first harmonic
英 [fɜːst hɑːˈmɒnɪk]
美 [fɜːrst hɑːrˈmɑːnɪk]
一次谐波；基（谐）波
英英释义
noun
- the lowest tone of a harmonic series
双语例句
- This article first harmonic harm, the causes, such as management standard simply introduces several different, and separately calculated method of harmonic described and compared.
文章首先对谐波的产生原因、危害、管理标准等进行了简单的介绍，并分别对几种不同的谐波计算方法进行了阐述和比较。 - These methods can't be used not only to analyze the non integral order harmonics, but to distinguish the eccentricity and the first harmonic, and contain the lager nonlinear error.
这些方法不能分析非整次谐波，不能区分一次谐波和偏心分量，并且含有较大的非线性误差。 - Because "DGB-2 Type Fast Track Dynamic Power Factor Compensation Device" has detecting circuit of reaching zero, the paper first analysis the harmonic detecting of starting to sample at reaching zero time and realize the upper harmonic detecting.
因为DGB&2型快速跟踪动态功率因数补偿装置具有过零检测电路。论文首先对过零时刻开始采样的谐波检测进行分析，实现了过零时刻开始采样的谐波检测。 - The first order non-simple harmonic coefficient enhances modulus.
第一非简谐系数的存在使弹性模量增大。 - The method uses the DC component and the first harmonic of a curve'S chain code expressed by fourier series to fit the curve, avoiding the inverse calculation of an array used in general methods.
该方法利用闭合曲线的傅立叶级数表示的直流分量和一次分量实现对闭合曲线的椭圆拟合，可以避免通常椭圆拟合方法中的矩阵求逆问题。 - The effect of different topographic scattering targets on the ( ratio) detection was measured and analyzed. The results show that the ratio of second to first harmonic signals can be used in practical application.
文章还就不同地形散射体对探测结果的影响进行了测量和分析，实验结果表明二次谐波与一次谐波信号比值标定技术对便携式二极管激光光学测量能够很好的满足实际应用的需要。 - If the frequency of a laser is modulated sinusoidally, the first harmonic component of saturated absorption signal can be used as error signal to stabilize the frequency of the laser.
对激光器进行频率调制，检测原子分子饱和吸收信号中的一次谐波成分得到频率误差信号，反馈控制可以实现激光频率的稳定。 - Coefficient of determination of average CR and the first harmonic CR in baseline and hyperemia conditions were greater than 0.97 ( P< 0.001).
基础状态和充血状态的平均冠脉阻抗和一次谐波冠脉阻抗的决定系数（r2）均大于0.97（P<0.001）。 - In this paper, firstly, relations of first two harmonic induced velocities to the lower and same-order harmonic circulations are obtained from the generalized classical vortex theory of the rotor.
本文从旋翼的广义经典涡流理论出发，通过环量对诱导速度的贡献的简化处理，推导出旋翼诱导速度的二阶分布。 - Fast Measuring First Harmonic Reactive Power in Power System Based on 8098 Single Chip Processor
基于8098单片机的电网基波无功功率快速测量