首先建立了脉动风荷载的功率谱密度函数矩阵。
The matrix of power spectral density function of fluctuating wind load is established first.
在小功率领域，如对调速精度、转矩脉动要求不高的洗衣机、电动自行车等，开关磁阻电机具有较强的应用优势。
There is predominance in some low power applications such as the washer and the electrical bike in which the timing precision and the torque ripple are not strictly concerned.
得出了各地震台台基的脉动噪声的均方根值、观测动态范围、地噪声功率谱。
The article calculates the mean square root values of pulse noise, observational dynamic range and power spectrum of ground noise of all seismic station bases.
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