该资料介绍了包括Signals and Systems，Fourier Transforms，Sine and Cosine Transforms，The Hartley Transform，Laplace Transforms，The Z-Transform，Hilbert Transforms，Radon and Abel Transforms，The Hankel Transform，Wavelet Transform等在内的十多种变换，数学推导清晰，适合电子电器行业的研究人员学习。(This document introduces more than ten kinds of transformations including signals and systems, Fourier transforms, sine and cosine transforms, the Hartley transform, Laplace transforms, the z-transform, Hilbert transforms, radon and Abel transforms, the Hankel transform, wavelet transform, etc. the mathematical derivation is clear and suitable for researchers in the electronic and electrical industry.)