Research Article

A Robust Algorithm for Optimisation and Customisation of Fractal Dimensions of Time Series Modified by Nonlinearly Scaling Their Time Derivatives: Mathematical Theory and Practical Applications

Figure 7

Accuracy of the new amplitude spectrum fractal dimension method (MAFDM; red curves; = 1) compared to Higuchi’s method and the MRBC method, tested with the following continuous nowhere differentiable functions (CNDFs): Knopp/Takagi function (a); Weierstrass cosine function (b); Weierstrass-Mandelbrot function (c); Brownian motion (d).
178476.fig.007a
(a)
178476.fig.007b
(b)
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(c)
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(d)