Sökning: "symmetrical communications"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden symmetrical communications.

  1. 1. Far-field pattern synthesis of transmitarray antennas using convex optimization techniques

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Marie Defives; [2022]
    Nyckelord :Applied physics; Transmitarray antennas; convex optimization; Tillämpad fysik; Transmitarray-antenner; konvex optimering;

    Sammanfattning : Transmitarrays antennas (TAs) can be seen as the planar counterpart of optical lenses. They are composed of thin radiating elements (unit cells) which introduce different local phase shifts on an incident electromagnetic wave, emitted by a primary source, and re-radiate it. LÄS MER

  3. 2. Sn-Pb-mixtures for Perovskite Solar Cells

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Fanny Amanda Karolina Baumann; [2020]
    Nyckelord :Perovskite Solar Cells; PSC; Sn; Tin; Lead; Pb; FAPI; Renewable Energy; Compositional Engineering; Interfaces; Morphology; PL; Photoluminescence; Thin film stability; Technology and Engineering;

    Sammanfattning : Perovskite research has quickly gone from non-existent to one of the biggest reseach areas in Photo- voltaics. There are still many questions to be solved regarding the stability, environmental impact, reproducible large area devices, efficiency and module fabrication cost of Perovskite Solar Cells, PSCs, before commercial up-scaling. LÄS MER

  4. 3. Stakeholder dialogues in environmental management

    Master-uppsats, SLU/Dept. of Urban and Rural Development

    Författare :Elin Haapaniemi; [2020]
    Nyckelord :stakeholder dialogue; stakeholder analysis; environmental management system; ISO 14001;

    Sammanfattning : Issues of sustainability are complex and collaborative processes have become an increasingly popular method for confronting them. This is particularly noticeable within corporate environmental management, specifically within the widely adhered to environmental management system ISO 14001:2015 where the stakeholder perspective has been added. LÄS MER

  5. 4. Detection and location of HVDC commutation faults from PMU data

    Master-uppsats, Lunds universitet/Industriell elektroteknik och automation

    Författare :Alejandro Belinchon Calderon; [2018]
    Nyckelord :HVDC-links; HVDC converters; Commutation failures; Phasor measurement units PMUs ; Electric power systems; Wide Area Measurement systems WAMS ; Standard IEEEC 37.118; Single-line to ground faults; Three-Phase faults; Fault detection and location; Nordic 32; DigSilent-PowerFactory; PSCAD; MATLAB-Simulink; Symmetrical components.; Technology and Engineering;

    Sammanfattning : Commutation Failures in LCC HVDC converters is a topic that is normally addressed from the component perspective, looking at converters’ internal signals. How these commutation failures affect the outer AC network is not deeply understood yet. LÄS MER

  7. 5. Den moderna 1800-talsgården : dagens behov i kombination med 1800-talets charm

    Kandidat-uppsats, SLU/Dept. of Landscape Architecture, Planning and Management (from 130101)

    Författare :Helen Strid Bozac; [2018]
    Nyckelord :1800-tal; trädgård; stilideal; Ormanäs; Skåne; gestaltning;

    Sammanfattning : Den moderna 1800-talsgården handlar om en lantgård belägen i Ormanäs, norr om Västra Ringsjön mitt i Skåne. Familjen som bor här vill få en tydlig 1800-talsprägel på sin gård samtidigt som de har behov av att skapa en struktur på utemiljön som fungerar med deras moderna livsstil. LÄS MER