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Jiming Song
Iowa State University
113Publications
28H-index
5,677Citations
Publications 113
Newest
#1Ming YangH-Index: 3
#2Jiming SongH-Index: 28
Last.Norio NakagawaH-Index: 8
view all 3 authors...
The boundary integral equations (BIE) method is a numerical computational method of solving linear partial differential equations which have been formulated as integral equations. It can be applied in many areas of engineering and science including fluid mechanics, acoustics, electromagnetics, and fracture mechanics. The eddy current problem is formulated by the BIE and discretized into matrix equations by the method of moments (MoM) or the boundary element method (BEM). The three dimensional ar...
May 1, 2011 in ECTC (Electronic Components and Technology Conference)
#1Sidharath Jain (Iowa State University)H-Index: 6
#2Jiming Song (Iowa State University)H-Index: 28
Last.Yidnekachew S. Mekonnen (Intel)H-Index: 6
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An equivalent model for a lossy shielded microstrip line on layered media is constructed by replacing the layered media with a single effective medium and a detailed analysis of its validity at different frequencies and different range of dimensions has been presented for application to on chip interconnects. The relative permittivity for a single layer microstrip which results in the same propagation constant for the dominant mode as the layered one at a given frequency is considered to be the ...
#1Tianming Chen (Iowa State University)H-Index: 4
#2Jiming Song (Iowa State University)H-Index: 28
Last.Nicola Bowler (Iowa State University)H-Index: 19
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Previously, concentric coplanar capacitive sensors have been developed to quantitatively characterize the permittivity or thickness of one layer in multi‐layered dielectrics. Electrostatic Green’s functions due to a point source at the surface of one‐ to three‐layered test‐pieces were first derived in the spectral domain, under the Hankel transform. Green’s functions in the spatial domain were then obtained by using the appropriate inverse transform. Utilizing the spatial domain Green’s function...
#1Hui Xie (Iowa State University)H-Index: 2
#2Jiming Song (Iowa State University)H-Index: 28
Last.Norio Nakagawa (Iowa State University)H-Index: 8
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A boundary integral equation (BIE) is developed for the eddy-current (EC) problems with Dirichlet boundary condition by considering the difference between the field without cracks and the one with cracks. Once the field and its normal derivative are given for the structure in the absence of cracks, normal derivative of the scattered field on the surface can be calculated by solving this integral equation numerically. For infinite-domain problems, this equation is more efficient than the conventi...
#1Bongkeun Kim (Iowa State University)H-Index: 2
#2Jiming Song (Iowa State University)H-Index: 28
Last.Xueyu Song (Iowa State University)H-Index: 25
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In this paper, we used a coarse-grained model at the residue level to calculate the binding free energies of three protein-protein complexes. General formulations to calculate the electrostatic binding free energy and the van der Waals free energy are presented by solving linearized Poisson–Boltzmann equations using the boundary element method in combination with the fast multipole method. The residue level model with the fast multipole method allows us to efficiently investigate how the mutatio...
#1Jiming Song (Iowa State University)H-Index: 28
#2Sidharath Jain (Iowa State University)H-Index: 6
The approximation of summation with a fast convergent series has been frequently used to speed up the solution of problems in electromagnetics like solving for propagation constant for shielded microstrip lines, finlines, etc.[1]. But such convergent series exist only for specific cases and cannot be applied to speed up the summation in general case. The Euler Maclaurin Formula (EMF) [2] has been widely used for approximation of finite and infinite series summations for any general series.
#1Sidharath Jain (Iowa State University)H-Index: 6
#2Jiming Song (Iowa State University)H-Index: 28
In this paper, a novel accelerated spectral domain approach (SDA) using few basis has been used to obtain very accurate and quick solution for propagation constant (β) for shielded microstrip lines. The convergence of the elements of the Galerkin matrix is achieved by leading term extraction using asymptotic expansions for the Bessel's and the Green's functions and the summation of the leading terms is approximated with a super convergent series. This approach results in highly accurate results ...
#1Hui Xie (Iowa State University)H-Index: 2
#2Jiming Song (Iowa State University)H-Index: 28
Last.Norio Nakagawa (Iowa State University)H-Index: 8
view all 4 authors...
A novel boundary integral equation (BIE) is developed for eddy‐current nondestructive evaluation problems with surface crack under a uniform applied magnetic field. Once the field and its normal derivative are obtained for the structure in the absence of cracks, normal derivative of scattered field on the conductor surface can be calculated by solving this equation with the aid of method of moments (MoM). This equation is more efficient than conventional BIEs because of a smaller computational d...
#1Sidharath Jain (Iowa State University)H-Index: 6
#2Jiming Song (Iowa State University)H-Index: 28
In this paper, a technique for numerical acceleration of the spectral domain approach (SDA) for shielded microstrip lines has been presented. This is achieved by speeding up the convergence of series summation in the elements of the Galerkin matrix by leading term extraction and approximating the series summation of the tail as an integral with a correction. This technique results in highly accurate results for the effective permittivity without the need for numerical integration and incurring a...
#1Fu-Gang Hu (Iowa State University)H-Index: 8
#2Jiming Song (Iowa State University)H-Index: 28
In this paper, the two-dimensional scattering from multilayered PEC arrays is calculated by using IE approach combined with connection scheme. This approach can handle the case of arbitrarily-shaped PEC objects and the different media in different layers. Numerical results are given to validate the formulation proposed. More details in the formulation and interesting numerical results will be presented at the conference.
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