Diffusion in fractal media,as an anomalous diffusion,is different from that in Euclidean space. Fractional diffusion equation can describe diffusion process in fractal media more exactly than the normal differential diffusion equation.

• 分形空间中的扩散与欧几里德空间中的扩散不同,为反常扩散,扩散方程不能用普通微分方程准确描述,需用分数微分方程。