Sökning: "simultaneous equation model"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden simultaneous equation model.

  1. 1. Att studera den svenska elmarknaden : En ekonometrisk analys av relationen mellan pris och kvantitet

    Kandidat-uppsats, Karlstads universitet/Handelshögskolan (from 2013)

    Författare :Moa Wallén; Lina Alexandersson; [2024]
    Nyckelord :Electricity market; electricity price; electricity consumption; electricity production; simultaneity; simultaneous equation model; Elmarknaden; elpris; elkonsumtion; elproduktion; simultanitet; simultan ekvationsmodell;

    Sammanfattning : This thesis examines how an econometric model, which allows for simultaneity, performs when estimating electricity supply and demand on the Swedish aggregated electricity market, divided into its four price areas. Previous research and theory points to the importance of taking simultaneity into consideration when estimating simultaneous equation models. LÄS MER

  3. 2. Simulation of low frequency acoustic waves in small rooms : An SBP-SAT approach to solving the time dependent acoustic wave equation in three dimensions

    Kandidat-uppsats,

    Författare :Alva Fährlin; Olle Edgren Schüllerqvist; [2023]
    Nyckelord :room acoustics; numerical methods; SBP; SAT; acoustic wave equation.;

    Sammanfattning : Low frequency acoustic room behaviour can be approximated using numerical methods. Traditionally, music studio control rooms are built with complex geometries, making their eigenmodes difficult to predict mathematically. LÄS MER

  4. 3. Numerical simulation of acoustic wave propagation with a focus on modeling sediment layers and large domains

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för beräkningsvetenskap

    Författare :Elias Estensen; [2022]
    Nyckelord :Helmholtz; wave equation; acoustics; ocean acoustics; numerical analysis; computational science; finite differences; summation by parts; sbp; waveholtz; cylindrical coordinates; sediment layers; interface; super-grid; super grid; absorbing layer; Helmholtz; vågekvationen; akustik; undervattensakustik; numerisk analys; beräkningsvetenskap; finita differenser; summation by parts; sbp; cylindriska koordinater; waveholtz; sedimentskikt; interface; super-grid; absorberande lager;

    Sammanfattning : In this report, we study how finite differences can be used to simulate acoustic wave propagation originating from a point source in the ocean using the Helmholtz equation. How to model sediment layers and the vast size of the ocean is studied in particular. LÄS MER

  5. 4. Development of heat recovery solution for heavy duty truck cabs to improve energy efficiency.

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Exekiel Aurelio; Rahul Acharya Rathnakar; [2022]
    Nyckelord :air-to-air heat recovery; air-to-liquid heat recovery; integrated thermal management system; heat wheel; heat pump; battery electric vehicle; battery electric trucks; energy savings.; luft-till-luft värmeåtervinning; luft-till-vätska värmeåtervinning; integrerat värmehanteringssystem; värmehjul; värmepump; batterielektriskt fordon; batterielektriska lastbilar; energibesparingar.;

    Sammanfattning : The recent climate actions to reduce greenhouse gas (GHG) emissions have set the stage for decarbonizing the transportation sector through electrification, which has led to a surge in the deployment of battery electric vehicles (BEV). Trucks are no exception, which has led automakers to shift their focus toward producing Battery Electric Trucks (BET). LÄS MER

  7. 5. Summation By Parts Finite Difference Methods with Simultaneous Approximation Terms for the Heat Equation with Discontinuous Coefficients

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för matematik (MA)

    Författare :Niklas Kåhlman; [2019]
    Nyckelord :Finite Difference Method; FDM; Summation By Parts; Simultaneous Approximation Terms; SBP-SAT; Heat Equation; Poisson s Equation; Discontinuous Coefficients; Piecewise Constant Coefficients; Convergence; Dual Consistency; Stability;

    Sammanfattning : In this thesis we will investigate how the SBP-SAT finite difference method behave with and without an interface. As model problem, we consider the heat equation with piecewise constant coefficients. The thesis is split in two main parts. LÄS MER