简介:柏油的具体核心(ACC)水坝广泛地在中国被造。许多ACC水坝执行井,而是其它在此处学习的西方的中国包括盒子经历了重要的漏。浸透不饱和的水流动的一个数字模特儿被适应通过水坝模仿渗出物。由在不同条件下面比较正常、反常的渗出物地,为实际反常渗出物地的主要原因被识别并且在转变地区(TZ)和下游的水坝壳在ACC和非计划中的、低渗透层(LPL)归因于一个缺点。这些结论与水坝的状况和表演一致。不适当的ACC构造过程可能在ACC引起了缺点。ACC厚度的一个突然的变化可能导致了压力集中并且引起了ACC失败。为TZ和水坝壳的材料来源从说明,和土壤阶段复杂、变化因为TZ不充分地被控制。特别地,测试证明渗透在水坝的这二部分在大范围上变化。意外LPL可能在两个区域存在,并且连续地延长。
简介:SeismicPvelocitystructureisdeterminedfortheupper500kmoftheinnercoreandlowermost200kmoftheoutercorefromdifferentialtraveltimesandamplituderatios.ResultsconfirmtheexistenceofagloballyuniformFregionofreducedPvelocitygradientinthelowermostoutercore,consistentwithironenrichmentneartheboundaryofasolidifyinginnercore.Pvelocityoftheinnercorebetweenthelongitudes45oEand180oE(quasi-EasternHemisphere)isgreaterthanorequaltothatofanAK135-Freferencemodelwhereasthatbetween180oWand45oE(quasi-WesternHemisphere)islessthanthatofthereferencemodel.Observationofthisheterogeneitytoadepthof550kmbelowtheinnercoreandtheexistenceoftransitionsratherthansharpboundariesbetweenquasi-hemispheresfavoreithernoorveryslowinnercoresuperrotationoroscillationswithrespecttothemantle.DegreeoneseismicheterogeneitymaybebestexplainedbyactiveinnercorefreezingbeneaththeequatorialIndianOceandominatingstructureinthequasi-EasternHemisphereandinnercoremeltingbeneathequatorialPacificdominatingstructureinthequasi-WesternHemisphere.Variationsinwaveformsalsosuggesttheexistenceofsmaller-scale(1to100km)heterogeneity.
简介:Inthelastseveralyearssince2004animportantnewfindinghasbeenunveiledbycombinedeffortsduetoJapanese(SatoruTanaka),French(RenaudDeguen,TAlbousierreandMarcMonnereau),AmericanandChinesegeophysicists(XiaodongSongandVernonFCormier)whoemployedfromunambiguousdetailedseismologicalevidenceandexplainedbycleartheoreticalandsoundlaboratoryargumentsdrawnfromfluiddynamicsthatthereexistsastrong
简介:Studyonformcharacteristicsofnitrogeninmarinesedimentsistheprimarymethodtoresearchitsbiogeochemicalcyclingandnitrogenformcharacteristicsincoresedimentscanreflecttheprocessandresultsofearlydiagenesisinacertaindegree.Inthispaper,SequentialextractionprocessinnaturalgrainsizewasusedforstudyingtheexistentformsofnitrogeninfivecoresedimentsofthesouthernBohaiSeaforthefirsttime.Nitrogenwasdividedintotwoparts-transferableandfixedbasedonwhetheritcouldbeextractedbythereagent.DistributionsandearlydiagenesisoftransferablenitrogenformsinthesouthernBohaiSeawereresearchedintegratedly.ResultsindicatethatIEF-NandOSFNarepredominantformsintransferablepartinthestudiedcoresediments.Contentsofdifferentnitrogenformsvarydifferentlywithdepth,andhavedifferentdiagenesisprocess.Decompositionconstantoforganicnitrogen(ON)andOCareabout15.51×10-3a-1and4.79×10-3a-1respectively,andthedecompositioncontentofbiogenicelementsC,N,P,SihasthesequenceN>P>C>Si.OC/TN(simplifiedasC/Ninthefollowing)ratioismuchlowerthanOC/ON,whichindicatesthatsedimentpreservesplentyofinorganicnitrogen(IN)and/orfixednitrogen,andthedecreaseofOC/ONratiowithdepthisduetoONreservationinsediments.Generally,transferablenitrogenaccountsformoreproportionofTNinthesurfacelayerthaninthedeeplayerofcoresediments,whereas,somestableformsofnitrogencanactivateandbecometransferableunderappropriateenvironment,whichinducestheproportionoftransferablenitrogeninTNinthedeeplayertobealmostthesameasthatinthesurfacelayer.
