spectral correlation density造句

Then, the spectral correlation density is calculated:
The spectral correlation density applies only to cyclostationary processes because stationary processes do not exhibit spectral correlation.
The "'spectral correlation density "', sometimes also called the "'cyclic spectral density "'or "'spectral correlation function "', is a function that describes the cross-spectral density of all pairs of frequency-shifted versions of a time-series.
It's difficult to find spectral correlation density in a sentence. 用spectral correlation density造句挺难的