Constructive algorithms can be classified in two main groups: freezing and non-freezing, each one having its own advantages and inconveniences. In large scale problems, freezing algorithms are more suitable thanks to their speed. The main problem of these algorithms, however, comes from the fixed-size nature of the new units that they use. In this paper, we present a new freezing algorithm which constructs the main network by adding small and variable-size accessory networks trained by a non-freezing algorithm instead of simple units. ...
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