Essays about: "Erik Jonsson"

Showing result 1 - 5 of 22 essays containing the words Erik Jonsson.

  1. 1. Applications of Random Walks : How Random Walks Are Used in Wilson's Algorithm and How They Connect to Electrical Networks

    University essay from Uppsala universitet/Sannolikhetsteori och kombinatorik

    Author : Erik Jonsson; [2024]
    Keywords : Random Walks; Wilson s Algorithm; Electrical Networks; Pòlya s theorem;

    Abstract : In this master thesis we will show how random walks are used in Wilson's algorithm to generate spanning trees of graphs, and how they can be used to calculate the number of spanning trees in a graph. We will also explore the connection between electrical networks and random walks, and how this connection can be exploited to prove Pólya's theorem (normally proved with probability and combinatorics) using electrical arguments. READ MORE

  3. 2. Using Machine Learning to Predict Aggregate Excess Returns

    University essay from Handelshögskolan i Stockholm/Institutionen för finansiell ekonomi

    Author : Erik Jonsson; Sebastian Gierlowski Carling; [2021]
    Keywords : Equity premium; Machine learning; Non-linear models; Penalized linear models; Prediction;

    Abstract : In this paper we examine whether standard linear regression and machine learning tools can be used to predict the time series of total returns in excess of the risk-free rate on the S&P500 and FTSE100 indices. We have virtually no success in predicting monthly returns. However, we do have some success in predicting annual returns. READ MORE

  4. 3. Predictive Energy Management of Long-Haul Hybrid Trucks : Using Quadratic Programming and Branch-and-Bound

    University essay from Linköpings universitet/Fordonssystem

    Author : Erik Jonsson Holm; [2021]
    Keywords : Predictive energy management; quadratic programming; branch-and-bound; mixed-integer quadratic programming; energy optimization; look-ahead control; model predictive control; receding horizon control; optimal control; convex optimization; heavy-duty vehicle; long-haul truck; hybrid electric vehicle;

    Abstract : This thesis presents a predictive energy management controller for long-haul hybrid trucks. In a receding horizon control framework, the vehicle speed reference, battery energy reference, and engine on/off decision are optimized over a prediction horizon. READ MORE

  5. 4. Stubbehandling vid röjning för att förebygga och minska skador av rotröta på granskog i Lettland

    University essay from SLU/School for Forest Management

    Author : Axel Jonsson; Erik Rumler; [2020]
    Keywords : Skogssällskapet; rotticka; Rotstop®;

    Abstract : En stor del av den areal Skogssällskapet förvaltar i Lettland utgörs av åkerplanterad gran, vilken riskerar att drabbas av rötsvampen rotticka (Heterobasidion spp.) i samband med kommande skötselåtgärder. READ MORE

  6. 5. Numerical Range of Square Matrices : A Study in Spectral Theory

    University essay from Linköpings universitet/Matematik och tillämpad matematik

    Author : Erik Jonsson; [2019]
    Keywords : numerical range; Gershgorin region; square matrix; spectrum;

    Abstract : In this thesis, we discuss important results for the numerical range of general square matrices. Especially, we examine analytically the numerical range of complex-valued $2 \times 2$ matrices. Also, we investigate and discuss the Gershgorin region of general square matrices. READ MORE