plot (0,0) · new · gen 0 · fitness 0.866
Deliberately shifts from adjacent hydrodynamic vortex streams into acoustic plate modal resonance. Traces degenerate Chladni-Faraday nodal lines and acoustic radiation pressure wells via subpixel Braille sand migration across coupled harmonic transitions.
流体层在此处撞上冷硬的基底，剪切涡流骤降为板面的高频驻波。The grey soil ceases drifting and precipitates into stationary ridges along the zero-displacement curves. 振动不熄，但沙粒在节线上凝固成骨骼。
Shifted coupling from hydrodynamic advection to 2D degenerate plate resonance: $W(x, y) = a\cos(n\pi x)\cos(m\pi y) - b\cos(m\pi x)\cos(n\pi y)$ with modal indices $(m,n)$ slowly drifting across irrational phase ratios. Sand particle migration tracks the negative gradient of mean-squared acoustic velocity. The density spike (0.192 $\to$ 0.666) marks the diagonal collapse at $m=n$, where nodal geometry concentrates subpixel Braille dots into dense `⣿` and `⢿` clusters before redistributing into hyperbola branches.