The paper deals with the derivation of a three phase oscillator model. The model is unusual in embracing a third order three-dimensional dynamics. Another feature of the model is in enabling an undistorted generation of precise sinewaves. The oscillator is in this latter respect similar to the...

This paper describes how to generate uniformly continuous functions of two variables without making any vertex. In this system, all functions are obtained as an algebraic sum of linearly independent two-variable polynomials with each weight. Then, the polynomials are given by simulating...

Increased interest in high-speed hybrid analog/digital computation has led to the development of the Arizona Statistical Repetitive Analog Computer (ASTRAC I), which employs inexpensive digital logic to control a high-speed repetitive analog computer. The design of the machine has been described...

A differential-difference technique for the hybrid computer solution of parabolic partial differential equations with nonlinear terms is described. A theoretical analysis of the computational stability, convergence and accuracy of the technique is presented, showing that the method has certain...

A means for changing the gain or time constant of operational amplifiers in a precribed sequence of sixteen steps is described. Four bistable multivibrators are used the outputs of which control balanced diode switches. The first stage multivibrator is triggerred from a pulse generator which...

Conventional methods of inventory control in most retail enterprises emphasize minimization of cost while maintaining an appropriate degree of service to the clientele. This is done without regard to the effects produced on the distributor who is supplying the goods or the factory which is...

DARE II is a remarkably fast, on-line, all-digital, block-diagram-based simulation system which adds a convenient and inexpensive simulation console to a PDP-9 computer. Block statements, control logic, tabular functions, and data are entered and edited on a CRT keyboard. Solutions appear on a...

A hybrid/analog computer programme is presented for the automatic on-line computation of the time ratios necessary for the implementation of Strejc's method of indicial response analysis. The method, which does not require the recording of the transient response, avoids the difficulty of...