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We have determined the dynamical characteristics of the chaotic regimes encountered in two convective instability problems (Rayleigh-Bénard and E.H.D. unipolar ion injection) by studying the reconstructed trajectory in the phase space obtained from experimental data. We show that these trajectories do indeed correspond to attractors, whose fractal dimension low value is clealy evidenced.
Malraison et al. (Sat,) studied this question.