Before deriving the explicit forms of orthonormal DCT and DST matrices we recall their definitions, basic mathematical properties and relations. N is assumed to be an integer power of 2. A subscript in the matrix notation denotes order of the matrix, while a superscript denotes the type. Four ...
In the frequency domain [6,7,8,9], the cover image is first transformed into frequency coefficients via various transform functions, i.e., discrete Fourier transform (DFT), discrete cosine transform (DCT), and discrete wavelet transform (DWT). In 2018, Vo et al. [6] proposed a 2D HS-...
In Section 4, by the simulation experiments, comparison between the DTC and the proposed FADFC strategy illustrates that the steady-state performance can be obviously improved by utilizing the proposed strategy. Finally, Section 5 is the conclusion. 2. Brushless Doubly Fed Machine (BDFM) Model ...
Each device, namely samples 1–6, was fabricated using the same method and configuration. The purpose of measuring all samples is to show the repeatability and consistency of the fabrication process. The similarity between the value of the quality factor and FWHM from each resonance peak of the...