Forecasting the Friction Coefficient of Rubbing Zirconia Ceramics by Titanium Alloy

Table 2

The hyperparameter search space of the proposed GRU-DNN model.

Hyperparameters	Value
No. of GRU cells	[4, 8, 16]
No. of FC layers	[1, 2]
No. of FC layers’ units	[4, 8, 16]
Hidden layers activation	(ReLU, linear)
Batch size	[4, 8, 16]
Dropout rate of FC layers	[0.0, 0.1, 0.2]