简介:Beginningwiththeanalysisofthebehaviorofnaturalants,thispaperilluminatestheprincipleandmethodthat,byadoptingimagetextureenergyaspheromoneandfindingtheirwayonthetrackofthepheromone,artificialantshavetheabilitytoidentifyandrememberthroughsimilarmeasurementofpheromone.Basedonthequantityofexperiments,thispaperanalyzessomefactorsthatinfluencetheabilityofartificialantsanddrawssomeconclusionsaboutthelawofantperception.
简介:Inthispaperthedevelopmentofthetechnologyofthelaserscanningissummarized.Theprinciplesoflaserrangescanningareintroduced.Basedonthelaserscanningtechnologyandmethods,whichareinvestigatedbytheauthorstosurveydepositvolume,asurveyingsystemisdevelopedandapracticalapplicationisperformed.Itisshownthatthelaser-scanningtechnologyhasobviousadvantagessuchasmeasurementprecision,automationandvisualizationofobserveddataincomparisonwiththetraditionalmethods.Asaresult,laborintensityisrelievedobviouslyandworkefficiencyispromoted.
简介:GeographicalInformationSystem(GIS)iswidelyusedinmanyfields.Withtherapiddevelopmentofcomputernetwork,GISuserscaremoreaboutdatasharinginnetworks.Intraditionalrelationaldatabase,dataconsistencywascontrolledbyconsistencycontrolmechanismwhenadataobjectislockedinasharingmode,othertransactionscanonlyreadit,butcannotupdateit.Thisisappropriateintraditionalrelationaldatabasesthatstoreattributedataandmainlydealwithshorttransactions.Inspatialdatabases,becauseofvastamountofdataandcomplextopologicalrelations,longtransactionaremetfrequently.Ifthetraditionalconsistencycontrolmethodhasbeenusedyet,thesystem'sconcurrencywillbebadlyinfluenced.SotherecomemanynewrequirementsfortheconsistencycontrolinthefieldofGIS.Therearemanyaspectsofdataconsistencyproblemsinspatial databases,suchastheinconsistencybetweenattributeandgeometrydata;theinconsistencyoftopologicalrelationsaftergeometryobjectshasbeenmodified.Inthispaper,othertwocasesofdataconsistencyarediscussedinMulti_userGeographicalInformationSystem. InGIS,therearemanyformsofdata,suchasgeometrydata,attribute,imagedata,andDEMdata.Inthispaper,weonlydiscussspatialgeometrydata.
简介:Throughtheanalysisoftheprinciple,errorsourcesandprecisionoftrigonometricleveling,thispaperpointsoutthekeyproblemsaboutfirstorderlevelingreplacedbytrigonometricleveling;andforthefirsttimeputsforwardthat,insomegivenconditions,itisnotonlyfeasiblebutalsovaluabletoreplacefirstorderlevelingbyprecisetrigonometricleveling,andprovesitbyexperimentationaswell.Thecontentandconclusionofthispaperhaveconsultingsignificanceandpracticablevalueforoursettingdownrelationalcriterionandproductionpractice.
简介:Inthispaper,theauthorsputforwardabriefandpracticalarithmeticforautoextractingterrainlinesfromdigitalterraindataafteranalyzingandcomparingcurrentarithmetics.Thispapergivesanexperimentresultthattheridgeandvalleyextractedbythearithmeticisconsistentwiththeexperimentalterrain.
简介:Dependingonanalyzingtheabuseofequivalentweights,asetofself-containedtheorysystemonrobustestimationbasedonequivalentvariance-covarianceisestablished,whichincludesρfunction,φfunction,equivalentvariance-covariancefunction,influencefunctionandbreakdownpoint.Andanexampleisgiventoverifythattherobustmodelsproposedinthispaperarereliableandcorrect.
简介:WehaveintegratedinformationfromseismicmomenttensorsandGPSvelocitiesinQinghai_Tibetanditsmargins.Belowwesummarizesomepointsfromthisstudy. 1)ThedeformationratesfromseismicmomenttensorsandfromGPSvelocitiesarebasicallyagreedwitheachother. 2)Thetendenciesofdirectionsofseismicandgeodeticprincipalstrainrateareresembleexceptforoneortwoblocks,however,themagnitudesofaveragestrainratefromseismicmomenttensorsaremuchlargerthanthatfromGPSvelocitiesexceptformiddleTibetblock. 3)Accordingtotheopinionthatstrainenergywillbereleasedthroughearthquake,itisviableforanalyzingearthquakepotentialbycomparinggeodeticstrainratewithseismicstrainrate.Thereisearthquakepotential(>M5)inmiddleTibetinafewyears.Acknowledgment WethankDr.WangQiprovidingGPSvelocitiesinTibetanditsmargins.
简介:CombiningthedenseGPSandgravityobservationdatainSichuan-Yunnanarea,wheretherearetherelativelycompleteactivetectoniczonesandseismicdata,thispaperappliesthegeodesyandgeophysicalinversiontechniqueandtheadvancednumericalsimulationtothesynthesisstudyofgeodesyinversiontofindthedynamicprocessoftectonicmovementanddeformationintheareaandfinallytoinvestigatethekinematicscharacteristicofthegeologicalstructureofdifferentlayeranddifferentscale.Thispaperdiscussesthekinematics,dynamicsmodelaboutthecrustalmovementofactiveblocksinSichuan-Yunnanareaanditsadjacentareas.