学科分类
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35 个结果
  • 简介:Numerousandspecializedwordsaremainobstaclesinimmersionbilingualteachingofengineeringgraphics.Afeasiblesolutiontothisproblemisgivenbyclassifyingnewwordsintothreecategories.Thefearofnewwordsamongstudentsisovercomeandtheeffectofbilingualteachingisgreatlyimproved.

  • 标签: 双语教学 工程制图 浸入式 图解 专业词汇
  • 简介:Distinguishingwithtraditionaltoothprofileofspiralbevelandhypoidgear,itproposedanewtoothprofilenamelythesphericalinvolute.Firstly,anewtheoryofformingthesphericalinvolutetoothprofilewasproposed.Then,thistheorywasappliedtocompleteparametricderivationofeachpartofitstoothprofile.Forenhancingtheprecision,theSWEEPmethodusedforformationofeachpartoftoothsurfaceandG1stitchingschemaforobtainingaunifiedtoothsurfaceareputforwardandmadetheapplicationintheaccuratemodeling.Lastly,owingtothehigheraccuracyoftoothsurfaceofoutputtedmodel,itgavesomeoptimizationapproaches.Givennumericalexampleaboutthemodelcanshowthatthisdesignedgearwithsphericalinvolutetoothprofilecanachievefastandaccurateparametricmodelingandprovideafoundationfortoothcontactanalysis(TCA)indigitizeddesignandmanufacture.更多还原

  • 标签: 螺旋锥齿轮 渐开线齿形 精确建模 齿面接触分析 渐开线齿廓 数字化设计
  • 简介:Anewmethodforpoint-polygonclassificationispresentedinthepaper.Thebasicideaofthemethodisfirstadvancedandthentwopropertiesofpolygonareintroduced.Thecriterionsforpoint-polygonclassificationaregivenexplicitly.Theanalysisshowsthatthepossessesperfectfunction,extensivesuitabilityandhighefficiency.

  • 标签: point-polygon CLASSIFICATION directional POLYGON
  • 简介:Anew3Dsurfacecontouringandrangingsystembasedondigitalfringeprojectionandphaseshiftingtechniqueispresented.Usingthephase-shifttechnique,pointscloudwithhighspatialresolutionandlimitedaccuracycanbegenerated.Stereo-pairimagesobtainedfromtwocamerascanbeusedtocompute3Dworldcoordinatesofapointusingtraditionalactivetriangulationapproach,yetthecameracalibrationiscrucial.Neuralnetworkisawell-knownapproachtoapproximateanonlinearsystemwithoutanexplicitphysicalmodel,inthisworkitisusedtotrainthestereovisionapplicationsystemtocalculating3Dworldcoordinatessuchthatthecameracalibrationcanbebypassed.Thetrainingsetforneuralnetworkconsistsofavarietyofstereo-pairimagesandthecorresponding3Dworldcoordinates.Thepictureelementscorrespondenceproblemissolvedbyusingprojectedcolor-codedfringeswithdifferentorientations.Colorimbalanceiscompletelyeliminatedbythenewcolor-codedmethod.Oncethehighaccuracycorrespondenceof2Dimageswith3Dpointsisacquired,highprecision3Dpointscloudcanberecognizedbythewelltrainednet.Theobviousadvantageofthisapproachisthathighspatialresolutioncanbeobtainedbythephase-shiftingtechniqueandhighaccuracy3Dobjectpointcoordinatesareachievedbythewelltrainednetwhichisindependentofthecameramodelworksforanytypeofcamera.Someexperimentsverifiedtheperformanceofthemethod.

  • 标签: 3D shape measurement color-coded FRINGE NEURAL