.. _method-bayes_calibration-wasabi-emulator-mf_pce-p_refinement-dimension_adaptive-decay:

"""""
decay
"""""


Estimate spectral coefficient decay rates to guide dimension-adaptive refinement.


.. toctree::
   :hidden:
   :maxdepth: 1



**Specification**

- *Alias:* None

- *Arguments:* None


**Description**


Estimate spectral coefficient decay rates from a rate estimation technique similar to Richardson extrapolation.  These decay rates are used to guide dimension-adaptive refinement, where slower decay rates result in higher dimension preference.



**Examples**



.. code-block::

    method,
            polynomial_chaos
              sparse_grid_level = 3
              dimension_adaptive p_refinement decay
                max_iterations  = 20
                convergence_tol = 1.e-4