Essays about: "low-rank approximation"

Showing result 1 - 5 of 6 essays containing the words low-rank approximation.

  1. 1. Randomized Diagonal Estimation

    University essay from KTH/Matematik (Avd.)

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

    Abstract : 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. READ MORE

  3. 2. Generating Directed & Weighted Synthetic Graphs using Low-Rank Approximations

    University essay from Linköpings universitet/Artificiell intelligens och integrerade datorsystem

    Author : Erik Lundin; [2022]
    Keywords : graphs; networks; graph generation; synthetic data; machine learning; low-rank approximation;

    Abstract : Generative models for creating realistic synthetic graphs constitute a research area that is increasing in popularity, especially as the use of graph data is becoming increasingly common. Generating realistic synthetic graphs enables sharing of the information embedded in graphs without directly sharing the original graphs themselves. READ MORE

  4. 3. Multi-Frequency Direction of Arrival Estimation by Low-Rank Approximation

    University essay from Lunds universitet/Matematik LTH

    Author : Linus Jangland; [2016]
    Keywords : Direction of arrival estimation; Hankel matrices; low rank; optimization; Mathematics and Statistics;

    Abstract : We consider the problem of estimating the location of a number of wave-emitting sources, known as the direction of arrival problem. We consider both the two- and three-dimensional case. The method we use works for equally as well as unequally spaced sensors, that are located in (possibly) non-square regions. READ MORE

  5. 4. Material Identification using Multiple X-Ray Absorptiometry

    University essay from KTH/Numerisk analys, NA

    Author : Eric Landström; [2015]
    Keywords : ;

    Abstract : Dual Energy X-ray Absorptiometry is a proven technique used to identify unknown materials, by measuring the transmission of two X-ray energies. This technique is limited to measuring a single chemical quantity and is not able to handle more chemical variation. To overcome this, one approach is to use multiple-energies to resolve more information. READ MORE

  6. 5. Analysis of 2 x 2 x 2 Tensors

    University essay from Matematiska institutionen

    Author : Ana Rovi; [2010]
    Keywords : Tensor decomposition. PARAFAC decomposition. Alternating Least Squares. Tensor Rank. Typical and generic rank. Best lower-rank approximation. Tensor Toolbox for MATLAB. Degeneracy. Uniqueness. Tensor classification.;

    Abstract : The question about how to determine the rank of a tensor has been widely studied in the literature. However the analytical methods to compute the decomposition of tensors have not been so much developed even for low-rank tensors. READ MORE