证实关于二阶增量未知元的惯性流形多重网格算法是收敛的。
The IMG algorithm(Inertial Manifold-Multigrid algorithm)including the second-order incremental unknowns is convergent.
由二阶理论建立了梁杆结构分析的精确几何非线性有限元增量平衡方程，并利用精确有限元方法对一些典型结构进行了稳定性分析。
Accurate geometry! Non linear finite element increment equilibrium equation is set up by two orders theory. Typical structure stability is analyzed with this accurate finite element method.
第二款控制器是在使用传统电量增量算法的基础上提出了一种新算法：二阶电导增量比较法。
For the second controller, this paper proposes a new algorithm - two-order incremental Conductance Comparative method, which is based on the use of traditional electricity incremental algorithm.
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