简介:OnthebasisofthesoundvelocitymeasurementsofthecoralreefcorefromNanyongNo.1wellofYongshuReefintheNanshaIslands,thepaperstudiestherelationsbetweentheverticalsoundvelocitytransitionfeaturesinthecoralreefcoreandthecorrespondingstratigraphicdepositionalfacieschangeaswellasstratigraphicgapoferosion,analysesthecauseofthesoundvelocitytransition,expoundstheconcreteprocessofthesealevelchangeresultinginthestratigraphicgapoferosionandfacieschangeinthecoralreefandexplainstherelationsbetweentheverticalsoundvelocitytransitioninthecoralreefcoreandthecorrespondingstratigraphicpaleoclimateandthesealevelchange.ThisstudyisofimportantpracticalvalueandtheoreticalsignificancetotheislandandreefengineeringconstructionandtheacousticloggingforoilexplorationinthereeflimestoneareaaswellasthepaleoceanographicstudyofthemarginalseainthewestermPacificOcean.
简介:由重力的分离的核心形成据说释放了足够的内部热融化地球。energetics的分析,比较重力的势能,U<潜水艇class=“a-plus-plus”>到地球当前的分层的配置的一个虚构、同类的参考状态的g),需要更新改正错误和省略,并且提供最近的调查结果:(1)一个错误的正号被用于Ug当在无穷维持0的参考价值时,它为U导致一个不正确的符号在决定一个过程是否吸热或发热关键的g,。(2)U的价值<潜水艇class=“a-plus-plus”>为地球起始的状态的g是不明确的。(3)最近的陨星证据显示在地球是完整大小的以前,那核心形成开始了,它严重地限制U<潜水艇class=“a-plus-plus”>g。(4)不同类的生长另外减少了U<潜水艇class=“a-plus-plus”>g。(5)在核心和披风之间的微分旋转的潜在地大的效果没被说明为。(6)与创造顺序联系的熵变化被忽视。因此,我们修订U的价值<潜水艇class=“a-plus-plus”>g,评估无常,并且显示出那U<潜水艇class=“a-plus-plus”>g实质地被变换成configurational能量(TS)。这些考虑限制初发的热的大来源到影响和放射性。尽管这些过程可以在核心形成起一个作用,他们的精力独立于重力的分离,它生产顺序和旋转能量,不是内部热。相反,因为它分离,重力的分离支持主要的行星的冷却lithophilic放射性的元素当弄短时,增加向上的、表面热流动放射产生的热向外在上扩散的距离。
简介:我们进行一个实验调查在在PKP光线路径在中美洲下面取样的内部核心的体积的观察速度坡度的线性是否是柔韧的近似。而不是解决一个优化问题,我们在贝叶斯的推理以内走近它。在模型说明被放松以便的地方,这是一条整体途径而不是仅仅一个答案,一些讲理的模型是可接受的。在贝叶斯的推理这里使用了的transdimensional,而且,基础功能的数字需要为观察建模由自己一未知。我们建模在模型的整体揭示那,很可能是包含仅仅2个节点(线性趋势)的那些。因此,我们的结果认为关于观察坡度在它的性质是不变的披风的其余部分为内部核心旋转的决心使用的假设正当(线性)。在地震学的最近的观察建议在有弹性的参数的空间可变性是在内部核心的普遍现象,是可能的。未来数组观察将进一步抑制速度变化的空间程度和大小并且显示出是否在内部核心的二伪半球的这些观察之间有重要差别。
简介:ThereisabeltofmetamorphiccorecomplexesinthewesternmarginoftheYangtzecraton.ThegeologicalsettingofthebeltissimilartothatoftheCordilleranmetamorphiccorecomplexes.AtypicaloneinthisbeltistheJianglangmetamorphiccorecomplex,whichhasaconfigurationconsistingofthreelayers:acorecomplexconsistingofMesoproterozoicschistsequence,aductilemiddleslabconsistingofPaleozoicmeta-sedimentary-basaltcharacterizedbythedevelopmentof"foldinglayer"andanuppercoverconsistingofXikangGroupwhichhassufferedbothbucklingandflattening.AdetachmentfaultdevelopedalongthecontactboundarybetweenthecoverandbasementcausestheomissionofUpperSinianandCambrianatthebaseofcover.Alotofnormalductileshearzonesdevelopedinthecovercausesthethinningofit.Allthefeaturesshowthattheearlyextensionresultsinthethinningofcrust,buttheformationofthedomeandexposureofbasementrocksmaybetheresultsofsuperimp
简介:A3D非静水力学的模型葡萄(全球/地区性的吸收和预言系统)的动态核心在Yin-Yang格子上被开发处理极的问题并且提高计算效率。强迫的三维的Coriolis被介绍给新核心,并且强迫的Coriolis的完整的表示使分享在殷和杨子域之间的代码直接。类似于在葡萄建模的原版,一个半含蓄的semi-Lagrangian计划与跨边界的运输的另外的安排为时间的集成和移流被采用。在时间的非集中的秒顺序和空间discretization下面,干燥nonhydrostatic框架作为一个椭圆的问题的答案被总结。产生Helmholtz方程被解决与概括与经典Schwarz方法在合作结合剩余解答者。尽管方程的系数与在原来的模型的那些相当不同,新核心的计算过程只是一样。双性人立方的Lagrangian插值服务向Dirichlet类型边界条件提供在子域之间的数据转移。干燥核心与几个基准测试用例被评估,并且所有测试显示合理数字稳定性和计算性能。平衡流动的坚持和导致山脉的Rossby波浪和Rossby-Haurwitz波浪的开发在半含蓄的semi-Lagrangian证实3DCoriolis条款的适当安装Yin-Yang格子上的动态核心。
简介:克莱在在抵抗力索引之间的关系上有重要影响我和水浸透Sw(即,I-Sw关系)水库岩石因为它复杂化这些岩石的当前的路径。因为在岩石内的泥土的毛孔结构,微分发和内容不能在实验期间被观察并且控制,由物理实验室大小在各种各样的岩石的传导性上揭示这些泥土效果的物理机制是困难的。我们在场在水库的电的运输性质上学习这些泥土效果的一条数字岩石途径用格子气体在毛孔规模摇自动化(LGA)方法。数字岩石样品从水库岩石的SEM图象与谷物尺寸分发的信息被构造。LGA然后充分在这些数字岩石上被使用与液体浸透了为在I-Sw关系的非高射炮行为上揭示体积的效果和泥土的分发模式模仿电的运输性质。在模仿的结果和实验室大小之间的好协议清楚地在岩石物理的数字研究表明LGA的有效性。把研究基于这些,一个新模型为描述在浸透代表和泥土的体积之间的关系的份量上被开发了(V嘘)。这开发可以在水库岩石中为液体浸透改进评估。
简介:到一架飞机上的起始的内部核心的结构的TC增强和轨道的敏感用一个数字模型被调查。结果证明有大内部核心的风(CVEX终止)的旋涡与小内部核心的风(CCAVE终止)比那经历更早的增强,但是他们将近在旋转起来以后有一样的增强率。在早阶段,与表面热流动联系的对流房间主要在CVEX终止在内部核心的区域以内被限制,而在CCAVE终止的旋涡与大多数由于效果在外部核心的区域被开始到东北的对流旋涡展出更加不对称的结构。在CVEX终止的大内部核心的惯性的稳定性能从到动能的对流加热在变换推动高效率。另外,在在主要eyewall外面的内部核心的区域的许多更强壮的拉紧变丑和PBL不平衡比在CCAVE终止,它在CVEX-EXP.对快速的axisymmetrization和早增强导致在CVEX终止的TC轨道在整个集成支撑向西北的排水量的在CVEX终止在起始的发展阶段期间续起,而当不对称的结构是主导的时,在CCAVE终止的TC经历向东北的反弯。由于到在CCAVE终止的TC中心的东北的提高的不对称的传送对流,一双第二等的旋回在大规模主要旋回形式以内嵌入,它调制通风流动并且因此驾驶TC移动向东北。
简介:Inthispaper,wetakeDLW3101coreobtainedatthetopofthecanyon(nolandslidearea)andDLW3102coreobtainedatthebottomofthecanyon(landslidearea)onthenortherncontinentalslopeoftheSouthChinaSeaasresearchobjects.ThechronostratigraphicframeworkoftheDLW3101coreandelementalstrataoftheDLW3101coreandtheDLW3102coresinceMIS5areestablishedbyanalyzingoxygenisotope,calciumcarbonatecontent,andX-RayFluorescence(XRF)scanningelements