简介：追踪作为多尺度知道的算法追踪雷达的新雷达回响回应由跨关联(MTREC)在这研究被开发在不同空间规模分析雷达回响的运动。雷达回响的运动，特别地与对流暴风雪联系了，在导致对流暴风雪的形成的气象学的系统之中由于复杂相互作用在各种各样的空间规模展出不同特征。为空回响区域，平常的关联技术生产零或运动向量的很小的大小。减轻这些限制，MTREC由关联(TREC)使用追踪的雷达回响有一个大盒子的技术驾驶风驾驶的系统的运动，和MTREC与一个小盒子使用TREC技术决定估计小规模的内部运动向量。最后，MTREC向量被综合获得系统的运动和小规模的内部运动。MTREC技术的性能与用案例研究的TREC技术相比：Wenzhou雷达和一个嚎啕线系统在2005年9月11日在2011年6月23日观察的Khanun台风由北京雷达检测了。结果证明那更空间地变光滑，连续向量领域能被MTREC技术产生，它在追踪全部雷达反射率模式导致改进。新多尺度的追踪计划被使用在量的降水nowcasting的表演上学习它的影响。在一1-h铅时间的重降水的地点和紧张与使用雷达和雨计量器的量的降水估计更一致。

简介：Therearemanyfactorsaffectingtheinstabilityofthesubmarinehydrate-bearingslope(SHBS),andtheinteractionwithhydrateisverycomplicated.Inthispaper,themechanicalmechanismofthestaticliquefactionandinstabilityofsubmarineslopecausedbythedissociationofnaturalgashydrate(NGH)resultingintherapidincreaseofporepressureofgashydrate-bearingsediments(GHBS)andthedecreaseofeffectivestressareanalyzedbasedonthetimeseriesandtypeofSHBS.Then,takingthetypicalsubmarineslopeinthenorthernSouthChinaSeaasanexample,fourimportantfactorsaffectingthestabilityofSHBSareselected,suchasthedegreeofhydratedissociation,thedepthofhydrateburial,thethicknessofhydrate,andthedepthofseawater.Accordingtotheprincipleoforthogonalmethod,25orthogonaltestschemeswith4factorsand5levelsaredesignedandthesafetyfactorsofsubmarineslopestabilityofeachschemearecalculatedbyusingthestrengthreductionfiniteelementmethod.Bymeansoftheorthogonaldesignrangeanalysisandthevarianceanalysis,sensitivityofinfluentialfactorsonstabilityofSHBSareobtained.Theresultsshowthatthedegreeofhydratedissociationisthemostsensitive,followedbyhydrateburialdepth,thethicknessofhydrateandthedepthofseawater.Finally,theconceptofgashydratecriticalburialdepthisputforwardaccordingtotheinfluencelawofgashydrateburialdepth,andthenumericalsimulationforspecificsubmarineslopeiscarriedout,whichindicatestheexistenceofcriticalburialdepth.

简介：在维持在供应之间的平衡的耕地工具的供应和需求和在有时间的推移的某个区域以内的耕地的需求之间的动态平衡。维持在耕地的供应和需求之间的动态平衡是为耕地的持续使用和农业的持续发展的前提和基础，是众所周知的。并且它是与整个社会和国民经济的持续发展有关的一个全面、战略的问题。现在，面对象人口的快速的生长的如此的一种严重状况，蓬勃发展工业和城市的扩大，激进的土壤恶化和污染和数量的连续减少和在世界上的耕地的质量，中国不得不依靠它的自己的陆地作为一个号码1最大的人口得到食物的自足。

简介：地震照明在表面下的成像起一个重要作用。一幅更好的图象也能通过优化获得几何学或介绍包含照明赔偿的更先进的地震移植或tomographic倒置方法被期望。垂直电报调查是为它的灵活性和数据质量的传统的海洋的地震调查的潜在的代替。处理的常规垂直电缆线数据在移植前要求primaries和multiples的分离。我们建议使用多尺度的完整的波形倒置(FWI)改进垂直电报调查的照明范围。一个深水速度模型被造在在海床下面检测低速度异例测试多尺度的FWI的能力。合成结果证明多尺度的FWI是在深海的探索的一个有效模型大楼工具。通过面向的照明分析和多尺度的FWI可以帮助减轻垂直电报调查的风险的目标的几何学优化。多尺度的FWI，低频率的数据和multi-vertical-cable获得系统的联合可以提供高分辨率和高保真度表面下的模型。

