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4.2.1 Global Optimization

Figure 4.2 depicts a *DONOPT* based optimization allowing for
global optimization with bound constraints. This optimization tool is
minimizing the value of the target quantity, which must be a single
floating point number. Additionally, it supports the introduction of
optimization constraints. The description for an optimization based on
*DONOPT* is defined in Description 4.3.

The **equality-constraint** demands that the quantity at a
selected port must not differ from the value specified in the
description by more than a certain tolerance, whereas the
**inequality-constraint** requires that the selected quantity
must not be negative during the optimization
procedure. *DONOPT* keeps the settings of the selected ports to be
optimized between their bounds. Therefore, each **model** port which
can be varied by *DONOPT* must be of the type `bound-float`.

*Rudi Strasser *

1999-05-27