title: On-line learning in changing environments with applications in supervised and unsupervised learning.
abstract: An adaptive on-line algorithm extending the learning of learning idea is proposed and theoretically motivated. Relying only on gradient flow information it can be applied to learning continuous functions or distributions, even when no explicit loss function is given and the Hessian is not available. The framework is applied for unsupervised and supervised learning. Its efficiency is demonstrated for drifting and switching non-stationary blind separation tasks of acoustic signals. Furthermore applications to classification (US postal service data set) and time-series prediction in changing environments are presented.
authors.affiliation: School of Science and Engineering, Waseda University, Tokyo, Japan.
authors.forename: Noboru
authors.initials: N
authors.lastname: Murata
authors.forename: Motoaki
authors.initials: M
authors.lastname: Kawanabe
authors.forename: Andreas
authors.initials: A
authors.lastname: Ziehe
authors.forename: Klaus-Robert
authors.initials: KR
authors.lastname: Müller
authors.forename: Shun-ichi
authors.initials: S
authors.lastname: Amari
mesh_terms: D000465:Algorithms; D000818:Animals; D004777:Environment; D006801:Humans; D007858:Learning / Q000502:physiology*; D008954:Models, Biological; D009415:Nerve Net / Q000502:physiology*; D009862:Online Systems