Then you get successively deeper, II through IV, slow, irregular, high amplitudedelta waves, and then once you reach stage IV you start going up again, up through stage III and II.
It is called delta sleep because of the presence of high amplitude, low frequency delta waves that are seen to occur in the EEG.
这个阶段的脑电图以高幅低频的三角形delta波为主,所以被称为Delta睡眠。
3
The results show that unsteady aerodynamic characteristics of a delta wing oscillating in large amplitude pitching roll motion are more complicated than in pitching motion or in roll motion.