The two components have identical vertical structure and physical process. The global spectral model component uses spherical harmonics as horizontal basis functions.
这两部分采用相同的垂直结构和物理过程，都用球谐函数作为水平基本函数。
Two-component model for the distribution of galaxies and their systems, a self-similar distribution with a fractional structure and a random distribution, has been discussed.
本文讨论了星系及其系统的两种分布：具有分数维几何性质的自相似分布和无规则分布；
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