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- W3100650998 abstract "Low-complexity iterative and direct solvers are developed for the volume integral equation (VIE) based general largescale electrodynamic analysis. The dense VIE system matrix is first represented by a new cluster-based multilevel low-rank representation. In this representation, all the admissible blocks associated with a single cluster are grouped together and represented by a single low-rank block, whose rank is minimized based on prescribed accuracy. From such an initial representation, an efficient algorithm is developed to generate a minimal-rank H <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> -matrix representation. This representation facilitates faster computation, and ensures the same minimal rank's growth rate with electrical size as evaluated from singular value decomposition. For the minimal-rank representation whose rank grows with electrical size linearly for a prescribed accuracy, we develop linear-complexity H <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> -matrix-based storage and matrix-vector multiplication, and thereby an O(N) iterative VIE solver. Moreover, we develop an O(NlogN) matrix inversion, and hence a fast O(NlogN) direct VIE solver for large-scale electrodynamic analysis. Both theoretical analysis and numerical simulations of large-scale one-, two-, and three-dimensional structures on a single-core CPU, resulting in millions of unknowns, have demonstrated the low complexity and superior performance of the proposed VIE electrodynamic solvers." @default.
- W3100650998 created "2020-11-23" @default.
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- W3100650998 date "2017-01-01" @default.
- W3100650998 modified "2023-09-24" @default.
- W3100650998 title "Low-Complexity Direct and Iterative Volume Integral Equation Solvers With a Minimal-Rank ${mathcal H}^2$-Representation for Large-Scale Three-Dimensional Electrodynamic Analysis" @default.
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- W3100650998 doi "https://doi.org/10.1109/jmmct.2017.2764683" @default.
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