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Visar resultat 1 - 5 av 15 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Uplink Load in CDMA Cellular Systems

    Författare :Erik Geijer Lundin; Fredrik Gunnarsson; Fredrik Gustafsson; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Code Division Multiple Access;

    Sammanfattning : Cellular mobile systems designed to handle multimedia services are currently being developed. The primary goal for any mobile system is to provide a satisfactory quality of service, both to operators and customers. Providing good quality of service while maintaining system stability requires accurate knowledge of the system load. LÄS MER

  3. 2. Case studies in omniparametric simulation

    Författare :Fredrik Lundin; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; growth model; Ising model; Markov chain; omnithermal simulation; omniparametric simulationpercolatiion; Potts model; parameter estimation; partial observations; random cluster model; Richardson model; simulation driven parameter estimation; two-type Richardson model; omnithermal simulation;

    Sammanfattning : In the eld of particle systems and growths models simulation is an important tool. When explicit calculations are too complex or impossible to perform we may use simulations instead. We adapt a new technique here denoted omniparametric simulation, to the two-type Richardson, Ising and Potts models. LÄS MER

  4. 3. Idiopathic Normal Pressure Hydrocephalus : Aspects on Pathophysiology, Clinical Characteristics and Evaluation Methods

    Författare :Fredrik Lundin; Göran Leijon; Carsten Wikkelsø; Bertil Romner; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Introduction. Idiopathic normal pressure hydrocephalus (iNPH) is a condition with enlargement of the cerebral ventricular system and an intracranial pressure (ICP) within normal limits. LÄS MER

  5. 4. Omniparametric simulation of the two-type Richardson model

    Författare :Fredrik Lundin; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  7. 5. Improving the functionality of synchronous machines using power electronics

    Författare :Fredrik Evestedt; Urban Lundin; C. Johan. D. Abrahamsson; Jon Kjellin; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Power electronics; Synchronous machines; Excitation systems; Magnetic thrust bearing; Starting synchronous machines; Split rotor; Rotating electronics; Magnetic fields; Measurement systems; Unbalanced magnetic pull; Harmonics; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : With the advent of modern power electronics there is reason to explore what can be achieved when it is applied to a mature technology like synchronous machines. In this text several concepts will be presented on how it is possible to control forces and how to get better performance out of synchronous machines by using power electronics. LÄS MER