Showing papers in "Mathematics and Computers in Simulation in 1984"

TL;DR: A practical application of the Adaptive Random Search strategy to automated registration in medical nuclear imagery and some modifications, which were found to improve the efficiency and versatility of the method are presented.

TL;DR: One step integration methods of third and fourth order accuracy that use K function evaluations to solve the system of differential equations d y d t = A · y are proposed in this article with a hyperbolic stability limit of y (K − 1)2 − 1 which approaches the theoretical maximum limit of K − 1 at large K obtained for methods of lower order accuracy.

TL;DR: In this paper, a general expression for a class of one-step integration methods is found for all positive integers K, and it is proven that every method with this optimal stability property has a polynomial M defined by y 1+, Δt = M ⋅ v i for which M (iS l )= exp ( iS l π /2) where S l = K − l.

TL;DR: In this article, a pH-process difficult to control was constructed for testing different kinds of pH- control algorithms, and the pH-model comprised a linear mixing model of concentrations and an implicit state-linear output model describing the equilibrium conditions of the liquid.

TL;DR: The mathematical model of a hovering RC helicopter is derived and its validity is confirmed experimentally by designing the stabilizing control system of the gimbal equipment which has three degrees of freedom, rolling, pitching and yawing.

TL;DR: In this paper, a simple proof of the optimality of CRN is presented and the efficiency of this technique for variance reduction is discussed, while using stochastic approximation is given.

TL;DR: This paper defines a generalised form of PSD and the produced scheme, and proves that under these conditions PSD possesses a rate of convergence which is asymptotically twice as fast as SSOR, a result which is also valid for σ2-ordered systems.

TL;DR: In this article, the authors deal 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.

TL;DR: The models considered in the paper have been used for treating various design problems of multidimensional systems such as model mathing, transfer function separation, etc., as can be seen in the corresponding references.

TL;DR: In this paper, an equation which describes the flow of energy in energy conservative semi-and full discretizations of hyperbolic equations is derived and applied to discrete-time systems.

TL;DR: The main purpose of the SASSYS code is to analyze the consequences of failures in the shutdown heat removal system of a liquid metal cooled fast breeder reactor as mentioned in this paper, which is also capable of analyzing a wide range of transients, from mild operational transients through severe hypothetical core disruptive accidents.

TL;DR: In this article, an extension of the vector-network method to rigid body systems in 3D is introduced, with its computational implementation, with the aim of eliminating the work of analytically modelling a dynamic system in order to generate its time response.

TL;DR: A brief survey of general methods that have been used, are being used, and will be used to obtain approximate solutions of several classes of random integral equations can be found in this paper.

TL;DR: Computer networks supply distributed applications in both wide area and local area environments and need deep investigation: the communication structure among processes resident in separate computers and the management structure.

TL;DR: In this article, a stream water quality simulation is linked with a treatment cost minimization model in order to capitalize on the unique adventage of each in managing river basin water quality.

TL;DR: In this article, a numerical one-dimensional model was designed to simulate the diurnal changes of the greenhouse environment taking into consideration a soil layer, a vegetation layer, an air layer and a cover.

TL;DR: In this article, a comparative analysis of stiff and elastic tie-line models used to simulate load-frequency control of two-area interconnected power systems is performed, and after the extension of the models to multi-area case, the lack of asymptotic stability of elastic tie line models for certain interconnected structures is shown.

TL;DR: New methods of solving problems of implementing any optimization method on a computer by determining the satisfactory computed solution and being sure the computer cannot provide a better one are presented.

TL;DR: In this article, a weak formulation of linear two-point boundary value problems is introduced, which is suitable for hybrid computation, and the factorization method is applied to the problem.

TL;DR: This paper shows that obstructions in two fluid flow have the effect of homogenizing the two fluid mixture, resulting not only in a more uniform phase distribution, but also in a significant reduction of the ratio of fluid velocities.

TL;DR: In this paper, a method for sampling the outcome population size of a birth and death process running over a specific duration of time for an arbitrary starting population size is given by treating two cases depending on the size of the starting population.

TL;DR: In this paper, the authors consider stochastic systems which are modelled by Brownian motion on a Riemannian manifold and show that the exit time of a geodesic ball is less than the exit times of a small geodesicle of the same radius in the space of constant curvature.

TL;DR: Construction d'un modele hybride par couplage dynamique de modeles physique and dynamique en vue de prevoir l'influence de barrages sur le regime des mares de la baie de Fundy.

TL;DR: The paper describes language UMS for manipulation task programming and manipulation systems teaching and the approach to the trajectory synthesis with motion statements is described.