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This is Fig. 8 from the 2011 GENOPT paper. This slide lists the decision variables for a typical specific case that is a member of the “trusscomp” class.
Note that the composite laminates, NLAYRC (“number of layers in the truss-core laminate”) and NLAYRF (“number of layers in each face sheet laminate”) are different in this figure from the numbers, NLAYRC and NLAYRF, in the case called “nasatruss2”, which is one of the specific cases examined in the 2011 GENOPT paper.
In the case, nasatruss2, NLAYRC = 2 and NLAYRF = 6, and there is only one ply thickness, THICK(1) that is an independent decision variable. The other ply thicknesses in the nasatruss2 case are all linked to THICK(1), as described in the text of the paper.
The laminates and decision variables listed in this figure pertain to the specific case called “test” in Ref. [3] listed in the 2011 GENOPT paper, not to the specific case called “nasatruss2”, which is the name of the specific case that is the main subject of the 2011 GENOPT paper.
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