By the discretization of spatialvariable in the equation, a third-order differential system of equations containing periodic time-varying coefficient is derived.
采用微分求积法对方程中的空间变量进行离散，得到仅含有时间变量的三阶周期系数微分方程组。
2
The autonomy (temporal and spatialvariable) expression mode of the system latent function was refined, and the concept of role autonomous decentralized system was defined.
对系统潜在功能的自律(时空可变)表达模式进行提炼，定义角色自律分散系统的概念。
3
Only in the pole axis theory, do the point and the line become the endogenetic variable and they form the two indispensable factors of constructing spatial structure.