简介：Ingeneral,theseismicresponseanalysisinearthquakeengineeringassumesthatthevibrationparametersofthetargetandthecontactsurfaceoftheexternalmediaareidentical,i.e.,singlepointinput.However,earthquakeenergyhasanattenuationphenomenoninwavepropagation,soawiderangeofsoilslopesandtheexternalmediumcontactsurfaceofdifferentinputpointsonmotionarenotidentical.Ifweconsidersinglepointinputonly,itmaynotcorrespondwithreality,soitisnecessarytocarryoutresearchonmulti-pointinputmethods.Basedonthe2-Dslopemodel,single-pointinputandmulti-pointinputareperformedrespectivelytoanalyzeandcomparetheirsimilaritiesanddifferencesintheperspectivesofthecharacteristicsofseismicresponseofsoillayerandplasticzonedistributiontoprovideareferencefortheseismicdesignofslopes.Theresultsshowthatintheperspectiveofsoilseismicresponseanalysis,thepeakaccelerationoutputandpeakvelocityoutputundermulti-pointinputaregreaterthanthepeakvaluesundersinglepointinputatthesamemonitoringpoint,thepeakappearingtimeisalsoearlierthanthatofthesinglepointinput;intermsoftheplasticzonedistribution,themulti-pointeffectismanifestedasthepresenceofmoreobvioustensileshearfailures;intheperspectiveofsafetycoefficient,thesafetycoefficientundereachmulti-pointinputissmallerthanthatofsinglepointinput,adifferenceofabout7%orso.Insummary,multi-pointinputismorereasonableandpracticalthansinglepointinput,somulti-pointinputshouldbeconsideredinseismicdesign.

简介：TheuniquegeographicallocationandhighaltitudeoftheTibetanPlateaucangreatlyinfluenceregionalweatherandclimate.Inparticular,theAsiansummermonsoon(ASM)anticyclonecirculationsystemovertheTibetanPlateauisrecognizedtobeasignificanttransportpathwayforwatervaporandpollutantstoenterthestratosphere.Toimproveunderstandingofthesephysicalprocesses,amulti-locationjointatmosphericexperimentwasperformedovertheTibetanPlateaufromlateJulytoAugustin2018,fundedbythefiveyear(2018–2022)STEAM(stratosphereandtroposphereexchangeexperimentduringASM)project,duringwhichmultipleplatforms/instruments—includinglong-durationstratosphericballoons,dropsondes,unmannedaerialvehicles,specialsoundingsystems,andground-basedandsatellite-borneinstruments—willbedeployed.Thesecomplementarymethodsofdataacquisitionareexpectedtoprovidecomprehensiveatmosphericparameters(aerosol,ozone,watervapor,CO2,CH4,CO,temperature,pressure,turbulence,radiation,lightningandwind);therichnessofthisapproachisexpectedtoadvanceourcomprehensionofkeymechanismsassociatedwiththermal,dynamical,radiative,andchemicaltransportsovertheTibetanPlateauduringASMactivity.

简介：AfterRodiniasupercontinentwasdisintegratedinLateProterozoic,anocean,namely,TethysOcean,occurredbetweenGondwanacontinentalgroupandPan-CathaysiancontinentalgroupfromLateProterozoictoMesozoic.FromEarlyPaleozoictoMesozoic,TethysOceanwassubductedtowardPan-Cathaysianblockgroup,whichresultsinbackarcexpansion,arc-landcollisionandforearcaccretion.Whenthebackarcbasinexpandsandreachesthesmalloceanicbasin,ophiolitemelangewillbegenerated.Asaccretionhadalreadyoccurredinthesouthofthecontinentalmarginintheearlierstage,thesucceedingbackarcexpansionandthefrontalarcpositionweremigratedtowardsouthcorrespondingly.Therefore,multipleophiolitebeltsandmagmaticrockbeltsoccurred,andshowatrendofdecreasingagefromnorthtowardsouth.Asthecontinentalmarginwassplitandmigratedtowardsouthandreachedahighlatitudeposition,i.e.,withtheshorteningandsubductionofoceaniccrust,thesedimentarybodiesathighlatitudewasaccretedcontinuouslytowardlowlatitudeareatogetherwiththeformationofoceanicisland,mixingofcold-typeandwarm-typeorganismwasgenerated.Moreover,blockssplitandseparatedfromPan-CathaysianorGondwanacontinentalgroupcannottraversetheoceanicmedianridgeandjoinswithanothercontinentalblock.Asaresult,theKunlunbeltontheSWmarginofthePan-Cathaysianlandwasresultedfromthemulti-arcorogenesissuchasthebackarcseabedexpansion,arc-arccollision,arc-landcollisionoceanicbed,andthecontinuoussouthwardaccretionprocess.

