distribution series meaning in English

分布数列
分配数列
分配序列

Short - time fourier transform and time - frequency distribution series are applied to time - frequency imaging . time - frequency distribution series based on wavelet transform is discussed . , and a new time - frequency tool : frequency - shear distribution is introduced into radar imaging fields
讨论了基于小波变换的时频分布级数，把一种新的时频分析工具? ?频率-切变分布应用于时频成像。