A numerical technique has been developed to solve the time-dependent equation of continuity of plasma for the ionosphere. The solution of the equation gives the behaviour of electron density at any time of the day of the year. A computer program for this has been developed which has been used to...

Computer networks supply distributed applications in both wide area and local area environments. Two main problems exist in computer networks and need deep investigation: the communication structure among processes resident in separate computers and the management structure.

This paper deals with the problem of defining and analysing a general mathematical model for the analysis of physical systems described by ordinary stochastic differential equations with random coefficients and initial conditions. The existence, continuity and stability of the evolution process...

This paper, written from a user stand-point, advocates the Adaptive Random Search strategy as an efficient tool for global optimization. First is presented a brief overview of the various types of methods available in the literature for global optimization, and practical advantages of the random...

A numerical one-dimensional model was designed to simulate the diurnal changes of the greenhouse environment. The model takes into consideration a soil layer, a vegetation layer, an air layer and a cover. The thermal radiative, sensible, latent and conductive heat fluxes were modeled in each...

The purpose of this article concerns the modelling of the thermal behaviour of an epitaxial reactor. Numerical simulations (FORTRAN and CSMP III) are very useful for testing the validity of simplified models obtained from a complex non linear distributed parameter system.

In the paper the computer solution of partial differential equation increasing in head-on collision problem has been discussed. Mathematical model of phenomenon, which is based on the concept of dispersion theory of stress waves in straight rods upon axial impact, in the form of one-dimensional,...

A comparative analysis of stiff and elastic tie-line models used to simulate load-frequency control of two-area interconnected power systems is performed. Then, after the extension of the models to multi-area case, the lack of asymptotic stability of elastic tie-line models for certain...

Many distributed-parameter systems consist of interconnected subsystems involving fast and slow physical phenomena or reducing to a number of independent subsystems when a scalar parameter ε is zero. The purpose of this paper is to treat the control of such systems by invoking the ε-coupling...