Sökning: "restricted model"

Visar resultat 6 - 10 av 447 avhandlingar innehållade orden restricted model.

  1. 6. Distribution Patterns and Metapopulation Dynamics of Epiphytic Mosses and Lichens

    Författare :Tord Snäll; Håkan Rydin; Johan Ehrlén; Christine Ray; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; plant; metapopulation; model; parameterization; connectivity; dispersal; colonization; extinction; epiphytic; bryophyte; lichen; boreal; fragmentation; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : This thesis examines the relative importance of local conditions, dispersal and dynamics of the trees on epiphyte distribution patterns and colonization-extinction dynamics. Study species are the mosses Orthotrichum speciosum and O. obtusifolium, and the red-listed Neckera pennata. LÄS MER

  3. 7. Modeling lichen performance in relation to climate : scaling from thalli to landscapes

    Författare :Anna V Jonsson Čabrajić; Kristin Palmqvist; Jon Moen; Per-Anders Esseen; Mikaell Ottosson-Löfvenius; Göran Ågren; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lichen; growth; model; micro-climate; hydration; activation; photosynthesis; respiration; Terrestrial ecology; Terrestisk ekologi; ekologisk botanik; Ecological Botany;

    Sammanfattning : Lichens can colonize nearly all terrestrial habitats on earth and are functionally important in many ecosystems. Being poikilohydric, their active growth periods are restricted to periods when the thallus is hydrated from atmospheric water sources, such as rain, fog and high relative humidity. LÄS MER

  4. 8. Contributions to Estimation and Testing Block Covariance Structures in Multivariate Normal Models

    Författare :Yuli Liang; Tatjana von Rosen; Dietrich von Rosen; Ivan Žežula; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Block circular symmetry; covariance parameters; explicit maximum likelihood estimator; likelihood ratio test; restricted model; Toeplitz matrix; Statistics; statistik;

    Sammanfattning : This thesis concerns inference problems in balanced random effects models with a so-called block circular Toeplitz covariance structure. This class of covariance structures describes the dependency of some specific multivariate two-level data when both compound symmetry and circular symmetry appear simultaneously. LÄS MER

  5. 9. Catching the Bus in Old Age - Methodological Aspects of Accessibility Assessments in Public Transport

    Författare :Gunilla Carlsson; Hållbar vardag och hälsa i ett livsperspektiv; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Rehabilitering medicinsk och social ; revalidation; rehabilitation; kinesitherapy; cluster analysis; activity; functional limitation; crticial incident; Enabler; environment; elderly; focus group; model; occupational therapy; participant observation; planning; performance; travel; Physical medicine; Road transport technology; Vägtransportteknik;

    Sammanfattning : Engagement in daily activities is central for people’s health and well-being. Today, our activity arenas mostly cover great geographical areas, and to reach different activities we must travel. However, people with functional limitations are sometimes restricted in their travelling. LÄS MER

  7. 10. Structure exploiting optimization methods for model predictive control

    Författare :Emil Klintberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Multi-stage robust MPC; Optimization methods.; Model Predictive Control; Distributed optimization;

    Sammanfattning : This thesis considers optimization methods for Model Predictive Control (MPC). MPC is the preferred control technique in a growing set of applications due to its flexibility and to the natural way in which constraints can be incorporated in the control policy. LÄS MER