In recent years several numerical techniques have been developed for the solution of partial differential equations containing both convective and diffusive terms. One such equation is the convection-diffusion equation and numerical techniques for the solution of this equation are usually based...

This paper presents an algorithm determining the invertibility of any planar, triangular quadratic isoparametric finite element transformation. Extensions of the algorithm to three-dimensional isoparametric finite element transformations yield conditions which guarantee invertibility of 10-node...

A sea system model, comprising marine environment and a particular fisheries object is considered. Used are the principles of the self-instructing modelling for long-term prediction of the fisheries object's strategy with respect to varying environment parameters, which are being assessed in...

Some fixed-node finite-difference schemes and a finite element method are applied to a reaction-diffusion equation which has an exact traveling wave solution. The accuracy of the methods is assessed in terms of the computed steady state wave speed which is compared with the exact speed. The...

This paper presents concepts and tools for simulation softwares specification. At an abstract level of specification, we define a simulation software as a couple (conceptual structure, abstract machine). The conceptual structure is a structured representation of the simulated system behaviour....

Estimation efficiency is an increasingly important issue in the design and analysis of large-scale simulation experiments. This paper surveys recent research on the major variance reduction techniques that have been developed for or adapted to Monte Carlo studies. Current unresolved problems and...

This paper concerns the application of adaptive random search techniques to large parameter optimization and identification problems. A brief review of the algorithm is presented, followed by a discussion of 3 examples: (1) identification of 25 unknown parameters in a nonlinear 5-degree of...

Linear black box modelling often requires an inductive model structure characterization method or expressed in other terms a technique that permits for the determination of the order of the model on the basis of experimental data. Recently a number of different methods like FPE, AIC, LILC and...

This is a study of a legislative conflict over the National Health Insurance policy played out in the 96th Congress of the United States. It attempted to find out whether the policy aimed at restructuring the U.S. health care system was possible. Since previous analysis concluded that the...