An electronic nose system, which imitates the function of the human olfactory system, has been developed and applied to evaluate the quality of cigarettes. Two major parts of the system, that is, the sensor array and the neural network, are presented. The system has been used to evaluate and classify five different cigarette smokes. The feasibility of evaluating the quality of cigarettes with the electronic nose system has proved sound by the preliminary experiment and the resulting data.
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