Specify scale factors and,
for adjoint design sensitivity analysis, quantities that represent the
derivatives of the scale factors divided by the scale factors for material
mass.
This option is used to specify scale factors using a distribution for
material mass. In addition, in an adjoint design sensitivity analysis, you can
specify quantities that represent the derivatives of the scale factors divided
by the scale factors. In the latter case, the scale factors and their
derivatives are used in the computation of design responses and topology
sensitivities.