So sánh phương pháp

	Biến đổi Wavelet Thực nghiệm	Phân rã Chế độ Thực nghiệm (EMD)
Lĩnh vực	Chuỗi thời gian	Xử lý tín hiệu
Họ	Process / pipeline	Machine learning
Năm ra đời	2013	1998
Người khởi xướng	Jérémie Gilles	Norden Huang et al.
Loại	Non-stationary signal decomposition	Adaptive data-driven decomposition algorithm
Công trình gốc	Gilles, J. (2013). Empirical wavelet transform. IEEE Transactions on Signal Processing, 61(16), 3999–4010.	Huang, N. E., et al. (1998). The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis. Proceedings of the Royal Society A, 454(1971), 903–995.
Tên gọi khác	EWT, Empirical wavelets	EMD, Intrinsic Mode Decomposition, Adaptive Signal Decomposition, Ampirik Mod Ayrıştırma
Liên quan	3	3
Tóm tắt	The empirical wavelet transform (EWT) is a data-driven wavelet decomposition method that automatically defines wavelet bases adapted to the frequency content of the signal. Introduced by Jérémie Gilles (2013), it overcomes a key limitation of classical wavelets—which use fixed, predefined bases—by constructing custom wavelets from the signal's own spectrum. This adaptive approach is particularly effective for analyzing non-stationary signals with complex, multi-component structures.	Empirical Mode Decomposition (EMD) is a fully data-driven, adaptive method for decomposing nonlinear and non-stationary time series into a finite set of oscillatory components called Intrinsic Mode Functions (IMFs), plus a monotonic residue. Introduced by Norden E. Huang and colleagues at NASA in 1998, EMD requires no predefined basis functions and derives all components directly from the signal itself, making it fundamentally different from Fourier or wavelet transforms.