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Fig. 6.

image

Change of fundamental frequency ν3(t) of the chaotic solution specified by Eqs. (26)–(28). The samples of this frequency are computed by applying NAFF algorithm over a sliding time-interval, and the errors are estimated as their respective differences from the frequencies of the quasi-periodic approximation of the solution over the same sliding time interval. Also shown is a Chebyshev appoximation of ν3(t).

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