简介：Asanimportantdesignfactorforconstructedwetlands,hydraulicretentiontimeanditsdistributionwillaffectthetreatmentperformance.Instantaneouslyinjectedsodiumchloridetracerswereusedtoobtainresidencetimedistributionsofthelabscalesubsurfaceflowconstructedwetland.Consideringthepresenceoftrailingandmultiplepeaksofthetracerbreakthroughcurve,themultiflowdispersionmodel(MFDM)wasusedtofittheexperimentaltracerbreakthroughcurves.Accordingtotheresidualsumofsquaresandcomparisonbetweentheexperimentalvaluesandsimulatedvaluesofthetracerconcentration,MFDMcouldfittheresidencetimedistribution(RTD)curvesatisfactorily,theresultsofwhichalsoreflectedthelayeredstructureofwetlandcells,thustogivereferenceforapplicationofMFDMtothesamekindofsubsurfaceflowconstructedwetlands.

简介：Mesoscaleensembleisanencouragingtechnologyforimprovingtheaccuracyofheavyrainfallpredictions.Occurrencesofheavyrainfallarecloselyrelatedtoconvectiveinstabilityandtopography.Inmid-latitudes,perturbedinitialfieldsformedium-rangeweatherforecastsareoftenconfiguredtofocusonthebaroclinicinstabilityratherthantheconvectiveinstability.Thus,alternativeapproachestogenerateinitialperturbationsneedtobedevelopedtoaccommodatetheuncertaintyoftheconvectiveinstability.Inthispaper,aninitialconditionperturbationapproachtomesoscaleheavyrainfallensembleprediction,namedasDifferentPhysicsModeMethod(DPMM),ispresentedindetail.BasedonthePSU/NCARmesoscalemodelMM5,anensemblepredictionexperimentonatypicalheavyrainfalleventinSouthChinaiscarriedoutbyusingtheDPMM,andthestructureoftheinitialconditionperturbationisanalyzed.Further,theDPMMensemblepredictioniscomparedwithamulti-physicsensembleprediction,andtheresultsshowthattheinitialperturbationfieldsfromtheDPMMhaveareasonablemesoscaiecirculationstructureandcouldreflectthepredictionuncertaintyinthesensitiveregionsofconvectiveinstability.AnevaluationoftheDPMMinitialconditionperturbationindicatesthattheDPMMmethodproducesbetterensemblemembersthanthemulti-physicsperturbationmethod,andcansignificantlyimprovetheprecipitationforecastthanthecontrolnon-ensemblerun.

简介：Detectingthetimingandamountofdeformationiscriticalforunderstandingthephysicalcausesandeventuallywarningofpossiblelandslidehazards.Monitoringofdeformationofstructuresandgroundsurfacedisplacementsduringlandslidescanbeaccomplishedbyusingdifferenttypesofsystemsandtechniques.Besidesgeotechnicalorphysicaltechniques,remotesensingtechniquescanbeclassifiedassatellitetechniques,photo-grammetrictechniques,geodetictechniques,groundbasedtechniques,andsoon.TostudyandgoverngrowinggeologicaldisastersinChina,especiallyintheThreeGorgesarea,ThreeGorgesResearchCenterforGeo-hazard(TGRG)isestablishinganinfrastructuretoef-fectivelyandcomprehensivelyanalyzethemechanismoflandslidedeformation,focusedontheHuangtupolandslide,usingofvariousad-vancedmonitoringsystemsandtechniques.Inthisarticle,theframeworkandlatestadvancesofintegrationofmultiremotesensingtechniquesintheinfrastructurearepresented.Differentremotesensingtechniques,dataprocessingandintegratingmethods,andthelatestresultsarediscussedindetail.Atlast,reviewsoncurrentworkandsuggestionsforfurtherworkareputforward.

