https://www.mathworks.com/help/deeplearning/ug/define-custom-learning-rate-schedule.html
This example shows how to define a time-based decay learning rate schedule and use it to train a neural network.
learning rate schedulematlab simulinkdefinecustom
https://www.mathworks.com/help/deeplearning/ref/piecewiselearnrate.html
A piecewise learning rate schedule object drops the learning rate periodically by multiplying it by a specified factor.
learning rate schedulepiecewisematlab