The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The adequate mathematical model of diesel locomotive cooling device is offered. The solution of this model is received by numerical method of calculation. The optimization criterion and the method of accounting the influence of aerodynamics on heat exchange process are offered.
The paper presents the structure of the database and methods for determining the necessary parameters of the properties of substances used for modeling the consequences of accidents at high-risk enterprises. The formulas for the approximation functions of thermophysical parameters and methods for obtaining the coefficients for them, as well as the formulas and methods for obtaining the coefficients...
The new approach to the determination of the economic security of the science-based project - oriented enterprises is considered. It is based on determination of management efficiency of the intangible component of their value. The rates of height of factors of value are used as indicators of the management efficiency estimation. They reflect the state, positive and negative influence, and purposeful...
The paper is dedicated to researches of influence of thermal treatment to quality of rolls’ core. It has been established that high temperature of heating promote to changes in metal base of such material. It has been showed that such structural changes do not reduce properties’ level of core of rolls.
This article considers the questions of creating the Euro-region on the example of Lugansk region, Ukraine. International, inter-regional cooperation is an important component in the development of foreign economic relations of Ukraine. Reforming of social - economic relationships in Ukraine, structural rearrangement of all mechanisms of society vital functions creates the background for the acceleration...
In the article a method allowing to promote authenticity of methods of determination of type of defect at diagnosing of elements of carriage part of rolling stock of railways by an ultrasonic impulsive echo-method is developed.
This article is about the possibility of calculating of the small enclosures made of composite materials in CAD/CAE systems. The initial data for calculating consists of the fiber and matrix elastic constants and the fiber volume content in the composite. The stressstrain state has been obtained. The enclosure was loaded with the internal pressure.
In the article the problems and obstacles of developing information technologies of society in Ukraine are explored. The positive and negative consequences of influencing are certain and usage of the information technologies in the life of Ukrainian people. The concretes examples are considered.
Using the methods of ideal liquid aerodynamics and the theory of machines on an air cushion, the mathematical model of the traction force coefficient of the conveyor on an air cushion with sloping round channels is obtained. Compare the results of the modelling and the experimental research of the traction force coefficient of the conveyor on an air cushion with sloping round channels is carried out.
The concrete with compact structure on the basis of Portland cement modified by the dispersion of multilayer carbon nanotubes GraphistrengthTM by Arkema is investigated. The change in the structure of cement stone in the process of concrete setting and hardening when introducing carbon nanotubes into the concrete composition is observed.
The articles describes mathematical model of quality dynamics in garments industry and garments merchandising. As a result, the major identified ways and means of production to working with vibrating equipment with conditions to achieve the greatest level of quality. The algorithm of dynamic programming to achieve the minimum loss of quality in the case of work in several areas. The obtained optimal...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.