共查询到20条相似文献,搜索用时 31 毫秒
1.
Research activities on land-use/cover change in the past ten years in China using space technology 总被引:8,自引:0,他引:8
1 INTRODUCTIONTherecentandfuturedevelopmentofspacebasedremotesensingtechnologyhasbroughtareformationtoresearchworkaswellasformulatingsuitablepolicyforpopulation,resources,environmentanddevelopment.Throughrealtimeandperiodicobservationsofalargear… 相似文献
2.
王红扬 《中国地理科学(英文版)》1999,9(4):350-357
Urbanlandisthemaincarrierofhumandevelopment.Atthesametimelandisabasicmeansofproductivity.Urbanlandevolutionsensitivelyreflectstheprocess,tendencyandcontradictionofdevelopment.Thispaperfirsttheorizesthegeneralinterpretationonurbanlandevolution.The… 相似文献
3.
CulturalgeographyinChinaisasubjectthathasevolvedfromtheancienttimesthroughmoderntimes,anddistinguishedachievementshavebeenaccomplishedduringallthisperiod(Wang,1991).Yetitisa“newlyestablished”inquiryinChinainthesensethatnosubstantialprogresshasbeenm… 相似文献
4.
TheYarlungZangboRiver,alargeriverwithhighestaltitudeintheworld,2057kminlength,flowsthroughthesouthernpartoftheQinghaiXizang(Tibet)Plateaufromwesttoeastanddrainsanareaof240480km2beingasensitiveareatotheenvironmentalchanges(Guanetal.,1984;Yangetal.,… 相似文献
5.
Life cycle and production of chironomidae (diptera) in Biandantang, a typical macrophytic lake (Hubei, China) 总被引:2,自引:0,他引:2
阎云君 《中国海洋湖沼学报》2000,18(3):221-226
INTRODUCTIONAlthoughdescriptionoflifehistoryandestimatesofanimalproductionhavealonghistory (Lin degaard ,1 989) ,fewstudiesontheproductionrateofbenthicmacroinvertebrateswerecarriedoutinChinesewaters (Liang ,1 984 ) .Withthedevelopmentoffisheriesandthedeterioratio… 相似文献
6.
王克林 《中国地理科学(英文版)》1998,(3)
I.INTRODUCTIONItisgeneralyacceptedthatthedegradationofrenewableresourcesandfragileenvironmentsindevelopingcountriesisbecomin... 相似文献
7.
ZHU Jin-hua 《中国地理科学(英文版)》2001,11(3):278-282
1INTRODUCTIONWiththerapiddevelopmentandapplicationofnewtechniquessuchascomputercartographyhasenteredthe21stcentury′sdigitalperiodfromcomputerassistmappinginthe1970straditionalmaprepresentationhastransformedfrom2Dmonomediumstaticinto3Dmultim… 相似文献
8.
DEGRADATION OF NATURAL RESOURCES BY ENVIRONMENTAL POLLUTION——A Comparative Study Between Huizhou City and Zhaoqing City 总被引:2,自引:0,他引:2
1 INTRODUCTIONBothresourceandenvironmentarerelativeconceptions,whicharerelativetothesystemstheyreferto.Theenvironmentofacertainarea(oracertainbusiness)ispossiblytheresourcesofthesurroundingareas(oranotherbusiness).Theatmosphere,waterbodiesandsoilont… 相似文献
9.
Socalledfreeeconomicregionisaspecialregionwithoutjurisdictionofcustoms,delimitedbyonecountry.Inthisregionvariouspreferentialpoliciesofreducingorremittingtaxationareimplemented.Itcanprovidemanyconvenientconditionsforfreeflowofinternationalcommodity… 相似文献
10.
REANALYSIS OF PRINCIPAL COMPONENT ANALYSIS TO RESUME PAST VEGETATION AND ENVIRONMENT——Taking Fenzhuang Profile in Beijing as an Example 总被引:1,自引:0,他引:1
张佳华 《中国地理科学(英文版)》1998,(3)
I.INTRODUCTIONAtpresent,globalclimatechangehavebeenwidelypaidatentiontointernationaly.Climaticandenvironmentalchangesfromloc... 相似文献
11.
TheintenseupliftoftheQinghaiXizang(Tibet)Plateauinthelastseveralmillionyearshasgivenrisetodrasticchangesofnaturalenvironmentanddistinctdifferentiationoftheplateauproperandtheneighborregions.Recentprogressinstudiesonpalaeogeographicalevolution,diff… 相似文献
12.
Several problems about the eco-environmental research on the source regions of the Changjiang River and the Huanghe River 总被引:1,自引:1,他引:0
1 INTRODUCTIONInrecentyearstheecoenvironmentoftheChangjiangRiverbasinsufferedfromseveredestruction,sedimentcontentintheriverwatergreatlyincreased,thedownstreamcoursewasseriouslysiltedupandfloodcontrolcapacitywasweakened.Thesimilarsituationalsooccu… 相似文献
13.
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
14.
1 CHANGESOFINDUSTRIALSTRUCTURE1.1 ChangesofStructureofThreeEconomicSectorsSincethereformofeconomicsystemandopeningtotheoutsideworldinthelate1970s,theindustrialstructureofGuangdongProvincehasbeenexperiencinganobviousprocessofnonagriculturalizationw… 相似文献
15.
ThewaterpollutionintheSecondSonghuaRiverhasbeenpaidmuchattentiontoforalongtime.Manyenvironmentalscientistshavedonealotofresearchworkonit,butmostofresearchcontentsweretofocusonheavymetalpollutionandorganicpollutioninwater,andlittleaboutnitrogen(Fuet… 相似文献
16.
Landscape ecological construction and biodiversity protection 总被引:1,自引:0,他引:1
Landscapeecology,producedbyaGermannamedC.Trollin1939,wenttoresurrectioninthe1980safterhavingwaveredforoverfortyyears,andnowithasbeenanimportant,complicatedandcomprehensivecrossdiscipline.Inthe21stcentury,thesocialsustainabledevelopmentwillbethemajo… 相似文献
17.
陈国阶 《中国地理科学(英文版)》1999,(4)
1 INTRODUCTIONNowadaysthedevelopmentofworldindustriesandeconomyischaracteristicofafewconspicuoustrendswhichmaychallengetraditionaleconomicdevelopmentmodelsandtheories.Firstofall,theeconomyoftheworldhasbeenbecominginglobalspace,ofwhichtheremarkablei… 相似文献
18.
Study on transmission mechanism of thermal infrared remote sensing for abrupt geothermal anomaly in volcanic region 总被引:2,自引:0,他引:2
Geothermalanomalyisaphenomenonthatundergroundtemperatureandgeothermalgradientincreasesmuchmoreintheareathanitssurroundings(Xia,1979).Abruptgeothermalanomalymeansthatundergroundtemperatureonsomespotsaswellastheaffectedtemperatureofsurroundingareaabr… 相似文献
19.
1INTRODUCTIONSeverewaterpolutionandwaterresourcesshortageshavebecometwokeyobstructionstorealizesustainableutilizationofwate... 相似文献
20.
罗守贵 《中国地理科学(英文版)》1999,9(3):213-220
Marriageisoneofthemostcommonestandoldestculturalphenomena,andalmostallmarriagesinvolvethemigrationofindividuals.Fromthispointofview,marriageisoneofthemostimportantfactorsthatresultinpopulationmigration.Afterreviewingallpreviousresearchesonpopulatio… 相似文献