Results 21 to 30 of about 746,895 (338)
Existence of mild solutions for nonlocal perturbed evolution equations with infinite state-dependent delay in Fréchet spaces [PDF]
Archives of Control SciencesIn this work, we give sufficient conditions to get the existence of mild solutions for two classes of first-order semilinear functional and neutral functional perturbed evolution equations with infinite state-dependent delay when the conditions are ...
Selma Baghli-Bendimerad, Imane Abibssi
doaj +1 more source
Using Johnson Schumacher Model for Parameter Estimation of Nonlinear Regression Model [PDF]
Maǧallaẗ Al-Buḥūṯ Al-Mālīyyaẗ wa Al-Tiğāriyyaẗ, 2022 In this study, we aim to estimate parameters of nonlinear model by using ordinary least square. This paper used a real data set on exchange rate, inflation, exports, imports, investments, and budget deficit.
maie kamel +3 more
doaj +1 more source
Nonlocal controllability of mild solutions for neutral evolution equations with state-dependent delay in Fréchet spaces [PDF]
Archives of Control SciencesIn this paper, we prove the controllability of mild solutions of neutral functional evolution equations with state-dependent delay and nonlocal conditions. We establish the non local controllability of mild solutions under certain conditions by combining
Chahrazed Boudefla +1 more
doaj +1 more source
Cubo, 2021 In this paper, existence and uniqueness results are established for a nonlinear sequential Hadamard fractional differential equation with multi-point boundary conditions, via Banach and Krasnosel'skiǐ's fixed point theorems and Leray-Schauder nonlinear ...
Bashir Ahmad +3 more
doaj +1 more source
Alternative structured spectral gradient algorithms for solving nonlinear least-squares problems
Heliyon, 2021 The study of efficient iterative algorithms for addressing nonlinear least-squares (NLS) problems is of great importance. The NLS problems, which belong to a special class of unconstrained optimization problems, are of particular interest because of the ...
Mahmoud Muhammad Yahaya +3 more
doaj +1 more source
Nonlinear Alternating Current Responses of Electrorheological Solids [PDF]
The Journal of Physical Chemistry B, 2005 19 pages, 3 figures. Accepted for publication in J. Phys.
openaire +4 more sources
Nonlinear Alternative: Application to an Integral Equation [PDF]
Journal of Applied Analysis, 1999 Using the nonlinear alternative for compact mappings it is shown that the nonlinear integral equation \[ u^2(t)=L(t)+\int^1_0K(t-s)u(s)ds(t\geq 0)\tag{1} \] has a nonnegative solution defined on \(\mathbb{R}_+\). The equation (1) is connected with modeling of infiltration of a fluid in an isotropic homogeneous porous medium.
openaire +3 more sources
Nonlinearity Measurements Using Alternating Current
Active and Passive Electronic Components, 1978 The nonlinearity measurement technique described uses an adapted conventional lock‐in‐amplifier. This technique enables us to measure small nonlinearities over a wide frequency band and is more sensitive than the 1/f noise measurement used to detect non‐homogeneous structures in conductors, resistors and semiconductor components.
Carlo Corsi +2 more
openaire +2 more sources
Boundary Value Problems, 2008 We establish the existence of multiple positive solutions for a singular nonlinear third-order periodic boundary value problem. We are mainly interested in the semipositone case.
Yigang Sun
doaj +2 more sources
Vacuum fluctuations in the presence of nonlinear boundary conditions [PDF]
, 2014 We consider a system consisting of a quantum, massless, real scalar field, in the presence of nonlinear mirrors: infinite parallel planes, upon which the field satisfies nonlinear boundary conditions.
Fosco, C. D., Oxman, L. E.
core +2 more sources