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1 TheDistributionandCharacteristicsoftheTFZThenortheasternpartofTFZbranchesintoYilan -ShulanFaultandDunhua -MishanFault (Fig 1) .Yilan-ShulanFaultisastrike -slipfaultandabout 10 0 0kmlong ,extendsNE ,dipstothenorthwestwithdipan gle 70 (,andlocallydipstothesoutheast .… 相似文献
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IntroductionEnvironmentalisotopetracingisoneofthemostlyadoptedadvancedtechniquesinresearchofhydrologicalcycle (ClarkandFritz,1 997;F 相似文献
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1FRACTALTHEORYANDFLOODCALAMITIESThemostregulargeometricobjectswhichcouldbemeasuredbylengthsofspecificityaretheissueofclasica... 相似文献
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刘建国 《中国海洋湖沼学报》2002,(2)
INTRODUCTIONSomeω3andω6long chainedpolyunsaturatedfattyacids (PUFAs)havebeenrecognizedasanessentialcomponentsinhumannutrientsduetotheirtherapeuticeffectsandrolesinmaintainingcellmembranesstructure ,fluidityandfunction .AmongthesePUFAs,arachidonicacid (AA ,2 0… 相似文献
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INTRODUCTIONThetoxicityofheavymetalsreleasedintotheenvironmenthasrecentlytriggeredanumberofstudiesaimingattheremovalofmetalionsfromaqueoussolutions (FourestandVolesky ,1 997;FehrmannandPohl,1 993 ;KuyucakandVolesky,1 989) .Itwasfoundthattheaccumulationofheavymeta… 相似文献
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太子河流域西部竹蜓类动物群,以本溪—牛心台地区为最发育,一般可划分为一个共存延限带,一个组合带,后者又可进一步划分为3个组合亚带。ⅡFusulina-Fusulinela组合带3Fusulinacylindrica-F.quasicylindrica组合亚带2Fusulinelaprovectu-Fusulinapseudokonnoi组合亚带1Fusulinaschelwieni-F.mayiensis组合亚带ⅠProfusulinelaparva-Eostafelasubsolana共存延限带Profusulinelaparva系作者等研究辽南竹蜓类并建带的带分子,Eostuffelasubsolana为盛金章教授建立的辽东本溪群下部竹蜓带的带分子,时代为中石炭世早期。Fusulina-Fusulinela组合带代表本区及东北南部最发育的竹蜓类动物群。该带属于中石炭世中—晚期,也是太子河流域最大海侵期。以上二个竹蜓类生物带总体应属于Moscovian阶,时代为中石炭世。 相似文献
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1 ADVANCINGOFTHEQUESTIONANDCONSTRUCTIONBACKGROUNDOFSUZHOUINDUSTRYGARDENPerroxgavespecialattentiontotheeffectofimportantitemsandconstructionofinfrastructurewhenhediscussedtheproductionofgrowthpole(Li,1988).Lotsofdomesticscholarshavealsoprobedintothi… 相似文献
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Elementscyclingandenergyflowaretheimportantresearchcontentsinecosystemfieldsandresiduade-compositionisthekeyprocessofnutrimentalelementscirculationSWIFTetal.1979.Theresiduade-compositionrateplaysanimportantroleindecidingtheproductivityandbiomassof… 相似文献
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Fromtheendofthenineteenthcenturytothebeginningofthetwentiethcentury,Davis(1899)providederosionalcirculartheory,tookgeomorphiccharacteristicsasthefunctionsoftectonicforcesandtime,dividedgeomorphicgrowthintothreephases:young,middleagedandold,andthenra… 相似文献
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INTRODUCTIONThesinglecellsandprotoplastsofPorphyragametophytebladescoulddevelopintoplantletsdi rectlyorintocallus likecells (ZhaoandZhang ,1 981 ;Polne Fulleretal.,1 984 ;Chen ,1 989;WangandYan ,1 990 ;Galletal.,1 993;Chen ,1 997;MeiandFei,2 0 0 1 ) ,andtheirgrowthanddevelopmentunder… 相似文献
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INTRODUCTIONThehorizontalcurrentintheseaoroceanisamajorfactoraffectingsedimenterosion ,trans port,deposition ,etc.Therefore,mostworkdonewasontheeffectofhorizontalcurrent.Fewo ceanographershavetakennoteoftheinfluenceofverticalcirculationonthesuspendedmatte… 相似文献
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IntroductionArchaefructus ,theoldestknownangiosperms ,werefoundfromtheUpperJurassicJianshangouFormation (i.e .theformerlowerpartofYi 相似文献
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陈国阶 《中国地理科学(英文版)》1999,(4)
1 INTRODUCTIONNowadaysthedevelopmentofworldindustriesandeconomyischaracteristicofafewconspicuoustrendswhichmaychallengetraditionaleconomicdevelopmentmodelsandtheories.Firstofall,theeconomyoftheworldhasbeenbecominginglobalspace,ofwhichtheremarkablei… 相似文献
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陈亚宁 《中国地理科学(英文版)》1999,9(4):373-376
1 THEANALYSISOFSOILEROSIONFACTORSTheintensityofsoilerosioninaridareavarieswithaltitude,moistureandheatconditionandsurfacelayer(Chen,1995).Inmiddleandhighmountainsections,thereisalittlemoreprecipitation(450-796.90mm),richervegetationcovermorethan60pe… 相似文献
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ThewaterpollutionintheSecondSonghuaRiverhasbeenpaidmuchattentiontoforalongtime.Manyenvironmentalscientistshavedonealotofresearchworkonit,butmostofresearchcontentsweretofocusonheavymetalpollutionandorganicpollutioninwater,andlittleaboutnitrogen(Fuet… 相似文献
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1IntroductionEarthvisionsoftwareintroducedfromU .S .DGIcompanycanplayanimportantpartinbothspatialgeo logicmodelingandcompilingdifferentmaps .Ontheba sisofrealizingsandbodymodelinganddatainterfacebe tweenDaqingblack -oilandEarthvision ,theFaciestractmodelhas… 相似文献
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Wave assimilation and numerical prediction 总被引:10,自引:0,他引:10
INTRODUCTIONDataassimilationwasusedinearlynumericalweatherpredictiontoimproveforecastaccuracy.Forecasterrorsresultfromseveralmainresources:thefirstisphysicalapproximationinthedynami calequationsofthemodel;thesecondisthelowqualityoftheinitialconditionsa… 相似文献
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JIANG Qigang 《东北亚地学研究》2002,(2)
1IntroductionLanduseandcoverchanges (LUCC)andaccompa niedenvironmentalchangessuchassoildegradationbe camemoreandmoreseriousinrecentdecades .There foremanyresearchesinChinaandabroadareengagedinLUCCandsoildegradationstudy ,suchasWuChuan jun,etc .(1994 ) ,FengZhimi… 相似文献
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INTRODUCTIONMicrocystisaeruginosawasthemainbloom formingspeciesinDonghuLake;occurredonlysporadicallyinthe 1 950s,increasedrapidlyinnumberinthe 1 960s.Fromthemiddleofthe 1 970stothemiddleofthe 1 980s,thicklayerofitsbloomcoveredthelakesurfaceeverysummer,attract ingfo… 相似文献