Sökning: "MATHEMATICS Applied mathematics Optimization"

Visar resultat 1 - 5 av 88 avhandlingar innehållade orden MATHEMATICS Applied mathematics Optimization.

  1. 1. Contributions to dual subgradient optimization and maintenance scheduling

    Författare :Emil Gustavsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Subgradient optimization; Lagrangian duality; convex programming; maintenance scheduling; integer optimization; Lagrangian duality;

    Sammanfattning : This thesis analyses two topics within the area of mathematical optimization; dual subgradient methods and maintenance optimization. The first two papers consider dual subgradient methods, and the third paper considers maintenance optimization. LÄS MER

  3. 2. Toward Robust Optimization of Adaptive Radiation Therapy

    Författare :Michelle Böck; Anders Forsgren; Minsun Kim; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optimization; adaptive radiation therapy; radiation therapy treatment planning; uncertainty; robust optimization; stochastic programming; Tillämpad matematik och beräkningsmatematik; Applied and Computational Mathematics;

    Sammanfattning : Adaptive radiation therapy is an evolving cancer treatment approach which relies on adapting the treatment plan in response to patient-specific interfractional geometric variations occurring during the fractionated treatment. If those variations are not addressed through adaptive replanning, the resulting treatment quality may be compromised. LÄS MER

  4. 3. Automated radiation therapy treatment planning by increased accuracy of optimization tools

    Författare :Lovisa Engberg; Anders Forsgren; Marina A. Epelman; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optimization; intensity-modulated radiation therapy; radiation therapy treatment planning; automated radiation therapy treatment planning; interior-point methods; Optimering; intensitetsmodulerad strålbehandling; dosplanering; automatiserad dosplanering; inrepunktsmetoder; Mathematics; Matematik;

    Sammanfattning : Every radiation therapy treatment is preceded by a treatment planning phase. In this phase, a treatment plan that specifies exactly how to irradiate the patient is designed by the treatment planner. LÄS MER

  5. 4. Optimization of low-cost integration of wind and solar power in multi-node electricity systems: Mathematical modelling and dual solution approaches

    Författare :Caroline Granfeldt; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; variable renewable electricity; Lagrangian relaxation; ADMM; electricity system modelling; variable splitting; capacity expansion; cost optimization; variation management; consensus algorithm; subgradient algorithm;

    Sammanfattning : The global production of electricity contributes significantly to the release of CO2 emissions. Therefore, a transformation of the electricity system is of vital importance in order to restrict global warming. LÄS MER

  7. 5. Algorithms for Costly Global Optimization

    Författare :Nils-Hassan Quttineh; Kenneth Holmström; Hans Bruun Nielsen; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optimization; systems theory; Optimeringslära; systemteori; Mathematics Applied Mathematics; Matematik tillämpad matematik;

    Sammanfattning : There exists many applications with so-called costly problems, which means that the objective function you want to maximize or minimize cannot be described using standard functions and expressions. Instead one considers these objective functions as ``black box'' where the parameter values are sent in and a function value is returned. LÄS MER