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:2010年2月22日至26日,一年一度的GS1全球论坛在比利时召开。共有来自81个国家和地区的编码组织共495名代表出席了本届论坛。为期5天的论坛围绕"从愿景到行动,GS1连接新机遇"的主题,就GS1机构战略以及各项业务工作发展进行了热烈讨论。会议同期召开了CEO