简介:基于遥感(RemoteSensing,RS)、地理信息系统(GeographicInformationSystem,GIS)和全球定位系统(GlobalPositionSystem,GPS),即3S技术,应用面向对象的自动分类与人机交互分类结合判读方式,以SPOT、TM影像为背景,结合地面调查样地及历史资料,准确获得岗巴县草原类型空间分布现状图件及统计数据。根据本次调查结果表明:岗巴县草原总面积为365222.89hm2,占岗巴县国土面积86.94%。该县草原类型共划分4个草原大类、6个草原亚类、21个草原型。各类草原类型面积最大为高寒草原类,占总草原面积58.66%;其次是高寒草甸类,占38.61%;第三位是高寒草甸草原类占2.56%;低地草甸类面积最少,占0.18%。该县草原退化、沙化、盐渍化面积为3809.91hm2,占该县草原面积的46.36%,其中草原退化面积31.44%;草原沙化占12.96%;草原盐渍化占1.96%。草原畜牧业是该县农牧民收入的重要来源,科技与政策支持是恢复草原资源,改善生态环境及可持续发展畜牧业的重要对策。
简介:利用概率度量空间中A—proper映射拓扑度的基本性质,在投影完备的Z—P—S空间中研究了非线性映射的不动点问题,得到了一些新的结果.
简介:""Mensaytheyhatetoshop,""saysZhukin,CityUniversityofNewYorkSociology(社会学)professor.""Yetwhenyouaskthemdeeperquestions,itturnsoutthattheyliketoshop.Mengenerallyliketoshopforbooks,musicandhardware.Butifyouaskthemabouttheshoppingtheydoforbooksormusic,they'llsay,'Well,that'snotshopping.That'sresearch.'""
简介:Romanticismisanimportantstageintheevolutionofman’sself-consciousness.Itshowsnewinterestinandnewconcernwithmanandnature.Wordsworthiswell-knownasanaturepoet.Thethemeofhumanmindandnatureinhispoemshaslongattractedreaders’attention.However,hedoesnotindulgeinnatureitselfbuttakesitasconsolationandinspirationforhumankind.Inordertohighlightthepoet’sconcernwithhumanmind,thepresentpaperchoosestoexploreWordsworth’sconcernwithchildren’smind,basedontheanalysisofWordsworth’sThePreludeandmanyofhispoemsaboutchildren.
简介:Sinceancienttimes,asoneofthesymbolsofuglyanddirty,prostitutesareinvariablylivingintheblackmarginsofsociety.Facingprostitutes’miseries,peoplealwayscannotunderstandtheiremotions,mentalitiesanddesires,ortreatsthemasequals,particularlyaswomen.ProstitutesareaspecialgroupintheoppressedwomeninWesternsocieties.MargaretandNanaaretwotypicalimagesoftheminthehistoryofwesternliterature.Withtearsandlives,theydeducetheirmiserablelifestoriessimilarly.