Sökning: "horseshoe"

Visar resultat 1 - 5 av 19 uppsatser innehållade ordet horseshoe.

  1. 1. Regularization Methods and High Dimensional Data: A Comparative Study Based on Frequentist and Bayesian Methods

    Kandidat-uppsats, Lunds universitet/Statistiska institutionen

    Författare :Markus Gerholm; Johan Sörstadius; [2024]
    Nyckelord :Linear regression; high dimensional data; regularization; Bayesian methods; Mathematics and Statistics;

    Sammanfattning : As the amount of high dimensional data becomes increasingly accessible and common, the need for reliable methods to combat problems such as overfitting and multicollinearity increases. Models need to be able to manage large data sets where predictor variables often outnumber the amount of observations. LÄS MER

  3. 2. Spatial Statistical Modelling of Insurance Claim Frequency

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Daniel Faller; [2022]
    Nyckelord :Insurance risk; claim frequency; Markov chain Monte Carlo MCMC ; Riemann manifold Metropolis adjusted Langevin algorithm MMALA ; spatial statistics; Gaussian Markov random field GMRF ; preconditioned Crank Nicolson Langevin algorithm pCNL ; Gibbs sampling; Bayesian hierarchical modelling; high dimensional; shrinkage prior; horseshoe prior; regularisation.; Mathematics and Statistics;

    Sammanfattning : In this thesis a fully Bayesian hierarchical model that estimates the number of aggregated insurance claims per year for non-life insurances is constructed using Markov chain Monte Carlo based inference with Riemannian Langevin diffusion. Some versions of the model incorporate a spatial effect, viewed as the relative spatial insurance risk that originates from a policyholder's geographical location and where the relative spatial insurance risk is modelled as a continuous spatial field. LÄS MER

  4. 3. The tilted horseshoe: Euroscepticism in the Nordic A study of the changing course of politics in far left and far right parties.

    Kandidat-uppsats, Lunds universitet/Statsvetenskapliga institutionen

    Författare :Rebecka Lönnqvist; [2022]
    Nyckelord :European Union; Euroscepticism; Far Left; Far Right; Brexit; Law and Political Science;

    Sammanfattning : The purpose of this thesis is to study the changes that occurred within the far left and far right parties of the Nordic member states of the European Union, regarding their euroscepticism. The study aims towards both mapping out the changes of the parties political course as well as comparing the political standpoints between the countries. LÄS MER

  5. 4. Have Radial Velocity Surveys Missed Any Planets?

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

    Författare :Shah Raj; [2021]
    Nyckelord :radial velocity survey; transit method; exoplanet; habitable zone; habitable zone boundaries; HZ; early Mars; recent Venus; stability; instability; chaos; REBOUND; MEGNO; MEGNO maps; Hill sphere; stable systems; unstable systems; Physics and Astronomy;

    Sammanfattning : The project was aimed at numerically assessing exoplanetary systems to distinguish their capabilities of hosting additional planets. The shortcomings of the radial velocity method sometimes causes hindrance in the detection of terrestrial planets. LÄS MER

  7. 5. Att förena de oförenliga: Är både vänster och högerradikala partier nationalistiska? En kvantitativ undersökning av europartiers nationalism.

    Kandidat-uppsats, Lunds universitet/Statsvetenskapliga institutionen

    Författare :Nils Karlsson; [2020]
    Nyckelord :Europartier; Nationalism; Hästskoteorin; Radikala partier; Kvantitativ innehållsanalys; Law and Political Science;

    Sammanfattning : This paper studies nationalism within radical europarties. Europarties are in turn parties at the European level which consist of multiple national parties. LÄS MER