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Browsing by Subject "Pareto joint inversion"

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    Item type:Article, Access status: Open Access ,
    An application of the NSGA-II algorithm in Pareto joint inversion of 2D magnetic and gravity data
    (Wydawnictwa AGH, 2021) Miernik, Katarzyna; Węglińska, Elżbieta; Danek, Tomasz; Leśniak, Andrzej
    Joint inversion is a widely used geophysical method that allows model parameters to be obtained from the observed data. Pareto inversion results are a set of solutions that include the Pareto front, which consists of non-dominated solutions. All solutions from the Pareto front are considered the most feasible models from which a particular one can be chosen as the final solution. In this paper, it is shown that models represented by points on the Pareto front do not reflect the shape of the real model. In this contribution, a collective approach is proposed to interpret the geometry of models retrieved in inversion. Instead of choosing single solutions from the Pareto front, all obtained solutions were combined in one »heat map«, which is a plot representing the frequency of points belonging to all returned objects from the solution set. The conducted experiment showed that this approach limits the problem of equivalence and is a promising way of representing the geometry of the model that was retrieved in the inversion process.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Implementacja modelowania pola magnetycznego jako modułu systemu M.A.R.I.A. (Modular Approach Robust Inversion Algorithm) realizującego połączoną inwersję Pareto
    (Data obrony: 2018-09-06) Śledź, Elżbieta
    Wydział Geologii, Geofizyki i Ochrony Środowiska
    W pracy zaprezentowano moduł służący do modelowania pola magnetycznego w oprogramowaniu M.A.R.I.A. (Modular Approach Robust Inversion Algorithm). Moduł ten będzie w przyszłości wykorzystywany do wykonywania inwersji połączonej z grawimetrią i magnetotelluryką. W celu udowodnienia poprawności działania algorytmu liczącego efekt magnetyczny porównano wyniki z innym programem liczącym rozkład nad wybranymi prostymi strukturami.