学科分类
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46 个结果
  • 简介:BasedonAVISO(archiving,validationandinterpretationofsatellitedatainoceanography)datafrom1993to2010,QuikSCAT(QuickScatterometer)datafrom2000to2008,andArgodatafrom2003to2008,theinterannualvariabilityoftheGreatWhirl(GW)andrelatedmechanismsarestudied.ItshowsthattheoriginandterminationtimesoftheGW,aswellasitslocationandintensity,havesignificantinterannualvariability.TheGWappearedearliest(latest)in2004(2008)andvanishedearliest(latest)in2006(2001),withtheshortest(longest)durationin2008(2001).Itscenterwasmostsouthward(northward)in2007(1995),whiletheminimum(maximum)amplitudeandareaoccurredin2003and2002(1997and2007),respectively.TheGWwasweakeranddisappearedearlierwithitslocationtendingtobeinthesouthwestin2003,whilein2005itwasstronger,vanishedlaterandtendedtobeinnortheast.TheabnormalyearswereoftennotthesameamongdifferentcharactersoftheGW,andwerenotallcoincidentwithENSO(ElNi?o-SouthernOscillation)orIOD(IndianOceanDipole)events,indicatingtheverycomplexnatureofGWvariations.MechanisminvestigationsshowsthattheinterannualvariabilityofintraseasonalwindstresscurlinGWregionresultsinthatoftheGW.ThegenerationoftheGWiscoincidentwiththearrivalofRossbywavesattheSomalicoastinspring;theintensityoftheGWisalsoinfluencedbyRossbywaves.TheterminationoftheGWcorrespondswelltothesecondoneofthetoptwopeaksinthebaroclinicenergyconversionrateinGWregion,andtheintensityandthepositionoftheGWarealsocloselyrelatedtothetoptwobaroclinicenergyconversionrates.

  • 标签: 机制 ROSSBY波 能量转换率 ARGO资料 印度洋偶极子 卫星数据
  • 简介:Themultiple-beddedcharacteristicsofthecrustandmultiple-stagenature(geosyncline-platform-diwa)ofthetectoicevolutionarctectonicprcrequisitcsfortheformationandevolutionofthegranitoidsandthcirtungstenmineralizationinJiangxi.ControlledbythemultiPlc-stagetectonicevolution,allthegranitoidsofdiffcrcntgeo1og

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  • 简介:Inthisstudy,weexaminedtheeffectofelevatedtemperatureontheexpressionpatternsofgenes,i.e.,nacrein,irr,n16,n19,andhsp70inthepearloysterPinctadafucata.Theexperimentwascarriedoutat4temperatures,i.e.,20℃(ambient,control),24,28℃,and32℃.TheexpressionlevelsoftargetgenesinP.fucatawereassayedat0,6,24,48,and96hviareal-timepolymerasechainreaction.Resultsshowedthattheexpressionlevelsofnacreinandirrhadnosignificantvariationsamongdifferenttimepointsbelow28℃,butsignificantlyincreasedovertimeat32℃.Theexpressionlevelsofn16andn19didnotchangemarkedlyat20℃.Theformerincreasedsignificantlyat6hand24hwhilethelattersubstantiallydecreasedduring6–96hat24,28and32℃.Amongdifferenttemperatures,thelevelofn16wassignificantlylowerat20℃thanatothertemperaturesduring6–96h,andthelevelofn19significantlyvariedamongdifferenttemperaturesat48hand96h.Theexpressionlevelofhsp70wassignificantlyhigherat32℃thanat20,24and28℃at24h.TheseresultsdemonstratedthatelevatedtemperatureimpactedthephysiologicalprocessesofP.fucataandpotentiallyinfluenceditsadaptabilitytothermalstress.

