Results 21 to 30 of about 244,383 (211)

A note on the eigensystem of the covariance matrix of dichotomous Guttman items

Frontiers in Psychology, 2015
We consider the sample covariance matrix for dichotomous Guttman items under a set of uniformity conditions, and obtain closed-form expressions for the eigenvalues and eigenvectors of the matrix.
Clintin P Davis-Stober, Jean-Paul eDoignon, Reinhard eSuck   +2 more
doaj   +1 more source

Elements of dynamic parameters modification and sensitivity [PDF]

FME Transactions, 2013
Structural modifications can cause changes in the matrices of some elements. Depending on the type of structure, or a desired change, a group of elements can be modified.
Trišović Nataša, Maneski Taško, Golubović Zorana, Segla Štefan   +3 more
doaj  

Eigenvector-spatial localisation [PDF]

Tellus A: Dynamic Meteorology and Oceanography, 2021
We present a new multiscale covariance localisation method for ensemble data assimilation that is based on the estimation of eigenvectors and subsequent projections, together with traditional spatial localisation applied with a range of localisation lengths.
Travis Harty, Matthias Morzfeld, Chris Snyder   +2 more
openaire   +2 more sources

The Spectrum of the Neumann Matrix with Zero Modes [PDF]

, 2002
We calculate the spectrum of the matrix M' of Neumann coefficients of the Witten vertex, expressed in the oscillator basis including the zero-mode a_0. We find that in addition to the known continuous spectrum inside [-1/3,0) of the matrix M without the ...
, B. Feng, Bo Feng, D. Gaiotto, D.J. Gross, D.J. Gross, D.J. Gross, D.J. Gross, G. Moore, H. Hata, K. Furuuchi, K. Okuyama, K. Okuyama, L. Bonora, L. Rastelli, L. Rastelli, L. Rastelli, L. Rastelli, L. Rastelli, L. Rastelli, L. Rastelli, L. Rastelli, L. Rastelli, M.R. Douglas, Nicolas Moeller, P. Mukhopadhyay, T. Okuda, Yang-Hui He   +27 more
core   +3 more sources

Enhancing Lung Acoustic Signals Classification With Eigenvectors-Based and Traditional Augmentation Methods

IEEE Access
Identifying lung sound signal patterns is essential for detecting and monitoring respiratory diseases. Existing approaches for analyzing respiratory sounds need domain specialists.
Naseem Babu, Dayananda Pruthviraja, Jimson Mathew   +2 more
doaj   +1 more source

AN EIGEN-APPROACH FOR JOINT ESTIMATION OF DIRECTION-OF-ARRIVAL AND FREQUENCY OF AN UNKNOWN NUMBER OF SIGNALS

Jordanian Journal of Computers and Information Technology, 2020
An accurate method for estimating the direction-of-arrival (DOA) jointly with the frequencies of an unknown number of source signals is proposed using the Eigen-approach. Using the minimum eigenvalues of the autocorrelation matrices produces both the DOA
Thabet Mismar
doaj   +1 more source

Second order accurate distributed eigenvector computation for extremely large matrices

, 2009
We propose a second-order accurate method to estimate the eigenvectors of extremely large matrices thereby addressing a problem of relevance to statisticians working in the analysis of very large datasets.
d'Aspremont, Alexandre, Karoui, Noureddine El   +1 more
core   +2 more sources

Partial eigenvalue assignment problem of linear control systems using orthogonality relations [PDF]

Acta Montanistica Slovaca, 2006
The partial eigenvalue assignment is the problem of reassigning a part of the open-loop spectrum of a linear system by a feedback control, leaving the rest of the spectrum invariant.
Mohamed A. Ramadan, Ehab A. El - Sayed
doaj  

Eigenvector dreaming

Journal of Statistical Mechanics: Theory and Experiment
Abstract Among the performance-enhancing procedures for Hopfield-type networks that implement associative memory, Hebbian unlearning (HU) (or dreaming) strikes for its simplicity and lucid biological interpretation. However, it does not easily lend to a clear analytical understanding.
Benedetti, Marco, Carillo, Louis, Marinari, Enzo, Mézard, Marc   +3 more
openaire   +4 more sources

Eigenvectors and Reconstruction [PDF]

The Electronic Journal of Combinatorics, 2007
In this paper, we study the simple eigenvectors of two hypomorphic matrices using linear algebra. We also give new proofs of results of Godsil and McKay.
openaire   +3 more sources