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单词 Simpson formula
释义

Simpson formula

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辛普森积分法 Simpson's rule

(重定向自Simpson formula)

辛普森法则(Simpson's rule)是一种数值积分方法,是牛顿-寇次公式的特殊形式,以二次曲线逼近的方式取代矩形或梯形积分公式,以求得定积分的数值近似解。其近似值如下:

 \int_{a}^{b} f(x) \, dx \approx \frac{b-a}{6}\left[f(a) + 4f\left(\frac{a+b}{2}\right)+f(b)\right]

该方法系由英格兰人汤马士·辛普森所创立。

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Simpson's rule 辛普森积分法

(重定向自Simpson formula)
Simpson's rule can be derived by approximating the integrand f (x) (in blue) by the quadratic interpolant P(x) (in red).
An animation showing how Simpson's rule approximation improves with more strips.

In numerical analysis, Simpson's rule is a method for numerical integration, the numerical approximation of definite integrals. Specifically, it is the following approximation:

Simpson's rule also corresponds to the three-point Newton-Cotes quadrature rule.

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更新时间:2025/6/19 2:42:05