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RT&A 2014, # 1(32) Vol.9


 

IN MEMORY OF PROFESSOR IGOR USHAKOV

BORIS VLADIMIROVICH GNEDENKO. MEMOIR AND BIBLIOGRAPHY (on Russian)

prepared by D.B. Gnedenko

Boris Vladimirovich Gnedenko (Russian: Áîðè́ñ Âëàäè́ìèðîâè÷ Ãíåäǻíêî; January 1, 1912 – December 27, 1995) was a Soviet mathematician and a student of Andrey Nikolaevich Kolmogorov. He was born in Simbirsk (now Ulyanovsk), Russia, and died in Moscow. He is perhaps best known for his work with Kolmogorov, and his contributions to the study of probability theory, such as the Fisher–Tippett–Gnedenko theorem. Gnedenko was appointed as Head of the Physics, Mathematics and Chemistry Section of the Ukrainian Academy of Sciences in 1949, and also became Director of the Kiev Institute of Mathematics in the same year. Gnedenko was a leading member of the Russian school of probability theory and statistics. He also worked on applications of statistics to reliability and quality control in manufacturing. He wrote a history of mathematics in Russia (published 1946) and with O. B. Sheynin the section on the history of probability theory in the history of mathematics by Andrei Kolmogorov and Adolph P. Yushkevich (published 1992). In 1958 he was a plenary speaker at theInternational Congress of Mathematicians in Edinburgh with a talk entitled "Limit theorems of probability theory". We publish his short memoir and updated bibliography.

Dmitry A. Maevsky, Svetlana A. Yaremchuk, Ludmila N. Shapa

A METHOD OF A PRIORI SOFTWARE RELIABILITY EVALUATION

In the given paper a method of a priori evaluation of the amount of latent faults,  the estimated latent defect density and their determination probability in  Software before  testing process is described. The possibility of the method usage for different schemes of the Software development process has been found. The a priori estimation of these reliability indexes makes the management decisions at the stage of testing more effective.

Farhadzadeh E.M., Farzaliyev Y.Z., Muradaliyev A.Z.

COMPARISON PARAMETERS AVERAGE AND INDIVIDUAL RELIABILITY EQUIPMENT

OF ELECTROPOWER SYSTEMS

Existing comparison criteria average values of random variables of general population cannot be used at comparison of average random variables of multivariate data. The method, algorithm and an example of calculation of critical values recommended statistics offered.

Eugeny Y. Kolesnikov

UNCERTAINTY OF PROBABILITY COMPONENT OF ACCIDENTAL RISK

Concept of accidental risk is intended to be an objective measure for assessing the risk of accidents in the technosphere. Metric of risk should combine estimation both probability (possibility) of the accident and the damage it caused. For various reasons, any parameter of risk has uncertainty. The problem of uncertainty quantifying arose very early in the study of accidental risk. Often used in practice dotted (scalar) estimation of probabilistic component of risk metric are in most cases inadequate since embody great internal uncertainty.

Damodar Garg , P S Sarma Budhavarapu, Sudhangshu C

RELIABILITY BASED METHODOLOGY FOR VENDOR SELECTION - A CASE STUDY

The objective of every industry is to manufacture and supply products that will perform its intended functions without fail in the actual field. A reliable design (there is a misconception that a reliable design will always give a reliable product) may not necessarily turn out to be a reliable product always. Even if a product having reliable design is manufactured and used in the field its reliability may be unsatisfactory. The reason for this low reliability may be the product was poorly manufactured by using substandard manufacturing processes. Therefore to produce a reliable product, evaluation of manufacturing processes or vendors is necessary. In this work an attempt has been made to formulate a methodology which will help in evaluating the design reliability as well as the vendor selection process. The proposed methodology includes reliability prediction to effectively predict the design reliability and HALT (Highly Accelerated Life Testing) for vendor selection by qualitatively comparing the prototypes of same design manufactured by different vendors. A case study on a power electronic product is included to explain the methodology.

Smagin V.A.

OPTIMUM LIKELIHOOD QUANTIZATION OF THE INFORMATION IN SPACE WITH RESTRICTION OF ZONES OF INFLUENCE OF QUANTA

The model of optimum three-dimensional likelihood quantization of the determined or casual volume space is offered by set of equal quanta at which the probability of representation quantized reaches spaces of the maximum value. The size of optimum quantum is defined by distribution of its zone of influence, values of boundary probability and influence parameter. The model of estimation of quantity of the information or other product in quantization space is entered.

Boyadjiev V. I.

EXPERIMENTAL STUDY OF THE REPAIRS OF HYDROPNEUMATIC PARTS OF COMPLEX TECHNICAL OBJECTS

Hydropneumatic part of each complex technical object has its own specifics. It determines the specifics of the repair work on that part. Based on possesses collected information from experimental study about the failures in hydropneumatic part of a typical complex technical subject - machine tool by CNC. Synthesized are conclusions and recommendations for enhancing the effectiveness of using recreational events.

RESOLUTION BY SCIENCE AND APPLICATION MEETING MODERN APPROACHES TO ELECTRIC POWER SYSTEM RELIABILITY SUPPORT, SYKTYVKAR, 22-23 MAY, 2013

 

 

 

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