1, RibbonFunction is a visual effect, which is usually related to charts, graphic interface design, etc. Band function is a method to present different information in the same visual coordinate system. Through some auxiliary means, such as dotted lines and strip charts, some different data are linked and compared, so that users can understand the data more clearly.

2. Asymptote means that when a point M on a curve is infinitely far from the origin or infinitely close to the discontinuous point on the curve, the distance from M to a straight line approaches zero, and this straight line is called the asymptote of this curve. It can be divided into vertical asymptote, horizontal asymptote and oblique asymptote.