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1.
1 STUDIEDREGIONANDANALYSISMETHODLocatedatnorthwesternmarginofTenggerDesertand70kmnortheastofMinqinCountyinGansuProvince,QingtuLakebelongstotheShiyangRiverDryDelta,andthealtitudeis1292-1310m.Theregionhasthecharacteroftemperatecontinentalariddesertcli…  相似文献   

2.
TheJournalofGeoscientificResearchinNortheastAsia (J .Geosci.Res .NEAsia)issponsoredbytheInternationalCentreforGeo scienceResearchand  相似文献   

3.
1 IntroductionGeospacedealswiththeEarth’smiddleandupperatmosphere ,thermosphere/iono sphereandmagnetosphere .This“geospaceenvironment”isofgreatscientificandpracti calinterest,particularlyasitisoftensubjecttodisturbances.Ablastwavefromthesuncancompressthem…  相似文献   

4.
INTRODUCTIONItiswellestablishedthatinmammals,growthhormone (GH)elicitsitsgrowth promotingac tionindirectlythroughtheinsulin likegrowthfactor I(IGF I)producedmainlyintheliver.Asforteleostfishes,Inuietal.(1 985 )reportedstimulatinginvivoandinvitroeffectsofovineGH…  相似文献   

5.
THE SOCIAL IMPACTS OF TOURISM──A Case Study in Dali,Yunnan Province,China DaiFan(戴凡)(DepartmentofGeographyandPlanning,Univers...  相似文献   

6.
INTRODUCTIONAccumulatedevidencessuggestedaclosecorrelationbetweenneoplasticdiseaseofaquaticor ganismsandtheincreasingreleaseofgenotoxinsbyanthropogenicactivitiesintoaquaticenvironment(Mix ,1 986;Gardneretal.,1 991 ;GESAMP ,1 991 ) .Ithas,therefore,becomenecessarytoe…  相似文献   

7.
THERECENTECONOMICDEVELOPMENTOFCHINA'S'MILLION'CITIESNingYuemin(宁越敏)(TheInstituteofWestEuropeanandNorthAmericanGeography,EastC...  相似文献   

8.
CommonBorelradiiofameromorphicfunctionanditsderivativeintheunitdiscZHANGQing de 1( 1)………………………………………………………………………………α scalebiorthogonalmultiwaveletpacketsXUQiong WANGLi qing 1( 5)……………………………………………Auniversalindexformulaofwaterqualityevaluationsuitedtomulti p…  相似文献   

9.
THE STEPS FORWARD OF GIS IN CHINA   总被引:2,自引:0,他引:2  
1 HISTORICALSTEPS—ATEMPORALANA LYSISResearchesofGISinChinacandatebacktotheearly 1980s .Atthattime ,aremotesensingapplica tionprojectwascarriedoutinSouthwestChinausingGISmethodintegratedwithremotesensingdatatosolvetheareameasurementautomatically .Afterthefir…  相似文献   

10.
SecretaryofthePartyCommitteeLuo’sTalksontheEndofWorkMeetingofGuangxiLandandResources 1( 1-7)………………………………DeepenReformationwithOneHeartandOneMind OpenUpaNewProspectofGuangxiLandandResourcesAdministrationYangZheng -zhong 1( 9-14 )…………………………………………………………………………………Re…  相似文献   

11.
A temperature inversion in "Chinese Arctic Research Expedition 1999   总被引:3,自引:1,他引:2  
1 IntroductionTheArcticarea ,asthebackgroundofglobalclimateandenvironment,drawspeo ple’sattentionwithitsimpactonglobalchange (IPCC 1 990 ) .Greatamountofenergyandmassareexchangedbetweentheseaandairwithspecialinterface,air ice seasurface ,inthisarea .Thereforeiti…  相似文献   

12.
No .1ANewGeochemicalClassificationofElements QiChangmouandL .LynnChyi(1)…………………………………TheFaultBlock’sFrameworkinBoliBasinanditsContro  相似文献   

13.
INTRODUCTIONMorethanadecadehaspassedsincebacteriawasrecognizedasquantitativelyimportantcon sumersoforganiccarboninmarinefoodwebsandmarineecosystems (Fuhrman ,1 992 ) .ThebasicinformationonthesignificanceofthemicrobialfoodwebwaspresentedbyPomeroy ( 1 974 ) ,whopie…  相似文献   

14.
WATERRESOURCEINQILIANMOUNTAINOUSREGIONANDITSINFLUENCEONECO-ENVIRONMENTOFHEXICORRIDOR¥ChenChangyu(MeteorologicalBureauofGansuP...  相似文献   

15.
INTRODUCTIONTheproxyofstableoxygenisotopeinlakecarbonateisidealforthereconstructionofpastcli mate (Gasseetal.,1 991 ;Wu ,1 996;Zhangetal.,1 994 ) .Asidefrombeingimpactedbylake watertemperature ,thevalueofδ18Oinlakecarbonateisalsocontrolledbythatofambientlakewa ter.High…  相似文献   

16.
INTRODUCTIONNoctilucascintillanshastwotypesofcelldivisions:vegetativedivisionandmeioticprocess.Inthemeioticprocess,thecelldividesseveraltimeswithoutcytoplasmicdivision .Afterthenucleardi visions,upto 2 10 zoosporesareformedfromonemothercell.Thesignificanceo…  相似文献   

17.
根据Olney及其同事[1]以及更早的Lucas、Newhouse和其他研究者的工作,Olney在70年代提出了兴奋性毒性(excitotoxin)的原始概念及兴奋性毒性这一专门术语。这些工作认为过量的兴奋性氨基酸(excitatoryaminoacid,EAA)─—谷氨酸(glutamicacid,GLU)、GLU的类似物门冬氨酸(asparticacid,ASP)等─—能过度兴奋中枢神经系统(centralnervoussystem,CNS)内的GLU敏感神经元而达到使它们致死的程度。在过去…  相似文献   

18.
INTRODUCTIONEstuariescompriseamajorbiogeochemicalinterfaceconnectingthelandandthesea (Man toura,1 987) .Thebehaviorandfateofaparticularriver bornesubstanceintroducedintoanestuaryisdeterminedtoalargeextentbythebiogeochemicalpropertiesofthesubstanceaswellasp…  相似文献   

19.
INTRODUCTIONJohannes (1 965)firstshowedtheimportanceofprotozoaasremineralizersinmarineenvironments.Thesignificanceofprotozoainthefreshwaterfoodwebhasbeenknownforthepast2 0years.Protozoaisamainpredatorofplanktonicbacteriaandphytoplankton ,andalsoafoodsourceo…  相似文献   

20.
TITLEPAGE:Toincludethetitleofthepaper,nameoftheauthorinstitution(affiliation),city.ABSTRACT:Tobeplacedonthelowerpartofthetitlepage,oronaseparatepage,Itshouldbenolongerthan5%ofthearticle.TEXT:ManuscriptsshouldbesubmittedinEnglishonnomorethan15typewrittenpage…  相似文献   

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