简介：ThePearlRiverEstuary（PRE）islocatedattheonshore-offshoretransitionzonebetweenSouthChinaandSouthChinaSeaBasin,anditisofgreatsignificantvalueindiscussingtectonicrelationshipsbetweenSouthChinablockandSouthChinaSeablockandseismicactivitiesalongtheoffshoreactivefaultsinPRE.However,theresearchesongeometriccharacteristicsofoffshorefaultsinthisareaareextremelylacking.ToinvestigatetheoffshorefaultdistributionandtheirgeometricfeaturesinthePREingreaterdetail,weacquiredthirteenseismicreflectionprofilesin2015.Combiningtheanalysisoftheseismicreflectionandfree-airgravityanomalydata,thispaperrevealedthelocation,continuity,andgeometryofthelittoralfaultzoneandotheroffshorefaultsinPRE.ThelittoralfaultzoneiscomposedofthemajorDanganIslandsfaultandseveralparallel,high-angle,normalfaults,whichmainlytrendnortheasttonortheast-to-eastanddiptothesoutheastwithlargedisplacements.Thefaultzoneisdividedintothreedifferentsegmentsbythenorthwest-trendingfaults.Moreover,thebasementdeptharoundDanganIslandsisveryshallow,whileitsuddenlyincreasesalongtheislandswestwardandsouthward.Thesehasresultedintheislandsandneighboringareasbecomingtheplaceswherethestressaccumulateseasily.Theseismogenicpatternofthisareaiscloselyrelatedtothecomprehensiveeffectofintersectingfaultstogetherwiththelowvelocitylayer.

简介：Thedifference-ratiorelationsareintroducedtoseparatetidalconstituentsthatarealiasedduetothesamplingintervalandsamplingspanoftheTOPEX/POSEIDONaltimeter.ItisfoundthatsometidalconstituentssuchasK1andSSA,thoughaliasedatalongtrackpoints,arenotaliasedatcrossoverpointsbecausethedataatcrossoverpointsaredoublethoseatalongtrackpoints.Sotheharmonicanalysismethodcanbeemployeddirectlyfortheanalysisoftimeseriesatcrossoverpoints.Thenthedifference-ratiorelationsfromcrossoverpointsareintroducedtoanalyzethetimeseriesatalongtrackpoints.TheTOPEX/POSEIDONdataintheNorthwestPacificareanalyzedwiththismethod.Theresultsfromthismethodagreewellwithtidalconstantsfromtidalgauges.

简介：Thestabilityofsubmarinegeologicalstructureshasacrucialinfluenceontheconstructionofoffshoreengineeringprojectsandtheexploitationofseabedresources.Marinegeologistsshouldpossessadetailedunderstandingofcommonsubmarinegeologicalhazards.Currentmarineseismicexplorationmethodsarebasedonthemosteffectivedetectiontechnologies.Therefore,currentresearchfocusesonimprovingtheresolutionandprecisionofshallowstratumstructuredetectionmethods.Inthisarticle,thefeasibilityofshallowseismicstructureimagingisassessedbybuildingacomplexmodel,anddifferencesbetweentheseismicinterferometryimagingmethodandthetraditionalimagingmethodarediscussed.Theimagingeffectofthemodelisbetterforshallowlayersthanfordeeplayersbecausecoherentnoiseproducedbythismethodcanresultinanunsatisfactoryimagingeffectfordeeplayers.Theseismicinterferencemethodhascertainadvantagesforgeologicalstructuralimagingofshallowsubmarinestrata,whichindicatescontinuoushorizontalevents,ahighresolution,aclearfault,andanobviousstructureboundary.TheeffectsoftheactualdataappliedtotheShenhuareacanfullyillustratetheadvantagesofthemethod.Thus,thismethodhasthepotentialtoprovidenewinsightsforshallowsubmarinestrataimaginginthearea.

