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The idea of the approach following St. Venant is to replace the dipolar source by a distribution of electrical monopoles which best reproduces the source moment.
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The paper cited above (Bauer et al. 2015), also contains a short overview of the St. Venant method implemented.
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Additionally, the parameters used are also defined in [Dissertation J. Vorwerk](https://www.mrt.uni-jena.de/simbio/images/Vorwerk_Dissertation_2016.pdf).
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A list of parameters passed to DUNEuro when using this approach:
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... | ... | @@ -36,11 +37,14 @@ A list of parameters passed to DUNEuro when using this approach: |
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Exponent of the weighting matrix (regularization), e.g., '1' or '2', 0 leads to identity matrix
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- **'relaxationFactor' : double**
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By choosing the relaxation parameter $`\lambda`$ large enough, sources with large
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values that do not contribute to the far-field (blind sources) are avoided, a typically used value is $`10^{-6}`$
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- **'initialization' : {'single_element', 'closest_vertex'}**
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- **'initialization' : {'closest_vertex', 'single_element'}**
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How to initialize the element patch for the monopole distribution: either use the vertex closest to the source and its neighbors, or use the interface neighbors of the element containing the source
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- **'referenceLength' : double**
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Scaling factor such that $`x_{ij}/ref < 1`$ for all monopole locations $`x_{ij}`$
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Scaling factor such that $`(x_i - x_0)/ref < 1`$ for all monopole locations $`x_{i}`$, e.g. 20 mm
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- **'mixedMoments' : bool**
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Determines if non-diagonal multi-indices are used for second-order moments (recommended), see (see [Dissertation A. Nüßing](http://nbn-resolving.de/urn:nbn:de:hbz:6-67139436770))
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