Is a Fractal Dimension of 0.65 Possible in Nonlinear Oscillator Systems?

AI Thread Summary
The discussion centers on the calculation of fractal dimensions in nonlinear coupled spring oscillators using a Poincaré map. The user obtained a fractal dimension of approximately 0.65, which raises concerns since typical fractal dimensions range from 1 to 2. They utilized a box counting method but noted limitations due to the resolution of their data points, affecting the number of occupied boxes at smaller sizes. The conversation highlights the importance of self-similarity in structures within each box for accurate fractal dimension calculations. Overall, the user seeks clarification on whether their findings are valid given the unusual fractal dimension result.
Joran
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First post!

I'm investigating chaos in non linear coupled spring oscillators. After generating a poincare' map of said system i wanted to see if the map was fractal. i proceeded to use a box counting method in order to calculate a fractal dimension.

I generated a plot of log(number of occupied boxes) versus log(total boxes) and the slope should be the fractal dimension, i think. However my slope was approximately .65

Is this acceptable? I've only seen fractal dimensions of values between 1 and 2. Which leads me to believe I've done something wrong. any help?

also if i posted in the wrong place i apologize in advance.
 
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should be more than 1. Dont you need to guarantee that the structures in each box are self-similar?
 
I think this is more appropriate for your data:

4ef00bf6711362601423ddefe26b6237.png


where e is the s box size
 
thanks for the reply

i plotted log(1/e) on the x-axis and log(N(e)) on the y-axis, making the slope D

in terms of taking the limit as the box approaches zero: my poincare' map has a limited resolution (number of data points taken) and at small box sizes the total number of occupied boxes will only approach the max number of data points.

my plot of log(1/e) on the x-axis and log(N(e)) on the y-axis shows this because at small box sizes the slope approaches 0.
 

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