Results 11 to 20 of about 3,081,381 (296)

Inverse Problem of Recovering the Initial Condition for a Nonlinear Equation of the Reaction–Diffusion–Advection Type by Data Given on the Position of a Reaction Front with a Time Delay

open access: yesMathematics, 2021
In this paper, approaches to the numerical recovering of the initial condition in the inverse problem for a nonlinear singularly perturbed reaction–diffusion–advection equation are considered.
Dmitry Lukyanenko   +5 more
doaj   +1 more source

Positive Solutions of an Initial Value Problem for Nonlinear Fractional Differential Equations [PDF]

open access: yesAbstract and Applied Analysis, 2012
We investigate the existence and multiplicity of positive solutions for the nonlinear fractional differential equation initial value problem u(0) = 0, 0 < t < 1, where is the standard Riemann‐Liouville differentiation and f : [0,1] × [0, ∞) → [0, ∞) is continuous.
Dumitru Băleanu   +2 more
openaire   +4 more sources

A Novel Adaptive Fractional Differential Active Contour Image Segmentation Method

open access: yesFractal and Fractional, 2022
When the image is affected by strong noise and uneven intensity, the traditional active contour models often cannot obtain accurate results. In this paper, a novel adaptive fractional differential active contour image segmentation method is proposed to ...
Yanzhu Zhang, Lijun Yang, Yan Li
doaj   +1 more source

A characteristic initial boundary value problem for a symmetric positive system [PDF]

open access: yesHokkaido Mathematical Journal, 1996
Let \(\Omega\) be a bounded open subset of \(\mathbb{R}^n\) with smooth boundary \(\partial\Omega\). In \(\Omega\) the authors consider a first-order symmetric system \[ L[u]= \sum^n_{j= 1} A_j(x) \partial_j u+ B(x) u, \] \(A_j(x)\), \(B(x)\in C^\infty(\overline\Omega)\), \(A^*_j(x)= A_j(x)\) with \(u= (u_1,\dots, u_N)\) and \(\partial_j= {\partial ...
NISHITANI, Tatsuo, TAKAYAMA, Masahiro
openaire   +3 more sources

Analysing an Interactive Problem-Solving Task Through the Lens of Double Stimulation

open access: yesCanadian Journal of Learning and Technology, 2022
Problem-solving activities have been studied from a diversity of epistemological perspectives. In problem-solving activities, the initial tensions of a problematic situation led to a cognitive dissonance between conflicting motives and instruments to ...
Margarida Romero, Sylvie Barma
doaj   +1 more source

Adaptive Synthesized Control for Solving the Optimal Control Problem

open access: yesMathematics, 2023
The development of artificial intelligence systems assumes that a machine can independently generate an algorithm of actions or a control system to solve the tasks.
Askhat Diveev, Elizaveta Shmalko
doaj   +1 more source

Positive Solutions of Singular Initial-Boundary Value Problems to Second-Order Functional Differential Equations [PDF]

open access: yesBoundary Value Problems, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jin Fengfei, Yan Baoqiang
openaire   +4 more sources

Perceived risk, Positive Youth–Parent Relationships, and Internalizing Problems in Adolescents: Initial Development of the Meaningful School Questionnaire [PDF]

open access: yesChild Indicators Research, 2021
This novel paper aimed to develop the Meaningful School Questionnaire (MSQ) to assess meaning in life in school context and examined whether meaningful school serves as a moderator on the links between the coronavirus risk, youth-parent relationships, and internalizing problems.
Gökmen Arslan, Murat Yıldırım
openaire   +4 more sources

On the zero-dispersion limit of the benjamin-ono cauchy problem for positive initial data [PDF]

open access: yesCommunications on Pure and Applied Mathematics, 2010
54 pages, 11 ...
Miller, Peter D., Xu, Zhengjie
openaire   +4 more sources

Error-Tracking Iterative Learning Control for Nonlinearly Parametric Time-Delay Systems With Initial State Errors

open access: yesIEEE Access, 2018
In this paper, an error-tracking iterative learning control scheme is proposed for a class of nonlinearly parametric time-delay systems with initial state errors. The iterative learning controller is developed by Lyapunov approach.
Qiuzhen Yan   +3 more
doaj   +1 more source

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