East European Scientific Journal

REINFORCED CONCRETE ORTHOTROPIC SLABS CALCULATION

T. Azizov , O. Orlova — Wed, 16 Feb 2022 00:00:00 +0300

The formula for determining the coefficient that allows to determine the torsional stiffness of the rods is suggested. In this case, the system of perpendicular beams becomes equivalent to a solid slab. Verification of the formula in the numerical implementation of the technique in software complexes shows almost complete coincidence of the deflections of the system of intersecting beams with the deflections of the solid slab. It is important to conclude that when calculating an orthotropic plate with the help of a rod approximation, it is sufficient to determine the bending stiffness of the rods of both directions, and to take the torsional stiffness equal to these bending stiffness. In the future, it is assumed to check the accuracy of determining the deflections with a local change in the stiffness of the rods on a small section of the slab.

CONCEPTS, APPLICATIONS AND CHALLENGES OF USING THE INTERNET OF THINGS

A. Kabarukhin — Thu, 17 Feb 2022 00:00:00 +0300

The article examines the concept of using the Internet of Things from the historical, semantic, value, performance and perspective sides. Graphically presented the principle of the Internet of Things and the objectives of its application in various fields of activity. A SWOT analysis of the concept of using the Internet of Things in modern smart cities is developed. In the most general sense, the Internet of Things is not a real worldwide network, but the concept of a network of those very "things," that is, physical and virtual objects that are connected to the Internet and the outside world. They are able to transmit the data they receive to each other in order to perform various actions based on it. However, it is not only manufacturers of "smart" equipment that are involved in the development of the concept. For the Internet of Things to function properly, many components need to work together, including communication systems, sensors, software, and technology platforms that connect devices and allow them to "see" and "understand" each other. Particular attention is paid to the comparison of Russian and international experience of using the Internet of Things and examples of its practical application (in the format of digital (applications) and real activities). Conclusions are made about the promising directions of development of the analyzed concept in the form of a smart city.

INCREASING THE CAPACITY OF RAILWAYS WITH THE INTRODUCTION OF VIRTUAL TRAIN COUPLING

M. Sorokina , О. Golubev — Thu, 17 Feb 2022 00:00:00 +0300

This article discusses the effectiveness of the implementation of a virtual train coupling on the capacity of railways. The article compares the possible ways of organizing a virtual coupling: the use of radio block centers and the use of a "virtual coupling" in the direct exchange of information between locomotives. Technical problems and technological problems that arise when implementing this technology are considered. In conclusion, the scheme of effective application of virtual coupling technology for solving the problem of increasing the capacity of railway sections is constructed. It is concluded that the task of increasing the capacity requires an integrated approach to the solution, taking into account all the technical and technological features of the road.

SYNTHESIS OF THE TURNING ANGLE IDENTIFIER ROTOR IN VECTOR CONTROL SYSTEM ASYNCHRONOUS ELECTRIC DRIVE

O. Klyuyev , V. Logvinova — Thu, 17 Feb 2022 00:00:00 +0300

The paper for a dual-feed machine, new equations of the mathematical model of the identifier of the rotor position angle are obtained, which can be used in the synthesis of vector control systems for asynchronous gate cascade. An analysis of the stability of the developed identifier was carried out, the results of which were used in the synthesis of the identifier structure, which expands the range of its operation modes.

THE POWER ENERGY STORAGE SYSTEMS TECHNOLOGY RESEARCH

Yu. Malogulko , V. Lastivka — Thu, 17 Feb 2022 00:00:00 +0300

An analysis of the existing modern technologies of power energy storage systems was carried out for further study of the issues of their placement in distribution systems, as well as their functioning under different operating modes and features of the power system.

METHOD OF AUTOMATED SCHEDULING BY USING GREEDY ALGORITHM

M. Markelov — Thu, 17 Feb 2022 00:00:00 +0300

The paper proposes a method for automated scheduling. This method is based on applying a greedy algorithm to generate the first version of the employee schedule.

ORGANIZATION OF USER ACCESS DIFFERENTIATION TO INFORMATION SYSTEM FUNCTIONALITY

A. Pletnev — Thu, 17 Feb 2022 00:00:00 +0300

This article offers practical guide on how to organize user access differentiation to information system functionality on the basis of the author's improvement of the classical scheme of the Role Model of user access control. Recommendations on the implementation of the proposed system of access differentiation in the information system are given. The peculiarities of the construction of the mechanism of user authentication using web-tokens in the context of the proposed system are briefly touched upon.

TECHNOLOGY FOR OBTAINING SPECIAL LEATHERS WITH IMPROVED PERFORMANCE CHARACTERISTICS, RESISTANT TO OIL AND PETROLEUM PRODUCTS

A. Shestov — Thu, 17 Feb 2022 00:00:00 +0300

A technology is proposed for obtaining leathers for the uppers of special footwear intended for employees of oil-producing enterprises. Leathers for uppers made from cattle skins produced by this technology are distinguished by a combination of high strength, hygienic and protective characteristics, including resistance to oil and oil products, as well as to biodegradation. The technology for obtaining special shoe leathers includes a through complex processing of semi-finished leather products with non-equilibrium low-temperature plasma and a solution of silver nanoparticles .

MIXED PROBLEM FOR THE FORTH ORDER POLYLINEAR PSEUDOHYPERBOLIK EQUATIONS WITH NONSMOOTH COEFFICIENT

G. Shukurova , J. Mamedova — Thu, 17 Feb 2022 00:00:00 +0300

In this work the mixed problem for the forth order polylinear pseudohyperbolic equations is considered, when some coefficients are sufficiently smooth functions and some have bounded variations. The definition of weak solution is introduced. The theorem of existence and uniqueness of weak solution of the mixed problem.