From this model section, a formula is obtained for calculating the amplitude of relative apparent annual variation of resistivity at a station characterized by two resistivity layers.
从此观点出发，导出以二层电性剖面为特征的台站正常地电阻率相对似年变化幅度公式。
2
The second variationformula of vertical energy functional for a submersion between Riemannian manifolds is calculated with a simple and direct manner.
对于黎曼流形的浸没建立了垂直能量泛函的二阶变分公式，研究强垂直调和映射的稳定性。
3
In this paper we consider second order nonlinear terms, set up more precise dynamic system's model and derive the computation formula of terminal perturbation deviation by state variation.