Results 21 to 30 of about 314,969 (268)

Determination of Optimal Diffusion Coefficients in Lake Zirahuén through a Local Inverse Problem

Mathematics, 2021
In this study, optimal diffusion coefficients for Lake Zirahuén, Mexico, were found under particular conditions based on images taken with a drone of a dye release experiment.
Tzitlali Gasca-Ortiz, Francisco J. Domínguez-Mota, Diego A. Pantoja   +2 more
doaj   +1 more source

On Optimal Control Problem in Coefficients for Nonlinear Elliptic Variational Inequalities

Vìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Modelûvannâ, 2011
In this paper we study an optimal control problem for a nonlinear elliptic variational inequality with generalized solenoidal coefficients which we adopt as controls in L°°(fi). We prove the existence of optimal solution of the stated problem.
O. P. Kogut
doaj   +1 more source

Modification of Roughness Coefficients of Water Distribution Network Using Optimization Method [PDF]

رویکردهای نوین در مهندسی عمران, 2018
Due to the breadth and complexity of water distribution networks, modeling of these networks is essential for proper utilization and proper network management. Determination of network coefficients is the more importance in network modeling.
Hamid Azarvash, Mehdi Dini
doaj   +1 more source

Weighted Optimal Quadrature Formulas in Sobolev Space and Their Applications

Algorithms
The optimization of computational algorithms is one of the main problems of computational mathematics. This optimization is well demonstrated by the example of the theory of quadrature and cubature formulas.
Kholmat Shadimetov, Khojiakbar Usmanov
doaj   +1 more source

Optimal Control Systems by Time-Dependent Coefficients Using CAS Wavelets

Journal of Applied Mathematics, 2009
This paper considers the problem of controlling the solution of an initial boundary-value problem for a wave equation with time-dependent sound speed. The control problem is to determine the optimal sound speed function which damps the vibration of the ...
Taher Abualrub, Ibrahim Sadek, Marwan Abukhaled   +2 more
doaj   +1 more source

Identification Problem for Nonlinear Gao Beam

Mathematics, 2020
This paper deals with the identification of coefficients in the nonlinear beam model which was first introduced by D. Y. Gao in 1996. For the identification of coefficients, an optimal control approach is used.
Jana Radová, Jitka Machalová, Jana Burkotová   +2 more
doaj   +1 more source

QoS Routing in Telecommunications Networks

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2022
With the increasing demand for quality of service (QoS) in today's multiservice networks, more and more attention is paid to the routing facilities. With the transition to new generation networks, the issues of improving routing algorithms and protocols ...
N. I. Listopad, O. A. Lavshuk
doaj   +1 more source

Calculation of Coefficients of the Optimal Quadrature Formulas in ${\mathit{W}}_2^{(7,0)}$ Space

Axioms
In this paper, we construct an optimal quadrature formula in the sense of Sard by Sobolev’s method in the W2(7,0) space. We give explicit expressions for the corresponding optimal coefficients.
Ying Yang, Xuehua Li
doaj   +1 more source

Optimizing the Coefficients of Numerical Differentiation Formulae Using Neural Networks

IEEE Access, 2021
The use of a numerical differentiation formula (NDF) is an excellent method for solving stiff ordinary differential equations. However, the NDF method cannot fully adapt to all stiff systems.
Xinyu Yang, Lei Zhang, Yuan Yuan, Zhiqi Zhao   +3 more
doaj   +1 more source

Recursive utility optimization with concave coefficients

Mathematical Control and Related Fields, 2018
This paper concerns the recursive utility maximization problem. We assume that the coefficients of the wealth equation and the recursive utility are concave. Then some interesting and important cases with nonlinear and nonsmooth coefficients satisfy our assumption.
Ji, Shaolin, Shi, Xiaomin
openaire   +3 more sources