基于專家知識(shí)對(duì)青藏鐵路gps測(cè)量數(shù)據(jù)的綜合性粗差探測(cè)方法研究畢業(yè)論文外文翻譯

1、外文翻譯（外文文獻(xiàn)）AnintegratederrdetectingmethodbasedonexpertknowledgefGPSdatapointsmeasuredinQinghai–TibetRailwayDewangChenTaoTangFangCaoBaigenCaiAbstractAstherearehugeamountsofGlobalPositioningSystem(GPS)datapointsmeasuredinth

2、eQinghai–TibetRailway(QTR)withalengthof1142kmitwasinevitablethatsomemeasuringerrsexistedduetovarioussituationsinmeasurement.Itisveryimptanttodevelopamethodtoautomaticallydetectthepossibleerrsinalldatapointssoastomodifyth

3、emmeasurethemagaintoimprovethereliabilityofGPSdata.Fourerrpatternsincludingredundantmeasurementsparsemeasurementbackfthmeasurementbiganglechangewereobtainedbasedonexpertknowledge.Basedonthefourerrpatternsfouralgithmswere

4、developedtodetectthecrespondingpossibleerrsindatapoints.Totherepetitiveerrsbydifferentalgithmseffectivelydisplaythepossibleerrsanintegratederrdetectingmethodwasdevelopedbyreasonablyassemblingthefouralgithms.Afterfourperf

5、manceindicesweregiventoevaluatetheperfmanceoftheerrdetectingmethodsixGPStrackdatasetsbetweensevenrailwaystationsintheQTRwereusedtovalidatethemethod.Thirtyeightsegmentsofsomesequentialpointsthatarepossiblywrongwerefoundby

6、themethodfourteenofthemwereconfirmedbymeasurementexperts.Thedetectingrateofthemethodwas100%thedurationtimeofthedetectingprocesswaslessthanhalfanhourcomparedwiththe94hmanualwkload.Thevalidationresultsshowthatthegeneratedf

7、romGPStrackdatapointscanbeeasilyusedintrainpositioning.TogeneratetheDTMwithhighreliabilityGPStrackdatapointswithhighaccuracytheintegritystrictnessinrecdingarerequiredasprerequisite.ThehighaccuracyofGPStrackdatapointswasa

8、chievedbythedifferentialGPS(DGPS)technology(Lee&Rizos2008)intheQTR.Howevertheintegritystrictnessinrecdingmainlydependedonthepatienceearnestofthemeasuringwkers.AstherearehugeamountsofsatellitelocationGPSdatapointsinQTRwit

9、halengthof1142kmitisinevitablethatsomemeasuringerrsmayexistduetovariousreasonsinmeasurement.Thebasicmethodtofindmeasuringerrsfengineersistoobservedatapointssegmentbysegmentwhichisobviouslytimeconsumingeasytomisssomeerrs.

10、Aneffectiveerrdetectingmethodshouldbedevelopedtofindthepossibleerrsautomaticallyquicklytoincreasethereliabilityofthedata.Expertknowledgeplayakeyroleindealingwithspecificproblemsindifferentdomainssuchasinanalyzingdegraded

11、terrain(Genske&Heinrich2009)inearthquakeresistantdesignofreinfcedconcretebuildings(Berrais2005)infrauddetectionincommunicationwks(Hilas2009)etc.Therefeitisreasonabletothinkthatsomerulescanbeconcludedbymeasuringexpertsfro

12、mwhichsomeerrdetectingalgithmscanbedesigned.Aftertheseerrdetectingalgithmsfindthepossibleerrsdisplaythemoperatswillmakeafinaldecisionfromtheirexperienceonwhatarerealerrstoincreasethewkefficiencyensurethecrectnessofthejud

13、gment.Therefeexpertknowledgeisveryimptantfthisissuenotonlyinincreasingefficiencybuyalsoinensuringcrectness.Inthispapersomeerrdetectingalgithmsbasedonexpertknowledgewillbedevelopedintegratedintoanerrdetectingmethodtofindt