Results 11 to 20 of about 22,155 (286)

Electromagnetic diffraction and scattering of a complex-source beam by a semi-infinite circular cone [PDF]

open access: yesAdvances in Radio Science, 2013
A complex-source beam (CSB) is used to investigate the electromagnetic scattering and diffraction by the tip of a perfectly conducting semi-infinite circular cone.
H. Brüns, L. Klinkenbusch
doaj   +1 more source

Transverse Resonance Technique for Analysis of Symmetrical Stub in Microstrip Transmission Line

open access: yesVìsnik Nacìonalʹnogo Tehnìčnogo Unìversitetu Ukraïni Kììvsʹkij Polìtehnìčnij Ìnstitut: Serìâ Radìotehnìka, Radìoaparatobuduvannâ, 2023
Open or short-circuit stubs in a strip (microstrip) transmission line are one of the most common elements of planar circuits used in numerous devices in the microwave frequency range: various types of filters, couplers, power amplifiers, antennas ...
Yu. V. Rassokhina, V. G. Krizhanovski
doaj   +1 more source

Determinism, well-posedness, and applications of the ultrahyperbolic wave equation in spacekime

open access: yesPartial Differential Equations in Applied Mathematics, 2022
Spatiotemporal dynamics of many natural processes, such as elasticity, heat propagation, sound waves, and fluid flows are often modeled using partial differential equations (PDEs).
Yuxin Wang   +3 more
doaj   +1 more source

Asymptotically accurate error estimates of exponential convergence for the trapezoidal rule

open access: yesDiscrete and Continuous Models and Applied Computational Science, 2021
In many applied problems, efficient calculation of quadratures with high accuracy is required. The examples are: calculation of special functions of mathematical physics, calculation of Fourier coefficients of a given function, Fourier and Laplace ...
Aleksandr A. Belov   +1 more
doaj   +1 more source

Initial-boundary value problems for the two-component complex modified Korteweg-de Vries equation on the interval

open access: yesDiscrete and Continuous Dynamical Systems. Series A, 2022
We apply the Fokas unified method to study initial-boundary value (IBV) problems for the two-component complex modified Korteweg-de Vries (mKdV) equation with a \begin{document}$ 4\times 4 $\end{document} Lax pair on the interval.
Rusuo Ye, Yi Zhang
semanticscholar   +1 more source

COMPLEX BOUNDARY VALUE PROBLEMS FOR THE CAUCHY–RIEMANN OPERATOR ON A TRIANGLE

open access: yesFractals, 2022
There are three over-determined boundary value problems for the inhomogeneous Cauchy–Riemann equation, the Dirichlet problem, the Neumann problem and the Robin problem.
Mohamed S. Akel   +2 more
semanticscholar   +1 more source

Plane problem of discrete environment mechanics

open access: yesПроблеми трибології, 2022
Many engineering problems related to the design of structures and machines, the mathematical description of technological processes, etc., are reduced to the need to solve a plane problem for materials with a significant effect of internal friction on ...
O.V. Bagrii
doaj   +1 more source

On eigenvalues of third order composite type equations with regular boundary value conditions

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2019
In the paper the question about distribution of eigenvalues of third - order composite type equations with regular, more precisely, with periodic boundary value conditions is studied.
N.S. Imanbaev, M.N. Ospanov
doaj   +1 more source

Eigenvalue enclosures and exclosures for non-self-adjoint problems in hydrodynamics [PDF]

open access: yes, 2010
In this paper we present computer-assisted proofs of a number of results in theoretical fluid dynamics and in quantum mechanics. An algorithm based on interval arithmetic yields provably correct eigenvalue enclosures and exclosures for non-self-adjoint ...
Langer, M.   +10 more
core   +1 more source

Elastic Equilibrium of Porous Cosserat Media with Double Porosity

open access: yesAdvances in Mathematical Physics, 2016
The static equilibrium of porous elastic materials with double porosity is considered in the case of an elastic Cosserat medium. The corresponding three-dimensional system of differential equations is derived.
Roman Janjgava
doaj   +1 more source

Home - About - Disclaimer - Privacy