.Onthebasisoftheinformationobtainedbyanalyzingthesedimentarystructureandchemicalelementsinthelandslidedeposition,wefoundthattheDLW3102coreshowsfourlayersofsubmarinelandslides,andeachlandslidelayerischaracterizedbyhighSi,K,Ti,andFecontents,therebyindicatingterrigenousclasticsources.L1(2.15–2.44m)occurredinMIS2,whichisaslumpsedimentarylayerwithasmallslidingdistanceandscale.L2(15.48–16.00m)occurredinMIS5andisadebrisflow-depositedlayerwithascaleandslidingdistancethataregreaterthanthoseofL1.L3(19.00–20.90m)occurredinMIS5;itsupperpart(19.00–20.00m)isadebrisflow-depositedlayer,anditslowerpart(20.00–20.90m)isaslidingdepositionlayer.ThelandslidescaleofL3islarge.L4(22.93–24.27m)occurredinMIS5;itsupperpart(22.93–23.50m)isaturbidsedimentarylayer,anditslowerpart(23.50–24.27m)isaslumpsedimentarylayer.ThelandslidescaleofL4islarge.
简介:Theeast-westlocationchangeoftheEastAsianwesterlyjet(EAWJ)at200hPaduringMeiyuandtheassociatedspatialdistributionvariationofprecipitationinthemiddle-lowerreachesoftheYangtzeRiver(MLYR)areinvestigatedbyusingthe40-yrNCEP/NCAR(NationalCentersforEnvironmentalPrediction/NationalCenterforAtmosphericResearch)pentadmeanreanalysisdataanddailyprecipitationobservationdatafrom1958to1997.Theresultsshowthattherearetwoareasoverwhichthe200-hPaEAWJcenterappearsmostfrequentlyduringtheMeiyuperiod:oneisthewesternPacific(WP)andtheotheristheEastAsiancontinent(EAC).DuringtheMeiyuperiod,thewesterlyjetovertheEACisweak,andthecoreofthewesterlyjetovertheWPsplitsupwithreducedintensityanddisappearsbytheendofMeiyu.ThechangesinthelocationandintensityofthewesterlyjetareassociatednotonlywiththestartingandendingdatesofMeiyu,butalsowiththespatialdistributionandintensityofprecipitationintheMLYR.ItisfoundthatwhenthewesterlyjetcoreintheuppertroposphereislocatedovertheWPandiscoupledwithan850-hPasouthwesterlyjet,heavyprecipitationaccompaniedbystrongconvergenceandplentysupplyofwatervapor,occursinthelowerreachesoftheYangtzeRiver.Ifthe200-hPawesterlyjetcoreislocatedovertheEAC,andwithoutan850-hPasouthwesterlyjet,onlyweakprecipitationoccursintheMLYR.Therefore,thelongitudinallocationoftheEAWJcoreplaysanimportantroleindeterminingtheupper-tolower-levelcirculationstructureandthespatialdistributionofheavyprecipitationintheMLYRduringtheMeiyuperiod.
