Chaotic and non-chaotic mixed oscillations in a logistic system with delay and heat-integrated tubular chemical reactor

The paper deals with the theoretical analysis of a logistic system composed of at least two elements with distributed parameters. It has been shown that such a system may generate specific oscillations in spite of the fact that the solutions of the mathematical method are characterized by no dynamic bifurcations. It has also been shown that the time series of the state variables of such a system may behave in a semi-chaotic way. This means that they have then predictable and unpredictable fragments. The analysis has been illustrated by two examples, viz. of a simple logistic model and of a tubular chemical reactor with thermal feedback. (C) 2002 Elsevier Science Ltd. All rights reserved.