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Comparison between different neural network architectures for odour discrimination

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2 Author(s)
Gestri, G. ; Pisa Univ., Italy ; Starita, A.

With the attempt to develop an artificial olfactory system able to mimic the discrimination ability of the natural system, several artificial neural network architectures were considered and evaluated on the basis of their performances and similarities with the neurophysiological models of the biological system. The neural network architectures were analysed and tested with experimental data from an array of broadly tuned polymers gas sensors. Since these sensors are weakly selective, like the receptors of the natural system, the task of the networks is to obtain the selectivity enhancement that is needed to correctly discriminate the odours. The advantage of using ANN to classify data rather than statistical methods is that doesn't require many assumptions about the form of the data. In addition, ANN can cope with highly non linear data and can be made to cope with noisy or drifting data. The paradigms considered are Counterpropagation Networks (R. Hecht Nielsen, 1987), Bi directional Associative Memories (B. Kosko, 1988), Hamming (R.P. Lippmann, 1987), and Adaptive Resonance Theory Networks (G.A. Carpenter and S. Grossberg, 1988). The results were compared and in a few cases some modifications of the used paradigms have been done to optimise the answer of the system

Published in:

Artificial Neural Networks, 1995., Fourth International Conference on

Date of Conference:

26-28 Jun 1995

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