网站首页  英汉词典

请输入您要查询的英文单词:

 

单词 Quadratic mean
释义

Quadratic mean

中文百科

平方平均数 Root mean square

(重定向自Quadratic mean)

平方平均数(Quadratic mean),简称方均根(Root Mean Square,缩写为 RMS),是2次方的广义平均数的表达式,也可叫做2次幂平均数。其计算公式是:

M = \sqrt{\sum_{i=1}^n x_i^2 \over n} = \sqrt{x_1^2 + x_2^2 + \cdots + x_n^2 \over n}

在连续函数\begin{smallmatrix}f(x)\end{smallmatrix}的区间\begin{smallmatrix}[a,b]\end{smallmatrix}内,其均方根定义为:

f_{\mathrm{rms}} = \sqrt {{1 \over {b-a}} {\int_{a}^{b} {[f(x)]}^2\, dx}}

英语百科

Root mean square 平方平均数

(重定向自Quadratic mean)
Sine, square, triangle, and sawtooth waveforms
Graph of a sine wave's voltage vs. time (in degrees), showing RMS, peak(PK), and peak-to-peak(PP) voltages

In statistics, the root mean square (abbreviated RMS or rms), also known as the quadratic mean, is defined as the square root of the arithmetic mean of the squares of a set of numbers. RMS can also be defined for a continuously varying function in terms of an integral of the squares of the instantaneous values during a cycle.

随便看

 

英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2024 encnc.com All Rights Reserved
更新时间:2025/6/19 8:44:21