CHANGELOG.rst

Change Log

This is CASHOCS' change log. Note, that only major and minor releases are covered here as they add new functionality or might change the API. For a documentation of the maintenance releases, please take a look at https://github.com/sblauth/cashocs/releases.

1.2.0 (December 01, 2020)

• Users can now supply their own bilinear form (or scalar product) for the computation of the shape gradient, which is then used instead of the linear elasticity formulation. This is documented at https://cashocs.readthedocs.io/en/latest/demos/shape_optimization/doc_custom_scalar_product.html.
• Added a curvature regularization term for shape optimization, which can be enabled via the config files, similarly to already implemented regularizations. This is documented at https://cashocs.readthedocs.io/en/latest/demos/shape_optimization/doc_regularization.html.
• cashocs can now scale individual terms of the cost functional if this is desired. This allows for a more granular handling of problems with cost functionals consisting of multiple terms. This also extends to the regularizations for shape optimization, see https://cashocs.readthedocs.io/en/latest/demos/shape_optimization/doc_regularization.html. This feature is documented at https://cashocs.readthedocs.io/en/latest/demos/shape_optimization/doc_scaling.html.
• cashocs now uses the logging module to issue messages for the user. The level of verbosity can be controlled via :pycashocs.set_log_level.
• New configuration file parameters:
  • Section Regularization:
    • factor_curvature can be used to specify the weight for the curvature regularization term.
    • use_relative_weights is a boolean which specifies, whether the weights should be used as scaling factor in front of the regularization terms (if this is False), or whether they should be used to scale the regularization terms so that they have the prescribed value on the initial iteration (if this is True).

1.1.0 (November 13, 2020)

• Added the functionality for cashocs to be used as a solver only, where users can specify their custom adjoint equations and (shape) derivatives for the optimization problems. This is documented at https://cashocs.readthedocs.io/en/latest/demos/cashocs_as_solver/solver_index.html.
• Using cashocs.create_config is deprecated and replaced by cashocs.load_config, but the former will still be supported.
• Configuration files are now not strictly necessary, but still very strongly recommended.
• New configuration file parameters:
  • Section Output:
    • result_dir can be used to specify where CASHOCS' output files should be placed.

1.0.0 (September 18, 2020)

• Initial release of CASHOCS.