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Fig. 3.
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Examples of original signals (top), and sampled signals at 3 s (second row), 6 s (third row), and 12 s (fourth row). Left panels: True periods and detected periods from sampled signals from top to bottom are 1, 16, 16, and 45 s. Middle panels: 12, 12, 12, and 1455 s. Right panels: 200, 200, 200, and 200 s.
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