简介:UE-Bézier(unifiedandextendedBézier)basisistheunifiedformofBézier-likebases,includingpolynomialBézierbasis,trigonometricpolynomialandhyperbolicpolynomialBézierbasis.SimilartotheoriginalBézier-likebases,UE-Bézierbasisfunctionsarenotorthogonal.Inthispaper,agroupoforthogonalbasisisconstructedbasedonUE-Bézierbasis.ThetransformationmatricesbetweenUE-Bézierbasisandtheproposedorthogonalbasisarealsosolved.
简介:Inthispaper,thesmoothconnectionbetweentwoB-splinesurfacesisdiscussed.First,abriefproofofsomesimplesufficientconditionsofG~0andG~1continuityisgiven.Onthisbasis,anovelmethodforG~0orG~1connectionbetweentwoadjacentB-splinesurfacesispresented.Areparameterizationstepisfirstlytakenforoneofthesurfacessuchthattheyhavethesameparameterizationinvdirection,then,adjusttheirboundarycontrolverticestomakethemG~0orG~1connected.TheG~1connectionparameterisdeterminedbyanoptimizationproblem.Comparedwiththeexistedmethods,ourmethodissimpleandeasytobeusedinpractice.
简介:从今年的深圳安博会来看,智能家居俨然已成为各大企业的新宠。除了霍尼韦尔、索尼等国际巨头聚焦智能家居,以海尔、TCL为代表的将产品线从家电领域延伸到安防领域的“新晋”安防企业,也在积极谋划智能家居发展版图。智能家屠在欧美发展已有近30年历史,市场相对比较成熟。我国智能家居市场容量巨大,目前无论是商业模式还是销售渠道,尚处于摸索阶段。再加上产品大多主要面向中高端用户。而最终要想在智能家居市场有所作为,除了金字塔顶端用户,还需不断往下延伸,慢慢渗透到普通用户市场。换言之,未来还有很长的一段路要走,但如何走,还需要不断借鉴优秀经验。从台湾智能家屠发展来看,现阶段发展态势如何?有哪些值得借鉴的经验?本文或将给出一些答案。