简介:2.3 VB访问数据库的方法 VB访问数据库的方法很多,而ODBC接口并不是VB访问数据库运行效率最高的方法,因此ADO通过其内部的属性和方法提供统一的数据访问接口方法
简介:<正>1.IntroductionFlaviusArrianusfromNicomediainBithyniaisregardedasaprimeexampleforthesuccessfulblendofRomanandGreekidentityinimperialtimes.Inhiswritings,heproudlypresentshimselfasaRomanofficialandGreekintellectual.1Bothpartsofhispolyvalentidentityservedhimaselementsofhissymboliccapital.2HisRomanpolitical-militarypersonacomplementedhisimageasa
简介:AnelectromagnetdesignsystemisdevelopedusingVisualC++languageandOpenGLtechnologytovisualizeparametric3Dmodel.Thesystemconsistsofprimarydesign,optimizationdesign,dynamicandstaticcharacteristics,andvisualsimulation.Allempiricalparametersandcurvesusedindesignprocessarestoredindatabase.Throughhuman-computerinteractions,anelectromagneticsystemcanbedesignedconvenientlywiththeresultsandcharacteristicscurvesdisplayedingraphicmodel.Usingthissystemcangreatlyshortentheprocessofproductdesign,andtheresultssatisfytechnicalrequirements.
简介:Inaerialrobots’visualnavigation,itisessentialyetverydiffculttodetecttheattitudeandpositionoftherobotsoperatedinrealtime.Byintroducinganewparametricmodel,theproblemcanbereducedfromalmostunmanageabletobepartlysolved,thoughnotfully,aspertherequirement.Inthisparametricapproach,amulti-scaleleastsquaremethodisformulatedfirst.Bypropagatingaswellasimprovingtheparametersdownfromlayertolayeroftheimagepyramid,anewglobalfeaturelinecanthenbedetectedtoparameterizetheattitudeoftherobots.Furthermore,thisapproachpavesthewayforsegmentingtheimageintodistinctparts,whichcanberealizedbydeployingaBayesianclassifieronthepicturecelllevel.ComparisonwiththeHoughtransformbasedmethodintermsofrobustnessandprecisionshowsthatthismulti-scaleleastsquarealgorithmisconsiderablymorerobusttonoises.Somediscussionsarealsogiven.
简介:在VisualFoxPro中,可通过调用Foxtools.fll中的_WOdTop()和_WhnHwnd()两个例程来为AH函数SetWindowRgn()获取窗口句柄,用API函数中的CreateRoundRectRgn(),CreateEllipticRgn()、CreatePolygonRgn()设定显示区域的方法来实现异形表单的制作.
简介:Thetheoreticalframeworkofvisualsimulationinvirtualrealityisdiscussed.Thenewconceptofvisualimagespaceissupposed.Onthebasisofvisualimagespace,invisualperceptivesense,VRisconsideredasaspatialsimulation.Theobjectiveofthespatialsimulationistotransformphysicalspacetovisualimagespace.Last,theprototypesystem,surveying&mappingvirtualReality(SMVR),isdeveloped,andthespacesimulationaboveisrealized.ByuseofSMVR,thereal3Drepresentation,3Dvisualanalysis,virtualplananddesignscanbeimplemented.
简介:我们可以将表单使用的表和视图放在数据环境中,VisualFoxPro在本地和远程视图中也支持字段级和记录级规则,三、改造表单对象性能1.使用数据环境在
简介:Visualfiredetectiontechnologiescandetectfireandalarmwarningsearlierthanconventionalfiredetectors.Thisstudyproposesaneffectivevisualfiredetectionmethodthatcombinesthestatisticalfirecolormodelandsequentialpatternminingtechnologytodetectfireinanimage.Furthermore,theproposedmethodalsosupportsreal-timefiredetectionbyintegratingadaptivebackgroundsubtractiontechnologies.Experimentalresultsshowthattheproposedmethodcaneffectivelydetectfireintestimagesandvideos.ThedetectionaccuracyoftheproposedhybridmethodisbetterthanthatofCelik’smethod.
简介:VisualC#中调用Excel的COM组件 ,要在VisualC#中使用这些非受管代码的COM组件,本文介绍了Excel对象、C#中的受管代码和非受管代码