Examinando por Materia "TRANSFORMACIONES (MATEMÁTICAS)"
Mostrando 1 - 3 de 3
Resultados por página
Opciones de ordenación
Ítem Double Fourier analysis for Emotion Identification in Voiced Speech(IOP Publishing, 2016) Sierra-Sosa, D; Bastidas, M; Ortiz P., D.; Quintero, O.L.; Sierra-Sosa, D; Bastidas, M; Ortiz P., D.; Quintero, O.L.; Mathematical Modeling Research Group, GRIMMAT, School of Sciences, Universidad EAFIT, Medellín, Colombia; Universidad EAFIT. Escuela de Ciencias; dsierras@eafit.edu.co; Modelado MatemáticoWe propose a novel analysis alternative, based on two Fourier Transforms for emotion recognition from speech -- Fourier analysis allows for display and synthesizes different signals, in terms of power spectral density distributions -- A spectrogram of the voice signal is obtained performing a short time Fourier Transform with Gaussian windows, this spectrogram portraits frequency related features, such as vocal tract resonances and quasi-periodic excitations during voiced sounds -- Emotions induce such characteristics in speech, which become apparent in spectrogram time-frequency distributions -- Later, the signal time-frequency representation from spectrogram is considered an image, and processed through a 2-dimensional Fourier Transform in order to perform the spatial Fourier analysis from it -- Finally features related with emotions in voiced speech are extracted and presentedÍtem Funciones de Morse minimales en espacios lentes L(p,q), vía la ecuación del calor(Universidad EAFIT, 2014) Yáñez Puentes, Juan Pablo; Cardona Hurtado, Oscar Abel; Cadavid Moreno, Carlos AlbertoÍtem Modelos de elección discreta : revisión y aplicación mediante cuadratura Gaussiana(Universidad EAFIT, 2008) Gómez Cabrera, Douglas; Sánchez Trujillo, Elio Fabio; Zuluaga Díaz, Francisco IvánThis work titled MODELOS DE ELECCION DISCRETA Revision y aplicacion mediante cuadratura gaussiana gathers the characteristic foundations of this models which are useful in Microeconometrics -- Characteristics of Binary Choice and Multinomial Choice Models are described -- Lastly, a practical application about labor dynamic of married women, both, in United States and Colombia using Gaussian Quadrature is presented -- Estimated models are highly significant in their parameters and the procedure of Gaussian Quadrature is stable and reliable