Sökning: "Geometric structure"

Visar resultat 6 - 10 av 189 avhandlingar innehållade orden Geometric structure.

  1. 6. Quantum transport and geometric integration for molecular systems

    Författare :Anders Odell; Anna Delin; Anders Niklasson; Michael Springborg; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; density functional theory; ab initio; first principles; electron transport; photoswitching; molecular dynamics; geometric integration; Condensed matter physics; Kondenserade materiens fysik; Computational physics; Beräkningsfysik;

    Sammanfattning : Molecular electronics is envisioned as a possible next step in device miniaturization. It is usually taken to mean the design and manufacturing of electronic devices and applications where organic molecules work as the fundamental functioning unit. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

  3. 8. Geometric and Electronic Structure of Metal-Metal Bonded Systems

    Författare :Jan Rosdahl; Lars Kloo; Risto Laitinen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; Oorganisk kemi; Inorganic chemistry; Oorganisk kemi;

    Sammanfattning : .... LÄS MER

  4. 9. Adaptive Geometric Numerical Integration of Mechanical Systems

    Författare :Klas Modin; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multibody dynamics; Geometric numerical integration; rolling bearing simulation; adaptive time-stepping; variable time-step;

    Sammanfattning : This thesis is about structure preserving numerical integration of initial value problems, i.e., so called geometric numerical integrators. LÄS MER

  5. 10. The Structural Basis for Magnetic Order in New Manganese Compounds

    Författare :Therese Eriksson; Yvonne Andersson; Helmer Fjellvåg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; Crystal structure; Magnetic structure; Manganese compounds; Transition metal silicides; Transition metal germanides; Magnetic frustration; Neutron powder diffraction; X-ray diffraction; Magnetisation measurements; DFT; Oorganisk kemi; Inorganic chemistry; Oorganisk kemi;

    Sammanfattning : Materials with new or improved properties are crucial for technological development. To provide the foundation for future successful products, it is important to prepare and characterise new chemical compounds that could show unusual properties. LÄS MER