Dakota Reference Manual  Version 6.4
Large-Scale Engineering Optimization and Uncertainty Analysis
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pce


Polynomial Chaos Expansion surrogate model

Specification

Alias: none

Argument(s): none

Required/Optional Description of Group Dakota Keyword Dakota Keyword Description
Required
(Choose One)
Group 1 sparse_grid_level_sequence

Set the sparse grid level to be used when peforming sparse grid integration or sparse grid interpolation

expansion_order_sequence

The (initial) order of a polynomial expansion

collocation_points_sequence Specify the number of collocation points used to estimate PCE coefficients using regression or orthogonal-least-interpolation.

Description

Selects a polynomial chaos expansion (PCE) surrogate model to use in the Bayesian likelihood calculations. When using PCE as a surrogate within the Bayesian framework, the PCE coefficients can be computed either from integration using a sparse grid or from regression using a random/unstructured data set.

See Also

These keywords may also be of interest: