Essays about: "Metropolis algorithm."

Showing result 11 - 15 of 23 essays containing the words Metropolis algorithm..

  1. 11. Properties of cluster-size heterogeneity near the phase transition in the two-dimensional Ising model

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Renée Kauppi; [2020]
    Keywords : Ising model; Cluster-size heterogeneity; Phase transition;

    Abstract : Two different definitions of cluster-size heterogeneity are investigated as well as correlation time of different quantities using the Metropolis algorithm and the Wolff algorithm. It is confirmed that the correlation time multiplied by the computation time is lower for the Wolff algorithm in an area around the critical temperature. READ MORE

  3. 12. Reconstruction of past European land cover from pollen data: using spatial statistics and Crank-Nicolson Monte Carlo

    University essay from Lunds universitet/Matematisk statistik

    Author : Lovisa Svensson; [2019]
    Keywords : Pollen data; compositional data; Dirichlet distribution; spatio-temporal reconstruction; Kronecker product; Gaussian Markov random field GMRF ; Markov Chain Monte Carlo MCMC ; Metropolis Hastings MH ; Metropolis adjusted Langevin algorithm MALA ; Mathematics and Statistics;

    Abstract : Given a pollen data set from Europe over a time period, the aim is to reconstruct the past land cover by interpolating from the pollen data values to a continuous map. The data is on compositional form with three vegetation categories; coniferous forest, broadleaved forest and open land. READ MORE

  4. 13. Best practice of extracting magnetocaloric properties in magnetic simulations

    University essay from Uppsala universitet/Materialteori

    Author : Johan Bylin; [2019]
    Keywords : Magnetocaloric effect; Thermodynamics; Statistical mechanics; Monte Carlo simulations; Metropolis algorithm; Wang-Landau method; Isothermal change in entropy; Adiabatic change in temperature; Numerical methods; Effective spin models;

    Abstract : In this thesis, a numerical study of simulating and computing the magnetocaloric properties of magnetic materials is presented. The main objective was to deduce the optimal procedure to obtain the isothermal change in entropy of magnetic systems, by evaluating two different formulas of entropy extraction, one relying on the magnetization of the material and the other on the magnet's heat capacity. READ MORE

  5. 14. Monte Carlo Optimization of Neuromorphic Cricket Auditory Feature Detection Circuits in the Dynap-SE Processor

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Mattias Nilsson; [2018]
    Keywords : Neuromorphic engineering; Spiking neural networks; Pattern recognition; Feature detection; Training protocol; Software tools;

    Abstract : Neuromorphic information processing systems mimic the dynamics of neurons and synapses, and the architecture of biological nervous systems. By using a combination of sub-threshold analog circuits, and fast programmable digital circuits, spiking neural networks with co-localized memory and computation can be implemented, enabling more energy-efficient information processing than conventional von Neumann digital computers. READ MORE

  6. 15. Lateral interactions between protein molecules adsorbed onto a planar interface

    University essay from Lunds universitet/Kemiska institutionen

    Author : Niels Kouwenhoven; [2017]
    Keywords : Monte Carlo simulation 2D Van Der Waals; nanochemistry; nanokemi; Chemistry;

    Abstract : This paper seeks to express the chemical potential for proteins on a surface in terms of number surface densitiy. Generalized Van der Waals (GVdW) theory and Virial hard disk theory are explored and fitted to experimental data by varying the hard disk radius. READ MORE