Essays about: "Linear Covariance"

Showing result 21 - 25 of 42 essays containing the words Linear Covariance.

  1. 21. Active Noise Control with Virtual Reference Signals in an FXLMS Algorithm

    University essay from KTH/MWL Marcus Wallenberg Laboratoriet

    Author : Johan Nygren; [2018]
    Keywords : road noise; active noise control; FXLMS; virtual reference signals; vagbuller; aktiv bullerbekampning; FXLMS; virtuella referenssignaler;

    Abstract : Noise pollution from road traffic is one of the greatest environmental issues in modern day, and the social cost for road traffic noise was estimated to over 16 billion SEK per year in Sweden in2014. Passive or active control methods can be used to reduce the noise. READ MORE

  3. 22. Array Element Localisation

    University essay from Lunds universitet/Matematisk statistik

    Author : Axel Sundberg; Olle Bristedt; [2017]
    Keywords : Mathematics and Statistics;

    Abstract : Abstract—This article have been written in cooperation with The Swedish Defense Research Agency (FOI). The article proposes a method to calibrate hydrophone positions for improved underwater survailence in The Baltic Sea. READ MORE

  4. 23. An alternative approach for solving the problem of close to singular covariance matrices in modern portfolio theory

    University essay from Lunds universitet/Statistiska institutionen

    Author : Martin Claeson; [2017]
    Keywords : global minimum variance portfolio; singular covariance matrix; sector index portfolio; Business and Economics; Mathematics and Statistics;

    Abstract : In this thesis the effects of utilizing the sample covariance matrix in the estimation of the global minimum variance (GMV) portfolio are presented. When the number of assets, N, are close to the number of observations, T, the sample covariance matrix approaches singularity, leading to a lot of uncertainties in form of estimation error. READ MORE

  5. 24. An Empirical Investigation of the Merits of a Class of Analytically Tractable Matern Covariance Structures in Spatial Data Analysis

    University essay from Högskolan Dalarna/Mikrodataanalys

    Author : Ross May; [2017]
    Keywords : ;

    Abstract : I investigate, using the R package spaMM, the effect of misspecification of the smoothing parameter, Q, of the Matern covariance structure on the mean part of hierarchical generalised linear models (HGLMs) with spatially correlated Gaussian Matern random effects. In particular, by restricting Q to the set {0.5, 1.5, 2. READ MORE

  6. 25. Analysis of Arctic peak-season carbon flux estimations based on four MODIS vegetation products

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Antonin Kusbach; [2016]
    Keywords : satellite-derived data; vegetation indices; Arctic; net ecosystem exchange; big data analysis; Physical Geography and Ecosystem Science; Earth and Environmental Sciences;

    Abstract : Increased temperatures in high latitudes may alter the carbon dynamics throughout the Arctic. Modelled CO2 simulations show that current climate conditions constitute the Arctic a net carbon sink, though the large extent and fine landscape heterogeneity raise an uncertainty about the carbon sink/source status of the region. READ MORE