ratio n. (pl. ratios) 1.比,比率,比值;比例;系数。 2.【经济学】复本位制中金银的法定比价。 the ratio 3:2 (读作 the ratio of three to two )3对2之比。 arithmetical ratio 公差,算术比。 direct ratio 正比。 inverse [reciprocal] ratio反比。 current ratio 电流比,电流变换系数。 nutritive ratio 营养率。 vt. 1.用比例方式表达;求出…的比值;使…成比例。 2.将(相片)按比例放大或缩小。
Computation method based on fast fourier transformation ( fft ) is studied deeply , whose measurement accuracy is 0 . 2s . the computing indexes involve voltage , current , power , frequency , phase , electric power , the harmonic ratio and the total harmonic distortion ( thd ) of phase voltage and phase current 深入研究了测量精度为0 . 2s级的基于快速傅立叶变换( fft )的电压、电流、功率、频率、相位、电能等电力参数和各相电压电流各次谐波含量、谐波含有率、谐波总畸变率的计算方法。
On the calculation , we can hold the conclusion that the two kinds of compensators have no distinct difference at the technical aspect under circumstances of two - phased compensation . the effect of decreasing negative sequence current and harmonics ratio is indistinct , however , both are effective in increase power factor 通过仿真发现,这两种补偿方案在技术方面的差别不大:两相补偿模式下,在降低负序和滤波方面,效果都不明显;对提高功率因数的作用显著。