Showing papers in "Mathematics and Computers in Simulation in 1991"

TL;DR: The two-dimensional structure of objectives of organizational system is introduced and the peculiarities of the managing in enterprise are discussed.

TL;DR: In this article, the authors deal with the methodology of managing the development of large scale systems and cover problems of designing large-scale production/transportation systems and their development control, and also discuss some of the results in this field obtained by the author.

TL;DR: In this article, the authors outline a numerical technique for the solution of systems of nonlinear ordinary differential equations containing arbitrary numbers of random parameters and random initial conditions, restricted to be time-independent.

TL;DR: The role of symbolic computations in CAD of the optical devices control systems is discussed and an algebraic description of a specific optical system and the steps of the application of the algebraic computation language to the system in question are given.

TL;DR: This survey paper presents a collection of algorithms for computer generation of trajectories of some classes of stochastic processes such as various types of finite Markov chains, Markov renewal processes, Stochastic systems with complete connections, J-X processes and renewal systems withcomplete connections.

TL;DR: Application of modified importance sampling to the “what if” problem and to sensitivity analysis of discrete-event systems are given and numerical results are presented.

TL;DR: In this paper, a stream function formulation which combines grid generation and flow physics into a single equation for the transformation metric is proposed. And supercritical calculations are carried out using the modified density method to provide numerical dissipation.

TL;DR: Algorithms avoiding overflows, underflows and various sources of numerical errors are presented for complex division, modulus, logarithm, tangent and exponentiation.

TL;DR: In this article, the authors considered inverse problems for the nonlinear heat equation and proposed an approach based on suitable partitions of the one-dimensional space domain, and on piecewise cubic spline approximations of the sample functions to be determined.

TL;DR: The Ada programming language has aroused considerable attention and investment since its development during the late 1970s as mentioned in this paper, but its progress has not been smooth, due to much lower levels of state support, smaller numbers of researchers involved, almost nonexistent contact between Soviet and Western colleagues and little domestic demand for the language.

TL;DR: In this article, an elastic oscillator is modeled by a system of differential equations (zero-dimensional oscillator) and by a one-dimensional (one-dimensional) oscillator, and the relation between the solutions obtained with the two models is also discussed.

TL;DR: The possible variants of CAD system structure development is examined and these variants are based on the mainoperations of its algorithm functions and differs in its user characteristics.

TL;DR: A new interactive simulation environment for neural-network development is applied to the development of mapping networks, which produce learned or preset functions of real inputs, and DESIRE/NEUNET describes neural networks in a reasonable matrix language.

TL;DR: In this article, the application of a computer-aided control system design for a freeze-hole drilling system is described, and the discrete model of the drilling operation based on the constant energy methods of Fullerton, coupled with the hydraulic program and steering program for a solids control system for different drilling situations.

TL;DR: The Soviet software engineering methodology R- technology is examined, and R-technology is considered as a product in the context of the Soviet software industry.

TL;DR: This paper presents an approach to the creation of a specialized system for dynamic control on microcomputers based on the description of the doctor-expert knowledge, and upon the use of this knowledge for dynamic situations interpretation.

TL;DR: In this article, a numerical approach to evaluate the DF based on the Gaussian quadrature of Chebyshev is given, which has the advantage of being applicable to functions in conditions that are less restrictive than the polynomial expansion or Fourier series expansion.

TL;DR: In this article, the effects of total and partial decouplings in conjunction with Euler's one-step implicit and explicit schemes for linear singularly perturbed system are considered, and it is shown that in some cases the equations obtained by decoupling the system of difference equations for such problems might lead to inverting ill-conditioned matrices.

TL;DR: In this paper, a form management system is used for illustration, and some usage examples are also presented.

TL;DR: Details are given on the main ideas of SATT methodology - in comparison with other systems - and on an IBM PC implementation of the programs (PC-SATT-DOC).

TL;DR: LATOR is a general purpose database management system for establishing and maintaining a database environment for a set of computers connected in a local area network that preserves consistency of data structures automatically.

TL;DR: A unique information interaction mechanism between the moduli in the scenarios, allowing on-line changes in the information flow, was developed and the language is problem-independent, and can be used in various problem domains.