A CLT for the LSS of large-dimensional sample covariance matrices with diverging spikes

Z Liu, J Hu, Z Bai, H Song - The Annals of Statistics, 2023 - projecteuclid.org
A CLT for the LSS of large-dimensional sample covariance matrices with diverging spikes
Page 1 The Annals of Statistics 2023, Vol. 51, No. 5, 2246–2271 https://doi.org/10.1214/23-AOS2333 …

An F-ratio-based method for estimating the number of active sources in MEG

A Giri, JC Mosher, A Adler, D Pantazis - Frontiers in Human …, 2023 - frontiersin.org
Introduction Magnetoencephalography (MEG) is a powerful technique for studying the
human brain function. However, accurately estimating the number of sources that contribute …

Source number of single-channel signals intelligent estimation via signal reconstruction

Y Zhang, Y Gao - Digital Signal Processing, 2023 - Elsevier
As wireless communication advances, the spectrum is becoming more crowded and
overlapping, making it essential to determine the number of signal sources based on the …

A new second-order dynamical method for solving linear inverse problems in Hilbert spaces

Q Huang, R Gong, Y Zhang - Applied Mathematics and Computation, 2024 - Elsevier
A new second-order dynamic method (SODM) is proposed for solving ill-posed linear
inverse problems in Hilbert spaces. The SODM can be viewed as a combination of Tikhonov …

Damped dynamical systems for solving equations and optimization problems

M Gulliksson, M Ögren, A Oleynik, Y Zhang - … of the Mathematics of the Arts …, 2021 - Springer
We present an approach for solving optimization problems with or without constrains which
we call Dynamical Functional Particle Method (DFMP). The method consists of formulating …

A CLT for the LSS of large dimensional sample covariance matrices with unbounded dispersions

Z Liu, J Hu, Z Bai, H Song - arXiv preprint arXiv:2205.07280, 2022 - arxiv.org
In this paper, we establish the central limit theorem (CLT) for linear spectral statistics (LSS)
of large-dimensional sample covariance matrix when the population covariance matrices …

A coupled complex boundary expanding compacts method for inverse source problems

Y Zhang, R Gong, M Gulliksson… - Journal of Inverse and Ill …, 2019 - degruyter.com
In this paper, we consider an inverse source problem for elliptic partial differential equations
with both Dirichlet and Neumann boundary conditions. The unknown source term is to be …

Quantifying time-varying sources in magnetoencephalography—A discrete approach

Z Yao, Z Fan, M Hayashi, WF Eddy - 2020 - projecteuclid.org
Quantifying time-varying sources in magnetoencephalography-A discrete approach Page 1 The
Annals of Applied Statistics 2020, Vol. 14, No. 3, 1379–1408 https://doi.org/10.1214/19-AOAS1321 …

SUPPLEMENTARY MATERIALS: QUANTIFYING TIME-VARYING SOURCES IN MAGNETOENCEPHALOGRAPHY–A DISCRETE APPROACH

Z YAO, Z FAN, M Hayashi, WF Eddy - projecteuclid.org
1. Illustration of the Switch Procedure. In Section 2.4 of Yao et al.(2018a), the switch
procedure was proposed to reduce the computational complexity of calculating the discrete …

Depth-invariant beamforming for functional connectivity with MEG data

J Zhang - Statistics and Its Interface, 2022 - kar.kent.ac.uk
The conventional beamformers that reconstruct the cerebral origin of brain activity measured
outside the head via electro-and magnetoencephalography (EEG/MEG) suffer from depth …