Essays about: "Fourier transform"

Showing result 1 - 5 of 203 essays containing the words Fourier transform.

  1. 1. Image Reconstruction Techniques using Kaiser Window in 2D CT Imaging

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE); Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Md Monowarul Islam; Muftadi Ullah Arpon; [2020]
    Keywords : CT Imaging; Parallel-Beam Projection; 2D FFT; Radon Transform; Filters; Window Functions; Kaiser window; Inverse Fourier Transform; FBP.;

    Abstract : The traditional Computed Tomography (CT) is based on the Radon Transform and its inversion. The Radon transform uses parallel beam geometry and its inversion is based on the Fourier slice theorem. READ MORE

  2. 2. Electrolytic Cleaning of Silver Threads -Effects of Electrolytes on the Condition of Silk

    University essay from Göteborgs universitet/Institutionen för kulturvård

    Author : Karin Hindborg; [2019-06-19]
    Keywords : Silver threads; silk; cleaning; reduction; local electrolysis; the Pleco;

    Abstract : Uppsats för avläggande av filosofie kandidatexamen iKulturvård, Konservatorprogrammet15 hpInstitutionen för kulturvårdGöteborgs universitet2019:20.... READ MORE

  3. 3. Gamma Radiation-Induced Synthesis of Cerium Oxide Mesocrystals

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Michel Goy; [2019]
    Keywords : ;

    Abstract : Nanoparticles of cerium dioxide was synthesized by gamma irradiation of aqueous solutions containing CeCl3 and CeBr3. ICP-OES was used to determine the precipitation yield. X-ray powder diffraction and transmission electron microscope were used to characterize the products. READ MORE

  4. 4. Sound propagation modelling with applications to wind turbines

    University essay from KTH/Mekanik

    Author : Julius Fritzell; [2019]
    Keywords : Sound propagation; Wind turbines; Wave equation; Helmholtz equation; Fourier transform; Chebyshev polynomials.;

    Abstract : Wind power is a rapidly increasing resource of electrical power world-wide. With the increasing number of wind turbines installed one major concern is the noise they generate. Sometimes already built wind turbines have to be put down or down-regulated, when certain noise levels are exceeded, resulting in economical and environmental losses. READ MORE

  5. 5. Detecting exoplanets with machine learning : A comparative study between convolutional neural networks and support vector machines

    University essay from Uppsala universitet/Institutionen för teknikvetenskaper; Uppsala universitet/Institutionen för teknikvetenskaper; Uppsala universitet/Institutionen för teknikvetenskaper; Uppsala universitet/Institutionen för teknikvetenskaper

    Author : Jacob Tiensuu; Maja Linderholm; Sofia Dreborg; Fredrik Örn; [2019]
    Keywords : Machine learning; Exoplanet; Support vector machine; Convolution neuralnetwork;

    Abstract : In this project two machine learning methods, Support Vector Machine, SVM, and Convolutional Neural Network, CNN, are studied to determine which method performs best on a labeled data set containing time series of light intensity from extrasolar stars. The main difficulty is that in the data set there are a lot more non exoplanet stars than there are stars with orbiting exoplanets. READ MORE