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1.
Aeropalynology,abranchofpalynologyspeciallydealingwithairbornesporopollencontentanditsvariations,iscloselyrelatedtomanydisciplineslikeplantgeography,bioclimatology,agronomy,andmedicalscienceforwhichalsoneeditsresearchresults.Numerousresearcheshavebeenca…  相似文献   

2.
orthernShaanxiisoneoftheregionsexperiencingmostserioussoilerosioninChina.Substantialresearchesindicatedthatinadditiontophysicalfactorsthatplayadecisiveroleininducingsoilerosion,humanfactorsthataccelerateerosionprocesscannotbeignoredeither[1,2,4].NorthernS…  相似文献   

3.
JournalofSaltLakeResearchisascientificperiodicalofnaturalsciencewhichisapprovedbytheNationalScienceCommittee,sponsoredbyQinghaiInstituteofSaltLakes.andpublishedbySciencepress.Ourtasksaretocoverandexchangetheresearchreports.scientificpapersandaccomplish…  相似文献   

4.
Citysizedistributionofnationalurbansystemshasattractedconsiderableresearchinterest.Theissueisalsocriticaltogovernmentpolicyasitisassociatedwithpopulationdistribution,unevendevelopment,andgeopolitics.Previousresearchefforthasgreatlyenhancedourunderstand…  相似文献   

5.
1IntroductionStudiesonchemicalcharacteristicsinsnowpitareveryimportantinresearchofmodernprocesesinsnowandice,whichisbasiccont...  相似文献   

6.
陈锦年 《极地研究》1999,10(1):69-75
1IntroductionBeforethe1980s,Antarcticinvestigationsandtheirresearchdatawererelativelyfew.Sincethe1980s,alongwiththedevelopm...  相似文献   

7.
1INTRODUCTIONInfluenceoflanddesertificationonregionalenvironmentalchangehasinthepastfewdecadesbecometheresearchfocusofmanysch...  相似文献   

8.
薛祚  张研 《极地研究》1998,9(1):51-60
Psychologicalselectionmethodsforwinter┐overmembersoftheChineseNationalAntarcticResearchExpeditionXueZuohong(薛祚●)andZhangYan(张...  相似文献   

9.
ResearchofthemorphologyofZhejiangcoastalportcitiesWangYichengDeptofGeography,NingboNormalUniversity,Ningbo315211,CHINAWuQiya...  相似文献   

10.
PsychologicalchangesoffifteenChineseAntarcticResearchExpeditionmembersXueZuohong(薛祚)(DepartmentofPsychology.PekingUndersity,B...  相似文献   

11.
AsurveyofSO2,NO2andNH3concentrationsinatmosphereathighlatitudesandinArcticChenLetian(陈乐恬)andTongYuqin(佟玉芹)ResearchCenterforEc...  相似文献   

12.
闫明 《极地研究》1997,8(1):67-73
ApreliminarystudyonoxygenisotopeoficecoresofColinsIceCap,KingGeorgeIsland,AntarcticaYanMing(闫明)PolarResearchInstituteofChina...  相似文献   

13.
Withanareaof1.2millionkm2,andanaltitudeof4000m,theTibetanAutonomousRegionconstitutesthemainpartoftheQinghaiTibetanPlateau,oneofthethreenaturalrealmsinChina.Itconsistsofaseriesofhighmountainsandhighlandswithmanywidevalleysandbasinssandwitchinginbetween.TheH…  相似文献   

14.
I.IntroductionTheconceptofecotonehadbeenproposedinecologyandtheecotoneproblemwasdefinitelyputintoresearchprogramgraduallyfromtheInternationalBiologicalProgramme(IBP)(1960s),theManandBiosphereProgramme(MBP)(1970s),totheInternationalGeosphereandBiosphereProgram…  相似文献   

15.
ThevisitorsgivethecaveenvironmentagreatdealofCO2.AverageCO2contentofthevisitorsis13,00015,000ppminthebreedingandonevisitorbreeds40litreofCO2perhour.ThevisitorsstronglyinferencetheCO2contentinthecaveatmosphere.Inspring,CO2contentwas500-600ppminNo.1andNo.2chambersat8:008:…  相似文献   

16.
ChangesoftherelationshipbetwenpopulationandenvironmentintheYangtzeRiverValeyinhistoryZHANGDixiangSUNPingThePopulationResearch...  相似文献   

17.
甄卫民  曹冲  吴健 《极地研究》1994,5(2):53-57
AnalysisoftheionosphericanomalyatGreatWallStation,AntarcticaZhenWeimin(甄卫民);CaoChong(曹冲)andWuJian(吴健)(ChinaResearchInstituteo...  相似文献   

18.
Ithasbeenatendencytoconstructatouristdestinationintoatouristcommunityinrecenttourismdevelopment.Becauseofwideconnectionsintourismswithothersectors,itisdifficultfortourismoperatorstoguaranteeasmoothtravelonlybythemselves.Inordertomaketraveleasy,tourismo…  相似文献   

19.
IntroductionSolutionasakarstgeomorphologicalprocessinlandformdevelopmenthaslongbeenrecognized.Sincethekarstprocessesarealmostentirelysolution,thoughkarstlandformsarenotonlycausedbysolutionbutalsobyerosion,thecirculationandchemicalcompositionsofkarstun…  相似文献   

20.
I.ProgressofUrbanizationinChinaExperiencedFourStages1.19491957activeurbanizationperiodWhenthePeople’sRepublicofChinawasfoundedin1949,therewereonly132citieswithatotalurbanpopulationof39,490,000throughtoutthecountry.Thelevelofurbanization(referringtoratiosofthetotalp…  相似文献   

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