sentences:  Different macroscopic environmental constraints lead to different types of ensembles, with particular statistical characteristics.The nonequilibrium statistical operator method permits one to generalize the Gibbs ensemble method to the nonequilibrium case and to construct a nonequilibrium statistical operator which enables one to obtain the transport equations and calculate the transport coefficients in terms of correlation functions, and which, in the case of
  equilibrium, goes over to the Gibbs distribution.In the framework of the latter approach the derivation
  of kinetic equations for a system in a thermal bath was carried out.