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Visar resultat 1 - 5 av 181 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Modeling Genome Evolution : Creation, Change and Destruction

    Författare :Mats Pettersson; Otto Berg; Paul Sniegowski; Uppsala universitet; []
    Nyckelord :Molecular biology; Theotretical biology; Population genetics; Stochastic modeling; Genome evolution; Molekylärbiologi;

    Sammanfattning : Historically, evolution has been studied either by looking at morphological traits in living organisms and the fossil record, or by using bioinformatics and comparative genomics. While highly useful for deducing evolutionary history, these approaches are not particularly well suited for studying the mechanisms of evolution. LÄS MER

  3. 2. Modeling Collective Decision-Making in Animal Groups

    Författare :Boris Granovskiy; David J. T. Sumpter; Mary R. Myerscough; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; collective animal behavior; collective intelligence; swarm intelligence; wisdom of crowds; mathematical modeling; stochastic modeling; agent-based modeling; Markov chain models;

    Sammanfattning : Many animal groups benefit from making decisions collectively. For example, colonies of many ant species are able to select the best possible nest to move into without every ant needing to visit each available nest site. LÄS MER

  4. 3. Stochastic Modeling and Simulation of the TCP protocol

    Författare :Jörgen Olsén; Ingemar Kaj; Joachim Charzinski; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical statistics; TCP; flow-control; network simulator; ns-2; stochastic modeling; throughput; packet loss rate; fixed-point method; Matematisk statistik; Mathematical statistics; Matematisk statistik;

    Sammanfattning : The success of the current Internet relies to a large extent on a cooperation between the users and the network. The network signals its current state to the users by marking or dropping packets. The users then strive to maximize the sending rate without causing network congestion. LÄS MER

  5. 4. Modeling flow and transport in fractured rock : role of heterogeneity, support scale and transport channeling

    Författare :Magnus Oden; Uppsala universitet; []
    Nyckelord :fractured rock; modeling; heterogeneity; stochastic models; scale;

    Sammanfattning : .... LÄS MER

  7. 5. Stochastic Reactor Models for Engine Simulations

    Författare :Martin Tunér; Förbränningsmotorer; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SRM; Stochastic Reactor Model; Engine Simulation; Chemical kinetics; HCCI; Direct injection; Combustion; NVO; Modeling; PDF;

    Sammanfattning : The aim of the thesis work is the further development of practical engine simulation tools based on Stochastic Reactor Models, SRMs. Novel and efficient implementations were made of a variety of SRMs adapted to different engine types. The models in question are the HCCI-SRM, the TwoZone SI-SRM and the DI-SRM. LÄS MER