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
- 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。 - Phase splitting reactive power compensation of first harmonic in low voltage distribution network by computer controlled thyristor switch
微机控制的晶闸管开关型低压配电网基波无功分相补偿 - Secondly, the principles of the LLC half-bridge resonant converter are presented and the performance of LLC resonant converter is analyzed using FHA ( First Harmonic Approximation) method in detail.
其次介绍了LLC半桥谐振变换器的工作原理，并采用基波分析的方法对电路的特性进行详细分析。 - 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； - 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。 - 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。 - After the nonlinear and absorption effect is taken into account in the applications where high power ultrasonic is involved, the first and second harmonic components of the sound field of stepped circular plate is analyzed, based on the KZK equation and quasi-linear condition.
考虑到大功率超声应用中的非线性和吸收作用，本文从KZK方程和准线性条件出发，对于工作在共振频率下的这种阶梯圆盘，推导了它的一阶和二阶谐波声场计算方法。 - The utility of the ratio of second and first harmonic to eliminate the influent of light source fluctuation was analyzed.
并对利用二次谐波与一次谐波的比值来消除由光源波动引起的影响等做了分析。 - The Duffing Eguation with large damping solved by using first harmonic balance method
基波平衡法求解大阻尼Duffing方程 - 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）。