简介：Bothmorphologicalcharactersandaportionofof28SrDNAsequenceswereusedtoidentifyingTomicusspecies.Thespecimenswereclassedintogroupswiththefollowingcharacters:1)granulesorpuncturesoninterstria2onthedeclivityoftheelytra;2)lengthoftheelytralinterstrialhairsandhairsarisingfrompunctures;3)arrangementofpronotalpuncturesandhairs.Thesecharacterscouldbeclearlyexaminedunderabinocularmicroscopeat30×magnificationandtheywereapplicableandvaluablefortheforestentomologiststoidentifyTomicusspecies.Thephylogenetictreeestablishedwithdifferencein28SrDNAsequenceofD2regionrevealedthatthespecimensofeachgroupidentifiedbymorphologicalcharacterswerealsogroupedtogether.Thegeneticdistancesofintra-species,inter-speciesandinter-genuswerenotoverlapped.Geneticdivergenceof28SrDNAwasalsousefulforidentifyingTomicusspecies.

简介：现在的调查被执行决定通过最佳索引因素(OIF)选择的特征是否能作为与一起考虑的所有特征相比象二不同的年的叠的图象一样在单个年的卫星图象上提供各种各样的范畴的改进分类精确性。进一步，以便决定是否在那里发生有特征的OIF价值的相应增加的不同范畴的分类精确性的增加从两个提取了单个年并且叠了图象，我们与特征的不同联合的OIF价值执行了在各种各样的范畴的制片人精确性(PA)之间的线性回归。调查证明那在那里发生在二不可渗透的范畴viz的PA的重要改进。中等布满建筑物、低密度布满建筑物从作为与所有乐队相比与最高的OIF值联系的乐队和主要部件和为两个的主要部件的分类坚定单个年和叠的图象分别地。回归分析为决定单个年并且叠了分别地意味着与OIF价值的相应增加的在信息内容的增加之间的直接关系的流行的图象的各种各样的范畴展出了在回归系数和OIF价值之间的积极趋势。研究证明特征提取了通过从单个年和叠的图象的OIF能够作为与一起分享的所有特征相比提供显著地改进的PA。

简介：以中文Ｗｉｎｄｏｗｓ３．１为系统运行环境，以ＷＩＮＧＩＳ为基础，用ＭｉｃｒｏｓｏｆｔＶｉｓｕａｌＢａｓｉｃ４０作为开发工具，建立了荒溪分类和危险区制图模型及其信息系统．该系统由文件管理子系统、属性数据管理子系统、图形数据管理子系统、应用模型子系统等构成．应用结果验证了系统模型的各项功能，表明系统设计合理，运行稳定、安全．

简介：Remotesensingimagesshowaverypromisingperspectivefordistinguishingtreespecies,especiallythosewiththeveryhighresolutionrangingfrom1to4m.However,thetraditionalmethodologyforclassifyinglandcovertypes,solelydependingonspectralfeatures,whiletextureandotherspatialinformationareneglected,hastheweaknesssuchasinadequatelyutilizationofinformation,lowaccuraciesofclassification,etc.Consideringtothetexturedifferencesamongforestspecies,itismoreimportantforspatialinformationdescriptionofhigh-resolutionremotesensingimagetoimprovetheprecisionoftexturalfeatureschoosing.Inthisstudy,thefactorstoinfluencetheninetexturalfeatureschoosingwereanalyzedandtheresultsshowedthatthemovingwindowsizewasthemainfactortoaffecttheobtainingprocessesoftexturalfeaturesbasedonthegraylevelco-occurrencematrix(GLCM)method,andtheimagerywasthenclassifiedcombiningthemaximumlikelihoodclassification(MLC)methodwiththeoriginalspectralvaluesandtexturefeatures.First,thisstudyutilizedacorrelationanalysisoftheimagesfromaprincipalcomponentanalysis.Second,throughmultipleinformationsources,includingtextualfeaturesderivedfromthedata.Forthehigh-resolutionremotesensingimage,themostpropermovingwindowsizewasdeterminedfrom3×3to31×31.Classificationofthemajortreespeciesthroughoutthestudyarea(theSunYat-SenMausoleuminNanjing)wasundertakenusingtheMLC.Third,toaidforestresearch,classificationaccuracywasimprovedusingtheGLCM.Accordingtocorrelationsamongtexturesandrichnessofthedata,GLCMprovidedthebestwindowsizeandtexturalparameters.Resultsindicatedthatthetexturecharacteristicswereaddinthespectralcharacteristicstoimprovetheprecisionoftheresultsoftheclassification,19×19windowforbestwindow.Thetotalprecisioncanreach66.3226%,Kappacoefficientis0.5840.Eachtreespecieshasgreatlyimprovedaccuraciesoftheclassification.Bythecal

简介：Background:Successionalpaludification,adynamicprocessthatleadstotheformationofpeatlands,isinfluencedbyclimaticfactorsandsitefeaturessuchassurficialdepositsandsoiltexture.Inborealregions,projectedclimatechangeandcorrespondingmodificationsinnaturalfireregimesareexpectedtoinfluencethepaludificationprocessandforestdevelopment.TheobjectiveofthisstudywastoforecastthedevelopmentofborealpaludifiedforestsinnortheasternNorthAmericainrelationtoclimatechangeandmodificationsinthenaturalfireregimefortheperiod2011–2100.Methods:Apaludificationindexwasbuiltusingstatic(e.g.surficialdepositsandsoiltexture)anddynamic(e.g.moistureregimeandsoilorganiclayerthickness)standscalefactorsavailablefromforestmaps.Theindexconsideredtheeffectsofthreetemperatureincreasescenarios(i.e.+1°C,+3°Cand+6°C)andprogressivelydecreasingfirecycle(from300yearsfor2011–2041,to200yearsfor2071–2100)onpeataccumulationrateandsoilorganiclayer(SOL)thicknessatthestandlevel,andpaludificationatthelandscapelevel.Results:Ourindexshowthatinthecontextwhereintheabsenceoffirethelandscapecontinuestopaludify,thenegativeeffectofclimatechangeonpeataccumulationresultedinlittlemodificationtoSOLthicknessatthestandlevel,andnochangeinthepaludificationlevelofthestudyareabetween2011and2100.However,includingdecreasingfirecycletotheindexresultedindeclinesinpaludifiedarea.Overall,theindexpredictsaslighttomoderatedecreaseintheareacoveredbypaludifiedforestsin2100,withslowerratesofpaludification.Conclusions:Slowerpaludificationratesimplygreaterforestproductivityandagreaterpotentialforforestharvest,butalsoagraduallossofopenpaludifiedstands,whichcouldimpactthecarbonbalanceinpaludifiedlandscapes.Nonetheless,asthethickSphagnumlayertypicalofpaludifiedforestsmayprotectsoilorganiclayerfromdroughtanddeepburns,asignificantprop

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简介：Forthepurposeofofforestation,planninganddevelopmentintheThree-NorthRegion,aseriesof6LandsatTMscenesfrom1996to1997wereusedtoclassifyland-useconditionsinthewholeKorqinSandyLandsateasternpartofInnerMongolia,China,withanareaofabout430×306squarekilometers.Lateron,Siteclassiflcationwasmadeandmappedforthe4southernsandycounties.Theannotationsymbolforeachagglomerationofsiteconditioniscomprisedofsixparts:landunit,landusepattern,soi...