time series of concentrations

MODELING EVOLUTIONARY DYNAMICS OF COMPLEX ECOSYSTEMS USING COMBINED CHAOS THEORY AND NEURAL NETWORKS METHODS: I. FORMAL THEORETICAL BASIS FOR APPLICATION TO ENVIRONMENTAL RADIOACTIVITY DYNAMICS

We present elements of the formal mathematical approach to the analysis, modeling and further prediction of the nonlinear dynamics of chaotic systems based on the methods of nonlinear analysis and neural networks. As the object of studing is the environmental radioactivity dynamics. Using such a combined method is proposed for the first time in the environmental radioactivity dynamnics studying.

Analysis and forecast of the environmental radioactivity dynamics based on the methods of chaos theory: general conceptions

For the first time, we present a completely new technique of analysis, processing and forecasting of any time series of the environmental radioactivity dynamics, which schematically is as follows: a) general qualitative analysis of a dynamical problem, typical environmental radioactivity dynamics (including a qualitative analysis from the viewpoint of ordinary differential equations, the “Arnold-analysis”); b) checking for the presence of chaotic (stochastic) features and regimes (the Gottwald-Melbourne’s test; the correlation dimension method); c) reducing the phase space (the choice of ti