Journal
NEURAL NETWORKS
Volume 14, Issue 4-5, Pages 551-573Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0893-6080(01)00018-1
Keywords
life-long learning; continuously learning; incremental learning; stability-plasticity dilemma; catastrophic interference; radial basis function; cell structures
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As an extension of on-line learning, life-long learning challenges a system which is exposed to patterns from a changing environment during its entire lifespan. An autonomous system should not only integrate new knowledge on-line into its memory. but also preserve the knowledge learned by previous interactions. Thus, life-long learning implies the fundamental Stability-plasticity Dilemma, which addresses the problem of learning new patterns without forgetting old prototype patterns. We propose an extension to the known Cell Structures. growing Radial Basis Function-like networks, that enables them to learn their number of nodes needed to solve a current task and to dynamically adapt the learning rate of each node separately. As shown in several simulations, the resulting Life-long Learning Cell Structures posses the major characteristics needed to cope with the Stability-Plasticity Dilemma. (C) 2001 Elsevier Science Ltd. All rights reserved.
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