In this paper it is shown that a nonlinear system with an isolated equilibrium can be identified using two kinds of Dynamic Neural Networks, the Hopfield type (DNN-H) and the Multilayer type (DNN-M). The identified models are in continuous time. The equilibrium point is assumed to be the origin,...

The role of unsteady laminar flows for planktonic communities is investigated. Langmuir circulation is used, as a typical medium-scale structure, to illustrate mechanisms for the generation of plankton patches. Two behaviours are evident: chaotic regions that help to spread plankton and locally...

Atmospheric air quality modeling relies in part on numerical simulation. Required numerical simulations are often hampered by lack of computer capacity and computational speed. This problem is most severe in the field of global modeling where transport and exchange of trace constituents are...

Two types of models can be used to describe nonlinear agricultural systems: mechanistic and empirical. For the first type of models, mathematical methods for simulating, a set of differential equations which characterise the underpinning process relationships are outlined. For the second type of...

This paper considers the passage of a parallel, uniform stream of particles through a parallel-sided, homogeneous slab of material capable of scattering and absorption. Particle histories are followed until the particle escapes from the near or far surface of the slab. Each particle carries a...

In this paper, we present an algorithm for construction of minimal involutive polynomial bases which are Gröbner bases of the special form. The most general involutive algorithms are based on the concept of involutive monomial division which leads to partition of variables into multiplicative...

A model and methodology for simulating traffic in conurbation are described. The aim of the simulation was the optimization of traffic with special regard to the air pollution caused. For the determination of the solution aimed at intelligent demons monitoring and modifying the model are used....

A two-particle stochastic model of turbulent dispersion in the classical isotropic pseudoturbulence is suggested. The main idea is to describe the relative motion of two particles in small scales by a stochastic differential equation, while the dispersion in large scales is governed by the...

This paper deals with the modular hierarchical modelling and simulation possibilities of the simulation language SIMCOS. After a brief description of the modular modelling possibilities of modern modelling and simulation tools, the emphasis is put on the concept of precompiled dynamic submodels...

In the present work a numerical modelling of the processes of exposure and development of the resist during electron beam lithography (EBL) on structures incorporating YBa2Cu3O7 high temperature superconductor (HTS) thin films is performed. Monte Carlo method is used to simulate the penetration...