Impedance boundary
RCS Reduction of Cylindrical Structure Using Mixed-Impedance Boundary Conditions
... various boundary conditions are investigated ...of boundary conditions called Mixed-Impedance boundary ...MI boundary conditions could result in significant backward RCS reduction for ...
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Face Centered Anisotropic Surface Impedance Boundary Conditions in FDTD
... surface impedance boundary approach is a computationally very efficient and flexible way to incorporate thin-sheet material properties in a FDTD ...function impedance matrix ...
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The impedance boundary condition for acoustics in swirling ducted flow
... local impedance is usually defined to relate the acoustic pressure to the normal acoustic velocity at the liner ...liner impedance was first considered over fifty years ...a boundary condition ...
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The method of fundamental solutions for the identification of a scatterer with impedance boundary condition in interior inverse acoustic scattering
... the impedance function, [15], or admittance, ...Robin impedance boundary condition ...the boundary ∂D, with λ characterising the level of ...Robin boundary condition for the scattered ...
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Suitable Impedance Boundary Condition Applied to the Enhancement of the Electric Field Radiated by a High Frequency Surface Wave Radar
... General Impedance Boundary Condition (GIBC) to model a dielectric medium which can propagate more than one surface wave as, for example, a dielectric slab with a large ...
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Determination of Impedance Boundary Conditions for the Pulmonary Vasculature
... This goal of this work was to determine impedance boundary conditions for the pulmonary vascular system. To accomplish this the organ-specific parameters needed to be defined. The structured tree parameters ...
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An impedance boundary condition EFIE that is low frequency and refinement stable
... or equivalently m = −z n×j, where ˆ (j, m) are the equivalent electric and magnetic surface currents, and z is a so-called surface impedance. When the IBC condition is combined with the representation formulas, it ...
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Piecewise Surface Impedance Boundary Conditions by Combining Rytov's Perturbation Method and Level Set Technique
... surface impedance, based on combining Rytov’s perturbation method and level set ...surface impedance boundary conditions on the surface of an arbitrarily shaped ...
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Electromagnetic Wave Scattering from Cylindrical Structure with Mixed-Impedance Boundary Conditions
... nj −n J n (k 0ρ ρ)e jnϕ (23) In this case, because variations of electric field along z-axis are not zero (∂E = ∂z 6= 0), both radial components of electric and magnetic fields exist. So there are two equations (6) and ...
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Hearing the shape of a compact Riemannian manifold with a finite number of piecewise impedance boundary conditions
... Ic3f is the Pdemannian surface area of Of, Kx is the scalar curvature of f at x, Hz is the second fundamental form of the boundary KaYz is the scalar curvature of c3f equipped with the i[r] ...
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Scattering Properties of the Strip with Fractional Boundary Conditions and Comparison with the Impedance Strip
... and impedance boundaries. Having fractional boundary with certain value of the fractional order ν we can find an equivalent impedance boundary with η = η(ν) as a function of ν and input ...
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Acoustics in a two deck viscothermal boundary layer over an impedance surface
... flow boundary layer over an impedance surface or acoustic lining are ...flow boundary layer (possibly due to turbulence), the boundary layer structure is separated asymptotically into two ...
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Numerical Method to Calculate Low Frequency Sound Field in Non anechoic Pools
... with impedance boundary based on finite element software ACTRAN is proposed in this ...surface impedance of non-anechoic pools’ ...surface impedance is then added to the surface of fluid ...
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A transient boundary element method model of Schroeder diffuser scattering using well mouth impedance
... The investigation sought to transfer the technique of modeling the well mouths of a Schroeder diffuser as compli- ant surfaces from the frequency to the time domain. A direct inverse Fourier transform of surface ...
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Diffraction by a Wedge or by a Cone with Impedance-Type Boundary Conditions and Second-Order Functional Difference Equations
... Also a 90 ◦ angle formed by a perfectly conducting half-plane and a semi-infinite impedance sheet can be studied. Fig. 2 displays the amplitude of the total electric field on a circle of radius kr = 12 centred on ...
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Analysis of Multi-Resonance Characteristics in Suspended Ring Antenna Applicable for IoT /WSN
... at boundary is presented in Figure 2(b), which concludes multi-resonance characteristics with enhanced impedance bandwidth and reflection coefficient at four different frequency bands ...
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Energy-Based Boundary Element Method for High-Frequency Broadband Sound Fields in Enclosures
... Acoustic FEA seeks the frequencies and associated nodal pressures for which the frequency dependent functional is minimized. A variational derivative of the functional with respect to the nodal pressures is determined. ...
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Direct and Alternate Current Conductivity and Magnetoconductivity of Nanocrystalline Cadmium Zinc Ferrite below Room Temperature
... The variation of real part of the ac conductivity for dif- ferent samples at room temperature and f = 1 MHz under the influence of magnetic field is shown in Figure 14. With increasing magnetic field, there is an ...
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Recent developments in fault location methods for distribution networks
... The complexity of the distribution network (typical and configuration cables, lateral, load distributed, feeder configuration) encourage the improvement of impedance based methods using measurement from ...
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New Formula for Evaluating the Number of Unit Cell of a Finite Periodic Structure Considered as Infinite Periodic One
... input impedance of such a structure can be f in different ...input impedance which is the load im- pedance for the former segment and repeat the same procedure until the ...input impedance is: ...
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