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Visar resultat 11 - 15 av 74 avhandlingar som matchar ovanstående sökkriterier.

  1. 11. Game Theory and Agents

    Författare :Stefan J. Johansson; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Game Theory; Multi-Agent Systems; No Free Lunch Theorem; Characteristic Distributions;

    Sammanfattning : A fundamental problem in multi agent systems is conflict resolution. A conflict occurs in general when the agents have to deal with inconsistent goals, such as a demand for shared resources. We investigate how a game theoretic approach may be a helpful and efficient tool in examining a class of conflicts in multi agent systems. LÄS MER

  3. 12. On Coordination in Multi-agent Systems

    Författare :Stefan J. Johansson; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Multi-agent systems; Game theory; Dynamic resource allocation;

    Sammanfattning : Agent technology enables the designers of computer based systems to construct software agents that are able to model attitudes. We present a frame-work in which these artifacts aim to express the preferences of both their designers and their owners. LÄS MER

  4. 13. Long-term Voltage Stability in Power Systems - Alleviating the Impact of Generator Current Limiters

    Författare :Stefan Johansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rotor thermal overloading; dynamic load modelling; voltage stability; field current limiter; active power rescheduling; overexcitation limiter; armature current limiter; long-term power system dynamic stability;

    Sammanfattning : The main issues in this dissertation are the behaviour of current limiters protecting synchronous generators, and the interactions that occur with other components in the power system during a voltage instability. The importance of these limiters for the voltage stability is shown both in the analysis of small models and in the simulations of larger networks. LÄS MER

  5. 14. Micro-Flow Reactors for Kinetic Studies of Model Catalysts made by Electron-Beam Lithography

    Författare :Stefan Johansson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bistability; catalysis; nano-fabrication; supported model catalyst; CO oxidation; electron-beam lithography EBL ; micro-reactor;

    Sammanfattning : The main objective of this work is to explore the potential of using electron beam lithography (EBL) to prepare well defined supported model catalysts, which can be used for catalytic research. The work has involved three major areas (i) EBL-fabrication of catalysts, (ii) design of a micro-flow reactor for catalytic evaluation, and (iii) problem oriented research using EBL-fabricated model catalysts. LÄS MER

  7. 15. Model studies with nanofabricated and traditional supported catalysts

    Författare :Stefan Johansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; model catalyst; catalysis; electron-beam litography; micro-reactor; PdO; nanofabrication; hysteresis;

    Sammanfattning : .... LÄS MER