简介:ThereisagoodcorrelationbetweenanomalousSchumannresonanceandseismicactivities.Pre-earthquakeanomalousSchumannresonanceisanimportantmanifestationofLAIC(Lithosphere-Atmosphere-IonosphereCoupling),whichisprobablyassociatedwithseismicionosphericdisturbance.TheobservationsystemparametersoftheYunnanSchumannresonancemonitoringstationsandtheresultsofstatisticalandseismiccasesanalysisareintroducedinthispaper.ThreedaysbeforetheMarch10,2011MS5.8Yingjiangearthquake,anomalousSchumannresonanceintheBycomponent(E-W)wasobservedbyYongshengstation,andtwodaysbeforetheLincangMS4.0earthquakeofJanuary23,2011,anomalousSchumannresonanceintheBycomponentwasdetectedbythesamestation.SpectrumanalysisresultsontheBycomponentobservationsofTonghaistationshowthatstrongdisturbanceswereobservedinspectraldensitycorrespondingtothefirstthreeSchumannresonantfrequenciesontheverydayoftheMS4.2HongheearthquakeofMay22,2011.ResearchshowsthatSchumannresonancemonitoringisafeasiblemethodforseismic-electromagneticprecursorsmonitoring.
简介:Tectonicoreformationisthercsultoftcctonicmovementincombinationwithore-formingmaterjalmovementintheprecessofcru8talevolutlonandtectonicdevelopmcnt.Oreformationjsconditionedbythelawgovcrningmobile-8tabletransformationincrustalcvolutionshowsanorderinmetallogenicevo-lution,regionaidistributionofgolddepo
简介:TheNorthYellowSeaBasin(NYSB),whichwasdevelopedonthebasementofNorthChina(Huabei)continentalblock,isatypicalcontinentalMesozoic-Cenozoicsedimentarybasinintheseaarea.ItsMesozoicbasinisaresidualbasin,belowwhichthereisprobablyalargerPaleozoicsedimentarybasin.TheNorthYellowSeaBasincomprisesfoursagsandthreeuplifts.Ofthem,theeasternsagisaMesozoic-CenozoicsedimentarysaginNYSBandhasthebiggestsedimentthickness;thecurrentKoreandrillingwellsareconcentratedintheeasternsag.Thissagiscomparativelyrichinoilandgasresourcesandthushasarelativelygoodpetroleumprospectinthesea.ThecentralsaghasalsoaccommodatedthickMesozoic-Cenozoicsediments.ThelatestresearchresultsshowthattherearethreeseriesofhydrocarbonsourcerocksintheNorthYellowSeaBasin,namely,blackshalesofthePaleogene,JurassicandCretaceous.TheprincipalhydrocarbonsourcerocksinNYSBaretheMesozoicblackshale.AccordingtothedrillingdataofKorea,theblackshalesofthePaleogene,JurassicandCretaceoushaveallcomeuptothestandardsofgoodandmaturesourcerocks.TheNYSBownsanintactsystemofoilgeneration,reservoirandcappingrocksthatcanhelphydrocarbontoforminthebasinandthusithasthegreatpotentialofoilandgas.TheverticaldistributionofthehydrocarbonresourcesismainlyconsideredtobeintheCretaceousandthenintheJurassic.
简介:ByusingthetheoriesonStokesmulticoloredwaterwavesandtakingthetwo-layeroceanasabasicmodelofstratifiedocean,thepaperanalyzestheproblemsrelatedtotheeffectsofthenonlinearwaterwaveonoffshorestructures.Amathematicalexpressionispresentedtodescribesecondorderwaveradiationconditions.Usingintegralprinciple,theanalyticalintegralsolutionsaregiventoevaluatesecondorderscatteredwaveloadsongeneralverticalcircularcylindersinthetwo-layerocean,andthespecialrecurrenceformulasforinfiniteintegralsoverfreeandstratifiedsurfacesarederived.
