Essays about: "wavelet transformation"

Showing result 1 - 5 of 11 essays containing the words wavelet transformation.

  1. 1. Vibroacoustic Analysis of an OLTC Diverter Switch for Condition Monitoring : Time frequency analysis with Fourier and wavelet transform in combination with multivariate logistic regression for condition monitoring of OLTC diverter switch

    University essay from Uppsala universitet/Avdelningen för systemteknik

    Author : Simon Persson; [2023]
    Keywords : Wavelet transform; CWT; logistic regression; machine learning; ML; vibroacoustic analysis; time frequency analysis; tap changer; diverter switch; power transformer; classification; prediction; condition; vibrations; state prediction; Hitachi Energy;

    Abstract : Vibrations are everywhere around us all the time and we often recognise them as sounds that we can hear and analyse with our brain. In this thesis, data that has been gathered from a diverter switch (DS) in a controlled environment, is analysed. READ MORE

  3. 2. Dealing With Speckle Noise in Deep Neural Network Segmentation of Medical Ultrasound Images

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

    Author : Olmo Daniel; [2022]
    Keywords : Deep Learning; Ultrasound; Speckle Filtering; Medical Image Segmentation; U-Net; Wavelet Transfrom; Djupinlärning; Ultraljud; Specklefiltrering; Medicinsk bildsegmentering; U-Net; Wavelet transformation;

    Abstract : Segmentation of ultrasonic images is a common task in healthcare that requires time and attention from healthcare professionals. Automation of medical image segmentation using deep learning solutions is fast growing field and has been shown to be capable of near human performance. READ MORE

  4. 3. Transfer learning techniques in time series analysis

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Robinson Sablons de Gélis; [2021]
    Keywords : Deep learning; Time series; Transfer learning; Self-supervised learning; Domain adaptation; Djupinlärning; tidsserier; överföringsinlärning; självövervakad inlärning; domänanpassning;

    Abstract : Deep learning works best with vast andd well-distributed data collections. However, collecting and annotating large data sets can be very time-consuming and expensive. Moreover, deep learning is specific to domain knowledge, even with data and computation. E. READ MORE

  5. 4. The Causal Relationships Between ESG and Financial Asset Classes : A multiple investment horizon wavelet approach of the non-linear directionality

    University essay from Linköpings universitet/Nationalekonomi

    Author : Emil Andersson; Mahim Hoque; [2019]
    Keywords : ESG; Non-linear; Granger causality; Wavelet; Return performance; Directionality; Responsible investing; Sustainability; DCC-GARCH; VAR; Climate; Asset class; Investment horizon;

    Abstract : This thesis investigates if Environmental, Social and Governance (ESG) investments can be considered as an independent asset class. As ESG and responsible investing has increased substantially in recent years, responsible investments have entered the portfolios with other asset classes too. READ MORE

  6. 5. Evaluating rain removal image processing solutions for fast and accurate object detection

    University essay from KTH/Mekatronik

    Author : Tugay Köylüoglu; Lukas Hennicks; [2019]
    Keywords : object detection; failure modes; autonomous vehicles; objektigenkänning; felmodell; autonoma fordon;

    Abstract : Autonomous vehicles are an important topic in modern day research, both for the private and public sector. One of the reasons why self-driving cars have not yet reached consumer market is because of levels of uncertainty. This is often tackled with multiple sensors of different kinds which helps gaining robust- ness in the vehicle’s system. READ MORE