Informatics, Computer Engineering and Control
BELOVODSKIY V.N., BUKIN S.L. ANALYTICAL ANALYSIS OF THE DYNAMICS SINGLE-MASS INERTIAL VIBRATION MACHINE WITH A SHAFT FRACTURE IN THE DRIVE TRANSMISSION.
UDC 531.3, 534.014 Annotation:A single-mass vibrating machine with asynchronous gimbal transmission in the drive of a centrifugal oscillator
is considered and an attempt has been made to obtain analytically an approximate solution describing the vertical motion
of its working organ. A feature of the mathematical model is that its motion is described by the second order linear differential
equation in which the disturbing force is formed by the rotation of the unbalances with a variable angular velocity. Considering
this fact, initially the expansion of the angular velocity into a truncated Fourier series was obtained then the stationary
solution of the equation is found by superposition of partial solutions. Expressions describing the disturbing force
of the unbalances and the movement of the working organ in the finite form are derived. The results obtained allow preliminary
calculations of amplitude and phase frequency characteristics for different values of the shaft fracture angle and to evaluate
the level of higher harmonics generated by such a drive in the spectrum of displacements and accelerations of the working organ. Keywords: SINGLE-MASS VIBRATION MACHINE, CENTRIFUGAL DRIVE, TRANSMISSION, ASYNCHRONOUS CARDAN TRANSMISSION, WORKING BODY, DYNAMICS.
YERMOLENKO T.V., POPADIN D.V., KOTENKO V.N.. APPLICATION OF MACHINE LEARNING IN STOCK MARKET FORECASTING.
UDC 681.518.25 Annotation:The article describes the features of time series of financial data, the main difficulties in their forecasting and methods for processing and structuring them to obtain a forecast. The main problem is the problem of stationarity and the availability of memory: transformations leading to stationarity of the series remove long-term memory. To solve it, fractional differentiation is used. Three classes of price trends can be distinguished: ascending, descending and sideways. Given the high market volatility, the transformed data is labeled for these three classes using dynamic yield thresholds. When making a decision on a rate, the authors propose to use two machine learning models: one for marking the price movement using the three-barrier method,
the second calculates the confidence coefficient for the marked markers using the Lopez De Prado two-stage method. Keywords: FINANCIAL TIME SERIES, BARS, JAPANESE CANDLESTICKS, TICK CHART, FRACTIONAL DIFFERENTIATION, TRIPLE BARRIER METHOD,
LOPEZ DE PRADO TWO-STAGE LABELING.
ZAKAMARKINA E.A., GUBENKO N.E..
THE USE OF GAMIFIED TECHNIQUES IN THE DEVELOPMENT OF HYPERMEDIA SYSTEMS FOR LANGUAGE LEARNING.
Annotation:The article discusses the application of gamification in the process of learning a foreign language. The use of gamification in the educational process,
including in the conditions of electronic and distance learning, is one of the actively developing areas of modern education. Keywords: GAMIFICATION, GAME LEARNING, MOTIVATION, HYPERMEDIA SYSTEMS, FOREIGN LANGUAGES.
LAZARENKO E.N., DOROKHINA G.V., GARKUSHA D.A.. ANALYSIS ON VERSION CONTROL SYSTEMS.
UDC 004.75: 004.056 Annotation:The article presents a comparative analysis of third-generation version control systems. The analysis of modern publications was carried out and the experience of the team of authors was summarized. As a result, the criteria for analysis of version control systems and the function of integral evaluation of version control systems were formulated. Evaluation of version control systems according
to the proposed criteria and the integral evaluation function indicated the preference for using the version control system Gitea. Keywords: VERSION CONTROL SYSTEMS, COMPARATIVE ANALYSIS, GITLAB, BITBUCKET, GOGS, GITBUCKET, ONEDEV, GITEA.
NICENKO A.V., SHELEPOV V.JU., BOLSHAKOVA S.A. ОN THE "PREDICATIVE-PREPOSITIONAL GROUP" DISAMBIGUATION FOR SOME RUSSIAN WORD COMBINATIONS.
UDC 004.89:004.93 Annotation:The article deals with the problem of automatic disambiguation for a number of collocations. In some cases they can
play the role of predicative collocations, and in others they can act as prepositional groups. Disambiguation algorithm takes into account the presence of certain words or syntax elements in a segment of the text. Keywords: NATURAL LANGUAGE PROCESSING, AUTOMATIC TEXT ANALYSIS, DISAMBIGUATION, COLLOCATIONS, PREPOSITIONAL GROUP, NATIONAL LANGUAGE CORPUS.
ROBOTIC DEVICE CONTROL FOR VIDEO INSPECTION OF PIPELINES OF CITY WATER SUPPLY NETWORKS.
Annotation:The implementation of a robotic device for video inspection of pipelines of urban water supply networks is presented.
The structural diagram of the electrical equipment of individual modules and the main software components of the system are considered. Keywords: STEPPER MOTOR, DC MOTOR DRIVER, INCREMENTAL ENCODER, PRESSURE SENSOR.
BEZUS YU.A., RUMYANTSEV V.V., FEDOROV S.A. NUMERICAL MODELING OF THE ACOUSTIC ACTIVITY OF NON-IDEAL 1D CRYSTALLINE SUPERLATTICE.
UDC 519.21, 51-7, 311, 303.732 Annotation:The paper studies propagation of acoustic excitations through a non-ideal (defect containing) one-dimensional superlattice. The virtual crystal approximation is employed to perform a numerical modeling
of the dependence
of specific rotation angle of elastic wave polarization plane on structural defect concentrations in a two-sublattice one-dimensional phononic crystal disordered in its composition and constituent layer widths. Keywords: ACOUSTIC EXCITATIONS, NON-IDEAL ONE-DIMENSIONAL PHONONIC CRYSTAL, ACOUSTICALLY ACTIVE MEDIUM, VIRTUAL CRYSTAL APPROXIMATION.