  Propagation of dressed solitary excitations are studied in a partially
degenerate quantum plasma in the framework of quantum-hydrodynamics (QHD) model
using multiple scales technique. The evolution equation together with a linear
inhomogeneous differential equation is solved using Kodama-Taniuti
renormalizing technique. It is shown that the type of solitary excitations
(bright or dark) is defined by two critical plasma parameter values.
