Bi-LSTM	Bidirectional Long Short-Term Memory	KF	Kalman Filter
CNN	Convolutional Neural Networks	LSTM	Long Short-Term Memory
CNN-Bi-LSTM	Convolutional Neural Networks -Bidirectional Long Short-Term Memory	MSE	Mean-Square Error
EIF-MSE	Exponential Weighted Mean Square Error with Priority Inner Fitting	OE	Outside Error
EMU	Electric Multiple Units	PE	Peak Error
HP filtering	Hodrick Prescott Filter	RNN	Recurrent Neural Network
INS	Inertial Navigation System