Szukana fraza: [Abstract = "The LHLS scheme reveals some features of Least\-Squares \(LS\) estimation and Instrumental\-Variable \(IV\) estimation. An algorithm for the on\-line LHLS scheme is presented and compared with LS and IV estimation schemes for a linear, second\-order system. The fast convergence of the derived LHLS on\-line scheme is demonstrated in the case of detecting changes in parameters of a non\-stationary system."]

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