...要：为了能够为各类电能扰动事件的本质研究和有效治理 提供准确、可靠的依据，提出基于时频原子变换(time frequency transform，TFT)和改进型自组织映射神经网络 (improved self-organizing map，ISOM)的...
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...要：为了能够为各类电能扰动事件的本质研究和有效治理 提供准确、可靠的依据，提出基于时频原子变换(time frequency transform，TFT)和改进型自组织映射神经网络 (improved self-organizing map，ISOM)的...
基于2个网页-相关网页
SPW time-frequency transform SPW时频变换
time-frequency transform domain 时频变换域
bilinear time-frequency transform 双线性时频变换
Adaptive Joint Time-Frequency transform 自适应联合时频变换
high-resolution time-frequency transform 高分辨时频变换
Fast Polynomial Time Frequency Transform 快速多项式时频变换
Wavelet transform involves the two-variate function of frequency and time, which makes it convenient to simultaneously compensate for attenuation of seismic energy in frequency and time domains.
小波变换作为频率和时间的二元函数，使之可以很方便地在频率和时间域中同时进行地震波能量的吸收衰减补偿。
Although the filtering method in frequency domain can solve the time variant filtering problem based on Fourier transform, the method may appear a false anomaly in conjunct part between Windows.
频率域滤波方法虽然可解决时变滤波问题，但这种方法是基于傅里叶变换，在窗口与窗口之间的接合部位会出现假异常。
But compare with FFT, the calculation time needed by the multiple frequency rotate transform is very long, which has influenced its wide application to a certain extent.
但是，与快速傅立叶变换相比，倍频旋转变换理论所需要的计算时间很长，这在一定程度上影响了它的广泛应用。
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