简介:Mobileplatformisnowwidelyseenasapromisingmultimediaservicewithafavorableusergroupandmarketprospect.Tostudytheinfluenceofmobileterminalmodelsonthequalityofsceneroaming,aparametersettingplatformofmobileterminalmodelsisestablishedtoselecttheparameterselectionandperformanceindexondifferentmobileplatformsinthispaper.Thistestplatformisestablishedbasedonmodeloptimalityprinciple,analyzingtheperformancecurveofmobileterminalsindifferentscenemodelsandthendeducingtheexternalparameterofmodelestablishment.Simulationresultsprovethattheestablishedtestplatformisabletoanalyzetheparameterandperformancematchinglistofamobileterminalmodel.
简介:Thisarticlepresentsagoodrobustandreal-timesystemschemeofthemobilerobotobstacledetectionandnavigation,whichprincipleofworkisbasedonthefeaturedescriptorSURF.Inthisscheme,firstly,theimageinformationofthemobilerobotpathwascapturedbythebinocularcamera;thenthefeaturepointswereextractedandcorrespondingmatchedusingSURFtothebinocularimagesastheundetectedobstacles;finallyfixedthepositionoftheobjectivebytheparallaxbetweenthematchingpointscombiningwiththebinocularvisioncalibrationmodel.Theoreticalderivationandexperimentalresultsshowthatthisschemeismoreaccurateforthedetectionandnavigationoftheinterestpoints.Ithasfastmatchingspeedandhighaccuracyandlowerror.So,ithascertainpracticaleffectandpopularizingvalueforthemobilerobotreal-timeobstacleavoidanceandnavigation.
简介:Thebuildinginformationmodel/modeling(BIM)technologyiscurrentlyappliedinabroadrangeofapplicationsandresearchforfacilitymanagement,whiletheBIM-basedmobileFMisdifficultowingtovariousfactorsandenvironments.Forexample,themobileapplicationsusuallyrequirefrequentcross-equipmentcompatibility.ThispaperproposesareasonableBIM-basedFMcross-platformframeworkanddevelopsamobileapplicationonthebasisofanexistingBIM-basedFMsystem.ThedevelopedmobileapplicationisappliedinacasestudyofametrostationprojectinGuangzhoutoverifyitseffectivenessinFMpractice.IthelpsmaintenancestaffinviewingBIMs,accessingrelatedinformation,andupdatingmaintenancerecordsinauniqueplatform.ThetestresultsdemonstratethattheproposedBIM-basedcross-platformframeworkmeettheFMapplicationrequirementsandsupportstheextensionofFMfunctions.