectromotiveforcemaybegeneratedintheEarth’scrustwhereinhomogeneousstress/strainischanging.

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