Sökning: "fast fourier transform"

Visar resultat 11 - 15 av 120 uppsatser innehållade orden fast fourier transform.

  1. 11. Numeriska fouriertransformen och dess användning : En introduktion

    Kandidat-uppsats, Linköpings universitet/Tillämpad matematik; Linköpings universitet/Tekniska fakulteten

    Författare :Kristoffer Tondel; [2022]
    Nyckelord :Fast Fourier Transform; FFT; Discrete Fourier transform; DFT; Scientific Computing; Partial differential equation; PDE; Williamsons Runga-Kutta; Fast Fourier Transform; FFT; Diskreta fouriertransformen; DFT; Beräkningsmatematik; Partiella differential ekvation; PDE; Williamsons Runga-Kutta;

    Sammanfattning : The aim of this bachelor's thesis is to use three variants of the discrete Fourier transform (DFT) and compare their computational cost. The transformation will be used to numerically solve partial differential equations (PDE). In its simplest form, the DFT can be regarded as a matrix multiplication. LÄS MER

  3. 12. A Graphical User Interface for IR-image-based Process Analysis : A tool for assessing root causes in paperboard variability

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för systemteknik

    Författare :Sabina Westergren Ahlin; Agnes Höglund; [2022]
    Nyckelord :paperboard; variability; FFT; Fast Fourier Transform; Fourier transform; app; application; GUI; Graphical User Interface;

    Sammanfattning : Paperboard is produced in a large and complex process where many parameters can affect its quality. The common methods of analysing paperboard quality are through traversing point-like sensors that only measure a very small fraction of the produced paperboard. LÄS MER

  4. 13. 64-point FFT Instruction Implementation and Evaluation on a Microcode Programmable Processor

    Master-uppsats, Linköpings universitet/Institutionen för systemteknik; Linköpings universitet/Tekniska fakulteten

    Författare :Yongjun Liu; Zejun Huang; [2022]
    Nyckelord :FFT; Instruction design;

    Sammanfattning : Fast Fourier Transform is an efficient algorithm for computing the Discrete Fourier Transform (DFT) and one of the most important algorithms used in many digital signal processing applications over decades. This thesis presents an efficient implementation method of a 32-bit complex number 64-point FFT instruction on a micro-programmable processor. LÄS MER

  5. 14. EEG Signal Analysis in the Frequency Domain : An Examination of Abnormalities During the Gait Cycle

    Kandidat-uppsats, KTH/Medicinteknik och hälsosystem

    Författare :Lou Gripentoft; Zilan Isik; [2022]
    Nyckelord :EEG; Frequency Domain; Signal Analysis; Fast Fourier transform; EEG; Frekvensdomän; Signalanalys; Snabb Fourier transform.;

    Sammanfattning : Many people experience discomfort during movement when using a knee prosthesis. As a result, a study is being conducted to see if biomedical models can be used to produce an optimal prosthetic socket to reduce discomfort. LÄS MER

  7. 15. Measuring Respiratory Frequency Using Optronics and Computer Vision

    Master-uppsats, Linköpings universitet/Datorseende

    Författare :Per Antonsson; Jesper Johansson; [2021]
    Nyckelord :Computer Vision; Optical Flow; Motion Vectors; Respiratory Frequency; Signal Processing;

    Sammanfattning : This thesis investigates the development and use of software to measure respiratory frequency on cows using optronics and computer vision. It examines mainly two different strategies of image and signal processing and their performances for different input qualities. LÄS MER