No. 4, 2003

Information Technologies in Control

Volghin L.A., Klimovsky A.B. Implicative Algebra of Choice as a Base of Information Technologies and Control Systems in Continuum Domain (pp. 2-5)

Abstract. The paper considers new lines of investigation in theoretical information and mathematical cybernetics (continual algebraic logics – special algebrae and general logics) and in analog computing machinery (relator circuitry) aimed at solving computational control tasks on the basis of universal logical-and-algebraic tool of implicative choice algebra.

Zatuliveter Y.S., Fischenko E.A. Organizathion of Distributed Calculations in PARSEC Programming System with the Example of Digital Video Compression (pp. 6-10)

Abstract. The paper examines a new approach to the distributed calculations organization in the Internet, based on the mathematically complete and closed model of tree-type structures calculus, realized by means of PARSEC programming system. The PARSEC language is supplemented with the operators for resources administration and bulk data transfer. The effectiveness of the proposed net resources control technique is shown by the example of real-time compression encoding for H.261 videoconferences and for MPEG digital video.

Abramov O.V., Katueva Y.V. Multivariant Analysis and Stochastic Optimization Using Parallel Processing Techniques (pp. 11-15)

Abstract. The problem of choosing optimal parameter values for analog devices and systems is considered. Special attention is paid to the algorithms that reduce the computation cost of optimization problem. Several parallel techniques for multivariate analysis and stochastic optimization are discussed.

Zakrevsky A.D. Effective Techniques for Finding the Shortest Solution of Linear Logic Equations (pp. 16-22)

Abstract. The paper offers effective techniques that considerably reduce the amount of searching performed for finding the shortest solution of linear logic equations. It presents software implementation results, estimates the competitiveness of the programs developed and discusses their application areas.

Systems Analysis and Data Processing

Grebenyuk E.A. Analysis and On-Line Diagnostics of the Systems Described as Nonstationary Stochastic Processes (pp. 23-29)

Abstract. The problem of detecting the changes in the properties of cointegrated nonstationary processes is discussed. A cumulative sum algorithm is offered for detecting the cointegration loss. The effectiveness of the approach proposed is demonstrated with the solution to the problem of analyzing a group of Russian market indices described as nonstationary time series.

Bakhtadze N.N., Nazin A.V. Virtual Analyzers of Marketing Information in an Enterprise Management System (pp. 30-35)

Abstract. The paper solves a commercial budgeting problem. It offers virtual analyzers for marketing information based on parametric identification and inventory control algorithms and models under incomplete a priori information and random supplies.

Kleparsky V.G., Efremov V.A. Multifractality, Dissipation and Stability of the Middle-Term Stock Market Trends (pp. 36-38)

Abstract. The paper studies basic regularities of the switching activity in process of returning the stock-market to the initial channel of the system’s evolution. It reveals two distinctive features of the return intervals. The first feature is the minimization of the fractal dimension of the evolution trajectory, while the second one is the minimization of intermittency index.

Reliability and Technical Diagnostics

Vedeshenkov V.A. System-Level Self-Diagnosis of Reconfiguraиду Systems (pp. 39-51)

Abstract. The paper presents a system-level self-diagnosis (SD) method for the components (modules and communication lines) of reconfigurable systems with multiple hard failures of several components. The method is based on the expanding domain assumption. An example of 2 failed components SD in a 2-fault-tolerant system is adduced.

Mikrin  E.A., Pelikhov V.P. Contingency and Software Criticality Analysis in International Space Staion Projects (pp. 52-54)

Abstract. The paper classifies basic types of contingencies, which might take place at the long-functioning space station. It also defines and describes key features of critical functions performed by space station’s automatics and software. The software is categorized by danger classes according to NASA and ESA requirements.

Problem-Oriented Control Systems

Zhozhikashvili V.A., Bilik R.V., Vertlieb V.A., et al.Open Queuing Systems with Speech Recognition (pp. 55-62)

Abstract. The problem of wide audience access to information is discussed. The paper introduces the idea of an open queuing system and discusses the application of speech recognition technology to organize a voice interface for information systems. The existing system with the access to databases via the phone is described.

Kalashnikov L.M., Malyshev G.V., Svotin A.P. The Control of Two-Module Space Rope System Rolling (pp. 63-66)

Abstract. The problem of rolling a space rope system by controlling the rope tension is considered based on the following assumption: the system is revolving along the circular orbit; it consists of 2 modules connected with a imponderable and nonelastic rope and is in the state of either libration or vertical stable equilibrium. A tension control program is proposed that presumes the availability of basic trajectory and multiparameter control relative to it.