Driven damped nonlinear oscillator --- strange attractor with broad amplitude visits
Standard analysis sees: rich, high-entropy values; smooth / autocorrelated; long-range memory (persistent); red spectrum (low-frequency / 1-over-f power); low-complexity (predictable, not noise-like); volatility-clustering (bursty). The atlas additionally detects Nonstationarity:adf_pvalue, Multifractal Spectrum:hurst_estimate. It sits beside Hénon-Heiles in the atlas (standard-bank rank 56) — a neighbor conventional features miss.
Chladni:modal_nodal_cascade | -4.3z | bank-miss 1.1σ |
Laplacian:curvature_autocorrelation | +2.0z | bank-miss 1.5σ |









_(centered)/signed_log_z/Duffing_Oscillator.png)
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| Nearest neighbor | Distance | |
|---|---|---|
| Chua's Circuit | 2.35 | |
| Hénon-Heiles | 2.88 | |
| FPUT N=16 | 2.91 | cross-origin |
Catch24 › Catch24:CO_HistogramAMI_even_2_5 | rank 4/307 | 1.4607 |
Catch24 › Catch24:CO_Embed2_Dist_tau_d_expfit_meandiff | rank 5/307 | 30.6658 |
Chladni › Chladni:modal_nodal_cascade | rank 306/307 | -0.5824 |
Hodge–Laplacian › Hodge–Laplacian:curl_div_ratio | rank 5/307 | 5.5737 |
Laplacian › Laplacian:cross_scale_curvature_coherence | rank 5/307 | 0.9986 |
Laplacian › Laplacian:curvature_autocorrelation | rank 5/307 | 0.9986 |
Laplacian › Laplacian:biharmonic_ratio | rank 303/307 | 0.0000 |
Ulam Spiral (Square) › Ulam Spiral (Square):radon_anisotropy | rank 4/307 | 0.0393 |