  • 标签: 合浦珠母贝 基因表达 温度 热休克蛋白70 聚合酶链反应 HSP70
  • 简介:ThereoccurabundantchertsintheMesozoicandCenozoicstratainsouthernTibet.Someofthempossesscharacteristichydrothermalstructuressuchaslayered,laminated,massiveandbrecciastructures.RatiosofAl/(Al+Fe+Mn),Co/Ni,Fe/TiandTiO2-Al2O3demonstratethattheiroriginisrelatedtohydrothermalsedimentation.ThechertformationshavecloserelationshipwithSb,Auandpoly-metallicmineralization,andtheore-formingfluidshowstrongcorrelationwithfossilhydrothermalwater.

  • 标签: 沉积结构 热液沉降 矿化作用 西藏 地质条件
  • 简介:Accordingtotheresultsofsiteseismichazardanalysisaccomplishedinthepastdecades,96site-relateddesignspectraareselectedassamplesinthisstudy.Theresultshowsthatthevalueofthecornerperiod(Tg)ofthedesignspectruminGBJ11-89(ChinaSeismicBuildingCode,issuedin1989)islowerthanthevalueobtainedbysiteseismichazardanalysis.ThesamesituationexistswhenwecomparethedesignspectraoftheCodestothespectraaccordingtotheearthquakerecords.Thevalueincurrentseismicdesigncode,GBJ50011-2001issuedin2001,isgreaterthanthatinGBJ11-89,butstilllessthanthevalueobtainedbysiteseismichazardanalysis.Ifweacceptthevaluegotbysiteseismichazardanalysis,wehaveasuspicionthat2/3ofbuildingsbuiltaccordingtoGBJ11-89willnotbesafewhenanearthquakewith2%probabilityofexceedancein50yearsoccurs.

  • 标签: 生境关联 设计频谱 角周期 地震编码 波动效应
  • 简介:Thesediment-hosteddisseminatedgolddepositsintheOinlingregionareofsedimentation-slight-metamorphicoriginsuperimposedbyhydrothermalreworkingatmoderate-lowtemperaturesandarewellcomparablewiththetypicalCarlingolddepositsintheUnitedStates.Inviewoftheconfusingconceptconcerningthe“sediment-hosted”and“Carlin-type”golddeposits,theauthorsproposethattheterm“sediment-hostedgolddeposit”shouldbeusedinabroadsensewhichencompassesatleastthefoursubtypes,i.e.,theCarlintype,themetamorphicfineclastictype,thehydrothermalsedimentarytypeandtheveintype.Inoterwords,the“Carlin-type”shouldnotbeusedasasynonymfor“sediment-hosted”butisrecommendedasasubtypeunderthegeneralcategoryof“sediment-hostedgolddeposits”

  • 标签: 金矿床 秦岭地区 沉积物 矿化作用 成因
  • 简介:Coastallowlandshavelargeareasofhazardimpactandrelativelylowcapacityofpreventiontothewaterrelatedhazards,whichhavebeenindicatedbythewide-spreadfloodhazards,highpercentagesoflandwithhighfloodvulnerability.Increasingpopulationpressureandtheshiftofresourcesexploitationfromlandtoseawillforcemoreandmorecoastallowlandstobedevelopedinthefuture,furtherenhancingthedangerofwater-relatedhazards.Inthispaper,thecoastallowlandsinthenorthernJiangsuprovince,China,wereselectedasacasestudy.TheInterpretationStructuralModel(ISM)wasemployedtoanalyzethedirectandindirectimpactsamongtheelementswithinthesystem,andthereby,toidentifythecausalelements,middlelinkages,theirexpressions,andrelations.

  • 标签: water-related HAZARD hazard-management system INTERPRETATION STRUCTURE
  • 简介:UndergroundprospectingwithintheLubin-Sieroszowiceminingareawhichtookplaceduringlast5years,ledtoadiscoveryofanewtypeofAu,PtandPdmineralisationlocated0-0.5mbelowthecopper-silverorebodyinthesouth-westernpartofthePolishPermianBasin.Thegold-bearingzoneliesmainlyintheWeissliegendessandstone(IowerPermian),butlocallytransgressesthestratigraphicsequenceintotheoverlyingkupferschieferandWerralimestone(Zechstein).

