Sökning: "Symmetry groups"

Visar resultat 1 - 5 av 23 uppsatser innehållade orden Symmetry groups.

1. 1. Systematics and the evolution of flower symmetry of Posoqueria (Rubiaceae)

   Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap

   Författare :Sebastián Giraldo Gómez; [2023-06-14]
   Nyckelord :Posoquerieae; Cinchonoideae; Ixoroideae; Dialypetalanthoideae; Angiosperms 353; target capture; Hybpiper; Pollen Catapult Mechanism.;

   Sammanfattning : The genus Posoqueria is a Neotropical group of shrubs and trees in the coffee family Rubiaceae. Posoqueria is phylogenetically poorly understood and presents several internal taxonomical difficulties. LÄS MER

3. 2. More efficient training using equivariant neural networks

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen Vi3

   Författare :Karl Bylander; [2023]
   Nyckelord :convolutional neural networks; equivariance; equivariant neural networks; transmission electron microscopy; machine learning;

   Sammanfattning : Convolutional neural networks are equivariant to translations; equivariance to other symmetries, however, is not defined and the class output may vary depending on the input's orientation. To mitigate this, the training data can be augmented at the cost of increased redundancy in the model. LÄS MER

4. 3. Multi-Scale Topology Optimization of Lattice Structures Using Machine Learning

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad mekanik

   Författare :Julia Ibstedt; [2023]
   Nyckelord :Topology optimization; Multi-scale topology optimization; Machine learning; Gaussian process; Homogenization; Inverse homogenization; Anisotropic materials; Symmetry groups; Material property space; Topologioptimering; Flerskalig topologioptimering; Maskininlärning; Gaussian process; Homogenisering; Anisotropa material; Symmetrigrupper; Materialegenskapsrymd;

   Sammanfattning : This thesis explores using multi-scale topology optimization (TO) by utilizing inverse homogenization to automate the adjustment of each unit-cell's geometry and placement in a lattice structure within a pressure vessel (the design domain) to achieve desired structural properties. The aim is to find the optimal material distribution within the design domain as well as desired material properties at each discretized element and use machine learning (ML) to map microstructures with corresponding prescribed effective properties. LÄS MER

5. 4. An Introduction to p-adic Analytic Groups

   Kandidat-uppsats, Lunds universitet/Matematik LTH; Lunds universitet/Matematik (naturvetenskapliga fakulteten); Lunds universitet/Matematikcentrum

   Författare :Frieder Selisko; [2023]
   Nyckelord :Mathematics and Statistics;

   Sammanfattning : In this thesis we introduce the concept of a p-adic analytic pro-p group. To do so we discuss important theorems and concepts connected to more general types of groups, these include profinite groups, pro-p groups, powerful p-groups, powerful pro-p groups and uniform groups... LÄS MER

7. 5. Gait screening using a mobile phone application : horse asymmetry levels and usability of a mobile phone application for gait analysis, during a long format FEI eventing competition

   Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Anatomy, Physiology and Biochemistry

   Författare :Jonna Martinsson; [2022]
   Nyckelord :Gait analysis; motion asymmetry; performing horses; FEI eventing; Artificial intelligence; computer vision; kinematics; gait screening; mobile phone application;

   Sammanfattning : Orthopaedic disorders are the most common reason for unplanned rest in the performing horse population. Locomotor disorders which slowly build up to clear lameness might be avoidable with easy access objective motion measurement devices. LÄS MER