The dispersion process in heterogeneous porous media is distance dependent, which result from the multi scaling property of heterogeneous structure.
非均匀介质中的弥散过程是依赖距离的，这起源于非均质结构的多尺度性质。
2
Becouse multimode fiber has high modal dispersion which limits to its bandwidth distance product, the band pass characteristics of the multimode fiber was analyzed.
多模光纤存在严重的模式色散，其带宽距离积受限。为此，分析了多模光纤的带通特性。
3
But for the influence of self phase modulation, the ISI limited distance of positive dispersion is much longer than that of negative dispersion.