Sökning: "Diagonal estimation"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Diagonal estimation.

  1. 1. Randomized Diagonal Estimation

    Master-uppsats, KTH/Matematik (Avd.)

    Författare :Niclas Joshua Popp; [2023]
    Nyckelord :Diagonal estimation; randomized numerical linear algebra; low-rank approximation; matrix functions; Diagonalestimering; randomiserad numerisk linjär algebra; lågrankad approximation; matrisfunktioner;

    Sammanfattning : Implicit diagonal estimation is a long-standing problem that is concerned with approximating the diagonal of a matrix that can only be accessed through matrix-vector products. It is of interest in various fields of application, such as network science, material science and machine learning. LÄS MER

  3. 2. Computation of posterior covariances of object points in bundle adjustment

    Magister-uppsats, Umeå universitet/Institutionen för datavetenskap

    Författare :Niklas Kallin; [2019]
    Nyckelord :;

    Sammanfattning : Bundle adjustment (BA) is a photogrammetric method for optimal estimation of parameters from image measurements. The parameters include 3D coordinates of objects points (OP). The result of the bundle adjustment process is a vector of estimates and its covariance matrix, C. The elements of this matrix contain quality indicators of the estimation. LÄS MER

  4. 3. Parallelization of the SDIRK and Newton’s method and analysis of a weighted norm for error estimations

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Matilda Hjälle; [2016]
    Nyckelord :Numerical analysis; Parallel programming; Mathematics and Statistics;

    Sammanfattning : Execution time is an important issue in the field of numerical analysis. Simulations are getting more and more complex and the execution times are rapidly increasing. In the scope of this thesis a time integration library is used to solve initial value problems. LÄS MER

  5. 4. Estimation of Time-Varying Hedge Ratios for Coffee

    Magister-uppsats, Lunds universitet/Företagsekonomiska institutionen

    Författare :Alejandro Esteban Lombana Betancourt; Lena Al Azzawi; [2013]
    Nyckelord :Hedge ratio; basis risk; GARCH; BEKK; VECH; futures contracts; coffee; Business and Economics;

    Sammanfattning : This paper will gain better insights of how to calculate the hedge ratio to reduce the basis risk and protect against the price volatility, which is caused by the mismatch between the spot and future prices. This will be done by calculating the time-varying hedge ratio for the Colombian mild Arabica coffee, using two BGARCH models, the diagonal BEKK and diagonal VECH. LÄS MER

  7. 5. A Decentralized Stabilization Scheme for Large-scale Interconnected Systems

    Master-uppsats, KTH/Reglerteknik

    Författare :Omid Khorsand; [2010]
    Nyckelord :;

    Sammanfattning : This thesis considers the problem of decentralized control of large-scale systems by means of a decomposition and decentralization approach. Having decomposed the system into a number of interconnected subsystems a set of local decentralized controllers is constructed for individual subsystems. LÄS MER