本文论述线性常系数系统的有限元模型修正中的若干重要问题。

Several important problems for updating finite element model of linear constant coefficient system are demonstrated.

youdao

现代控制理论的状态变量法提供了一种统一、高效的方法来描述具有任意阶次、线性或非线性、时变或常系数的各种系统。

The state variable approach of modern control theory provides a uniform and powerful method of representing systems of arbitrary order, linear or nonlinear, with time-varying or constant coefficients.

youdao

当所有基础方程都能用一组定常参数值来描述，正如熟知的RLC电路的情况，就称该系统是稳态的，或时不变的，或常系数的。

When all elemental equations can be described by a set of constant parameter values, as in the familiar RLC circuit, the system is said to be stationary or time-invariant or constant coefficient.

youdao