简介：Themodifiedhybridelementmethod(MHEM)isutilizedtopredictandanalyzewaveforcesonarbitrarilyshapedmultiplebodies.Thismethodcanbeappliedtowavesofallwaterdepths,i.e.shallow,intermediate,anddeepwaters,onslowlyvaryingseabed.TheMHEMemploystheICCGmethodtosaveCPUandstorage,thusthecomputationofwaveforcesforlargemulti-bodysystemscanbecarriedoutonmicrocomputers.Numericalresultsofthepresentmethodarecomparedwithexperimentaldataandothersolutions.ItisshownthattheMHEMprovidesmoreaccuratesolutionsofthewaveforcesthanothernumericalmethodsdo.Therefore,themethodologypresentedhereincanbeusedinthedesignofcoastalandoceanstructures.

简介：ThesecondauthorstudiedthenonlinearstabilityofN-layerquasi-geostrophicflowsubjecttoperturbationsofparametersandinitialdata,andestablishedthestabilitycriteriafortheflowinquestion,whichinvolvefindingoutthelowesteigenvalueofanellipticboundaryvalueproblem.Inthispaperwhenthedomainisaperiodiczonalchannel,aformulaofthelowesteigenvalueisestablished,whichisusefulforfurtherstudiesandpracticalapplications.

简介：

简介：TheIndiaplate(scontinuousmotiontothenorth,theconvectiveremovaltothethickeninglithospherecausedbysmall-scalemantleconvectionandtheeffectofdenudationontheupliftedplateauareregardedasmaindrivingforcesthatmakethepatternsofstressfieldofEastAsiacontinentatpresenttime.ThemethodofnumericalsimulationisusedtostudythedeformationandthestressfieldofEastAsiacontinentunderdifferentboundaryconditions,differentdenudationcoefficientsanddifferentrockmechanicsparameterswithinatrapezoidgeologicalframe.Comparingwiththeresultsobtainedbymodernspacegeodetictechnique(suchasGPS)theresultsderivedfromseismologicaldatashowthatthepredicteddatabyourmodelcanfitthemverywell.Thedegreeofthefitnessinthewestisbetterthanthatintheeast.TheseresultsimplythatthemaindrivingforceofthedeformationandthestresspatternsofthewestpartofEastAsiacontinentmaycomefromthecollisionandcompressionbetweentheIndiaandtheEurasiaplates.TheinteractiontothePacificandthePhilippinesplatesintheeastpartneedtobeconsidered.Italsoshowsthattheconvectiveremovaltothethickeninglithospherecausedbysmall-scalemantleconvectionandtheeffectofdenudationcannotbenegligibleintheevolutionofthestresspatterns.

简介：雪深度(SD)是为对全球气候变化和陆地表面过程的研究的一个关键参数。一个方法被开发获得每日的SD图象在一更高4km有从在situ观察和扫描辐射计曙光女神(AMSR-E)的先进微波的被动微波遥感的SD大小和交互Multisensor的雪盖子大小的空间分辨率和更高的精确下雪并且冰印射系统(IMS)。在25km的AMSR-ESD空间分辨率从雪密度和用SD从在situ观察和IMS雪盖子相等然后改正的雪水的AMSR-E产品被检索。改正的AMSR-ESD图象然后被重新取样充当在situ观察到虚拟与结合在situ观察真实在4km插入内推用Cressman的空间分辨率SD方法。最后，为中国的几个区域的每日的SD数据产生证明方法很好与一个更低的数字举起模型(DEM)一起在区域被适合到更高空间的分辨率SD数据的产生然而并非井因此在高高度并且与波动的地面适合到区域，例如西藏的高原。为在北Xinjiang的在2003和2010之间的1月的更长的时间时期SD数据产生的分析也表明了方法的可行性。

简介：

简介：现在的学习的目的是在可得到的观察数据相对当前的一百年的全球温暖趋势识别多十的可变性(MDV)。一百年的全球温暖趋势首先在全球吝啬的表面温度(STgm)被识别数据。MDV基于气候变量的三个集合被识别，包括海表面温度(SST)，到700m的从表面的海洋温度，和NCEP和ERA40分析数据集分别地。所有变量是detrended并且低通行证过滤。通过过滤变量的三独立文件结束分析，所有结果一致地显示出二个主导的模式，与他们类似于和平的十的Oscillation/Inter-decadal和平的摆动(PDO/IPO)和大西洋的各自的时间的可变性多十的摆动(AMO)。象PDO一样摆动的空间结构被象ENSO一样结构和半球的对称的特征描绘。结构在大西洋和和平的盆北方在欧亚大陆和温暖的SST上与异常温暖的空气把半球的不对称的特征与象AMO一样摆动展览联系了108坏，或訌?訌吗？？

