Results 11 to 20 of about 205,651 (167)

Damping problem for the hyperbolic equation with mixed derivative

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011
The boundary control problem for the hyperbolic equation with mixed derivative was considered in the rectangular region. The control functions were constructed in an explicit form.
Elena A Kozlova
doaj   +3 more sources

Boundary control for the processes, described by hyperbolic systems

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013
The boundary control problem for the system of hyperbolic equations with the mixed derivative is considered.The control is provided by the displacement (in the conditions of the first boundary-value problem).The coefficient matrices of different ...
Aleksandr Anatol'evich Andreev   +2 more
doaj   +1 more source

Derivation of a general mixed interpolation formula

open access: yesJournal of Computational and Applied Mathematics, 1996
The author shows that given any function \(f(x)\), \(x > 0\), there exists a unique \(g(x) = au(kx) + bv(kx) + C_0 + C_1x + \dots + C_{n-2} x^{n-2}\) that interpolates \(f\) at the points \(jh\), \(h > 0\), \(j = 0\), \(1,\dots, n\), where \(u\) and \(v\) are the two linearly independent solutions of a suitable second-order ordinary differential ...
Chakrabarti, A, Hamsapriye, *
openaire   +2 more sources

TOPOLOGICAL DERIVATIVE - THEORY AND APPLICATIONS

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2015
The paper is devoted to present some mathematical aspects of the topological derivative and its applications in different fields of sciences such as shape optimization and inverse problems.
Katarzyna Szulc
doaj   +1 more source

Cauchy problem for the hyperbolic system with mixed derivative

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012
Cauchy problem for the hyperbolic system with mixed derivative is considered. The given system is transformed to the triangular or diagonal form for the further equations separation.
E. A. Kozlova
doaj   +1 more source

Quantitative analysis of mixed pigments for Chinese paintings using the improved method of ratio spectra derivative spectrophotometry based on mode

open access: yesHeritage Science, 2020
Background Mixed pigment analysis is an important and complex subject in preserving and restoring Chinese paintings since the colors observed by our naked eyes or instruments such as hyperspectral cameras are usually a mixture of several kinds of ...
Shuqiang Lyu   +5 more
doaj   +1 more source

A Compact Numerical Scheme for the Heat Transfer of Mixed Convection Flow in Quantum Calculus

open access: yesApplied Sciences, 2022
This contribution aims to propose a compact numerical scheme to solve partial differential equations (PDEs) with q-spatial derivative terms. The numerical scheme is based on the q-Taylor series approach, and an operator is proposed, which is useful to ...
Yasir Nawaz   +2 more
doaj   +1 more source

ABOUT A PROBLEM FOR THE DEGENERATING MIXED TYPE EQUATION FRACTIONAL DERIVATIVE [PDF]

open access: yesVestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2016
The existence and the uniqueness of solution of local problem for degenerating mixed type equation is investigated. Considering parabolic-hyperbolic equation involve the Caputo fractional derivative.
Islomov B. I., Ochilova N. K.
doaj   +1 more source

Effective synthesis of menthol derivative monomenthyl succinate catalyzed by nanoscale silicon dioxide immobilized DMAP derivative in mixed solvent system

open access: yesComptes Rendus. Chimie, 2020
For the preparation of an immobilized DMAP derivative, 4-dimethyl-aminopyridine (DMAP) is covalently bonded to the surface of nanoscale silicon dioxide by N-alkylation.
Qi, Xinyu   +6 more
doaj   +1 more source

Classical solution of the initial-boundary value problem for the wave equation with mixed derivative

open access: yesСовременная математика: Фундаментальные направления
In this paper, we study the initial-boundary value problem for a second-order nonhomogeneous hyperbolic equation in a half-strip of the plane with constant coefficients, containing a mixed derivative, with zero and nonzero potentials.
V. S. Rykhlov
doaj   +1 more source

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