Starting from recent computer display technique developments, the paper illustrates some examples of graphic representation of dynamic systems for cases where the model is partly simulated on a parallel computer and partly described in a digital program, in order to take full advantage of the...

This paper presents the results of an investigation to determine the effect

The notion of the intervals per wavelength necessary to yield certain prescribed error levels per period is used to compare the computational efficiency of three classes of spatial differences combined with three time discretizations for the model problem ut = ux under periodic boundary...

General two-dimensional free surface seepage flow problems have been solved in the complex potential plane by the finite element method using rectangular elements. The inverse formulation in which the x and y coordinates are considered dependent variables, and the stream function and potential...

New normalized factorization procedures are presented for the coefficient matrix derived from the finite difference discretization of a self-adjoint elliptic 3D-P.D.E. leading to improved iterative schemes of solution. The derived algorithms are shown to be both competitive and computationally...

On propose de traiter des problémes plans de mécanique des systémes de points matériels en repérant la position de chaque point materiel par une tension alternative et en représentant les forces par des courants. La théorie, la réalisation pratique et des applications sont présentées.

The use of analogue models for semi-conductors enables classical simulation methods to be extended to the global simulation of static converters. The inherent disadvantages of classical analogue simulation are eliminated by the design of specific electronic circuits to make the analogue models...

After describing two circuits for the simulation of a hysteresis curve, the author describes an harmonic study of a simulator which entails the application of an harmonic signal at the input and to observe the output signal on the screen of an oscilliscope. These tests carried out while varying...

In doing research work in process dynamics a new idea has been used for the construction of the curve pick-up in the curve follower applied for this purpose. The new device consists of a modified Wheatstone bridge with a dummy sliding supply node, the latter acting as capacitive curve pick-up....

An ellipsoid model, based on confocal quadrics, was designed and used to assess the feasibility of plotting three dimensional potential fields with asymmetric boundaries, and also to develop the operational techniques of doing so. An analytical solution was available, so that measurements taken...