It is shown that a method for the identification of deterministic systems derived from the Kalman filter is related to a gradient technique of parameter estimation and that the range of problems to which the gradient method may be applied is thereby extended. Various versions of the...

This paper describes a relay-operated one-amplifier memory-pair circuit, which frees a much more expensive track-hold pair of electronically switched integrators in sampled-data system simulation. The circuit is intended for experiments with sampled-data control systems and difference equations...

Hyperbolic equations are often derived from conservation principles. We will show in this paper that in those cases, expressing this principles in a natural discrete form provides a procedure for the derivation of finite-element approximations. Likewise, the solution of parabolic equations also...

Dynamic system simulation using analog or hybrid computers requires scaling of the variables. This problem arises also in digital simulation when fixed-point arithmetic is used. Prediction of variables extrema is the most difficult problem in scaling. Authors developed methods of estimation of...

After showing that Chebyshev polynomials may be easily displayed on an oscilloscope screen as a special case of certain Lissajous figures, the author proposes that this relation may be used as the basis of a Chebyshev polynomial unit for an analogue computer. It is suggested that correctly...

In designing amplitude comparators for computing purposes one meets the problem of reducing errors due to hysteresis. This effect is present in amplitude comparator circuits functioning for both signs of the input derivative. A simple method to reduce hysteresis is proposed, especially when sets...

The theory and design of a special purpose stochastic computer for the high-speed simulation of Markov chains and random walks is described. Experimental results are presented for the transient and steady response to Markov systems and for fundamental studies of random walks. The paper...

Hybrid simulation means performing simulation by means of hybrid processing with a hybrid processor consisting of a parallel and a sequential processor. To be able to value the applicability of hybrid simulation, it is necessary to have some knowledge about hybrid processing. Parallel and...

The author examines the present tendencies observable in the use of analogue and digital computers. He makes a critical comparison, of several aspects, their elasticity, convenience of use and price. These two technics often complete each other.

L'utilisation du Calcul analogique dans l'étude expérimentale des processus aléatoires pose le problème de la génération de signaux aléatoires de caractéristiques déterminées.