Search for dissertations about: "geometric quality"

Showing result 11 - 15 of 73 swedish dissertations containing the words geometric quality.

  2. 11. Learning and Evaluating the Geometric Structure of Representation Spaces

    Author : Petra Poklukar; Danica Kragic; Søren Hauberg; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Representation Learning; Machine Learning; Generative Models; Computer Science; Datalogi;

    Abstract : Efficient representations of observed input data have been shown to significantly accelerate the performance of subsequent learning tasks in numerous domains. To obtain such representations automatically, we need to design both i) models that identify useful patterns in the input data and encode them into structured low dimensional representations, and ii) evaluation measures that accurately assess the quality of the resulting representations. READ MORE

  4. 12. Robust optimization of radiation therapy accounting for geometric uncertainty

    Author : Albin Fredriksson; Anders Forsgren; Timothy C. Y. Chan; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Optimization; intensity-modulated proton therapy; uncertainty; robust planning; setup error; range error; intensity-modulated radiation therapy; multicriteria optimization;

    Abstract : Geometric errors may compromise the quality of radiation therapy treatments. Optimization methods that account for errors can reduce their effects.The first paper of this thesis introduces minimax optimization to account for systematic range and setup errors in intensity-modulated proton therapy. READ MORE

  5. 13. Minimizing the Effect of Geometric Variation in Compliant Assemblies

    Author : Stefan Dahlström; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FEA; Compliant assembly evaluation; Tolerancing; sheet metal assembly;

    Abstract : Sheet metal assemblies are often used as support structures in automobiles, airplanes and appliances. These structures not only provide a frame for other modules to be assembled, but also give the product its aesthetic form. All assembly processes are affected by part and process variation. READ MORE

  6. 14. Reconstruction of geometric road data using remotely sensed imagery

    Author : Dan Klang; KTH; []
    Keywords : ;

    Abstract : The objective of this thesis is to find an automatic methodfor accurate and robust reconstruction of geometric road data.Remotely sensed images serve as the main source during thereconstruction process. READ MORE

  7. 15. Geometric distortions in MRI based radiotherapy and PET/MRI

    Author : Josef Lundman; Tufve Nyholm; Anne Larsson; Jörgen Olofsson; Marco Riboldi; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic resonance imaging; MRI; PET MR; PET MRI; medical imaging; radiotherapy; geometrical distortions; MR-only; MRI-only; radiofysik; radiation physics;

    Abstract : Magnetic resonance imaging (MRI) offers high soft-tissue contrast compared to computed tomography (CT). This contrast is helpful in many cases, not least for delineating tumours for radiotherapy treatment, and has led to increasing use in radiotherapy treatment planning (RTP). READ MORE