Application of Fuzzy Variables for Systems of Management Decision Support

The following article describes an approach covering the variety of opinions and uncertainties of estimates within the chosen technique of decision support. Mathematical operations used for assessment of options are traced to operations of working with functions that are used for assessment of possible options of decision-making. Approach proposed could be used within any technique of decision support based on elementary mathematical operations. In this article the above-mentioned approach is described under analytical hierarchy process

Measuring of residual stress in of light guide fiber glass microzones by means of polarized-optical method

Робота присвячена визначенню напружено-деформованого стану (НДС) в мікрозонах скловолокон світловодів поляризаційно-оптичним методом. Зокрема, розглядаються питання модернізації мікроскопічної техніки з метою можливості використання методів фотопружності, аналізу інтегральної оптичної картини смуг та визначенню НДС як розв'язку просторової осесиметричної задачі і отриманню компонент тензору напружень у мікрозонах скловолокон.The article is devoted to the measuring stressed – strained state (SSS) in microzones of light guide fiber glass by means of polarized–optical method. The problems of microscope equipment updating in order to use the methods of photoelasticity, integral optical patterns analysis of bands and determining SSS are discussed in particular. They are the solution of space axis-symmetric task and production the component of stress tensor in fiber glass microzones

Dependence of Nanoparticles Synthesis Energy Consumption in the Gas Spark Discharge on Circuit Parameters

In this paper, we study the specific energy of titanium dioxide nanoparticles synthesis in a spark discharge in the air by varying the parameters of a discharge circuit. The dependence shows a maximum at a capacitor voltage of about 2 kV and a monotonic decrease with increasing voltage

Dynamics of spatial coherence and momentum distribution of polaritons in a semiconductor microcavity under conditions of Bose-Einstein condensation

The study was supported by the Russian Foundation for Basic Research (project nos. 12-02-33091, 13-02-12197, and 14-02-01073) and the Presidium of the Russian Academy of Sciences. The work of V.V.B. was supported in part by a scholarship of the President of the Russian Federation.The dynamics of spatial coherence and momentum distribution of polaritons in the regime of Bose-Einstein condensation in a GaAs microcavity with embedded quantum wells under nonresonant excitation with picosecond laser pulses are investigated. It is shown that the establishment of the condensate coherence is accompanied by narrowing of the polariton momentum distribution. At the same time, at sufficiently high excitation densities, there is significant qualitative discrepancy between the dynamic behavior of the width of the polariton momentum distribution determined from direct measurements and that calculated from the spatial distribution of coherence. This discrepancy is observed at the fast initial stage of the polariton system kinetics and, apparently, results from the strong spatial nonuniformity of the phase of the condensate wavefunction, which equilibrates on a much longer time scale.Publisher PDFPeer reviewe

Planning and Management Tasks of Innovation Projects in Production and Economic Systems

The chapter describes an approach for design and sufficient analysis of management and information models by implementing product innovation projects in production and economic systems (PESs). The obtained model and the set of parameters for project evaluation are unique and depend on the specific features of project, decision-maker preferences, and PES project. This chapter also broadly outlines criteria-based approaches to measure production risks and evaluate risks associated with PES planning. Embodied principles help to design specific simulation models and provide information support for sufficient decision-making in PES that was newly introduced at an enterprise and/or on the basis of available data systems

Time Factor in Operation Research Tasks for Smart Manufacturing

The shift to the concepts Industry 4.0 and IIoT helps collect a vast amount of objective data about processes that take place in a production system, and thus, it creates background for taking advantage of theoretical results in practice; it is a trend towards synchronizing production system processes and external (market) processes in practice. In order for the target to be achieved, we use the methods that formalize management tasks in the form of predictive models, consider the cases with the computational solution of management models and decision making in production system tasks which are set based on time factor and are solved by approximate methods. We also take a look at the problems of probabilistic nature of gained decisions and address the cases, when by computational solution of tasks we need to take into account restrictions and select time step in order to obtain the decision in a table form of the function of time. The problems that we investigate help obtain and solve management tasks of production systems with help of forecasting data for a group of indices that are involved in decision making – this all helps enhance the sufficiency and quality of management decisions

Технические железнодорожные училища и ремесленные железнодорожные курсы

 News from the archivesThe article in Rail Business [Zheleznodorozhnoe Delo] published 110 years ago, in 1911, analysed in detail the organisation, in modern terms, of professional training and high vocational education of railway employees. Besides, it contains the opinion on curriculum, range of taught disciplines, qualifications, competences, and skills.  Пресс-архивПубликация в журнале «Железнодорожное дело» за 1911 год, то есть 110 лет назад, самым подробным образом анализировала организацию подготовки технических специалистов для железных дорог, как мы сказали бы сейчас, на базе профессионального обучения и среднего  профессионального образования. Более того, приводятся взгляды на содержание обучения, набор востребованныхдисциплин, квалификации, компетенции и навыки.