Sökning: "fasdiagram"

Hittade 4 uppsatser innehållade ordet fasdiagram.

1. 1. Phase Diagrams of Finite Spin Chains with Coupled Spin and Lattice Vibrations

   Kandidat-uppsats, Uppsala universitet/Materialteori

   Författare :Siri Alva Berge; [2021]
   Nyckelord :spin-lattice coupling; spin-vibration coupling; Heisenberg exchange; magnetism;

   Sammanfattning : The spin-lattice coupling is due to itinerant electrons interacting with both spins of ions and phonons, mediating a coupling between magnetic spin moments and lattice vibrations. In this project, the coupling is studied systematically for finite quantum spin chains of size 2 – 10. LÄS MER

3. 2. Graph neural networks for prediction of formation energies of crystals

   Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

   Författare :Filip Ekström; [2020]
   Nyckelord :Machine learning; graph neural networks; formation energies; crystal; transfer learning; phase diagram; Maskininlärning; graf-neuronnät; formationsenergier; kristall; transfer learning; fasdiagram;

   Sammanfattning : Predicting formation energies of crystals is a common but computationally expensive task. In this work, it is therefore investigated how a neural network can be used as a tool for predicting formation energies with less computational cost compared to conventional methods. LÄS MER

4. 3. Phase Behavior of Water and Cyclodextrin Systems

   Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)

   Författare :Markus Enekvist; [2017]
   Nyckelord :Phase Diagram; Chemical Engineering; Cyclodextrin; Pharmaceutical Technology; läkemedelsteknologi; Technology and Engineering;

   Sammanfattning : The effect of water on α-, β-, and γ-cyclodextrins (CD) was investigated using sorption calorimetry, differential scanning calorimetry and dynamic vapor sorption in order to understand the phase behavior and to create phase diagrams. By relating earlier X-ray diffraction patterns of cyclodextrins equilibrated over saturated salt solutions and literature regarding the cyclodextrin hydrates to the sorption calorimetry and vapor sorption results, it proved possible to determine several distinct cyclodextrin structures depending on the cyclodextrin/water composition. LÄS MER

5. 4. Large scale inference under sparse and weak alternatives: non-asymptotic phase diagram for CsCsHM statistics

   Master-uppsats, KTH/Matematisk statistik

   Författare :Oskar Stattin; [2017]
   Nyckelord :;

   Sammanfattning : High-throughput measurement technology allows to generate and store huge amounts of features, of which very few can be useful for any one single problem at hand. Examples include genomics, proteomics and astronomy, where massive multiple testing often needs to be per- formed, expecting a few significant effects and essentially a null back- ground. LÄS MER