ARIMA	Autoregressive Integrated Moving Average
DFT	Discrete Fourier Transform
DHHS	Discrete Hilbert–Huang Spectrum
EMD	Empirical Mode Decomposition
ENTSO-E	European Network of Transmission System Operators for Electricity
FD	Fourier Decomposition
FFT	Fast Fourier Transform
FT	Fourier Transform
HHS	Hilbert–Huang Spectrum
HHT	Hilbert–Huang Transform
HS	Hilbert Spectrum
HT	Hilbert Transform
IMF	Intrinsic Mode Functions
MHHS	Marginal Hilbert–Huang Spectrum
MHLV	Monthly Hourly Load Values
MHS	Marginal Hilbert Spectrum
MWT	Marginal Wavelet Transform
pdf	Probability Density Function
RMSE	Root Mean Square Error
WT	Wavelet Transform