Orthogonality of Walsh functions is used to obtain independent parameter estimation equations for continuous-time dynamic systems. The conditioning of these equations is optimized by use of optimum inputs and is based on maximizing analytic non-linear functions of Walsh coefficients. It is shown...

We investigate a general method for estimating numerical values for the parameters which occur in certain partial differential equations. The method uses direct approximations of the solution and selects parameters to match the differential equation. Several numerical examples are presented to...

Uncertainty pervades the description of ill-defined systems and the data collected from the for model development. Young (1) has used a systems theoretic framework to espouse a general theory of modeling based upon the scientific method to cope with uncertainty. We show a hybrid...

The implementation of the Preconditioned Conjugate Gradient method for the solution of large linear systems arising from the discretization of differential operators, requires the predetermination of only one iteration parameter. The numerical determination of the optimal value of this constant...

This paper provides a comparative survey of the existing multidimensional state-space models. The 2-Dimensional state-space models are first presented and compared to each other from both the mathematical and the applications point of view. Then a canonical 3-Dimensional state space realization...

Some probabilistic techniques are discussed regarding their use in estimating the principal eigenvalue of an elliptic operator. Such estimates are useful when studying models for biochemical reactions governed by lateral diffusion.

Macroeconomic planning is considered as a multicriterial decision problem with respect to the controlled distribution of resources and national product. By overlapping decomposition possibilities for decentralized control approach to multicriterial decision making and control are studied.

This paper describes a simplified model of a French pressurized water reactor (PWR) power plant. The goal of this model is the simulation of the xenon effect and his consequence on the core axial power distribution with a reactor control by means of grey rods during load-following operations and...

The application of Z-transform transfer function models to the identification of crude steel (blast furnace iron) production systems is considered. A feedback approach has been proposed, in that the desired output by the planners in the steel industry has been used to close the loop. A direct...