Results 131 to 140 of about 294,893 (309)

A Fixed Point Theorem for Monotone Maps and Its Applications to Nonlinear Matrix Equations

Journal of Mathematics, 2015
By using the fixed point theorem for monotone maps in a normal cone, we prove a uniqueness theorem for the positive definite solution of the matrix equation X=Q+A⁎f(X)A, where f is a monotone map on the set of positive definite matrices.
Dongjie Gao
doaj   +1 more source

Generalized diagonals in positive semi-definite matrices

European Journal of Combinatorics
7 pages; fixed minor typos for ...
Angarone, Robert, Soskin, Daniel
openaire   +3 more sources

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source

Test matrices with specified eigenpairs for the symmetric positive definite generalized eigenvalue problem

Special Matrices
The generalized eigenvalue problem is a significant topic with numerous applications in scientific and technological computing. Therefore, verifying the reliability of the results produced by numerical solvers is crucial.
Ozaki Katsuhisa, Terao Takeshi
doaj   +1 more source

The in‐hospital administration of sacubitril/valsartan in acute myocardial infarction: A meta‐analysis

ESC Heart Failure, Volume 12, Issue 2, Page 998-1012, April 2025.
In patients with Acute Myocardial Infarction related heart failure, the in‐hospital administration of ARNIs was associated with a reduced risk of MACEs and re‐hospitalizations for heart failure, as well as cardiac remodeling, compared to standard therapy.
Gianluca Di Pietro, Riccardo Improta, Paolo Severino, Andrea D'Amato, Lucia Ilaria Birtolo, Ovidio De Filippo, Antonio Lattanzio, Raffaele De Cristofaro, Giacchino Galardo, Fabrizio D'Ascenzo, Roberto Badagliacca, Gennaro Sardella, Maurizio Volterrani, Francesco Fedele, Carmine Dario Vizza, Massimo Mancone   +15 more
wiley   +1 more source

Traditional models chemical kinetics and potentially streaming equation for a closed system

Тонкие химические технологии, 2014
The paper analyzes the communication matrix coefficients reagiruemostey simple subsystems and the coefficient matrix formed independent subsystems simple reagents chemically reacting systems with chemical kinetics.
V. I. Bykov, I. E. Starostin
doaj  

A New Version of the Accelerated Overrelaxation Iterative Method

Journal of Applied Mathematics, 2014
Hadjidimos (1978) proposed a classical accelerated overrelaxation (AOR) iterative method to solve the system of linear equations, and discussed its convergence under the conditions that the coefficient matrices are irreducible diagonal dominant, L ...
Shi-Liang Wu, Yu-Jun Liu
doaj   +1 more source

The Impact of Renewable and Non‐Renewable Energy on Economic Growth: Evidence From Sub‐Saharan African Countries Using Multivariate Panel Vector Autoregressive Modeling

Energy Science &Engineering, EarlyView.
This study analyzes energy consumption and economic growth across 39 Sub‐Saharan African countries using a PVAR model. Findings reveal that non‐renewable energy and labor force growth stimulate economic growth, while renewable energy does not stimulate economic growth in the short run.
Amadou Cham, Nana Kena Frempong, Richard Opoku, Francis Davis, Simon Kojo Appiah   +4 more
wiley   +1 more source

An Algorithm for Computing Geometric Mean of Two Hermitian Positive Definite Matrices via Matrix Sign

Abstract and Applied Analysis, 2014
Using the relation between a principal matrix square root and its inverse with the geometric mean, we present a fast algorithm for computing the geometric mean of two Hermitian positive definite matrices.
F. Soleymani, M. Sharifi, S. Shateyi, F. Khaksar Haghani   +3 more
doaj   +1 more source

A Closed‐Loop Human Resource Management Framework for Energy Efficiency: Integrating Predictive Optimization With Behavioral Implementation

Energy Science &Engineering, EarlyView.
The proposed framework operates as a continuous cycle: organizational data streams feed into predictive optimization, which generates energy efficiency targets. These targets are translated into behavioral directives through human resource management mechanisms.
Huang Juan, Aimi Binti Anuar
wiley   +1 more source