tha2002-tech/deeponet-ode-data

DeepONet linear ODE data

Synthetic training data for learning the solution operator of the linear first-order ODE

u'(t) = -k · u(t) + f(t),   u(0) = 0,   t ∈ [0, 1]

with a DeepONet. The input is a pair (f, k): f is a random smooth forcing function and k ∈ [0.1, 2] is a damping constant. The target is the exact solution u(t) = ∫₀ᵗ e^{-k (t-s)} f(s) ds.

Code that generates this dataset and trains a DeepONet on it: https://github.com/tha2002-tech/deeponet-ode-demo

Splits

split	rows
train	2000
test	500

Schema

column	type	length	meaning
f_sensors	list	100	f evaluated at 100 equally spaced sensors on [0, 1]
k	float32	1	damping constant, uniform in [0.1, 2.0]
t	list	100	query times (same 100-point grid as the sensors)
u	list	100	exact solution at t

Generation

• f is sampled from a zero-mean Gaussian random field on [0, 1] with an RBF kernel of length scale 0.2 and unit variance, on a 991-point grid.
• u is computed by the variation-of-constants integral with the cumulative trapezoid rule on that grid (error about 1e-6), then subsampled to the 100-point sensor grid.
• Seed 0 for train, seed 0+1 for test.
• Produced by scripts/generate_data.py at commit bf1ebab27e006e973715aa343437793bc2e78cf8 of the repository above. metadata.json in this repo records all parameters.
• Reproducibility: the same seed regenerates these files byte-for-byte on the same numpy/LAPACK build (eigenvector signs are canonicalized, so other builds should agree to floating-point rounding); if not, the regenerated data is equal in distribution. metadata.json records the numpy version and platform used.

Usage

from datasets import load_dataset
import numpy as np

ds = load_dataset("tha2002-tech/deeponet-ode-data")
f = np.array(ds["train"]["f_sensors"], dtype=np.float32)  # (N, 100)
k = np.array(ds["train"]["k"], dtype=np.float32)          # (N,)
u = np.array(ds["train"]["u"], dtype=np.float32)          # (N, 100)

Reference

Lu, L., Jin, P., Pang, G., Zhang, Z., Karniadakis, G. E. (2021). Learning nonlinear operators via DeepONet based on the universal approximation theorem of operators. Nature Machine Intelligence 3, 218–229.