Szukana fraza: [Abstract = "The background and motivations for using such techniques are given, and some algorithms are discussed. The paper alsoshows a simple numerical example of linear state estimation. Finally, as an example of nonlinear estimation, the paperdiscusses the possibility of using these algorithms for parameters and fractional order estimation for fractional order systems.Numerical examples of the use of these algorithms in a general nonlinear case are presented."]