Smooth connection between cubic Bézier curves and quadratic B-spline curves

Using Bezier constructive method of B-spline curves,the connection problem between cubic Bezier curves and quadratic B-spline curves is changed into the connection problem between cubic Bezier curves and quadratic Bezier curves.The G0,G1 and G2 continuity conditions between the cubic Bezier curves and quadratic B-spline curves are discussed in the paper.