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
- In fact, the radial composite deviations of master gears do exist and affect the accuracy of measurement results by the first harmonic.
但实际上，标准齿轮的径向综合偏差是存在的，而且以一次谐波的形式传递给被测齿轮，影响其检测结果的准确性。 - And gives the safety evaluation indexes of nodal diameter static frequency of first harmonic system vibration band of blades with round linking. All these have reference value for judging the high frequency vibration of blade system.
给出了整圈连接叶片一阶系统带节径静频率的安全性评价指标，时判断叶片系统的高频振动具有参考价值。 - 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 - 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 first harmonic winding and harmonic winding no-load property curve are gained when field current is change.
通过改变励磁电流的大小，得到了基波绕组和三次谐波绕组的空载特性曲线。 - Even if inspiring frequency is far from frequency of the derived system, first harmonic, super harmonic and combined harmonic resonance may take place respectively in the normal speed range of an actual gear system, because of time-varying mesh stiffness.
即使激励频率远大于派生系统的固有频率，在实际的物理系统中，由于时变啮合刚度的影响，也可能出现主共振、谐共振和组合共振。 - Starting off with vortex tube theory, the relationship between the angular rates and the first harmonic inflow is deduced, and then the generalized model of main rotor dynamic inflow is modified.
本文建立了尾迹弯曲的模型，推导出角速率与一次谐波入流分量之间的关系，据此对旋翼的广义动态入流模型进行了增广和修正； - 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。 - In this paper, the curve-fitting method is used for fitting the measuring signal distinguishes and retains the first harmonic component;
本文应用曲线拟合法对测量信号进行拟合，识别并保留了一次误差运动，正确消除了测量球的偏心，从而得到包含一次误差运动在内完整的误差运动。 - 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。