Sökning: "model complexity"

Visar resultat 1 - 5 av 1371 avhandlingar innehållade orden model complexity.

  1. 1. Simplicity within Complexity : Understanding dynamics of cellular networks by model reduction

    Författare :Olivia Eriksson; Jesper Tegnér; Arne Elofsson; Yishao Zhou; Stefan Bornholdt; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; model reduction; cellular networks; dynamical modules; delayed piecewise linear; systems biology; Biochemistry; Biokemi; biokemi; Biochemistry;

    Sammanfattning : Cellular networks composed of interactions between genes, proteins and metabolites, determines the behavioural repertoire of the cell. Recent developments in high-throughput experimental techniques and computational methods allow static descriptions of these networks on a genome scale. LÄS MER

  3. 2. Constructing Evolutionary Trees - Algorithms and Complexity

    Författare :Anna Östlin; Institutionen för datavetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computer science; Maximum homeomorphic subtrees; Consensus trees; Experiment model; Evolutionary trees; Complexity; Computational biology; Algorithms; Data structures; numerical analysis; systems; control; Datalogi; numerisk analys; system; kontroll; Biology; Biologi;

    Sammanfattning : In this thesis three general problems concerning construction of evolutionary trees are considered. Algorithms for the problems are presented and the complexity of the problems is investigated. The thesis consists of three corresponding parts. The first part is devoted to the problem of constructing evolutionary trees in the experiment model. LÄS MER

  4. 3. Model Adaptivity in Elasticity

    Författare :David Heintz; Göteborgs universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; finite element method; dimension reduction; a posteriori error; model error; model adaptivity; model error;

    Sammanfattning : We consider model adaptivity in elasticity for dimensionally reduced forms, and shall treat different conceptual approaches. The basic idea, however, is to adaptively refine, not only the computational mesh, but also the underlying mathematical formulation. LÄS MER

  5. 4. Institutional Tensions and Complexity in the Digital Innovation of Incumbent Business Models

    Författare :Erdelina Kurti; Anita Mirijamdotter; Jeff Winter; Åkesson Maria; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; business model; digitalization; digital business model innovation; digital technologies; institutional logics; complexity; newspaper industry; Informatik; Information Systems;

    Sammanfattning : Digitalization has influenced all areas of our lives, including businesses. It has provided numerous opportunities to organisations; at the same time, it has significantly challenged established business models in many sectors that were traditionally proven to be stable and successful, thus a need to innovate was called for. LÄS MER

  7. 5. Gradients of time and complexity : understanding how riparian and instream ecosystems recover after stream restoration

    Författare :Eliza Maher Hasselquist; Christer Nilsson; Stewart Rood; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bioassessment; biodiversity; boreal; bryophyte; chronosequence; complexity; diatom; geomorphology; habitat heterogeneity; hydromorphological; macroinvertebrate; macrophyte; nitrogen cycling; river restoration; riparian buffer; stable isotopes; succession; Sweden; Environmental Science; miljövetenskap;

    Sammanfattning : Why evaluations of the ecological outcomes of stream and river restoration have largely reported inconclusive or negative results has been the subject of much debate over the last decade or more. Understanding the reasons behind the lack of positive results is important for bettering future restoration efforts and setting realistic expectations for restoration outcomes. LÄS MER