File size: 1,973 Bytes
515fb62 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | {
"dataset": "pendulum_cjepa_clevrer_3k",
"seed": 20261014,
"generation_mode": "random within per-regime bounds",
"num_videos": 3000,
"train_videos": 2400,
"val_videos": 600,
"val_design": "out-of-distribution physics regimes (NOT just a held-out seed)",
"val_regimes": {
"train": "in-distribution: theta0=\u00b1(15\u201340)\u00b0, omega0=\u00b10.2 rad/s, gamma=U(0.15,0.50)/s, Earth gravity, linear damping, no forcing (matches jimchen2/pendulum-cjepa-160f)",
"val_high_damp": "OOD physics: gamma=U(0.55,0.90)/s \u2014 much stronger air resistance than any training video (fast envelope decay, tau as low as 2.2 s)",
"val_low_damp": "OOD physics: gamma=U(0.0,0.08)/s \u2014 almost un-damped; swings barely decay, energy nearly conserved",
"val_large_angle": "OOD physics: theta0=\u00b1(45\u201380)\u00b0 \u2014 strongly nonlinear regime; period elongated up to ~30% above small-angle value",
"val_gravity": "OOD physics: g in {1.62 (Moon), 3.71 (Mars), 24.79 (Jupiter)} m/s^2 \u2014 periods shift by up to 2.5x either way",
"val_quad_damping": "OOD physics (new law): drag = -beta*w*|w|, beta=U(0.10,0.35); envelope decays ~linearly instead of exponentially",
"val_driven": "OOD physics (new forcing): periodic torque A*cos(2*pi*f*t+phi), A=U(0.35,1.0) rad/s^2, f=U(0.35,0.65) Hz near the ~0.5 Hz natural frequency \u2014 beats and resonant growth"
},
"frames_per_video": 160,
"duration_s": 13.333333333333334,
"fps": 12,
"image_size": [
196,
196
],
"codec": "H.264",
"pixel_format": "yuv420p",
"audio": false,
"ode": "theta_ddot = -(g/L) sin(theta) - gamma*theta_dot - beta*theta_dot*|theta_dot| + A*cos(2*pi*f_d*t+phi)",
"integrator": "RK4",
"substeps_per_frame": 8,
"gravity_m_s2": "9.81 (train); {1.62, 3.71, 24.79} (val_gravity)",
"length_m": 1.0,
"split_unit": "whole video",
"normalized_labels": false,
"simulated_seconds_for_questions": 28.0,
"questions_per_video_target": 8
} |