Sökning: "spectral width"
Visar resultat 1 - 5 av 39 avhandlingar innehållade orden spectral width.
1. Wind turbine simulations using spectral elements
Sammanfattning : Understanding the flow around wind turbines is a highly relevant research question due to the increased interest in harvesting energy from renewable sources. This thesis approaches the topic by means of numerical simulations using the actuator line method and the incompressible Navier–Stokes equations in the spectral element code Nek5000. LÄS MER
2. Atmospheric Species and Spectral Radiation in Terrestrial Exoplanets : Implications for Astrobiology
Sammanfattning : The physical properties of the planets and their parent stars are fundamental in the composition of atmospheres and radiative environments, which fundamentally determine their surface temperature and habitability. The atmospheric composition and radiation play a vital role in the emergence of life. LÄS MER
3. Quasi-Single Mode VCSELs for Longer-Reach Optical Interconnects
Sammanfattning : The vertical-cavity surface-emitting laser (VCSEL) is the standard light source in optical interconnects connecting racks in supercomputers and datacenters hosting services such as online data sharing, storage and processing. VCSELs have numerous advantages such as low power consumption, fast direct modulation at low currents, circular output beam for efficient fiber coupling and low-cost fabrication. LÄS MER
4. Pulse-Width Modulated RF Transmitters
Sammanfattning : The market for wireless portable devices has grown signicantly over the recent years.Wireless devices with ever-increased functionality require high rate data transmissionand reduced costs. LÄS MER
5. VCSELs for High-Speed, Long-Reach, and Wavelength-Multiplexed Optical Interconnects
Sammanfattning : The vertical-cavity surface-emitting laser (VCSEL) is the standard light source in short-reach fiber-optic links in datacenters and supercomputers. These systems use an enormous number of links, making cost and energy efficiency pressing issues. LÄS MER