Constraint acquisition systems assist the non-expert user in modelling her problem as a constraint network. QUACQ is sequential algorithm that generates queries (partial) examples to be classified positive or negative. The drawbacks are may need answer great number of such examples, within significant waiting time between two learn all constraints. In this paper, we propose PACQ, portfolio-base...

After briefly reviewing the appealing psychological properties of PDP systems, an introduction to their historical roots and basic computational mechanisms are provided. A variety network architectures described including one-layered perceptrons, backpropagation networks, Boltzmann machines recurrent systems. Three simulations analysed: First, a model that purports learn past tense English verb...