By studying three dimensional discrete wavelet transform (3d DWT) core algorithm in deepness, the paper divides it into three one dimensional discrete wavelet transforms (1d DWT).

And too, the varied orientation of the facades transform the ensemble into a kind of three-dimensional sun dial that enriches the spatial-temporal perception of the entire complex.

Scattering from three-dimensional cavities is solved using the wavelet-MoM method, while the moment matrix is sparsified with help of the wavelet transform.