... and s( f2j)( j ¼ 1, 2, 3) arevariant in the FNS (Supplementary material, Supplementarymathematical descriptions, Theorem 5).On the other hand, we note that the signs of f31, f42areall ... Supplementarymaterial, Supplementary mathematical descriptions) and in this case we simply say that the experimentaldata set is a fully excited information set at xi.For instance, for the system ... assumption on parameter perturbations for each network node. Basedon these equations, we further describe the available specific informationfrom each part of experimental data in detail and show the functionalinteraction...