Results 11 to 20 of about 421,084 (235)

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

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

Two-point boundary value problems for linear evolution equations [PDF]

open access: yes, 2001
We study boundary value problems for a linear evolution equation with spatial derivatives of arbitrary order, on the domain 0 < x < L, 0 < t < T, with L and T positive nite constants.
Fokas, A. S., Pelloni, B.
core   +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

Riemann-Hilbert problems for monogenic functions in axially symmetric domains [PDF]

open access: yes, 2016
We consider Riemann-Hilbert boundary value problems (for short RHBVPs) with variable coefficients for axially symmetric monogenic functions defined in axial symmetric domains.
AS Fokas   +32 more
core   +2 more sources

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

Boundary element method application to numerical solving of linear boundary-value problems in domains with strongly segmented boundary [PDF]

open access: yes, 2019
В настоящей работе метод граничных элементов был применен к решению краевых задач для уравнения Лапласа в плоской области с сильно сегментированной границей. Особое внимание было уделено точности численного решения, которая исследовалась путем численного
Бразалук, Юлия Владимировна
core   +3 more sources

Stress fields around two pores in an elastic body: exact quadrature domain solutions [PDF]

open access: yes, 2015
Analytical solutions are given for the stress fields, in both compression and far-field shear, in a two-dimensional elastic body containing two interacting non-circular pores.
Crowdy, DG
core   +1 more source

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