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  • 简介:Inthisstudy,threerapidrepairtechniquesareproposedtoretrofitcircularbridgepiersthatareseverelydamagedbytheflexuralfailuremodeinmajorearthquakes.Thequasi-statictestsonthree1:2.5scaledcircularpierspecimensareconductedtoevaluatetheefficiencyoftheproposedrepairtechniques.Forthepurposeofrapidrepair,therepairprocedureforallthespecimensisconductedwithinfourdays,andthebehavioroftherepairedspecimensisevaluatedandcomparedwiththeoriginalones.Afiniteelementmodelisdevelopedtopredictthecyclicbehavioroftherepairedspecimensandthenumericalresultsarecomparedwiththetestdata.Itisfoundthatalltherepairedspecimensexhibitsimilarorlargerlateralstrengthanddeformationcapacitythantheoriginalones.Theinitiallateralstiffnessofalltherepairedspecimensislowerthanthatoftheoriginalones,whiletheyshowahigherlateralstiffnessatthelaterstageofthetest.Nonoticeabledifferenceisobservedfortheenergydissipationcapacitybetweentheoriginalandrepairedpierspecimens.Itissuggestedthattherepairtechniqueusingtheearly-strengthconcretejacketconfinedbycarbonfiberreinforcedpolymer(CFRP)sheetscanbeanoptimalmethodfortherapidrepairofseverelyearthquake-damagedcircularbridgepierswithflexuralfailuremode.

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  • 简介:AgeopulseseismicsystemwasimplementedtoobtainnewinformationonunderlyingstratabeneaththeYellowRiverDelta.However,owingtotheslippingofseafloorandshallowwater(<25m),freesurface-relatedmultiplesareconflictedwiththeflatprimaries,whichmayinstructtheinterpretersinawrongwayandmakewrongconclusions.Owingtothevariationofmultipleperiods,standardanti-multipletechniquesmaylosetheirpower,suchaspredictivedeconvolution.Surface-relatedmultipleeliminationmethodsareintroducedtoattenuatethemultiplesbasedontheunderlyingwave-equationprinciples.Theresultsjustifiedthemethodonthesingle-channelgeopulseprofile,revealingtherealnatureofthesubsurface.

  • 标签: 黄河三角州 入海口 浅水区域 海底
  • 简介:在华东和NCEP/NCAR每天全球的期末考试从212个车站基于每日的降水数据在从2000~2010的6月和7月的分析数据,frontogenesis的climatological特征和相关发行量被分析了。结果证明那frontogenesis功能在华东非一致地散布。运动学的frontogenesis的不同学期显示出frontogenesis的不同紧张和分布。从不同运动学的frontogenesis学期综合的最强壮的frontogenesis在Jianghuai区域被观察。Frontogenesis事件作为每被分开成四种类型不同砍并且沿着在850hPa的强壮的frontogenesis乐队的水平风的集中类型。四种类型包括温暖砍类型,冷砍类型(与二种子类型),西方风集中类型,和东方风集中打字。在不同frontogenesis类型的事件在过去的十年与不同频率发生。温暖砍类型最经常发生。frontogenesis的不同类型有特殊水平、垂直的结构。强壮的frontogenesis与se平行的340-K轮廓被展示到正面的地区在垂直。在气旋或反气旋,风集中,以及垂直发行量结构的转移地点和力量表明的改变的大规模发行量模式与frontogenesis的不同类型被联系。而且,在frontogenesis和降水之间的强壮的积极关联被发现,即,越强壮frontogenesis,有越多猛冲。每日的降水与有关温暖砍类型frontogenesis最大,并且经常与强壮的frontogenesis带与一样的取向发生在正面的地区内。第二最大的每日的猛冲与寒冷发生砍类型frontogenesis,和相关降雨通常被观察到正面的地区的南方,与延长的雨带向东北。与西方风集中类型frontogenesis有关的降水是第三最大,主要在正面的地区的南方发生。

