ANN	Artificial Neural Network
CFE	Crush force efficiency
CFRP	Carbon fiber-reinforced polymer
DTR	Decision tree regressor
EA	Energy absorption
EN	Elastic nets
HP	Hyperparameters
LAR	Lasso regressor
LR	Linear regressor
MAPE	Mean absolute percentage error
ML	Machine learning
MLP	Multi-layer perceptron
NSGA-II	Non-dominated sorting genetic algorithm II
Pip	Initial peak force
Pm	Mean crushing force
PUF	Polyurethane foam
ReLU	Rectified Linear Unit
RL	Reinforcement learning
RMSE	Root mean squared error
RNN	Recurrent Neural Networks
RR	Ridge regressor
RSS	Residual sum of squares
SEA	Specific absorbed energy
Vf	Fiber volume fraction