Sökning: "oscillation"

Visar resultat 21 - 25 av 222 uppsatser innehållade ordet oscillation.

  1. 21. The Impact of Financial Crises and Natural Disasters on the US Catastrophe Bond Market

    Magister-uppsats, Lunds universitet/Nationalekonomiska institutionen

    Författare :Martina Scaroni; Felicitas Gesa Lore Elisabeth Schulze-Steinen; [2022]
    Nyckelord :Catastrophe Bond; Atlantic Hurricanes; Natural Disasters; Financial Crisis; Business and Economics;

    Sammanfattning : Catastrophe (CAT) bonds bring the needs of (re)insurance companies and investors together: They insure against natural disasters by transferring risk to the capital market while at the same time promising high returns and a certain detachment from financial markets. Being an alternative investment class that has been on the rise only in recent years, academic research on CAT bonds is comparatively limited. LÄS MER

  3. 22. Real time estimations of kLa and viscosity in a fermentation pilot plant

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Arvid Norberg; [2022]
    Nyckelord :Oxygen transfer; Viscosity; Fermentation; Biotechnology; Direct method; kLa; OUR; DO; Online monitoring; Soft sensor; Fungus; Fungal fermentation; A. oryzae; A. niger; Herschel-Bulkley; Power law; Shear thinning; Novozymes; Enzymes; Technology and Engineering;

    Sammanfattning : Fermentation is a process that utilizes live microorganisms to produce different biological products such as enzymes. The oxygen mass transfer rate is often the limiting factor in aerobic fermentations and thereby an important process parameter. LÄS MER

  4. 23. Application of harmonic injection method to analyse Sub-Synchronous Control Interactions (SSCI)

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

    Författare :Linus Eriksson; [2022]
    Nyckelord :Sub-synchronous control interaction SSCI ; damping of SSCI; DFIG; PSCAD; Power Oscillation Damper POD ; Harmonic Injection; Subsynkrona kontrollinteraktioner SSCI ; dämpning av SSCI; DFIG; PSCAD; Dämptillsats POD ; Harmonisk Injection;

    Sammanfattning : Wind farms are commonly connected to the main grid through compensated lines which increases the power transfer capability of the line. Double Fed Induction Generator (DFIG) wind turbines in connection to compensated lines can experience Sub-Synchronous Control Interaction (SSCI) which can bring system quantities above allowed levels. LÄS MER

  5. 24. The relation between extreme heat and ENSO and characterization of health risks in relation to varying levels of UTCI

    Master-uppsats, Lunds universitet/Ergonomi och aerosolteknologi

    Författare :Emanuel Svensson; [2022]
    Nyckelord :El Niño; ENSO; relative risk; heat waves; cold spells; UTCI; cardiovascular diseases; exposure; Taiwan.; Technology and Engineering;

    Sammanfattning : As a result of climate change, temperatures have been steadily increasing in the last half century and extreme weather events such as storms, extreme heat, extreme precipitation and cold spells have been observed to occur more frequently. This comes with potential consequences for lives and health. LÄS MER

  7. 25. Heterogeneous catalytic reactions studied with transient gas supply and event-averaged ambient pressure x-ray photoelectron spectroscopy

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/NanoLund: Centre for Nanoscience

    Författare :Qianhui Liu; [2022]
    Nyckelord :Ambient pressure x-ray photoelectron spectroscopy; Event-averaging; Pd 100 surface structure oscillation; Physics and Astronomy;

    Sammanfattning : CO oxidation over Pd(100) is studied with ambient pressure x-ray photoelectron spectroscopy (APXPS). Cyclic gas composition pulsing of the CO:O2 ratio, combined with a new method using software based event-averaging by image recognition over many pulses, is used to improve the signal-to-noise ratio substantially. LÄS MER