This paper describes a Monte Carlo technique for estimating the lowest eigenvalues of certain elliptic and hyperbolic partial differential equations with Dirichlet boundary conditions. (2) A stochastic process whose output conditional probability density distribution satisfies a partial...

A proof is given that the optimal inverter problem is NP-complete. Other related problems are also shown to be NP-complete.

A method is developed for hybrid simulation of a linear sequential learning algorithm. Up to 60 weights can be corrected very fast simultaneously. Computing times are mainly dependent on speed of presentation of the patterns to the analogue computer. One type of analogue circuit seemed most...

This paper describes a novel function generator and multiplier using digital-to-analog conversion techniques. The device has been designed and built to supplement the existing analog computer facilities at the University of British Columbia.

In electrical drives using an actuator supplied by a static converter, it is possible to work out a model of the converter-motor system which is easily implemented on a hybrid or digital computer. This model can be elaborated to improve the efficiency of the digital simulation. Computation time...

It is convenient to consider analog computer programs in two parts, patching and amplifier input factors. Scaling is accomplished by the specification of the input factors. In this paper a simple method is presented for imposing both magnitude and time scaling factors. Negative time scaling is...

Parameter estimation techniques are of ever-increasing interest in the fields of medicine and biology, as greater efforts are currently being made to describe physiological systems in explicit quantitative form. Although some of the techniques of parameter estimation as developed for use in...

The insertion of high gain integrated amplifiers in diode function generators results in improved precision and better thermal stability of the circuit. Decreasing output slopes can be obtained from increasing input signals. The design philosophy involved is somewhat different from the usual one...

The theoretical analysis shows that if the assumption of the constant tray efficiency of a rectification column is included in the mathematical model, the relation between thermal input and reflux ratio has a character of an unambiguous and monotone function.