first harmonic

英 [fɜːst hɑːˈmɒnɪk]

美 [fɜːrst hɑːrˈmɑːnɪk]

一次谐波；基（谐）波

电力

英英释义

noun

• the lowest tone of a harmonic series
  Synonym:fundamentalfundamental frequency

双语例句

• 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。
• More convenient using of fast Fourier transform to get the first harmonic of the mathematical model, and the error is relatively large.
  利用快速傅立叶变换比较方便得到一次谐波的数学模型，而且误差比较大。
• The first harmonic measurement is achieved using analog filters, because the error is too large, real bad, harmonic measurement process is no longer the preferred method.
  最早的谐波测量是采用模拟滤波器实现的，由于误差太大，实时性太差，谐波测量过程中该方法已不再优先选用。
• 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。
• 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
• 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。
• 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 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。
• Thus a smaller membrane gives off a higher first harmonic.
  较小的膜发出较高的第一陪音。
• With the first harmonic and its second harmonic the even order harmonics can be obtained.
  并定性解释了其产生机制和谐波效率提高的原因。