本文运用实际系统向二阶模型逼近的方法，导出了求解调节器参数的矩阵方程，并编制了相应的计算机辅助设计的程序。
In this paper, a matrix equation for solving regulator parameters is derived, based on approximating the practical system to a typical two-order model. Corresponding CAD program is provided.
本文讨论了二阶障碍问题的一个五自由度非协调矩形元逼近。
In this paper, a five-degree nonconforming rectangle element approximation for second order obstacle problem is considered.
本文研究位移障碍下二阶变分不等式问题在各向异性网格上的非协调有限元逼近。
Studied in this paper is the nonconforming finite element approximation to the second order variational obstacle problem with displacement obstacle on the anisotropic meshess.
本文第一部分主要考虑在各向异性网格下用矩形单元对二维空间中二阶椭圆边值问题进行逼近。
Two kinds of rectangular elements are considered to solve the two-dimensional and second-order elliptic boundary value problem on anisotropic meshes.
本文主要考虑在一类各向异性网格(我们称之为gatm)下用一些三角形单元逼近二维空间中二阶椭圆边值问题。
Some triangular elements are considered to solve the two-dimensional and second-order elliptic boundary value problem on a class of anisotropic meshes (we call them GATM).
研究了无穷边界的二阶椭圆问题，探讨了将其转化为一阶系统的最小二乘有限元逼近方法。
A least-squares mixed finite element methods for the first-order system formulation of second-order elliptic problems and a formulation for the infinite boundary conditions are presented.
研究了无穷边界的二阶椭圆问题，探讨了将其转化为一阶系统的最小二乘有限元逼近方法。
A least-squares mixed finite element methods for the first-order system formulation of second-order elliptic problems and a formulation for the infinite boundary conditions are presented.
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