Time filter

Source Type

Moscow, Russia

Chernoyarov O.V.,Moscow Energy Institute
Telecommunications and Radio Engineering (English translation of Elektrosvyaz and Radiotekhnika)

The maximum likelihood method was used for synthesizing and analyzing algorithms for detection of a broadband noise pulse signal with some loosely known duration and for assessing its time and energy parameters. The effect of abnormal errors on the arrival time estimation accuracy is discussed. Computerized statistical modeling methods were used to identify the operability of the proposed detector and measurer and determine the boundaries of application of asymptotically accurate formulas for their characteristics. © 2013 by Begell House, Inc. Source

Lopatin D.V.,Moscow Energy Institute
Gornyi Zhurnal

Modern energy efficient mechanisms of management at Russian and CIS mining enterprises are insufficient and ineffective, which is clearly expressed in most energy intensity branches of industry. Complex structure of mining, as well as incomplete systems of control, accounting and analysis of energy resources consumption are the main reasons of high energy intensity. Up to date, the issues of management of energy resources consumption, energy saving and increasing of energy efficiency have been considered only as the technical issues with obvious underestimation of usage of the management theory. For this reason, results of energy saving and increasing of energy efficiency at most enterprises are not so great as they might have been. Analysis of foreign experience in formation of organizational and administrative measures for implementation of national programs of increasing of energy efficiency in mining industry shows the important function of energy management mechanisms, based on requirements of International Standard ISO 50001:2011, by the example of uranium mining enterprises of Republic of Kazakhstan. This article considers the industry performance issues, analysis of energy consumption at certain mines, and proposed system of energy efficient mechanisms of management (based on requirements of International Standard ISO 50001:2011). There is also considered the analysis of possibility of usage of local alternative energy sources, which are prospective for application in energy isolated areas, according to the climatic conditions of region. Implementation of system of energy efficiency management at uranium mines of Republic of Kazakhstan requires the solution of the following tasks: o research and specification of natural and climatic conditions, which cause the disruptions in supplies of electric power and diesel fuel and make some difficulties in identification of the development directions of enterprises at managerial and technological levels; o systematization and realization of energy saving reserves due to implementation of organizational innovations in the form of effective mechanisms of energy management and technical innovations, aimed at improvement of energy efficiency; o development and implementation of technically and economically justified projects of alternative energy for the purpose of improvement of reliability of the enterprises functioning and reduction of dependence from foreign energy supplies in specific climatic conditions. Source

In this study, the reasons for breakdown in welding electron beam guns are investigated. The main factors influencing the time characteristics of discharge current are analysed. A model is developed for investigating the breakdown conditions in the electron beam gun. The results of investigations of the effect of reactive parameters of the power source on the time characteristics of current and voltage in different parts of the circuit are presented. © 2012 Copyright Taylor and Francis Group, LLC. Source

Zhavrin Yu.I.,Al-Farabi Kazakh National University | Kosov V.N.,Kazakh National Pedagogical University | Poyarkov I.V.,Moscow Energy Institute | Asembaeva M.K.,Al-Farabi Kazakh National University | And 2 more authors.
Journal of Engineering Physics and Thermophysics

The temperature dependences of the effective diffusion coefficients of the components of three-component gas systems, used in the synthesis of ammonia, were calculated in the temperature range 298-800 K. The results obtained can be used as reference data. © 2013 Springer Science+Business Media New York. Source

Kryukov A.P.,Moscow Energy Institute | Levashov V.Y.,Moscow Energy Institute | Pavlyukevich N.V.,A. V. Luikov Heat And Mass Transfer Institute
Journal of Engineering Physics and Thermophysics

A brief analysis of different approaches to the calculation and measurement of the condensation coefficient of a vapor is presented. It is shown that, on frequent occasions, calculations give values of this coefficient that are at variance with the corresponding experimental data and that the condensation coefficient is determined most exactly on the basis of the molecular-kinetic theory. It was established that the spread in the literature data on the measured values of this coefficient is explained mainly by the fact that these values were obtained not in the immediate vicinity from the boundary between the gas and liquid phases but at a large distance (as compared to the mean free path of molecules) from it. Results of calculations of the condensation coefficient of argon by the method of moleculardynamic simulation are presented. © 2014 Springer Science+Business Media New York. Source

Discover hidden collaborations