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Submit scientific paper, scientific publications, International Research Journal | Meždunarodnyj naučno-issledovatel’skij žurnal

ISSN 2227-6017 (ONLINE), ISSN 2303-9868 (PRINT), DOI: 10.18454/IRJ.2227-6017
ПИ № ФС 77 - 51217

VISUAL REPORT DESIGNER FOR MULTIDIMENSIONAL DATA ANALYSIS

Posted in 2017, ENGINEERING, Issue № 4(58) April 2017 | 0 comments

The paper describes the possibility to extend the capabilities of information systems using Firebird database server by connecting the additional tool – a visual design tool. The problem of multidimensional data analysis is considered, the concepts and technologies underlying the business analysis are presented in the paper as well. The design of the software product is performed with the help of graphic tools of UML. The basic principles of use and functionality of the software product are described when working with labor market monitoring data in the Tyumen region.

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TECHNICAL AND ECONOMICAL ASSESSMENT OF STAND-ALONE RENEWABLE POWER SYSTEM PROJECTS

Posted in 2017, ENGINEERING, Issue № 3(57) March 2017 | 0 comments

The problem of optimal choice of the unit commitment for decentralized power supply systems is considered. During the choice, we consider not only the parameters of main and supplementary equipment, but also the external factors of the system operation, such as weather parameters and changes in the load. The net present value is accepted as a key optimality criterion, since it is the most accurate financial indicator of renewable power system projects.

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MODELING PERMANENT DEFORMATION ACCUMULATES IN THE COATED MACADAM MATERIALS FARM ROADS

Posted in 2017, ENGINEERING, Issue № 3(57) March 2017 | 0 comments

Application of integral equations of the theory of heredity derive formulas allowing to calculate the irreversible deformation accumulated crushed stone materials used in structural layers of coatings and bases of road clothes of farm roads. This approach yielded logarithmic model with one or two parameters of the material and the degree of the model, including two or three parameters of the material. To determine the parameters of the material power and logarithmic models analyzes data triaxial crush materials made in dynamic devices triaxial, allowing to explore the process of accumulation of permanent deformation under the effect of repeated loads

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APPLICATION OF ORTHOGONAL MODELS OF TENSOR ANALYSIS FOR QOS RESEARCH IN SDN

Posted in 2017, ENGINEERING, Issue № 3(57) March 2017 | 0 comments

The concept of software-defined networks (SDN) was introduced in 2006, but until now, not much attention was paid to it. When it became clear that it would be difficult in the near future to ensure the needs of users at the current development of the Internet industry, the SDN technology began its rapid development. An important issue in this field is to ensure the quality of service (QoS), such as QoS parameters like channel loading, time loss, etc. which eventually affect the end users. This paper considers the use of orthogonal tensor analysis models for the study of SDN networks. In the study the authors calculated the load of each branch of the network using orthogonal method of tensor analysis. The obtained results lead to a conclusion about the applicability of the mathematical apparatus as a basic research tool for such networks, as well as conclusions about the peculiarities of the traffic distribution in the study of SDN network.

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OPTIMIZATION OF HIGH-SPEED MILLING OF FEATHER FOR COMPRESSOR OF GAS-TURBINE ENGINE (GTE)

Posted in 2017, ENGINEERING, Issue № 3(57) March 2017 | 0 comments

The paper presents the results of the study of a new milling method for a feather of a gas turbine engine compressor. It was performed the complex optimization using CAD/CAM technology for designing and manufacturing of the detail. A new milling method of feather is proposed as well – a helical machining with special cutting tool. The authors developed optimal modes of processing, which consider the workpiece deformation under the influence of the cutting forces. It was carried out the research which proved the effectiveness of the proposed method. The introduction of the proposed method into the technical process of manufacturing of compressor blades has significantly increased its technical and economic indicators. The proposed technology of feather processing was tested in one of the companies and it received a positive assessment.

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WAYS OF IMPROVING THE EFFICIENCY OF FIBER CONCRETE

Posted in 2017, ENGINEERING, Issue № 3(57) March 2017 | 0 comments

Ensuring the effectiveness of the construction, reconstruction and repair of transport facilities can be achieved using fiber concrete, having high deformation properties. This article describes the use of complex additives to optimize fiber concrete structure with high deformability properties. It has been found that the use of chemical additives and a fine fiber concrete composition greatly increases the compressive strength and flexural strength. This is related with use of steel fiber which makes available concrete reinforcement on whole volume equally; therefore it positively affects on distribution of voltage in concrete and led to decrease of voltage dangerous places.

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