Results 81 to 90 of about 30,552 (227)

MPHLDAE‐1DCNN: A Novel Denoising Method for Improved Fault Diagnosis

open access: yesInternational Journal of Rotating Machinery, Volume 2026, Issue 1, 2026.
Fault diagnosis of rotating machines has undergone significant advancements through the use of deep learning models. However, the effectiveness of these models is often compromised by noisy raw vibration data collected from industrial machines, which can negatively impact accuracy rates. To address this challenge, we present an improved fault diagnosis
Fasikaw Kibrete   +3 more
wiley   +1 more source

Operational Properties of SCN Function, Optimization Condition, and Exactness of Penalty Function for SCN Optimization

open access: yesJournal of Mathematics, Volume 2026, Issue 1, 2026.
This paper defines a strong convertible nonconvex (SCN) function for solving the unconstrained optimization problems with the nonconvex or nonsmooth (nondifferentiable) function. First, the concept of SCN function is defined, where the SCN functions are nonconvex or nonsmooth.
Min Jiang   +4 more
wiley   +1 more source

Minimization of nonsmooth integral functionals

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
In this paper we examine optimization problems involving multidimensional nonsmooth integral functionals defined on Sobolev spaces. We obtain necessary and sufficient conditions for optimality in convex, finite dimensional problems using techniques from ...
Nikolaos S. Papageorgiou   +1 more
doaj   +1 more source

Some Existence Theorems for Nonconvex Variational Inequalities Problems

open access: yesAbstract and Applied Analysis, 2010
By using nonsmooth analysis knowledge, we provide the conditions for existence solutions of the variational inequalities problems in nonconvex setting. We also show that the strongly monotonic assumption of the mapping may not need for the existence of ...
Narin Petrot
doaj   +1 more source

A Unified Convergence Analysis for Some Two-Point Type Methods for Nonsmooth Operators

open access: yesMathematics, 2019
The aim of this paper is the approximation of nonlinear equations using iterative methods. We present a unified convergence analysis for some two-point type methods.
Sergio Amat   +4 more
doaj   +1 more source

Variational–hemivariational system for contaminant convection–reaction–diffusion model of recovered fracturing fluid

open access: yesAdvances in Nonlinear Analysis
This work is devoted to study the convection–reaction–diffusion behavior of contaminant in the recovered fracturing fluid which flows in the wellbore from shale gas reservoir. First, we apply various constitutive laws for generalized non-Newtonian fluids,
Cen Jinxia   +3 more
doaj   +1 more source

Drag Reduction and Performance Improvement of Hydraulic Torque Converters with Multiple Biological Characteristics

open access: yesApplied Bionics and Biomechanics, 2016
Fish-like, dolphin-like, and bionic nonsmooth surfaces were employed in a hydraulic torque converter to achieve drag reduction and performance improvement, which were aimed at reducing profile loss, impacting loss and friction loss, respectively. YJSW335,
Liu Chunbao   +4 more
doaj   +1 more source

An introduction to non-smooth convex analysis via multiplicative derivative

open access: yesJournal of Taibah University for Science, 2019
In this study, *-directional derivative and *-subgradient are defined using the multiplicative derivative, making a new contribution to non-Newtonian calculus for use in non-smooth analysis.
Ali Hakan Tor
doaj   +1 more source

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