Comment on “Artificial neural network based modeling of heated catalytic converter performance” by M. Ali Akcayol and Can Cinar [Applied Thermal Engineering 25 (2005) 2341]

A paper has been published in Applied Thermal Engineering, using feed-forward artificial neural network (ANN) in the modeling of heated catalytic converter performance. The present paper attempts to discuss and comment on the paper. The amount of data used in the paper are not enough to determine the number of fitting parameters in the network. Therefore, the model is not mathematically sound or justified. The conclusion is that ANN modeling should be used with care and enough data.