有限差分方法（网格法）是最早使用的一种电磁场数

值计算方法。

边值问题

物理思想：场域离散。

（连续区域→网格和节点）

数学基础：差分原理。

（微商→差商）

线性代数方程组

§6-3 有限差分方法

作为数值计算方法，有限差分法将连续场域的问题变换

为离散系统的问题（连续场域划分为若干个细小的区域：网

格和节点）。也就是说通过离散化模型上各离散点的数值解

来逼近连续场域内的真实解。-The finite difference method (grid method) is the earliest use of an electromagnetic field the number of

Value method.

Boundary Value Problems

Physical idea: the field of discrete.

(Contiguous area → grid nodes)

Mathematical foundations: the difference principle.

(The Derivative → difference quotient)

Linear algebraic equations.

§ 6-3 Finite Difference Method

Numerical methods, finite difference method will transform the problem of the continuous field

For discrete systems (continuous field is divided into several small areas: network

Grid nodes). That is, the value of the discrete points in the discrete model solution

To approximate the true solution of the continuous field domain.