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Thanh Viet Nguyen,A.G. Kravets
Pág. 49 - 62
To achieve competitiveness in a rapidly changing science, it is important to follow the development of existing technologies and discover new and promising technologies. Firms need to develop a technology development strategy by predicting technology tre...
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Josyp Luchko,Vitalii Kovalchuk,Ivan Kravets,Oleksiy Gajda,Arthur Onyshchenko
Pág. 6 - 13
The technical condition of the railroad track subgrade has been analyzed, as well as the issues related to ensuring its strength and stability when exposed to floodwaters and when the track's sections are overmoistened during operation. As a result, it h...
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Svyatoslav Kravets,Vladimir Suponyev,Aleksej Goponov,Serhii Kovalevskyi,Andrii Koval
Pág. 23 - 28
The presented results of scientific research are aimed at increasing the efficiency of trenching for laying the utility lines using new less energy-consuming technologies of excavating the soil with the working equipment of multi-scraper excavators.The p...
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Oleg Jakovlevich Kravets,Igor Viktorovich Atlasov,Vladimir Dmitriyevich Sekerin,Anna Evgenievna Gorokhova,Sergey Kurbanovich Gasanbekov
When examining a large group of people and provided that very few people get sick (the probability of a disease), there is a technique to diagnose the disease that allows reducing the use of drugs necessary for diagnosing the disease. A set of all people...
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Elena Kravets
Pág. 28 - 37
The paper reports a three-dimensional numerical solution to the test problem about a viscous incompressible liquid flow in the closed square-shaped cavity with a movable upper face. Disadvantages in a mathematical statement of the problem about a flow of...
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S. V. Kravets,O. P. Posmitjukha,V. M. Suponyev
Pág. 89 - 97
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V. V. Kravets,V. V. Kravets,T. V. Kravets
Pág. 155 - 160
The system of four quaternion matrices for presentation of main relationships of the theory of final rotation, kinematics and nonlinear dynamics of an asymmetric solid body in a three-dimensional space is presented. By means of application of equations i...
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V. V. Kravets,T. V. Kravets,O. V. Kharchenko
Pág. 154 - 158
A set of direct and inverse elements are examined and compared with a four-dimensional orthonormal basis. The aggregate of even substitutions of fourth power as a product of two transpositions are formed on this finite set. The finite set of substitution...
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V. V. Kravets,T. V. Kravets,O. V. Kharchenko
Pág. 41 - 45
A computation algorithm for inertia matrix of wheel pair taking into account the manufacturing inaccuracies is suggested. It is based on quaternion matrices, which take into consideration the skew of symmetry axes and the shift of substructures within pe...
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P. H. Gorbulia,V. V. Kravets,O. N. Reva
Pág. 84 - 91
The article presents one of possible directions of raising economic efficiency of the boiler-house in Dnipropetrosvk State Technical University of Railway Transport.
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