@PHDTHESIS\{IMM1992-05789,
    author       = "J. E. Parkum",
    title        = "Recursive identification of time-varying systems",
    year         = "1992",
    school       = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    type         = "",
    note         = "Supervised by Niels K. Poulsen, and Henrik Spliid, {DTU} Informatics, http://www.imm.dtu.dk",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/5789-full.html",
    abstract     = "The present thesis is concerned with recursive identification of time-varying systems. Methods designed for estimating slowly drifting system parameters are studied. A general algorithm containing most existing methods as special cases is formulated, and a unified treatment of its convergence properties in an ideal deterministic environment is presented. An algorithm which discounts information non-uniformly and in accordance with the distribution of the information flow is developed and examined. Finally, the discussed techniques are applied to a practical problem with adaptive control of a non-linear process."
}