Structures supporting machines which give rise to dynamic loads must be carefully analyzed and designed to assure satisfactory performance. These highly complex systems must be reduced to mathematical and computer models which will behave in a similar fashion as the structure-machine-soil...

The wind distribution in the atmospheric boundary layer is affected by air motions on all scales. In low-latitude coastal areas, however, the wind flows generally are dominated by the diurnally varying land and sea breezes. These flow patterns have been known to exert great influence on local...

The parameters of the dynamic model of a linear system are estimated from the measurements of the input and output data by using the recursive algorithm for matrix pseudoinverse. For measurements contaminated with noise, the stochastic approximation algorithm is employed in conjunction with the...

De nombreuses simulations sur ordinateur nécessitent la génération d'échantillons artificiels destinés à représenter des phénomènes aléatoires à l'entrée d'un système physique. Le plus souvent, ces échantillons artificiels sont indépendants et de nombreux algorithmes de...

General estimations of modern hybrid computing systems are given, A description of the structure and basic technical characteristics of a new hybrid computing system of the third generation “AII, BK-3” and its main digital, analog and conversions is ⌋ resented. The peculiarities of new...

The “adaptive open loop control” is a compromise between the open loop and the closed loop controls. It consists in estimating the state of the system periodically in such a way that the control can be corrected, taking into account the estimated state, the final desired state and the...

On passe en revue les schémas usuels rencontrés dans la littérature de specialité et on analyse leurs avantages et désavantages. En tenant compte de la nécessité d'assurer une large gamme de fréquences et une haute précision, on opte pour un multiplicateur avec transformateurs...

In the previous papers [1]∽[3], fractional powers were used to approximate elementary functions and their usefulness was proved with experimental results. In the present paper, some further investigations are reported. That is, elliptic integrals in Legendre's canonical form and Bessel...

An explicit formula expressing the error of a linear approximation to a given function is shown. The result gives us a simple method of choosing the ⪡breakpoints⪢ of a piecewise linear approximation. Some comments on ⪡interpolative⪢ versus ⪡minimax⪢ approximation and equal versus...

In this article a description is given of a 12 bit digital potentiometer for hybrid computer application. The system is composed of standard building blocks. Emphasis is laid on the development problems met and the problem solutions developed.