简介:摘要针对现在车库照明系统采用的普通开关方式控制或者使用单独灯具增加传感器来控制灯具的现状,提出了一种基于蓝牙Mesh技术,红外传感器和手机APP设置的一种大型车库智能照明控制系统,通过该系统可以提前照亮汽车可能形式的方向,并在汽车离开后关闭亮灯。本文介绍该系统的结构,运行方式效果,APP设置方式。
简介:Videoobjectextractionisakeytechnologyincontent-basedvideocoding.AnovelvideoobjectextractingalgorithmbytwoDimensional(2-D)mesh-basedmotionanalysisisproposedinthispaper.Firstly,a2-Dmeshfittingtheoriginalframeimageisobtainedviafeaturedetectionalgorithm.Then,higherorderstatisticsmotionanalysisisappliedonthe2-Dmeshrepresentationtogetaninitialmotiondetectionmask.Afterpost-processing,thefinalsegmentingmaskisquicklyobtained.Andhencethevideoobjectiseffectivelyextracted.Experimentalresultsshowthattheproposedalgorithmcombinesthemeritsofmesh-basedsegmentingalgorithmsandpixel-basedsegmentingalgorithms,andherebyachievessatisfactorysubjectiveandobjectiveperformancewhiledramaticallyincreasingthesegmentingspeed.
简介:AnewapproachfortreatingthemeshwithLagrangianschemeoffinitevolumemethodispresented.IthasbeenprovedthatclassicalLagrangianmethodisdifficulttocopewithlargedeformationintrackingmaterialparticlesduetoseveredistortionofcells,andthechangingconnectivityofthemeshseemsespeciallyattractiveforsolvingsuchissues.Themeshwithlargedeformationbasedoncomputationalgeometryisoptimizedbyusingnewmethod.Thispaperdevelopsaprocessingsystemforarbitrarypolygonalunstructuredgrid,theintelligentvariablegridneighborhoodtechnologiesisutilizedtoimprovethequalityofmeshincalculationprocess,andarbitrarypolygonalmeshisusedintheLagrangianfinitevolumescheme.Theperformanceofthenewmethodisdemonstratedthroughseriesofnumericalexamples,andthesimulationcapabilityisefficientlypresentedincopingwiththesystemswithlargedeformations.
简介:Weldabilityofpolyetheretherketone(PEEK)withpolyetherimide(PEI)istested.AndcarbonfiberreinforcedPEEKlaminatesareresistanceweldedusingstainlesssteelmeshheatingelement.Theeffectsoftheweldingtimeandweldingpressureonthelapshearstrengthofjointsareinvestigated.ResultsshowthatPEEKcanhealwithPEIwellinweldingconditionandthelapshearstrengthofPEEK/CF(carbonfibre)jointincreaseslinearlywithweldingtime,butreachesamaximumvaluewhenweldingpressurerangingfrom0.3MPato0.5MPawithconstantweldingtime.ThefracturecharacteristicsofsurfaceareanalyzedbySEMtechniques,andfourtypesoffracturemodesoflapshearjointsaresuggested.
简介:Thisworkintroducesascalableandefficienttopologicalstructurefortetrahedralandhexahedralmeshes.Thedesignofthedatastructureaimsatmaximalflexibilityandhighperformance.Itprovidesahighscalabilitybyusinghierarchicalrepresentationsoftopologicalelements.Theproposeddatastructureisarray-based,anditisacompactrepresentationofthehalf-edgedatastructureforvolumeelementsandhalf-facedatastructureforvolumetricmeshes.Thisguaranteesconstantaccesstimetotheneighborsofthetopologicalelements.Inaddition,anopen-sourceimplementationnamedOpenVolumetricMesh(OVM)oftheproposeddatastructureiswritteninC++usinggenericprogrammingconcepts.
简介:Animprovedself-organizingfeaturemap(SOFM)neuralnetworkispresentedtogeneraterectangularandhexagonallatticwithnormalvectorattachedtoeachvertex.Aftertheneuralnetworkwastrained,thewholescattereddataweredividedintosub-regionswhereclassifiedcorewererepresentedbytheweightvectorsofneuronsattheoutputlayerofneuralnetwork.Theweightvectorsoftheneuronswereusedtoapproximatethedense3-Dscatteredpoints,sothedensescatteredpointscouldbereducedtoareasonablescale,whilethetopologicalfeatureofthewholescatteredpointswereremained.
简介:摘要:本研究探讨了WIFI MESH技术在工业自动化领域的应用及其潜力。首先概述了WIFI MESH的基本原理、网络架构及其与其他无线通信技术的比较。随后,分析了工业自动化领域的通信需求特点以及WIFI MESH在该领域的应用需求、优势与挑战。接着,通过具体案例展示了WIFI MESH在工厂生产线、仓库管理系统和工业物联网中的应用。最后,探讨了WIFI MESH在工业自动化中的性能评估与优化方法,并分析了实际应用案例的优化效果。研究结果表明,WIFI MESH技术为工业自动化领域的无线通信提供了高效、可靠的解决方案。
简介:EPON技术是采用点到多点拓扑结构,利用光纤和光无源器件进行物理层传输、通过以太网协议提供多种业务的宽带接入新技术,本文针对目前广电网大力开展的双向网络改造项目,以EPON+EoC为核心,分别对EPON和EoC的技术原理进行论述,并根据EPON+EoC技术在广电实际工程的应用,对其组网方案及优势进行了分析。