  • 标签: 锋生函数 环流模式 气候特征 中国 降水资料 东亚
  • 简介:Fluidinclusionstudiesof5golddepositsconnectedwithalkalinerocksshowthatquartzseparatedfromauriferousquartzveinscontainsabundantthree-phaseCO2-NaCl-H2Oinclusionsandtwo-phaseCO2-dominatedones,measuring5-20umindiameter,Homogenizationtemperaturesofthefluidinclusionsaremostlywithintherangeof150-300℃,andthesalinities,mainly0.2wt%-12wt%(NaCl),Goldmineralizationsoccurredatdepthsof1.4-2.8km,Themoststrikingcharacteroffluidcompositionisthatamongthecations,Na^+indominant,followedbyK^+,Ca^2+,amongtheanions,Cl^-isslightlyhigherthanSO4^2-,Intheevaporate,H2Oisdominant,followedbyCO2,ThepHvaluesaremainlywithintherangeof6.5-8.5,indicatingthattheore-formingsolutionsarealkalineinnature.Thehydrogenandoxygenisotopicratiosindicatethattheorefluidiscomposedmainlyofmagmaticwater.Withthedroppingoftemperatureintheorefluid,thecontentsofCO2decreasedwhilethesalinityincreased.TherelationsbetweenAuandothercomponentsoftheorefluidarediscussedinthepaper,anditisconcludedthatinthesedeposits,Chlorides,H2S,SiO2,CO2,etc.inthefluidallareinvolvedinthemigrationandconcentrationofAu.

  • 标签: 金矿床 碱性岩 地球化学 流体包裹体 成矿作用
  • 简介:Calmodulinisacalciumbindingproteinthatmodulatestheactivityofdiversegroupsofproteinincludingsomeproteinkinase,adenylatecyclasesandATPase.HereweusethetotalDNAofSonneratiaparacaseolarisasthetemplateofthepolymerasechainreaction(PCR).ThePCRprimershavebeendesignedandsynthesizedaccordingtothe5-and3-terminaloligonucleotidesequencesofCalmodulingeneofplantsinGenbankandligatedwithcloningvectorpBsk(+).Therecombinantcloneshavebeenobtainedfromtheselectedmedium.TheresultsofDNAsequencesanalysisshowthatthenucleotidesequencesofORFsharemorethan85%homologiesascomparedwiththoseofcalmodulingenesofseveralotherplants.Similartoriceandapple,theORFisinterruptedbyanintronbehindthe75thnucleotide.

  • 标签: Sonneratiaparacaseolaris CALMODULIN gene POLYMERASE CHAIN REACTION
  • 简介:类Cylindrotheca与一些由海洋的硅藻的一个小组组成描述的种类。十一当Cylindrothecadosteriummorphologically与他们小子单元的ribosomalRNA(SSUrDNA)和在这决定的编码叶绿体的rbcL基因序列学习的原子编码从Jiaozhou海湾被获得,识别的硅藻孤立。有趣地,SSUrDNA的很高的顺序分叉和rbcL基因在这些之中被发现孤立,并且相对引起推出的氨酸的很少变化的rbcL基因的众多的核苷酸变化定序。分别地,种系发生的分析基于SSUrDNA和rbcL基因组织了isolates进6clades。SSUrDNA的种系发生的树放了Cylindrotheca一起孤立的所有,清楚地把他们分开成二个系。系我由十一C组成。和另一C在这研究获得的dosteriumisolates。dosterium孤立,但是某clades很好没被支持。系II包含了二C。dosterium孤立并且一C。纺锤形孤立。Cylindrotheca孤立进二well-definedlineages的也分开的rbcL基因的种系发生的分析。十一C。dosterium孤立形成了一个系,所有clades强烈被支持。SSUrDNA的统计比较显示在我是的系以内的平均距离比另外的微水藻种类的显著地高(P<0.01)。这些结果在C以内建议了神秘种类的存在。dosterium。

