Results 21 to 30 of about 18,411,452 (302)

Nonnegative solutions for a system of impulsive BVPs with nonlinear nonlocal BCs [PDF]

open access: yes, 2014
We study the existence of nonnegative solutions for a system of impulsive differential equations subject to nonlinear, nonlocal boundary conditions. The system presents a coupling in the differential equation and in the boundary conditions. The main
Pietramala, Paolamaria, Infante, Gennaro
core   +1 more source

Simple Sliding Mode Controller with Adaptive Fuzzy Saturation Function for Nonlinear Single Input-Single Output System [PDF]

open access: yesEngineering and Technology Journal, 2010
Sliding mode control algorithm that uses fuzzy saturation function is designed inthis paper for nonlinear system. The fuzzy saturation function is suggested to improvethe accuracy and the robustness of the sliding mode control which are partially ...
Hanady A. Jaber   +2 more
doaj   +1 more source

Adaptive control of a nonlinear aeroelastic system [PDF]

open access: yes, 2011
Aeroelastic two-dimensional wing section with both trailing-edge (TE) and leading-edge (LE) was investigated in this paper through numerical simulation in time domain.
Shijun Guo   +5 more
core   +1 more source

On a Nonlinear System of Reaction-Diffusion Equations [PDF]

open access: yes, 2006
The aim of this article is to study the existence of positive weak solution for a quasilinear reaction-diffusion system with Dirichlet boundary conditions,− div(|∇u1|p1−2∇u1) = λu1α11u2α12...
Rasouli, S. H., Afrouzi, G. A.
core   +1 more source

Parametric Characteristics and Bifurcation Analysis of Multi-Degree-of-Freedom Micro Gyroscope with Drive Stiffness Nonlinearity

open access: yesMicromachines, 2019
The dynamic equations of a four-degree-of-freedom micro gyroscope system were developed considering the nonlinearity of driving stiffness, the primary resonance, and the 1:1 internal resonance.
Mingjiang Han   +3 more
doaj   +1 more source

Improving 3D Path Tracking of Unmanned Aerial Vehicles through Optimization of Compensated PD and PID Controllers

open access: yesApplied Sciences, 2021
The development of quadrotor unmanned aerial vehicles (QUAVs) is a growing field due to their wide range of applications. QUAVs are complex nonlinear systems with a chaotic nature that require a controller with extended dynamics.
Nadia Samantha Zuñiga-Peña   +4 more
doaj   +1 more source

Study on a class of Schrödinger elliptic system involving a nonlinear operator [PDF]

open access: yes, 2020
This paper considers a class of Schrödinger elliptic system involving a nonlinear operator. Firstly, under the simple condition on and \u27, we prove the existence of the entire positive bounded radial solutions.
Zhang, Lihong   +3 more
core   +1 more source

Phase of Nonlinear Systems

open access: yesCoRR, 2020
In this paper, we propose a definition of phase for a class of stable nonlinear systems called semi-sectorial systems, from an input-output perspective. The definition involves the Hilbert transform as a critical instrument to complexify real-valued signals since the notion of phase arises most naturally in the complex domain.
Chao Chen 0043   +4 more
openaire   +2 more sources

CRE Solvability, Exact Soliton-Cnoidal Wave Interaction Solutions, and Nonlocal Symmetry for the Modified Boussinesq Equation

open access: yesAdvances in Mathematical Physics, 2016
It is proved that the modified Boussinesq equation is consistent Riccati expansion (CRE) solvable; two types of special soliton-cnoidal wave interaction solution of the equation are explicitly given, which is difficult to be found by other traditional ...
Wenguang Cheng, Biao Li
doaj   +1 more source

Existence and uniqueness of solutions for a singular system of higher-order nonlinear fractional differential equations with integral boundary conditions [PDF]

open access: yes, 2013
In this paper, we study the existence and uniqueness of solutions for a singular system of nonlinear fractional differential equations with integral boundary conditions.
Lu, Xinyi, Wang, Lin, Zhang, Xingqiu
core   +1 more source

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