简介：Modalstrainenergybasedmethodsfordamagedetectionhavereceivedmuchattention.However,mostofpublishedarticlesusenumericalmethodsandsomestudiesconductmodaltestswithsimple1Dor2Dstructurestoverifythedamagedetectionalgorithms.Onlyafewstudiesutilizemodaltestingdatafrom3Dframestructures.Fewstudiesconductperformancecomparisonsbetweentwodifferentmodalstrainenergybasedmethods.Theobjectiveofthispaperistoinvestigateandcomparetheeffectivenessofatraditionalmodalstrainenergymethod(Stubbsindex)andarecentlydevelopedmodalstrainenergydecomposition(MSED)methodfordamagelocalization,forsuchapurposebothsimulatedandmeasureddatafromanoffshoreplatformmodelbeingused.Particularly,themodeshapesusedinthedamagelocalizationareidentifiedandsynthesizedfromonlytwomeasurementsofonedamagescenariobecauseofthelimitednumberofsensors.Thetwomethodswerefirstbrieflyreviewed.Next,usinga3Doffshoreplatformmodel,thedamagedetectionalgorithmswereimplementedwithdifferentlevelsofdamageseveritiesforbothsingledamageandmultipledamagecases.Finally,aphysicalmodelofanoffshoresteelplatformwasconstructedformodaltestingandforvalidatingtheapplicability.ResultsindicatethattheMSEDmethodoutperformstheStubbsindexmethodforstructuraldamagedetection.

简介：二层的污染物质移流散开建模的A被造在Maidao附近在海区域调查污染物质运输离开Qingdao海岸。一种伴随数据吸收技术被使用估计模型参数的最佳的价值。污染物质的起始的地上的试验性的结果显示化学需氧量(货到付款)集中的分发对水平旋涡扩散性敏感。水平旋涡扩散性的适当价值是必要的以便精确描绘起始的领域的影响，；它对污染物质的移流散开过程的模拟也必要。由模型参数的倒置；起始的货到付款集中的优化，模拟结果显著地被改进。费用函数被归结为它的第一步值中的40%个。在模型产量之间的平均不合身的衣服；在从0.46～0.25mgL的上面的层减少的观察[1]，；那从0.22～0.14mgL在底层减少[1]。

简介：尽管尼内蒂埃斯特·理兹附近的Indo澳大利亚的板为理解新板边界的形成是重要的，它的构造问题是复杂的，他们中的大多数糟糕被知道。这份报纸基于深测术，严肃和magnetics的数据做了详细构造分析。深测术和严肃地图显示出许多褶层的词法特征，它由于在印第安人和亚洲盘子之间的碰撞与Indo澳大利亚的板的intraplate变丑有关。严肃异例显示出破裂地区的结构，它被传播的seafloor和指责的变换引起。褶层和破裂地区的特征与弥漫的板边界和重新定义的板部件将发生在Indo澳大利亚的板以内的假设一致。另外，编了磁性的数据表明磁性的线条，放弃的传播中心，向南方的山脉跳，板打手势。这些特征为重建学习区域的构造进化历史提供有用信息。磁性的异例建议变换差错的一条另外的板边界打字发展中。

简介：Environmentalloadistheprimaryfactorinthedesignofoffshoreengineeringstructuresandoceancurrentistheprincipalenvironmentalloadthatcausesunderwaterstructuralfailure.Incomputationalanalysis,thecalculationofcurrentloadismainlybasedonthecurrentprofile.Thecurrentprofilemodel,whichisbasedonastructuralfailurecriterion,isconducivetodecreasingtheuncertaintyofthecurrentload.Inthisstudy,weusedprototypemonitoringdataandtheempiricalorthogonalfunction(EOF)methodtoinvestigatethecurrentprofileintheSouthChinaSeaanditscorrelationwiththedesignofunderwaterstructuralstrengthandthedynamicdesignoffatigue.Theunderwaterstructuralstrengthdesigntakesintoaccountthesizeofthestructureandtheservicewaterdepth.Weproposeprofilesfortheoverallandlocaldesignsusingtheinversefirst-orderreliabilitymethod(IFORM).Weextractedthecharacteristicprofilecurrent(CPC)ofthemonitoredseaareatosolvedynamicdesignproblemssuchasvortex-inducedvibration(VIV).WeusedrandomsamplingtoverifythefeasibilityofusingtheEOFmethodtocalculatetheCPCfromthecurrentdataandidentifiedthemainproblemsassociatedwithusingtheCPC,whichdeservecloseattentioninVIVdesign.Ourresearchconclusionsprovidedirectreferencesfordeterminingcurrentloadinthisseaarea.Thisanalysismethodcanalsobeusedintheanalysisofotherseaareasorfieldvariables.

