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单词 Shooting method
释义

Shooting method

中文百科

打靶法

F(s) = w(1;s) − 1.
w(t;s)的轨迹,s = w'(0)等于−7, −8, −10, −36及−40(颜色分别是红、绿、蓝、浅蓝、洋红),(1,1)有绘制一红色的菱形。

打靶法英语:Shooting method)是数值分析中在求解边界值问题时,将解归约为求解数个初值问题的方法。下面的讨论在打靶法的解释中有详细注释。

对于一个二阶常微分方程的边界值问题,该方法表述如下: 令

 y''(t) = f(t, y(t), y'(t)), \quad y(t_0) = y_0, \quad y(t_1) = y_1

为边界值问题。 令 y(t1; a) 代表下列初值问题的一个解

 y''(t) = f(t, y(t), y'(t)), \quad y(t_0) = y_0, \quad y'(t_0) = a

定义函数F(a)为y(t1; a)和给定边界值y1的差

 F(a) = y(t_1; a) - y_1 \,

若边界值问题有解,则F有一个根,而这个根就是y'(t0)的给出边界问题解y(t)的取值。

上述问题的求解可以采用通常的求根方法,例如二分法或者牛顿法。

英语百科

Shooting method 打靶法

The function F(s) = w(1;s) − 1.
Trajectories w(t;s) for s = w'(0) equal to −7, −8, −10, −36, and −40 (red, green, blue, cyan, and magenta, respectively). The point (1,1) is marked with a red diamond.

In numerical analysis, the shooting method is a method for solving a boundary value problem by reducing it to the solution of an initial value problem. The following exposition may be clarified by this illustration of the shooting method.

For a boundary value problem of a second-order ordinary differential equation, the method is stated as follows. Let

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更新时间:2025/6/21 16:50:44