Avancerad sökning

Hittade 5 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Radiation Effects on GaN-based HEMTs for RF and Power Electronic Applications

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Wilhelm Holmberg; [2023]
    Nyckelord :High Electron Mobility Transistor; HEMT; Gallium Nitride; GaN; Silicon Carbide; SiC; Proton Radiation; Galliumnitrid; GaN; Kiselkarbid; SiC; Kisel; Si; HEMT; Transistor; Protonstrålning;

    Sammanfattning : GaN-HEMTs (Gallium Nitride-based High Electron Mobility Transistors) have, thanks to the large band gap of GaN, electrical properties that are suitable for applications of high electrical voltages, high currents, and fast switching. The large band gap also gives GaN-HEMTs a high resistance to radiation. LÄS MER

  3. 2. Kombinatorisk Optimering med Pointer Networks och Reinforcement Learning

    Master-uppsats, Linköpings universitet/Artificiell intelligens och integrerade datorsystem

    Författare :Axel Holmberg; Wilhelm Hansson; [2021]
    Nyckelord :Pointer Networks; Reinforcement Learning; Combinatorial Optimization;

    Sammanfattning : Given the complexity and range of combinatorial optimization problems, solving them can be computationally easy or hard. There are many ways to solve them, but all available methods share a problem: they take a long time to run and have to be rerun when new cases are introduced. LÄS MER

  4. 3. Cost-efficient method forlifetime extension ofinterconnectedcomputer-based systems

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Wilhelm Holmberg; [2021]
    Nyckelord :COTS Cost-efficiency Emulator FPGA Lifetime extension Train identification; COTS Emulering FPGA Kostnadseffektivitet Livstidsförlängning Tågidentifiering;

    Sammanfattning : Lifetime and obsolescence of components for computer-based systems poses issues for continued usage and maintenance of the systems. This thesis investigates possible alternatives for lifetime extension of a train identification system used in Stockholm Metro. LÄS MER

  5. 4. Modeling of RF Heating in the JET Tokamak

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Emil Söderman; Wilhelm Holmberg; [2021]
    Nyckelord :fusion; tokamak; ICRH; RF heating; JET;

    Sammanfattning : Fusion reactors need methods to couple externalpower to confined plasmas. Ion cyclotron resonance heating(ICRH) is a method to radiate electromagnetic waves to couplepower to the kinetic motion of gyrating ions in a plasma. In thisreport we study ICRH with regard to the dispersive effects ofthe confined plasma in the JET tokamak. LÄS MER

  7. 5. Adaptive Protection Scheme for Microgrid

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Fredrik Forsell; Wilhelm Holmberg; [2018]
    Nyckelord :;

    Sammanfattning : The environmental issues receive more attention by the day, which results in a greater interest in renewable energy sources and ways of making the delivery and usage of energy more efficient. One solution that has emerged is microgrids, selfsufficient electrical grids containing renewable energy sources and loads. LÄS MER