Sökning: "degradation mechanism"

Visar resultat 1 - 5 av 70 uppsatser innehållade orden degradation mechanism.

  1. 1. Ageing process analysis of solar panels in graveyard geostationaryorbit for reusability potential

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Robin Drevet; [2024]
    Nyckelord :space debris; Spacecraft Materials; satellite; Space Sustainability; Space Circularity; Space Manufacturing;

    Sammanfattning : The constant growth of space debris and the associated risks force the space community to find solutions to mitigate them. Today the most advanced solutions to dispose of satellites and rocket stages after the end of mission consists of moving them either into a graveyard orbit or towards an atmospheric re-entry ending in the demise of both spacecraft and its materials. LÄS MER

  3. 2. Ligand-stimulated cleavage of PDGFR-beta

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Agni Karolina Tsiatsiou; [2023]
    Nyckelord :;

    Sammanfattning : Platelet-derived growth factor receptors (α and β) are included in the family of receptor tyrosine kinases (RTKs). The dimeric PDGF ligands bind to the PDGF receptors and this results in receptor dimerization, autophosphorylation, and thus activation. The autophosphorylated receptor dimer activates numerous signaling pathways. LÄS MER

  4. 3. Remaining Useful Life Prediction of Power Electronic Devices Using Recurrent Neural Networks

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

    Författare :Congrui Cai; [2023]
    Nyckelord :Power electronics; Prognostics and health management; Remaining useful life; Recurrent neural network; Kraftelektronik; Prognostik och hälsoledning; Återstående livslängd; Återkommande neurala nätverk;

    Sammanfattning : The growing demand for sustainable technology has led to an increased application of power electronics. As these devices are often exposed to harsh conditions, their reliability is a primary concern for both manufacturers and users. LÄS MER

  5. 4. Design changes to simplify maintenance and condition assessment on a tap changer

    Master-uppsats, Jönköping University/JTH, Industriell produktutveckling, produktion och design

    Författare :Arvid Fermér; Jakob Modling; [2023]
    Nyckelord :Power transformer; Chemical degradation; Electrical insulation; Tap changer; Insulation Electrical; Transformer insulation; Insulating oil; Insulation condition assessment; Transformer; Power grids; Power distribution; Oil filled transformer; Transformer oil;

    Sammanfattning : This master thesis investigates a redesign for a maintenance tube, used for both sampling and draining transformer oil from a tap changer compartment. With the current design, one can do one or the other of sampling and draining. LÄS MER

  7. 5. Energy Sustainable Reinforcement Learning-based Adaptive Duty-Cycling in Wireless Sensor Networks-based Internet of Things Networks

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Nadia Charef; [2023]
    Nyckelord :Reinforcement Learning; Q-learning; Dynamic Energy Management; Energy Sustainabiltiy; IEEE802.15.4 MAC Protocol; Adaptive Duty Cycling; Wireless Sensors Networks; Internet of Things;

    Sammanfattning : The Internet of Things (IoT) is widely adopted across various fields due to its flexibility and low cost. Energy-harvesting Wireless Sensor Networks (WSNs) are becoming a building block of many IoT applications and provide a perpetual source of energy to power energy-constrained IoT devices. LÄS MER