简介:Common-reflection-point(CRP)集合是连接地震数据和petrophysical参数的一座桥。预先叠属性抽取并且预先叠倒置,他们俩是水库预言的重要工具。CRP集合的质量通常在地震探索的精确性上有大影响。因此,预先叠CRP集合噪音抑制技术成为一个主要研究方向。基于向量分解原则,这里,我们建议一个方法压制噪音。这个方法由在各种各样的方向寻找估计最佳的单位向量然后通过向量角度变光滑和限制压制噪音。模型测试显示建议方法能把有效信号与噪音分开很好并且在单个wavenumber大小写中有效地压制随机的噪音。我们到真实数据的方法的申请证明方法能恢复有效信号,好振幅保存了从预先叠甚至在到噪音比率(SNR)的低信号的情况中的吵闹的地震数据。
简介:Throughtheanalysisoftheprinciple,errorsourcesandprecisionoftrigonometricleveling,thispaperpointsoutthekeyproblemsaboutfirstorderlevelingreplacedbytrigonometricleveling;andforthefirsttimeputsforwardthat,insomegivenconditions,itisnotonlyfeasiblebutalsovaluabletoreplacefirstorderlevelingbyprecisetrigonometricleveling,andprovesitbyexperimentationaswell.Thecontentandconclusionofthispaperhaveconsultingsignificanceandpracticablevalueforoursettingdownrelationalcriterionandproductionpractice.
简介:Theobjectiveofthisstudyistoidentifysystemparametersfromtherecordedresponseofbaseisolatedbuildings,suchasUSChospitalbuilding,duringthe1994Northridgeearthquake.Fullstatemeasurementsarenotavailableforidentification.Additionally,theresponseisnonlinearduetotheyieldingofthelead-rubberbearings.Twonewapproachesarepresentedinthispapertosolvetheaforementionedproblems.First,areducedorderobserverisusedtoestimatetheunmeasuredstates.Second,aleastsquarestechniquewithtimesegmentsisdevelopedtoidentifythepiece-wiselinearsystemproperties.Theobserverisusedtoestimatetheinitialconditionsneededforthetimesegmentedidentification.Aseriesofequivalentlinearsystemparametersareidentifiedindifferenttimesegments.Itisshownthatthechangeinsystemparameters,suchasfrequenciesanddampingratios,duetononlinearbehaviorofthelead-rubberbearings,arereliablyestimatedusingthepresentedtechnique.Itisshownthattheresponsewasreducedduetoyieldingofthelead-rubberbearingsandperiodlengthening.
简介:-Forthediscretizationofhigherorderelements,thispaperpresentsamodifiedintegraldomainmethodtoremovetheirregularfrequenciesinheritedintheintegralequationofwavediffractionandradiationfromasurface-piercingbody.Thesetofover-determinedlinearequationsobtainedfromthemethodismodifiedintoanormalsetoflinearequationsbysuperposingasetoflinearequationswithzerosolutions.Numericalexperimentshavealsobeencarriedouttofindtheoptimumchoiceofthesizeoftheauxiliarydomainandthediscretizationonit.
简介:基于散布途径的连续顺序,为垂直地不同类的飞机平行媒介的一个完整的向量放射的转移模型(SOSVRT)被开发了。克服集中的计算负担,由截断与一个几何系列散布订单的一种简单近似技术被用来减少计算时间。有三种对称关系和二个相互的反的操作员的阶段矩阵的分析Fourier分解被实现了进一步改进计算效率。改进精确性,一个processing以后过程被实现精确地插入内推在任意的角度的Stokes向量。有为随机面向的过寺院生活的球状体的气氛的基准的比较证明为各个的优秀同意司烧参数(在0.1%以内)。SOSVRT被测试了放射的转移建模因为对RT3的不同大气的状况,它基于双增加的方法,和结果证明SOSVRT在向量精确、更有效,特别为光薄空气,它是在极化的放射的转移模拟的最普通的盒子。SOSVRT在Fortran90被写,代码由联系作者是自由地可存取的。关键词放射的转移-极化-散布的连续顺序-散布
简介:Kaolinite(anddickite)isdioctahedral1:1layersilicate.Owingtotheinfluenceofdifferentgeologicalconditionsonthemineralduringandafteritsformation,naturalkaolinite,ingeneral,possessesdifferentdegreesofinternalstructuralorder.PlanconandTchoubar(1977a,1977b),Tchoubaretal.(1982)establishedthattheprinci-paltypeofdisorderinnaturalkaoliniteisthedisplacementofthevacantoctahedral
简介:改进集中的能力预先叠时间移植允许想象的节反映结构的特征,深度,和接口形状,它是为起始的深度迁居速度模型的准备的关键步。传统的对称的旅行时间方程基于一个分层的模型的假设被导出。完成与强壮的侧面的变化集中在媒介的需要的效果是困难的。非对称的旅行时间方程基于谎言代数学和一个伪differential操作符包含能甚至在强烈侧面的可变媒介并且也改进集中的能力的侧面的速度衍生物为相对振幅保藏的重量系数的计算精确。与对称的方法相比,非对称的方法是更有效的。在这篇论文,我们描述几关键步非对称预先叠旅行时间计算和现在的一些测试用合成、真实的数据结果。