Results 71 to 80 of about 66,560 (316)

Application of a flat variational modal decomposition algorithm in fault diagnosis of rolling bearings

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2020
Fault diagnosis of rolling bearings can effectively prevent sudden accidents and is an important factor for the safe operation of mechanical systems.
Haodong Li   +5 more
doaj   +1 more source

Computation of dimensionless propagation parameters of LP11 mode of double clad fibers

open access: yesResults in Optics, 2023
A scalar variational approximation is proposed to calculate the propagation constant and the normalised dispersion parameter of LP11 mode of double clad fibers. Single and two parameter variational approximations have been proposed in this work.
Piusa Pratikshya Pradhan   +3 more
doaj   +1 more source

A Bibliometric Analysis of Publications in Uremic Toxins From 1991 to 2024

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Uremic toxins are a growing area of research in nephrology, with significant implications in the progression and treatment of chronic kidney disease (CKD) and the management of end‐stage kidney disease (ESKD). This bibliometric analysis aims to evaluate the global research trends, key contributors, and the impact of publications in ...
Yuh‐Shan Ho   +7 more
wiley   +1 more source

An Optimal Control Problem Governed by a Kirchhoff-Type Variational Inequality

open access: yesJournal of Applied Mathematics, 2020
This paper is concerned with an optimal control problem governed by a Kirchhoff-type variational inequality. The existence of multiplicity solutions for the Kirchhoff-type variational inequality is established by using some nonlinear analysis techniques ...
Chengfu Wang, Pengcheng Wu, Yuying Zhou
doaj   +1 more source

Total Differential Photometric Mesh Refinement with Self-Adapted Mesh Denoising

open access: yesPhotonics, 2022
Variational mesh refinement is a crucial step in multiview 3D reconstruction. Existing algorithms either focus on recovering mesh details or focus on suppressing noise. Approaches with consideration of both are lacking.
Yingjie Qu   +4 more
doaj   +1 more source

Serum Myonectin Levels Are Positively Associated With Physical Function and Lower Frailty‐Related Limitation in Maintenance Hemodialysis Patients: A Cross‐Sectional Study

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Maintenance hemodialysis (MHD) patients frequently suffer from frailty, characterized by reduced physical function and poor prognosis. Myokines, such as myonectin, secreted by muscle, are emerging regulators of systemic health. This study investigated the relationship between serum myonectin, adipokines (adiponectin, omentin), and ...
Kenichi Kono   +7 more
wiley   +1 more source

Sensitivity analysis and parameter estimation for distributed hydrological modeling: potential of variational methods [PDF]

open access: yes, 2009
Variational methods are widely used for the analysis and control of computationally intensive spatially distributed systems. In particular, the adjoint state method enables a very efficient calculation of the derivatives of an objective function ...
Dartus, Denis   +8 more
core   +1 more source

Numerical Solution of the Inverse Problem of Determining an Unknown Source Term in a Heat Equation

open access: yesJournal of Applied Mathematics, 2012
This paper investigates the inverse problem of determining a heat source in the parabolic heat equation using the usual conditions. Firstly, the problem is reduced to an equivalent problem which is easy to handle using variational iteration method ...
Xiuming Li, Suping Qian
doaj   +1 more source

Applications of variational methods to some three-point boundary value problems with instantaneous and noninstantaneous impulses

open access: yesNonlinear Analysis, 2022
In this paper, we study the multiple solutions for some second-order p-Laplace differential equations with three-point boundary conditions and instantaneous and noninstantaneous impulses.
Yongfang Wei   +2 more
doaj   +1 more source

THE METHOD OF SYSTEMATIC VARIATIONS

open access: yesSoil Science, 1963
info:eu-repo/semantics ...
openaire   +2 more sources

Home - About - Disclaimer - Privacy