CNN	Convolutional Neural Network
CBM	Condition-Based Maintenance
GPS	Global Positioning System
HI	Health Index
HIS	Health Index Synthesis
HMM	hidden Markov modelling
IoTs	Internet of Things
PHM	Prognostic and Health Management
RFID	Radio Frequency Identification
RUL	Residual Useful Life
ReLU	Rectified Linear Unit
~	means “to”
HPC	High Performance Computing