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词汇 Effective value
分类 英语词汇 英语翻译词典
释义

Effective value

原声例句
冷知识百科大全

These points each tend to have an effective value of between one and two cents.

每个点的有效价值往往在 1 到 2 美分之间。

Crash Course Physics 速成课物理

So, in order to express current in this equation, we need a new variable that represents this effective value.

所以,为了在这个方程中表达电流,我们需要一个新的变量来表示这个有效值。

中文百科

平方平均数 Root mean square

(重定向自Effective value)

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Effective value)
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.

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