Szukana fraza: [Abstract = "The double observer uses different measurements of input\/output signals in both the windows, and for each current time t simultaneously reconstructs two values of the state\-the final value of the state in the left\-side window zT \(t \- T \) and the initial value of the state z0\(t \- T \) in the right\-side window. If the process parameters are constant, the values of both the states on the common joint edge are the same."]