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In physics, slowly varying envelope approximation (SVEA, sometimes also called slowly varying asymmetric approximation or SVAA) is the assumption that the envelope of a forward-travelling wave pulse varies slowly in time and space compared to a period or wavelength. This requires the spectrum of the signal to be narrow-banded—hence it is also referred to as the narrow-band approximation. The slowly varying envelope approximation is often used because the resulting equations are in many cases easier to solve than the original equations, reducing the order of—all or some of—the highest-order partial derivatives. But the validity of the assumptions which are made need to be justified.
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Albums by SVEASort:By AlbumA - Z
Unknown Album
Song | Duration |
---|---|
Numb | 2:29 |
All My Exes | 3:33 |
Give & Take | 3:01 |
Need to Know | 3:12 |
Complicated | 3:06 |
Complicated [(Faustix Remix)] | 2:27 |
Don't Stop The Music | |
Body Talk | 2:19 |
Stupid Dumb | 3:16 |
The Ick | 2:39 |
Feels Like Christmas | 3:35 |
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