Positive Definite | List of Frontiers open access articles

Original Research

Published on 22 Jan 2026

Multivariate intrinsic local polynomial regression on isometric Riemannian manifolds. Applications to symmetric positive data

in Statistics and Probability

Ronald García Reyes
Ying Wang
Min Li
Giani Egaña Fernández
Ludovico Minati
Pedro Antonio Valdes Sosa

Frontiers in Applied Mathematics and Statistics

doi 10.3389/fams.2025.1690557

801 views

Original Research

Published on 01 Sep 2015

Monocular Concurrent Recovery of Structure and Motion Scene Flow

in Computer Vision

Amar Mitiche
Yosra Mathlouthi
Ismail Ben Ayed

Frontiers in ICT

doi 10.3389/fict.2015.00016

4,089 views
6 citations

Original Research

Published on 25 May 2022

A Riemannian Revisiting of Structure–Function Mapping Based on Eigenmodes

in Brain Imaging Methods

Samuel Deslauriers-Gauthier
Mauro Zucchelli
Hiba Laghrissi
Rachid Deriche

Frontiers in Neuroimaging

doi 10.3389/fnimg.2022.850266

2,457 views
8 citations

Original Research

Published on 22 Apr 2021

A New Method for Numerical Integration of Higher-Order Ordinary Differential Equations Without Losing the Periodic Responses

in Computational Methods in Structural Engineering

John T. Katsikadelis

Frontiers in Built Environment

doi 10.3389/fbuil.2021.621037

4,785 views
5 citations

Methods

Published on 02 Dec 2022

Tangent space alignment: Transfer learning for Brain-Computer Interface

in Brain-Computer Interfaces

Alexandre Bleuzé
Jérémie Mattout
Marco Congedo

Frontiers in Human Neuroscience

doi 10.3389/fnhum.2022.1049985

6,419 views
15 citations

Original Research

Published on 31 Oct 2022

Characterization of polycyclic aromatic hydrocarbons in soil in a coal mining area, East China: Spatial distribution, sources, and carcinogenic risk assessment

in Geochemistry

Mengxi Ren
Liugen Zheng
Jie Hu
Xing Chen
Yanhai Zhang
Xianglin Dong
Xiangping Wei
Hua Cheng

Frontiers in Earth Science

doi 10.3389/feart.2022.1035792

8,173 views
7 citations

Hypothesis and Theory

Published on 03 Aug 2022

SPD-CNN: A plain CNN-based model using the symmetric positive definite matrices for cross-subject EEG classification with meta-transfer-learning

Lezhi Chen
Zhuliang Yu
Jian Yang

Frontiers in Neurorobotics

doi 10.3389/fnbot.2022.958052

5,011 views
19 citations

Original Research

Published on 09 Jun 2022

High Resolution Ex Vivo Diffusion Tensor Distribution MRI of Neural Tissue

in Medical Physics and Imaging

Kulam Najmudeen Magdoom
Michal E. Komlosh
Kadharbatcha Saleem
Dario Gasbarra
Peter J. Basser

Frontiers in Physics

doi 10.3389/fphy.2022.807000

2,511 views
2 citations

Original Research

Published on 26 Nov 2019

A Data-Driven Measure of Effective Connectivity Based on Renyi's α-Entropy

in Brain Imaging Methods

Ivan De La Pava Panche
Andres M. Alvarez-Meza
Alvaro Orozco-Gutierrez

Frontiers in Neuroscience

doi 10.3389/fnins.2019.01277

6,357 views
28 citations

Original Research

Published on 15 Dec 2022

COnstrained Reference frame diffusion TEnsor Correlation Spectroscopic (CORTECS) MRI: A practical framework for high-resolution diffusion tensor distribution imaging

in Brain Imaging Methods

Alexandru V. Avram
Kadharbatcha S. Saleem
Peter J. Basser

Frontiers in Neuroscience

doi 10.3389/fnins.2022.1054509

3,355 views
7 citations

Original Research

Published on 04 Jul 2023

Spatial distribution characteristics, source analysis and risk assessment of polycyclic aromatic hydrocarbons in topsoil of a typical chemical industry park

in Interdisciplinary Climate Studies

Yongjiang Zhang
Jiawei Niu
Zejun Wei
Xunping Zhou
Lijun Wu
Xixi Li
Shuang Ma
Ge Shi

Frontiers in Environmental Science

doi 10.3389/fenvs.2023.1209137

3,637 views
5 citations

Original Research

Published on 25 Sep 2025

Characterization of heavy metal pollution in agricultural soils and the driving mechanism of nutrient factors in the intermountain basin area

in Biogeoscience

Zhengyu Yang
Zhen Song
Huanzhan Zhou
Yonghong Ma
Baili Geng
Yuan Zhao
Yuexin Xiao

Frontiers in Earth Science

doi 10.3389/feart.2025.1645105

3,018 views
1 citation

Articles

Multivariate intrinsic local polynomial regression on isometric Riemannian manifolds. Applications to symmetric positive data

Monocular Concurrent Recovery of Structure and Motion Scene Flow

A Riemannian Revisiting of Structure–Function Mapping Based on Eigenmodes

A New Method for Numerical Integration of Higher-Order Ordinary Differential Equations Without Losing the Periodic Responses

Tangent space alignment: Transfer learning for Brain-Computer Interface

Characterization of polycyclic aromatic hydrocarbons in soil in a coal mining area, East China: Spatial distribution, sources, and carcinogenic risk assessment

SPD-CNN: A plain CNN-based model using the symmetric positive definite matrices for cross-subject EEG classification with meta-transfer-learning

High Resolution Ex Vivo Diffusion Tensor Distribution MRI of Neural Tissue

A Data-Driven Measure of Effective Connectivity Based on Renyi's α-Entropy

COnstrained Reference frame diffusion TEnsor Correlation Spectroscopic (CORTECS) MRI: A practical framework for high-resolution diffusion tensor distribution imaging

Spatial distribution characteristics, source analysis and risk assessment of polycyclic aromatic hydrocarbons in topsoil of a typical chemical industry park

Characterization of heavy metal pollution in agricultural soils and the driving mechanism of nutrient factors in the intermountain basin area