简介：实时混合模拟是为受到地震与率依赖者行为装载的结构的系统的表演评估的一种有效、划算的动态测试技术。有多重致动器的一个装载集会被要求在物理标本上强加现实主义的边界条件。然而，如此的一个严峻的系统被期望展出致动器的重要动态联合并且受不了时间落后那与伺服水力的系统，以及控制结构相互作用(CSI)的动力学被联系。减少试验性的错误的一条途径考虑多输入，多产量(MIMO)控制器设计，让步的精确参考追踪和噪音拒绝。在这份报纸，为测试的多轴的即时混合模拟(maRTHS)的一个框架被介绍。方法论为在笛卡儿的坐标命令的多重致动器采用一个即时反馈前馈控制控制器。在致动器空间和笛卡儿的空间之间的运动学的转变为动人的平台的所有six-degrees-offreedom被导出。然后，一种频率域鉴定技术被用来开发系统的一个精确MIMO转移函数。进一步，一个笛卡儿域的基于模型的前馈控制反馈控制器在时间被实现落后赔偿并且增加为给定的模型无常追踪的参考书的坚韧性。框架用1/5th-scale负担和在Urbana-平原在伊利诺大学定位的边界条件盒子(LBCB)被实现。表明建议方法论的功效，受到地震装载的一个单个故事的框架被测试。在框架的列之一作为cantilevered钢列在实验室身体上被代表。为实时执行，数字基础，运动学的转变，和控制器在一个数字信号处理器上被实现。结果看maRTHS框架的优秀性能six-degrees-of-freedom什么时候在在基础之间的接口被控制。

简介：多层的沙岩水库全球性发生并且当前在国际生产。这些水库的3D特征太复杂，不能被一般structural-facies-reservoir建模精确地描出。鉴于特殊地质的特征，例如沙岩和mudstoneinterbeds的垂直建筑学，侧面的稳定的沉积和水库poroperm和液体分发的强壮的异质，我们为多层的沙岩水库的3D描述开发了一个新三阶段、六阶段的过程。过程包括二阶段的结构的建模，二阶段的外形建模和水库性质的二种类型的建模。用这个过程，我们建立了形成的模型结构，沙身体结构和microfacies，水库外形和性质包括孔，渗透和煤气的浸透并且提供了3DSebei多层的沙岩气体地的好规模的、系统的描述，中国。这个新过程，由Sebei煤气的地验证了，能被使用描绘类似的多层的沙岩水库。

简介：Anumericalsimulationandanexperimentalstudyonvortex-inducedmotion(VIM)ofanewtypeofdeepdraftmulti-columnsfloatingdrillingproduction,storageandoffloading(FDPSO)arepresentedinthispaper.Themaindimension,thespecialvariablecross-sectioncolumnandthecabinarrangementoftheoctagonalpontoonareintroducedbasedontheresult.Thenumericalsimulationisadaptedtostudytheeffectsofcurrentincidenceanglesandreducedvelocitiesonthisplatform'sswaymotionresponse.The300mwaterdepthequivalenttruncatedmooringsystemisadoptedforthemodeltests.Themodeltestsarecarriedouttocheckthereliabilityofnumericalsimulation.Theresultsconsistofsurge,swayandyawmotions,aswellasmotiontrajectories.Themaximumswayamplitudesfordifferenttypesofoffshoreplatformisalsostudied.Themainresultsshowthatthepeakfrequenciesofswaymotionunderdifferentcurrentincidenceanglesandreducedvelocitiesvaryaroundthenaturalfrequency.TheanalysisresultofflowfieldindicatesthatthechangeofdistributionofvortexinverticalpresentssignificantinfluencesontheVIMofplatform.ThetrendofswayamplituderatiocurveofthisnewtypeFDPSOdiffersfromtheothertypesofplatform.Under45°currentincidenceangle,theswayamplitudeofthisnewtypeofFDPSOismuchsmallerthanthoseofothertypesofoffshoreplatformat4.4≤Vr≤8.9.Thetypical'8'shapetrajectorydoesnotappearintheplatform'smotiontrajectories.