在前面两篇文章中,我们已经给朋友们介绍了四种经典分形,并且简略地阐述过它们在理论或实践中的应用.或许大家仍会感到它们很遥远,那我们不妨就近来聊聊吧.图1是被称为羊齿草的一种蕨类植物,在江南也俗称“野鸡尾”,因为它的形状确实象山鸡的尾巴.我们用椭圆圈出两部分,如果让? In the previous two articles, we have introduced four classical fractals to our friends and briefly explained their application in theory or practice. Perhaps we will still feel that they are far away. Let’s talk about it. Figure 1 is a kind of fern known as fern grass. It is also commonly known as the “wild pheasant tail” in the south of the Yangtze River because its shape is really like the tail of a pheasant. We use an ellipse to circle two parts.