关键词: 均匀T-B样条, 升阶, 反求, 拼接

Abstract: The paper presents n-degree uniform T-B-spline basis function and reparametrizes it on the interval[0，1]，which is based on the analysis of T-B-spline basis functions and terminal properties.And the paper gives the expressions that are used to ascend order and to reverse the control points，respectively.Finally the paper presents the G1/C1 conditions of T-B-spline curves.The results have definited geometric meanings that are useful for surface modeling.

Key words: uniform T-B-spline curves, ascend order, reverse, connect