Search for dissertations about: "FFT spectra"

Found 4 swedish dissertations containing the words FFT spectra.

  2. 1. Chemometric and signal processing methods for real time monitoring and modeling : applications in the pulp and paper industry

    Author : Anders Björk; Lars-Göran Danielsson; Guy Dumont; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Acoustic; Vibration; Multivariate; Chemometrics; PLS; OSC; PCA; FFT; Wavelets; WT-MRS; CWT-FLE; Pulp Quality; CSF; Brightness; Tensile Strength properties; Optical Properties; Measurement Technology; On-line; Non-invasive; Process Control; Process Analysis; Process Analytical Technology; PAT.; Akustik; Vibrationer; Multivariat; Kemometri; PLS; OSC; PCA; FFT; Wavelets; WT-MRS; CWT-FLE; Massakvalitet; CSF; Ljushet; Dragstyrkeegenskaper; Optiska egenskaper; Mätteknik; On-line; Icke berörande mätning; Processtyrning; Processanalys; Processanalytisk Teknologi; PAT.; Analytical chemistry; Analytisk kemi;

    Abstract : In the production of paper, the quality of the pulp is an important factor both for the productivity and for the final quality. Reliable real-time measurements of pulp quality are therefore needed. READ MORE

  4. 2. Classical molecular dynamics simulations of collision-induced absorption : method development and evaluation

    Author : Wissam Fakhardji; Magnus Gustafsson; Javier Martin-Torres; Jean-Michel Hartmann; Luleå tekniska universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Applied Physics; Tillämpad fysik;

    Abstract : In this thesis collision-induced absorption (CIA) coefficients are computed using molec-ular dynamics (MD) simulations. Part I is dedicated to the theoretical frame of the method, from the classical theory radiation to the derivation of an absorption coefficient. READ MORE

  5. 3. Arbitrary Waveform Impedance Spectroscopy for Characterization and Diagnostics of High Voltage Insulation

    Author : Björn Sonerud; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; insulation testing; aging; monitoring; discrete Fourier transforms; Dielectric measurements; dielectric materials;

    Abstract : In high voltage engineering the dielectric response technique is a widely used tool both for characterization of insulation materials and for diagnostics of components such as transformers and cables. Currently available techniques are not capable of measuring on-line which would be advantageous; when characterizing a material and evaluating the effect of different voltage magnitudes, waveforms and temperatures it is desirable to be able to observe the continuous development of the dielectric properties. READ MORE

  6. 4. Experimental and multivariate analysis methods for sound quality evaluation of diesel engines

    Author : Örjan Johansson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

    Abstract : Noise control and sound quality analysis are important, since noise has been registered to be a predominant factor in stress and a source of great annoyance. Traffic noise is a problem and a major part of this noise comes from heavy vehicles. READ MORE