简介：Newsatellite-derivedlatentandsensibleheatfluxesareperformedbyusingWindSatwindspeed,WindSatseasurfacetemperature,theEuropeanCentreforMedium-rangeWeatherForecasting(ECMWF)airhumidity,andECMWFairtemperaturefrom2004to2014.The55mooredbuoysareusedtovalidatethembyusingthe30minand25kmcollocationwindow.Furthermore,theobjectivelyanalyzedair-seaheatfluxes(OAFlux)productsandtheNationalCentersforEnvironmentalPrediction-NationalCenterforAtmosphericResearchreanalysis2(NCEP2)productsarealsousedforglobalcomparisons.ThemeanbiasesofsensibleandlatentheatfluxesbetweenWindSatfluxresultsandbuoyfluxdataare–0.39and–8.09W/m~2,respectively.Inaddition,therootmean-square(RMS)errorsofthesensibleandlatentheatfluxesbetweenthemare5.53and24.69W/m~2,respectively.TheRMSerrorsofsensibleandlatentheatfluxesareobservedtograduallyincreasewithanincreasingbuoywindspeed.Thedifferenceshowsdifferentcharacteristicswithanincreasingseasurfacetemperature,airhumidity,andairtemperature.ThezonalaveragelatentfluxeshavesomehighregionswhicharemainlylocatedinthetradewindzoneswherestrongwindscarrydryairinJanuary,andthemaximumvaluecentersarefoundintheeasternwatersofJapanandontheUSeastcoast.Overall,theseasonalvariabilityispronouncedintheIndianOcean,thePacificOcean,andtheAtlanticOcean.Thethreesensibleandlatentheatfluxeshavesimilarlatitudinaldependencies;however,somedifferencesarefoundinsomelocalregions.

简介：在里面从科学巡航的situ海表面咸度(SSS)大小到盖住30的东南印度洋的西方的地区??ǜ

简介：ThestudyprovidesoneofthefirstlinesofevidenceshowinglinkagesbetweenAntarcticphytoplanktonabundanceandcompositioninresponsetoENSO,basedonhistoricalreconstructionofsedimentbiomarkers.Inadditiontosedimentbiomarkers,fieldmeasuredandremotesensingdataofphytoplanktonabundancewerealsorecordedfromPrydzBay,EasternAntarctica.CommunitystructureoffieldmeasuredphytoplanktonshowedsignificantElNino/LaNina-relatedsuccessionduring1990to2002.Ingeneral,thenumberofalgaespeciesdecreasedduringElNinoandLaNinayearscomparedtonormalyears.Australsummermonthlyvariationofremotelysensedchlorophyll-a(Chl-a),particulateorganiccarbon(POC),andseasurfacetemperature(SST)indicatedthatENSOimpactedthetimingofphytoplanktonbloomsduring2007to2011.Phytoplanktonblooms(indicatedbyChl-aandPOC)precededtheincreasesinSSTduringElNinoyears,andlaggedbehindtheSSTincreasesduringLaNinayears.Stratigraphicrecordofmarinesedimentarylipid(brassicasterol,dinosterolandalkenones)biomarkersinferredthattheproportionsofdifferentalgae(diatoms,dinoflagellatesandhaptophytes)changedsignificantlybetweenElNinoandLaNinaevents.Therelativeproportionofdiatomsincreased,withthatofdinoflagellatesbeingdecreasedduringElNinoyears,whileitwasreversedduringLaNinayears.