Radicals ( Radical30) two strokes in Kanji;

dimensional, e.g.

1D, one dimension (e.g. to the right);

Chinese Romanization ( cr) ;

www.jisho.org radical number 27 ... ;

directional, e.g.


logical, e.g.

factory; mill; plant; yard;
wild goose;

numerological, e.g.


structural, e.g.

in time based characteristic of frequency, the defined frequency is measured from zero to its amplitude, and then the defined frequency's amplitude behaves staple like horizontal ... , between 2 marked time (e.g. t1, t2), the defined frequency's amplitude a.k.a. bandwidth;