简介:在地球中的错误方程修理了的IMU(惯性的测量单位)协调第一被介绍。过滤的褪色的Kalman简单地被介绍,它的缺点被分析,然后,适应过滤在IMU/GPS综合航行系统,适应因素被褪色的因素在代替被使用。一个实际例子被给。当在IMU/GPS综合航行系统适用时,结果证明与褪色的因素相结合的适应过滤器有效、可靠。
简介:Theobjectivesofthisstudyaretoassesslandsuitabilityandtopredictthespatialandtemporalchangesinlandusetypes(LUTs)byusingGIS-basedlandusemanagementdecisionsupportsystem.AGISdatabasewithdataonclimate,topography,soilcharacteristic,irrigationcondition,fertilizerapplication,andspecialsocioeconomicactivitieshasbeendevelopedandusedfortheevaluationoflandproductivityfordifferentcropsbyintegratingwithacropgrowthmodel--theerosionproductivityimpactcalculator(EPIC).Internationalfoodpolicysimulationmodel(IFPSIM)isalsoembeddedintoGISforthepredictionsofhowcropdemandsandcropmarketpriceswillchangeunderalternativepolicyscenarios.Aninferenceengine(IE)includinglandusechoicemodelisdevelopedtoillustratelandusechoicebehaviorbasedonlogitmodels,whichallowstoanalyzehowdiversifiedfactorsrangingfromclimatechanges,croppricechangestolandmanagementchangescanaffectthedistributionofagriculturallanduse.Atestforintegratedsimulationistakenineach0.1°by0.1°gridcelltopredictthechangeofagriculturallandusetypesatgloballevel.Globallandusechangesaresimulatedfrom1992to2050.
简介:Accordingtothequalitycontrolneedsoffillingconstructionofthefacerockfilldam,bymeansoftheglobalsatellitepositioningtechnology,thewirelessdatacommunicationtechnology,thecomputertechnologyandthedataprocessingandanalysistechnology,andintegratingwiththerollercompactionmachine,theGPSreal-timesupervisorysystemisdevelopedinthispaper.Itcanbeusedtoreal-timelysupervisetheconstructionqualityoftherollercompactionforfillingengineering.ThecompositionandappliedcharacteristicsofGPSsystem,andthekeytechniqueproblemandsolutionofthedesignarediscussed.TheheightaccuracyofGPSsystemisanalyzedandthepreliminaryapplicationisintroduced.
简介:Weareinvolvedinanembarrassingsituationthatthelimitedcapa-bilityofautomatedfeatureextractionindigitalphotogrammetricsystemscannotsatisfytheincreasingneedsforrapidacquisitionofsemanticinformationforappli-cations.Facingthischallenge,anewtactic,Human-ComputerCollaborative(HCC)tactic,andacorrespondingnewmethod,Operator-ObjectDirected(OOD)method,areproposedforthedesignofasystemforfeatureextractionfromlargescaleaerialimages.Weholdthatinalmostalltechnicalcomplexsys-tems,fullautomationwillbeneithertechnicallyfeasiblenorsociallyacceptable.Thesystemshouldbedesignedtooptimizethroughthecooperativeoperationwithtwoagentsinthesystem:thehumanandthecomputer.
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:Systemdynamics(SD)theoryhaslongbeendeployedinmodelingcomplexnon-linearinterrelationshipsbut,sofarithasnotbeencommontodothekindofmodelinginsupportofbringingenvironmentalsustainabilitypoliciestopractice.Thisislargelybecausethechallengeofincludingspatialdatahasnotyetbeenwellmet.PotentialforadoptionofSDandGISmethodsincombinationisexemplifiedwiththeresultsofadecision-supportexercisedesignedforsimulationandpredictionofthedynamicinter-relationshipsbetweensocio-economicdevelopmentandenvironmentalqualityforthe"Wen,Pi,Du"countyinSichuanprovince,southwesternChina.