Regularized matrix data clustering and its application to image analysis

X Gao, W Shen, L Zhang, J Hu, NJ Fortin… - …, 2021 - academic.oup.com
We propose a novel regularized mixture model for clustering matrix-valued data. The
proposed method assumes a separable covariance structure for each cluster and imposes a …

[HTML][HTML] Evolutionary state-space model and its application to time-frequency analysis of local field potentials

X Gao, W Shen, B Shahbaba, NJ Fortin… - Statistica Sinica, 2020 - ncbi.nlm.nih.gov
We propose an evolutionary state space model (E-SSM) for analyzing high dimensional
brain signals whose statistical properties evolve over the course of a non-spatial memory …

Topological data analysis for directed dependence networks of multivariate time series data

A El Yaagoubi, H Ombao - Research Papers in Statistical Inference for …, 2023 - Springer
Topological data analysis (TDA) approaches are becoming increasingly popular for studying
the dependence patterns in multivariate time series data. In particular, various dependence …

Nonlinear Causality in Brain Networks: With Application to Motor Imagery vs Execution

S Aslan, H Ombao - arXiv preprint arXiv:2409.10374, 2024 - arxiv.org
One fundamental challenge of data-driven analysis in neuroscience is modeling causal
interactions and exploring the connectivity between nodes in a brain network. Various …

Change-point detection using spectral PCA for multivariate time series

S Jiao, T Shen, Z Yu, H Ombao - arXiv preprint arXiv:2101.04334, 2021 - arxiv.org
We propose a two-stage approach Spec PC-CP to identify change points in multivariate time
series. In the first stage, we obtain a low-dimensional summary of the high-dimensional time …

A Practical Approach for Exploring Granger Connectivity in High-Dimensional Networks of Time Series

S Aslan, H Ombao - arXiv preprint arXiv:2406.02360, 2024 - arxiv.org
This manuscript presents a novel method for discovering effective connectivity between
specified pairs of nodes in a high-dimensional network of time series. To accurately perform …

Modeling and Simulating Dependence in Networks Using Topological Data Analysis

AEY Bourakna, MK Chung, H Ombao - arXiv preprint arXiv:2209.10416, 2022 - arxiv.org
Topological data analysis (TDA) approaches are becoming increasingly popular for studying
the dependence patterns in multivariate time series data. In particular, various dependence …

[图书][B] Statistical Inference of Change Points and Its Applications in Neuroscience Research

T Shen - 2021 - search.proquest.com
Change point detection is a critical analysis in various scientific fields such as finance,
medicine, and climatology. Despite the recent developments in methods and algorithms, it …

[PDF][PDF] Effects of Pharmacotherapy, Neurodevelopment, Sex and Structural Asymmetry on Regional Intrinsic Homotopic Connectivity in Youths with Attention Deficit …

Z Homoud - 2021 - repository.kaust.edu.sa
Functional magnetic resonance imaging studies have long demonstrated a high degree of
correlated activity between the left and right hemispheres of the brain. Interregional …

[PDF][PDF] OBSERVACIÓN Y CÁLCULO EN ESTADÍSTICA CON DATOS MASIVOS

FYN EXACTAS, DE ESPAÑA - rac.es
Medir es comparar con un patrón, o clasificar en una escala, la magnitud de una
observación. Permite calibrar la importancia de un fenómeno y transmitirlo con exactitud …