简介:高分辨率3D非线性的综合倒置方法基于非线性的理论。在层控制下面,从几口井的日志数据(或所有井)在学习区域和地震踪迹,邻近井的数据是到有多重输入和产量的一个网络的输入并且综合地被训练获得全部学习区域的一个适应重量函数。综合非线性的印射关系被水库的侧面、垂直的地质的变化造并且更新。因此,倒置过程和它的倒置结果能被抑制并且控制并且有有速度倒置,阻抗倒置,和密度倒置节的高分辨率的稳定的地震倒置节,能被获得。好地质的效果在模型计算测试并且真实数据处理被获得了,它证实这个方法让高精确,好实物,和罐头被用于量的水库分析。
简介:Sequentialmeasurementprocessingisofbenefittobothestimationaccuracyandcomputationalefficiency.Whenthenoisesarecorrelatedacrossthemeasurementcomponents,decorrelationbasedoncovariancematrixfactorizationisrequiredinthepreviousmethodsinordertoperformsequentialupdatesproperly.Anewsequentialprocessingmethod,whichcarriesoutthesequentialupdatesdirectlyusingthecorrelatedmeasurementcomponents,isproposed.Andatypicalsequentialprocessingexampleisinvestigated,wheretheconvertedpositionmeasurementsareusedtoestimatetargetstatesbystandardKalmanfilteringequationsandtheconvertedDopplermeasurementsarethenincorporatedintoaminimummeansquarederror(MMSE)estimatorwiththeupdatedcross-covarianceinvolvedtoaccountforthecorrelatederrors.Numericalsimulationsdemonstratethesuperiorityoftheproposednewsequentialprocessingintermsofbetteraccuracyandconsistencythantheconventionalsequentialfilterbasedonmeasurementdecorrelation.
简介:Inthispaper,perturbationmethodandFourier-cosine-expansionmethodareusedtosolvea3-DnonlinearproblemofasupercavitatingflowinaninclinedfieldofgravityatlargeFroudenumbers.Byexpandingthevelocitypotentialintoapowerseriesofasmallparameter,theoriginal3-Dnonlinearproblemisreducedtoanumberof2-Dones.Thesolutionsofthefirstthreeordersarederivedindetailandexpressedintermsofthecompleteellipticintegralsofthefirstandsecondkinds.Thentheboundaryintegralequationmethodisappliedtogetthenumericalsolutionsforeachorder.Computationalresultsareprovidedforsupercavitatingflowspastconesundervariousflowconditions.
简介:Atheoreticalmodelofanonlinearhyperbolicmetamaterialispresentedintheformofastackofsubwavelengthlayersoflinearplasmonicandnonlineardielectricmaterials.Abroadpictureofthepropertiesofevanescentwaves(high-kmodes)inthisstackisinvestigatedbyplottingglobaltransmissiondiagrams.Thepresenceofnonlinearitystronglymodifiesthesediagrams.Theemergenceandmodificationofnonlinearevanescentwavesisobserved.Somesignaturesofnonlinearphenomenonsuchasformationoforbitsandtrajectoriesaroundfixedpointsarealsoseeninourwork.
简介:InthispaperweproposeamodificationoftheLandweberiterationtermedfrozenLandweberiterationfornonlinearill-posedproblems.Aconvergenceanalysisforthisiterationispresented.ThenumericalperformanceofthisfrozenLandweberiterationforanonlinearHammersteinintegralequationiscomparedwiththatoftheLandweberiteration.WeobtainashorterrunningtimeofthefrozenLandweberiterationbasedonthesameconvergenceaccuracy.
简介:Thispapersetupaclassofnonlinearsemi-discreteage-structuredmodelofpopulationevolutionsystem,byusingtheconceptofcriticalproliferationrate,itdiscussedthestabilityoflinearandnonlinearpopulationsystem,anditobtainthesufficiencyconditionsofthestablefornonlinearsemi-discretesystem.
简介:Twocomplexproperties,varyingtime-delayandblock-orientednonlinearity,areverycommoninchemicalengineeringprocessesandnoteasytobecontrolledbyroutinecontrolmethods.Aimedatthesetwocomplexproperties,anoveladaptivecontrolalgorithmthebasisofnonlinearOFS(orthonormalfunctionalseries)modelisproposed.First,thehybridmodelwhichcombinesOFSandVolterraseriesisintroduced.Then,astablestatefeedbackstrategyisusedtoconstructanonlinearadaptivecontrolalgorithmthatcanguaranteetheclosed-loopstabilityandcantrackthesetpointcurvewithoutsteady-stateerrors.Finally,controlsimulationsandexperimentsonanonlinearprocesswithvaryingtime-delayarepresented.Anumberofexperimentalresultsvalidatetheefficiencyandsuperiorityofthisalgorithm.
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简介:Location of Tibetan earthquakes──a nonlinear approach by a simplex optimized technique(赵珠)(丁志峰)(易桂喜/)(王建格)LocationofTibetanea...
简介:ThispaperisconcernedwiththeexistenceandthenonlinearasymptoticstabilityoftravelingwavesolutionstotheCauchyproblemforasystemofdissipativeevolutionequations{ξt=-θx+βξxx,θt=vξx+(ξθ)x+αθxx,withinitialdataandendstates(ξ,θ)(x,0)=(ξ0,θ0)(x)→(ξ±,θ±)asx→±∞.Weobtaintheexistenceoftravelingwavesolutionsbyphaseplaneanalysisandshowtheasymptoticnonlinearstabilityoftravelingwavesolutionswithoutrestrictionsonthecoefficientsαandvbythemethodofenergyestimates.
简介:有在兴趣的一个区域的类似的特征的不同seismo构造的事件的鉴定和分类是在地震危险研究的最重要的题目之一。在这研究,线性、非线性的判别式分析被使用了在伊斯坦布尔的附近分类地震事件。数字速度震动图的垂直部件与发生在2001和2004之间的在1.8和3.0之间的大小(Md)被用于地震事件。二,时间依赖者参数,复杂性和S/P山峰振幅比率作为predictands被选择。线性,二次,diaglinear和diagquadratic判别式功能被调查。方法与的精确性一另外的调整二次的模型是96.6%,96.6%,95.5%,96.6%,和97.6%,分别地与为每个班的各种各样的分类的率。模型的表演与生气确认和替换错误被认为正当。尽管所有模型很好显著地表演了,调整二次的功能从179与就4个分类事件完成了最好的成功率,与复杂方法例如相比甚至更好,自我组织方法,k工具,在文学适用于一样的数据集的Gaussion混合模型。