Results 71 to 80 of about 13,124,526 (179)

Two-parameter nonsmooth grazing bifurcations of limit cycles: classification and open problems [PDF]

open access: yes, 2005
This paper proposes a strategy for the classification of codimension-two grazing bifurcations of limit cycles in piecewise smooth systems of ordinary differential equations.
Homer, ME   +7 more
core  

Structural Feature Selection in Common Spatial Patterns Using Adaptive Sparse Group Lasso

open access: yesCAAI Transactions on Intelligence Technology, Volume 11, Issue 2, Page 367-384, April 2026.
ABSTRACT With the advancement of brain–computer interfaces (BCI), motor imagery (MI) electroencephalogram (EEG) decoding can greatly benefit from spatial filtering features derived from common spatial patterns (CSP). However, CSP‐based features often exhibit high redundancy and intersubject variability.
Yadi Wang   +4 more
wiley   +1 more source

A Formation Inversion Algorithm Based on Collaborative Fuzzy Gradient Neural Dynamics for Natural Gamma Logging While Drilling

open access: yesCAAI Transactions on Intelligence Technology, Volume 11, Issue 2, Page 498-513, April 2026.
ABSTRACT A formation inversion algorithm with real‐time performance and accuracy is crucial for natural gamma logging while drilling (LWD). However, traditional inversion algorithms are often limited by high computational resource consumption and insufficient accuracy.
Juntao Liu   +4 more
wiley   +1 more source

Existence of solutions and of multiple solutions for nonlinear nonsmooth periodic systems [PDF]

open access: yes, 1991
summary:In this paper we examine nonlinear periodic systems driven by the vectorial $p$-Laplacian and with a nondifferentiable, locally Lipschitz nonlinearity.
Papageorgiou, EH   +7 more
core   +1 more source

Lagrangian systems with Lipschitz obstacle on manifolds [PDF]

open access: yes, 2006
Lagrangian systems constrained on the closure of an open subset with Lipschitz boundary in a manifold are considered.
Lancelotti, Sergio   +3 more
core  

General equilibrium and fixed point theory : a partial survey [PDF]

open access: yes
Focusing mainly on equilibrium existence results, this paper emphasizes the role of fixed point theorems in the development of general equilibrium theory, as well for its standard definition as for some of its extensions.Fixed point, equilibrium ...
Monique Florenzano   +2 more
core  

Sign-Changing Solutions for Nonlinear Elliptic Problems Depending on Parameters

open access: yesInternational Journal of Differential Equations, 2010
The study of multiple solutions for quasilinear elliptic problems under Dirichlet or nonlinear Neumann type boundary conditions has received much attention over the last decades.
Siegfried Carl, Dumitru Motreanu
doaj   +1 more source

Mathematical properties of a delamination model

open access: yes, 1998
In this paper, some mathematical properties of a delamination model are studied. The laminate is schematized as two plates connected by a very special interface material. An interface constitutive model, based on the adhesion theory is introduced.
SACCO E., POINT N.
core   +1 more source

Existence and multiplicity of solutions for the noncoercive Neumann p-Laplacian

open access: yesElectronic Journal of Differential Equations, 2010
We consider a nonlinear Neumann problem driven by the p-Laplacian differential operator with a nonsmooth potential (hemivariational inequality). Using variational techniques based on the smooth critical point theory and the second deformation theorem,
Nikolaos S. Papageorgiou   +1 more
doaj  

Three nontrivial solutions for nonlocal anisotropic inclusions under nonresonance

open access: yesElectronic Journal of Differential Equations, 2019
In this article, we study a pseudo-differential inclusion driven by a nonlocal anisotropic operator and a Clarke generalized subdifferential of a nonsmooth potential, which satisfies nonresonance conditions both at the origin and at infinity. We prove
Silvia Frassu   +2 more
doaj  

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