Results 21 to 30 of about 721,371 (289)

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

Lithium and aluminium carbamato derivatives of the utility amide 2, 2, 6, 6- tetramethylpiperidide [PDF]

open access: yes, 2010
Insertion of CO2 into the metal-N bond of a series of synthetically-important alkali-metal TMP (2,2,6,6-tetramethylpiperidide) complexes has been studied.
Abram   +50 more
core   +1 more source

Lie symmetry analysis of (2+1)-dimensional time fractional Kadomtsev-Petviashvili equation [PDF]

open access: yesOpen Communications in Nonlinear Mathematical Physics
In this paper, Lie symmetry analysis method is applied to the (2+1)-dimensional time fractional Kadomtsev-Petviashvili (KP) equation with the mixed derivative of Riemann-Liouville time-fractional derivative and integer-order $x$-derivative.
Jicheng Yu, Yuqiang Feng
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

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

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

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

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

Higher-Derivative Terms in N=2 Supersymmetric Effective Actions

open access: yes, 2003
We show how to systematically construct higher-derivative terms in effective actions in harmonic superspace despite the infinite redundancy in their description due to the infinite number of auxiliary fields.
A. Galperin   +32 more
core   +3 more sources

Parabolic equations with dynamical boundary conditions and source terms on interfaces [PDF]

open access: yes, 2012
We consider parabolic equations with mixed boundary conditions and domain inhomogeneities supported on a lower dimensional hypersurface, enforcing a jump in the conormal derivative.
Meyries, Martin   +2 more
core   +4 more sources

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