نتایج جستجو برای: kirchhoff integral

تعداد نتایج: 117367  

In this paper, the vibrations of thin plate in modified couple stress thermoelastic medium by using Kirchhoff- Love plate theory has been investigated. The governing equations of motion and heat conduction equation for Lord Shulman (L-S) [1] theory are written with the help of Kirchhoff- Love plate theory. The thermoelastic damping of micro-beam resonators is analyzed by using the normal mode a...

Journal: :Science China Physics, Mechanics & Astronomy 2022

The increase in gravitational wave (GW) events has allowed receiving strong lensing image pairs of GWs. However, the effect (diffraction and interference) due to microlens field contaminates parameter estimation pair, which may lead a misjudgment signals. To quantify influence field, researchers need large sample statistical research. Nevertheless, oscillation characteristic, Fresnel-Kirchhoff ...

2014
Zhanping Liang Fuyi Li Junping Shi

Existence and bifurcation of positive solutions to a Kirchhoff type equation ⎧⎪⎨ ⎪⎩ − ( a + b ∫ Ω |∇u|2 ) u= νf (x,u), in Ω, u= 0, on ∂Ω are considered by using topological degree argument and variational method. Here f is a continuous function which is asymptotically linear at zero and is asymptotically 3-linear at infinity. The new results fill in a gap of recent research about the Kirchhoff ...

2010
Hongzhuan Wang Hongbo Hua Dongdong Wang

Resistance distance was introduced by Klein and Randić. The Kirchhoff index Kf(G) of a graph G is the sum of resistance distances between all pairs of vertices. A graph G is called a cactus if each block of G is either an edge or a cycle. Denote by Cat(n; t) the set of connected cacti possessing n vertices and t cycles. In this paper, we give the first three smallest Kirchhoff indices among gra...

2008
Heiko Berninger

Simulations of saturated-unsaturated groundwater flow in heterogeneous soil can be carried out by considering non-overlapping domain decomposition problems for the Richards equation in subdomains with homogeneous soil. By the application of different Kirchhoff transformations in the different subdomains local convex minimization problems can be obtained which are coupled via superposition opera...

Journal: :SIAM J. Numerical Analysis 2017
Susanne C. Brenner Joscha Gedicke Li-Yeng Sung Yi Zhang

We develop an a posteriori analysis of C interior penalty methods for the displacement obstacle problem of clamped Kirchhoff plates. We show that a residual based error estimator originally designed for C interior penalty methods for the boundary value problem of clamped Kirchhoff plates can also be used for the obstacle problem. We obtain reliability and efficiency estimates for the error esti...

2008
Konstantin Pankrashkin KONSTANTIN PANKRASHKIN

We show the presence of a dense pure point spectrum on quantum graphs with Maryland-type quasiperiodic Kirchhoff coupling constants at the vertices.

Journal: :Photonics 2021

We discuss the nonparaxial focusing of laser light into a three-dimensional (3D) spiral distribution. For calculating tangential and normal components electromagnetic field on preset curved surface we propose an asymptotic method, using which derive equations for stationary points relations in form one-dimensional (1D) integrals over radial component. The results obtained through approach direc...

1999
Robert G. Clapp Sergey Fomel Marie Prucha

We apply iterative resolution estimation to least-squares Kirchhoff migration. Resolution plots reveal low illumination areas on seismic images and provide information about image uncertainties.

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