spatial harmonic造句

It is a Fourier-space method so devices and fields are represented as a sum of spatial harmonics.
Truncating the number of spatial harmonics can also slow convergence and techniques like fast Fourier factorization ( FFF ) should be used.
In MRI, both projections and higher spatial harmonics are sampled by applying spatially-varying magnetic fields; no moving parts are necessary to generate an image.
It's difficult to find spatial harmonic in a sentence. 用spatial harmonic造句挺难的