请问在ADS的momentum优化中的perturbed value是什么？

To define a parameter you need to provide a separate design to show the program
how an incremental change in that parameter value affects your original layout. The
original layout is referred to as the nominal design and the new layout is called a
perturbed design. The program will guide you through this process. When you add a
new parameter a separate design containing a copy of the nominal design is created.
You should make your changes in this design by applying perturbations as specified
in the Edit/View perturbation dialog. The modified copy is then saved as the
perturbed design. You need to define a separate perturbed design for each parameter.
Note Parameters you define using the Momentum > Optimization command are
automatically converted into component parameters when the Component
Parameters dialog box is opened.
Use the Layout Component dialog box (Momentum > Component > Parameters) to set
up the component parameters.
Using Nominal/Perturbed Designs 8-5
Enter a parameter name along with the nominal and perturbed values for the
parameter. The nominal and perturbed values do not have to correspond to the
changes in the layout implied by these parameters, however, in practice it makes
most sense to use values that have a physical meaning.

这个，，看看help吧，我印象中好像是你parameter变化的最大值?，总之，查查吧

呵呵，谢谢各位！