  • 标签: 硅藻属 新月柱鞘藻 复合种 rbcL基因变异 SSU RDNA
  • 简介:ThispapercalculatesthestaticCoulombstresschangesgeneratedbyfourearthquakesintheYutianareaduring2008~2014separately,thendiscussesthetriggeringinfluence,theiraccumulatedCoulombstresschangesandtheirinfluenceonnearbyfaults.TheresultsindicatethattheMS5.5earthquakein2011andtheM_S7.3earthquakein2014arebothintheregionswheretheCoulombstresschangeispositive,thestresschangesare0.004MPaand0.021MPa,respectively,meaningtheyaretriggeredbypriorearthquakes.TheMS6.2earthquakein2012occurredintheplacewhereCoulombstresschangewasnegative,soitispostponedbythepriorearthquakes.TheimageofCoulombstresschangesoftheMS7.3earthquakein2014isinaccordwithaftershocks(ML≥3.0)distribution,butsomeregionsonthefaultwheretheCoulombstresschangeispositivehavefewaftershocks,andstrongaftershocksmayoccuratthesedistrictsinfuture.Inaddition,thispapercalculatestheCoulombstresschangeonnearbyfaults,andfindsthattheCoulombstresschangesofdifferentelementsintheGGCfaultareverydifferent,andmustreceivestrongtriggered-influence,thoughtheresultmaybeinfluencedbytheinputfinitefaultmodel,sothereisstillalargeearthquake-risk.TheGGN,PLC,PLWandLBWfaultswerealsotriggeredbythefourearthquakesoccurringbetween2008~2014.TheirmaximumCoulombstresschangesallexceed0.002MPa,sotheyalsohaveastrongearthquakehazard.

  • 标签: 地震触发 触发效应 静态应力 应力变化 故障模型 强余震
  • 简介:六份ISSR教材被采用显示不同阶段的多型性和红水藻Gracilarialemaneiformis的性,并且他们中的二个,P1和P3,放大不同乐队模式。女配偶体的教材P1放大的ISSR模式与那oftetrasporophyte相同,但是从男配偶体的不同。教材P3生产的乐队,一个人对女配偶体特定。三片词法上类似的复叶能容易用ISSR技术被识别。二个特定的标记,SM1andSF3与男配偶体和女配偶体有关,被克隆并且定序。SM1的相应序列被发现编码假想蛋白质。没有能在GenBank被发现的SF3的相应顺序。

  • 标签: 相位 性别 多态现象 配偶体 水生生物
  • 简介:与东方中国夏天降雨(ECSR)联系的气候的特征在美国的大气的研究(NCAR)社区气候模型版本3的国家中心(CCM3)被检验,并且从1978年9月与演变时间的海表面温度(SST)跑到1993年8月。CCM3被显示捕获ECSR的突出的季节的特征。作为许多另外的气候模型,然而,有在CCM3的ECSR的一些不现实的设计。最不能接受的是西藏的高原和它的向东北的延期的东方圆周上的错误地加强的降水中心。人工的强壮的降雨中心被与降雨数据和欧洲人为中等范围的天气预报(ECMWF)分析集中的车站降雨数据,谢和Arkin(1996)的产品作比较相当估计(吉布森等,1997)。涉及降雨中心的形成的物理过程被讨论。初步的结论表明它是在引起重降雨的CCM3的过高估计的理智的加热在上并且在西藏的高原附近。在西藏的高原的东南和东北上的理智的加热赞成在东方中国上形成强大的副热带的反气旋的假强壮的表面。假冒的围住的副热带的反气旋中心让潮湿的西南风在西藏的高原的东方圆周上系住并且延长到它的东北。在中国的东南海岸,在副热带的反气旋的东南方面上定位,西南季风被东北风在一些情况中减少并且甚至代替了。因此,在CCM3,降水在西藏的高原和它的东北延期的东方圆周上被夸大并且在中国的东南海岸被低估。关键词东方中国夏天降雨-模型确认-副热带的反气旋-加热这研究的Diabatic被中国科学院在为联合气候的鈥?确认的百才能鈥?建模的资助鈥?下面赞助鈥?和国家天赋中国(资助No.49823002)的科学基础,并且国际机场革新资金(号码8-1204)。

  • 标签: EASTERN China SUMMER rainfall. Model validation.