简介:TheCommissionfortheGeologicalMapoftheWorld(CGMW),anIUGSaffiliatedbody,hasjustissuedthefirsteditionoftheStructuralMapoftheIndianOceanwhichwaspresentedduringthe32ndIGC(Florence).Duringthe1980's,theCommissionpublishedtheGeologicalAtlasoftheWorld,whichincludedthemapsofthe5oceansoftheglobe.Twodecadeshaveelapsedandtheknowledgeofthesea-floorexperiencedverysignificantprogress;thereforesome5yearsago,theCommissiondecidedtolaunchanewtypeofoceanmapping.TheStructuralMapoftheIndianOceanisthefirstofthisnewseriesofmaps.
简介:
简介:ThemainpurposetodevelopaMapGraphicWorkstationonthewidelyusedmicro-computeristhatbyitthewholeprocessingofmapdatafromcapturing,managing,editing,updatingtographicoutputtingcanberealized.MapDigitizationSystem(MDS)isthesoftwaresystemtodealwiththeinitialandalsothemostimportantprocessing.Inthispaper,theauthorsintroduceaMDSonamicro-computerbasedMapGrphicWorkstationthathasbeenqualitifiedfortheproducationofdigitalmap.SincethesystemisdesignedtotallyindependentlyandinthegeneralframeoftheMapGraphicWorkstation,thecapturingandman-agingandotherprocessingsformapdataareinanintegralmanner,inwhichtheproducationofdigitalmapcanbefulfilledconveniently.Atthesametime,thesystemisflexibleforfunctionextensionandwidelyapplicabletothedatafromdif-ferentsourcesandwithdifferentinformationcharacterisitcs(e.g.,theprocessingofChinesecharactersonmap).
简介:Ahybridthinningalgorithmforbinarytopographymapsisproposedonthebasisofparallelthinningtemplatesinthispaper.Thealgorithmhasahighprocessingspeedandthestrongabilityofnoiseimmunityandpreservationofconnectivityandskeletonsymmetry.Experimentalresultsshowthatthealgorithmcansolvethethinningproblemofbinarymapseffectively.
简介:KnowledgerepresentationandreasoningisakeyissueoftheKnowledgeGrid.ThispaperproposesaKnowledgeMap(KM)modelforrepresentingandreasoningcausalknowledgeasanoverlayintheKnowledgeGrid.ItextendsFuzzyCognitiveMaps(FCMs)torepresentandreasonnotonlysimplecause-effectrelations,butalsotime-delaycausalrelations,conditionalprobabilisticcausalrelationsandsequentialrelations.ThemathematicalmodelanddynamicbehaviorsofKMarepresented.Experimentsshowthat,undercertainconditions,thedynamicbehaviorsofKMcantranslatebetweendifferentstates.Knowingthiscondition,expertscancontrolormodifytheconstructedKMwhileitsdynamicbehaviorsdonotaccordwiththeirexpectation.SimulationsandapplicationsshowthatKMismorepowerfulandnaturalthanFCMinemulatingrealworld.
简介:TheGeologicalSurveyofNorway,incooperationwiththeGeologicalSurveysof22othercountriesandundertheaegisoftheCommissionfortheGeologicalMapoftheWorld(CGMW),hascompiledageologicalmapofnorthernEuropeatthe1:4millionscale.Forthefirsttimethegeologyofbothlandandseaareasofthislargeregionisdisplayedinasingledocument.Theareacoveredextends
简介:
简介:Acoupledmaplatticeswithconvectivenonlinearityor,forshort,ConvectiveCoupledMap(CCM)isproposedinthispapertosimulatespatiotemporalchaosinfluidflows.ItisfoundthattheparameterregionofspatiotemporalchaoscanbedeterminedbythemaximalLiapunovexponentofitscomplexitytimeseries.Thissimplemodelimpliesasimilarphysicalmechanismforturbulencesuchthattheroutetospatiotemporalchaosinfluidflowscanbeenvisaged.