Results 41 to 50 of about 5,971,680 (301)

The inverse eigenvalue problem for symmetric anti-bidiagonal matrices [PDF]

, 2005
The inverse eigenvalue problem for real symmetric matrices of the form000⋯00∗000⋯0∗∗000⋯∗∗0·⋮⋮⋮·⋮⋮⋮·00∗⋯0000∗∗⋯000∗∗0⋯000is solved. The solution is shown to be unique.
Holtz, Olga
core   +1 more source

Brain Network Dynamics of Local and Global Predictive Processing in Aging

Advanced Science, EarlyView.
Separation of concurrent whole‐brain networks in source‐reconstructed magnetoencephalography (MEG) data suggests that healthy aging reorganizes, rather than uniformly attenuates, neural responses elicited from hierarchical auditory violations. Enhanced early sensory deviance processing alongside reduced higher‐order cognitive responses suggests a large‐
Mathias Houe Andersen, Gemma Fernández‐Rubio, David R. Quiroga‐Martinez, Mattia Rosso, Mathias Klarlund, Kit Melissa Larsen, Hartwig Roman Siebner, Morten L. Kringelbach, Peter Vuust, Leonardo Bonetti   +9 more
wiley   +1 more source

Aggregating distributed energy resources for grid flexibility services: A distributed game theoretic approach

International Journal of Robust and Nonlinear Control, EarlyView., 2023
Abstract We propose a hierarchical energy management scheme for aggregating Distributed Energy Resources (DERs) for grid flexibility services. To prevent a direct participation of numerous prosumers in the wholesale electricity market, aggregators, as self‐interest agents in our scheme, incentivize prosumers to provide flexibility. We firstly model the
Xiupeng Chen, Mehran Shakarami, Jacquelien M. A. Scherpen, Nima Monshizadeh   +3 more
wiley   +1 more source

Defect‐Symmetry Engineered Gyroidal Photonic Crystals Achieve Monotonic Modulation of Bandgap Width With a Stable Mid‐Gap

Advanced Science, EarlyView.
Inspired by the twin grain boundary discovered in natural gyroidal networks, a series of gyroid‐derived photonic crystals are constructed based on defect‐symmetry engineering. The new series of structures enables monotonic tuning of the width of the photonic bandgap (PBG) while the central frequency of the PBG maintains stable.
Shuo Huang, Yang Zhou, Wenxin Ning, Hengliang Wang, Lu Han, Xueyan Feng   +5 more
wiley   +1 more source

Extremal Inverse Eigenvalue Problem for a Special Kind of Matrices

Journal of Applied Mathematics, 2014
We consider the following inverse eigenvalue problem: to construct a special kind of matrix (real symmetric doubly arrow matrix) from the minimal and maximal eigenvalues of all its leading principal submatrices. The necessary and sufficient condition for
Zhibing Liu, Yeying Xu, Kanmin Wang, Chengfeng Xu   +3 more
doaj   +1 more source

An efficient finite element method and error analysis for eigenvalue problem of Schrödinger equation with an inverse square potential on spherical domain

Advances in Difference Equations, 2020
We provide an effective finite element method to solve the Schrödinger eigenvalue problem with an inverse potential on a spherical domain. To overcome the difficulties caused by the singularities of coefficients, we introduce spherical coordinate ...
Yubing Sui, Donghao Zhang, Junying Cao, Jun Zhang   +3 more
doaj   +1 more source

On the multiplicative inverse eigenvalue problem

, 2018
An important inverse eigenvalue problem is the problem of finding a density q(x) such that the operator  , with the appropriate boundary conditions, possesses o prescribed spectrum, that is, the inverse vibrating string ...
Soto Montero, Ricardo Lorenzo
core   +1 more source

Machine Learning‐Enhanced Random Matrix Theory Design for Human Immunodeficiency Virus Vaccine Development

Advanced Intelligent Discovery, EarlyView.
This study integrates random matrix theory (RMT) and principal component analysis (PCA) to improve the identification of correlated regions in HIV protein sequences for vaccine design. PCA validation enhances the reliability of RMT‐derived correlations, particularly in small‐sample, high‐dimensional datasets, enabling more accurate detection of ...
Mariyam Siddiqah, Muhammad Zulqarnain Zeb, Muhammad Husnain Zeb, Babar Shabbir   +3 more
wiley   +1 more source

Row stochastic inverse eigenvalue problem

Journal of Inequalities and Applications, 2011
In this paper, we give sufficient conditions or realizability criteria for the existence of a row stochastic matrix with a given spectrum Λ = {λ1, ..., λn} = Λ1 ∪ ⋯ ∪ Λm ∪ Λm+1, m > 0; where (pk ...
Chang-qing Xu, Shang-jun Yang
doaj  

A New Inverse Eigenvalue Problem for Jacobi Matrices and Corresponding Mass-Spring System

پژوهش‌های ریاضی, 2020
Introduction Many problems in sciences and engineering can be studied by mathematical models. These models are classified as direct problems and inverse problems.
Hanif Mirzaei
doaj