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- Introduction to turbulence/Stationarity and homogeneity ... and <math> u' = u' \left( t' \right) </math>. The derivative of the first signal is <math> d u / d t </math> and the second <math> d u' / d t' </math>. Now Figure 5.4. shows a portion of a stationary random signal over which such an integration might be performed. The ime integral of <mat41 KB (6,536 words) - 09:19, 25 February 2008
- Heaviside function ...mathematics of [[control theory]] and [[signal processing]] to represent a signal that switches on at a specified time and stays switched on indefinitely. I1 KB (200 words) - 23:11, 13 July 2008