A novel approach to adaptive direct neurocontrol is discussed in this paper. The objective is to construct an adaptive control scheme for unknown time-dependent nonlinear plants without using a model of the plant. The proposed approach is neural-network based and combines the self-tuning...

In this paper, we look at a particular case of application which is Hölder continuous, namely the map from a matrix A to one of its eigenvalues λ, when it is multiple defective. Two asymptotic Hölder condition numbers are considered: one (with respect to the other) is associated with a...

The paper deals with different pipeline models and their simulation. First, a nonlinear distributed parameters model is derived, which is then linearised and its transfer function is obtained by a Laplace transformation and corresponding initial and boundary conditions. The pipeline is...

Inverse techniques for dynamic simulation models which allow determination of the time history of “inputs” needed to achieve a specified time history for a selected set of “outputs” have been receiving some attention in recent years within aerospace engineering and in other application...

For linear dynamic circuits, the condition of the index to be higher than one is calculated symbolically. Using Analog Insydes a function for the computer algebra system Mathematica is written. It calculates the index condition if the sparse tableau analysis method is applied to the circuit....

The Lambert W is a transcendental function defined by solutions of the equation Wexp(W)=x. For real values of the argument, x, the W-function has two branches, W0 (the principal branch) and W−1 (the negative branch). A survey of the literature reveals that, in the case of the principal branch...

Many problems in science and engineering involve computer modeling of physical phenomena. Problem Solving Environments (PSEs) are software systems designed to hide the intricacies of computer modeling of physical phenomena and guide a researcher towards a meaningful solution. Some computer...

New methods for nonlinear model reduction of dynamic models, described by nonlinear differential equations have been developed. The methods are based on singular perturbations, weak coupling and cost functionals for computing and analyzing the reduced order model. By introducing a formally...

The problem we are dealing with takes its origin in the electromagnetic shaping of melted metal. High frequency alternating currents are used in the process. They are running essentially on the conductor surface, so it implies skin effect since the electric and magnetic fields are strongly...

The interaction between economic and ecologic dynamic systems is analyzed with a multi-player dynamic game, in which each player invests and allocates available capital to the production or consumption of natural resources and goods, and evaluates the outcome of all players’ actions as well as...