The data are frequency settings on an instrument which correlates with the target.

X.std(), X.max(), X.min()
(1110.2270327891836, 8407.1, 3003.7)

The losses I reported previously was with learning rate of 0.001 and epochs=500.  If i increase the epochs to 2000, the loss just go up to inf.  If i decrease the learning rate to 0.0001 and keep the epoch at 500, the loss are still large .  here is the graph:

loss.png .png1088×640 32.8 KB