For example, PET-7 generates a pulse with a gain of 1 [micro]s and a duration of 256 [micro]s or ZED-meter--a
rectangular pulse duration 1.4 [micro]s.
The system contains an excitation channel, which is able to generate either single
rectangular pulse or more complex rectangular waveform.
At a similar strain rate, the specimen under
rectangular pulse absorbed more energy compared with that under the half-sine stress pulse.
Consider that a 0.95 ns
rectangular pulse centered at 10 GHz is incident on a 20-element linear array with a 25 dB Taylor taper.
Xi, "Damage boundary of a packaging system under
rectangular pulse excitation," Packaging Technology and Science, vol.
Where [DELTA] defines the shift of
rectangular pulse center from the start of revolution.
If we limit the interest case to single
rectangular pulse, one can obtain a detection effect by actually detecting the sharp pulse edges or by spectral decomposition of the pulse itself, when the edges have relatively slow rise and fall times.
Modified Bartlett Lewis
Rectangular Pulse (MBLRP) Model.
Assuming the system was excited by
rectangular pulse, the three-dimensional shock spectrum and the damage boundary surface were obtained by Wang and Chen [24-26].
2): Gaussian pulse A exp(- [(t - [[tau].sub.0]).sup.2]/2[[tau].sup.2.sub.w]), one period of the sinusoid A sin (2[pi]/[[tau].sub.p](t - [[tau].sub.0] + [[tau].sub.p]/2))[[eta](t - [[tau].sub.0] + [[tau].sub.p]/2) - [eta](t - [[tau].sub.0] - [[tau].sub.p]/2)],
rectangular pulse A[[eta](t - [[tau].sub.0] + [[tau].sub.p]/2) - [eta](t - [[tau].sub.0] - [[tau].sub.p]/2)] and Laguerre pulse [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII].