Sökning: "Anna Wigren"

Hittade 3 avhandlingar innehållade orden Anna Wigren.

  1. 1. Exploiting conjugacy in state-space models with sequential Monte Carlo

    Författare :Anna Wigren; Fredrik Lindsten; Umberto Picchini; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Electrical Engineering with specialization in Signal Processing; Elektroteknik med inriktning mot signalbehandling;

    Sammanfattning : Many processes we encounter in our daily lives are dynamical systems that can be described mathematically using state-space models. Exact inference of both states and parameters in these models is, in general, intractable. LÄS MER

  3. 2. Sequential Monte Carlo methods for conjugate state-space models

    Författare :Anna Wigren; Fredrik Lindsten; Lawrence Murray; Riccardo Sven Risuleo; Simon Maskell; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sequential Monte Carlo; Particle filter; Markov chain Monte Carlo; Conjugacy; State-space model; Probabilistic programming; Electrical Engineering with specialization in Signal Processing; Elektroteknik med inriktning mot signalbehandling;

    Sammanfattning : Bayesian inference in state-space models requires the solution of high-dimensional integrals, which is intractable in general. A viable alternative is to use sample-based methods, like sequential Monte Carlo, but this introduces variance into the inferred quantities that can sometimes render the estimates useless. LÄS MER

  4. 3. The influence of wicked problems on community-based entrepreneurship in rural Sweden

    Författare :Anne Pierre; Yvonne von Friedrichs; Anna Sörensson; Caroline Wigren-Kristoferson; Mittuniversitetet; []
    Nyckelord :Social entrepreneurship; community-based entrepreneurship; wicked problems; small business development; rural local development; state-society synergy;

    Sammanfattning : Entrepreneurship research has, since the 1930’s, mainly focused on so-called traditional entrepreneurship and studies have to a large part discussed management processes. During the past 40 years social entrepreneurship research and research into community-based entrepreneurship and practice has emerged, as a response to changes in society due to global, regional and local events that affect local development. LÄS MER