An equation which describes the flow of energy in energy conservative semi- and full discretizations of hyperbolic equations is derived. While the form of this equation for semi-discretizations verfies known principles of group velocity and wave propagation in periodic structures, its form and...

In [4] it is shown that the Preconditioned Simultaneous Displacement (PSD) method when applied to σ2-ordered systems of linear equations may be preferred over the Successive Overrelaxation (SOR) method in certain cases whereas it is undoubtedly superior over the symmetric SOR (SSOR) method. In...

One step integration methods, using K function evaluations, for the solution of a system of ordinary differential equations dv/dt=A⋅v are evaluated. A general expression for a class of methods is found for all positive integers K. This class of methods is proven to maximize the interval on the...

An estimate of the accuracy of linear regression is given for instrumentation data where the signal is integrated and DPCM-quantized before processing.

Some theoretical and practical aspects of common random numbers (CRN) for variance reduction in simulation analysis are considered. A simple proof of the optimality of CRN is presented and the efficiency of this technique for variance reduction is discussed. Applications of CRN to production...

This paper describes means of constructing and organizing simulation experiment with dynamic stochastic queuing network models (QNSM). The questions of creating additional technological possibilities of queuing network control, modeling systems with unreliable elements and using various types of...

It is hard to fly an RC helicopter desirably because of its dynamical instability and the fast responce of motion, so that some stabilizing control system has to be developed. The first step of design is the derivation of the mathematical model. Dynamics of a helicopter is much complicated due...

In this paper, an attempt was made to put together major results of sensitivity theory as they relate to network and systems analysis. This exposition is theoritical and it is hoped that it will stir some interest among engineers to try to apply these results to actual system designs. Some...