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  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    The effect of intrinsic model noise upon resistivity inversion (1980)
    Springer
    Pure and applied geophysics 119 (1980), S. 841-853 
    Details
    ISSN: 1420-9136
    Keywords: Resistivity ; inversion techniques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Model uncertainty is introduced into direct-current resistivity data by adding random changes to layer thicknesses in a ten-layer model. The resulting information is then aliased by generating a sounding curve which contains less information than the ten resistivities and nine thicknesses. These sounding curves are then inverted via the Backus-Gilbert algorithm using singular value decomposition to obtain solutions in terms of simpler two-or three-layer models. Quantitative results confirm what has been known qualitatively for many years as the principle of equivalence. An interesting result is that the geometric average of a given suite of noisy models is virtually identical to the best-fit model for the average of the noisy curves. The results show that the inversion of resistivity data by nonlinear least-squares parameter fitting is stable in the sense that noise in the data inverts to the same magnitude of noise in the model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01131261
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic algebras for tetraploidy with several loci (1980)
    Springer
    Journal of mathematical biology 9 (1980), S. 297-304 
    Details
    ISSN: 1432-1416
    Keywords: Genetic algebra ; Polyploidy ; Tetraploids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The algebra of gamete multiplication corresponding to a population of autotetraploids which differ at n loci, each with an arbitrary number of alleres, is proven to be a genetic algebra, irrespective of the mode of segregation of the n loci.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276495
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    Paper (German National Licenses)
    Fulltext
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