简介:Themulti-stagegeologicalevolutionandextensivecontinentaldeformationsduringthecourseofitshistorymaketheCentralAsianmetallogenicregion(CAMR)auniqueandcomplicatedlarge-scalemetaldomain.Newgeologicalobservationsandpreciseage-dataallowanimprovedreconstructionofthegeologicalevolutionoftheCAMR.ThispapersummarizesthePaleozoicorogenicevolutionandrelatedoreformationinthecorepartoftheCAMRbasedonthegeologicaldatapublishedbothduringtheSovietperiodandthelastdecades.Fourore-formationprovinces(Altay,BalkhashJunggar,Chu-Yili-Tianshan,andSouthwestTianshan)couldbeclassified.TheBalkhash-JunggarandChu-Yili-Tianshanprovincesarethemajortopicsofthispaper.TheBalkhash-Junggarprovinceconsistsof4hugeore-formingbelts(Zharma-Saur,Tarbahtay-Xiemistay,Aktogay-Baerluke,BalkhashwesternJunggar)with11largeore-collegeareas.TheChu-Yili-Tianshanprovinceconsistsof4hugeore-formingbelts(Alatau-Sairimu,Chu-Yili-Bolehuole,Issyk-Awulale,Kazharman-Nalaty)with22largeore-collegeareas.Formationoflargeore-collegeareacorrespondstoaspecificstageofcontinentalcrustgrowth.ComparisonofgeologyandoredepositsintheCAMRprovidesrichinformationforfutureexplorationandunderstandingofore-formingprocesses.ThePaleo-JunggarOceanclosedatEarlyDevonianintheBalkhash-westernJunggarore-formingbelt.Afterwards,widespreadvolcanic-sedimentaryrocksformedatextensionalstageduetodelaminationofthethicklowercrustformedduringpreviousaccretionaryprocesses.FelsicmagmaintrusioncausedformationofporphyryCu-Audepositat~310Maandrelatedhydrothermalgolddepositsabout10Malater.Forexample,intheHatu-Baobei-SartohayAu-Crore-collegeareaintheBalkhash-westernJunggarore-formingbelt,smallgranitictodioriteplutonsandvariousdykes(312–277Ma)andlargegranitebodies(~300Ma)intrudedintotheDevoniantoEarlyCarboniferousvolcano-sedimentarybasin.Thesemagmaticactivities
简介:在东方半球的PKP(DF)的变细以同时解释一种思索的关系的多重散布被检验,相应于强壮的变细的一个相对快的速度异例。有一个维的随机的速度变化的反射率synthetics与振幅比率和微分旅行为赤道的路径PKP(Cdiff)-PKP(DF)预定的PKP(DF)/PKP(Cdiff)的观察相比。有5%,6%,和7%的标准差在的P波浪速度变化的Gaussian分布最高内部核心的200km在是比在东方半球的典型结构稍微快的速度结构上被附加,根据仅仅一个维的结构被考虑,它是可能的解释旅行时间和振幅数据。在二的scatterer分发特征、三尺寸的统计数值的进一步的考试被要求获得一个现实主义的结论。