Geophysical inversion with a neighbourhood algorithm-II. Appraising the ensemble
نویسندگان
چکیده
منابع مشابه
Geophysical inversion with a neighbourhood algorithm –II. Appraising the ensemble
Monte Carlo direct search methods, such as genetic algorithms, simulated annealing etc., are often used to explore a finite dimensional parameter space. They require the solving of the forward problem many times, that is, making predictions of observables from an earth model. The resulting ensemble of earth models represents all ‘information’ collected in the search process. Search techniques h...
متن کاملGeophysical inversion with a neighbourhood algorithmöII. Appraising the ensemble
Monte Carlo direct search methods, such as genetic algorithms, simulated annealing, etc., are often used to explore a ¢nite-dimensional parameter space. They require the solving of the forward problem many times, that is, making predictions of observables from an earth model. The resulting ensemble of earth models represents all `information' collected in the search process. Search techniques h...
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This paper presents a new derivative-free search method for finding models of acceptable data fit in a multidimensional parameter space. It falls into the same class of method as simulated annealing and genetic algorithms, which are commonly used for global optimization problems. The objective here is to find an ensemble of models that preferentially sample the good datafitting regions of param...
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[1] Issues controlling efficient parallel implementations of a popular direct search inversion algorithm are analyzed and discussed. A naive parallelization of a particular method, the Neighbourhood parameter search algorithm, leads to inefficient use of parallel architecture through lack of scalability and intolerance to hardware faults. These factors are quantified, and their origins are expl...
متن کامل85.15 Nonlinear Inversion by Direct Search Using the Neighbourhood Algorithm
The Neighbourhood Algorithm (NA) was introduced by Sambridge (1999a,b) as a direct search method for nonlinear inversion. This approach is applicable to a wide range of inversion problems, particularly those where the relationship between the observables (data) and the unknowns (a finite set of model parameters) is rather complex, e.g., fitting of seismic waveforms for Earth structure or source...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1999
ISSN: 0956-540X,1365-246X
DOI: 10.1046/j.1365-246x.1999.00900.x