ECT样条函数是基于典范ECT组在每个节点处由一个关联矩阵按（U[j-1] , U[j] ,A[j]）光滑连接而产生的,这种函数全体构成ECT样条空间.若......

According to the B-spline theory and Boehm algorithm,this paper presents several necessary and sufficient G^1 continuity......