Background: The quality of electricity is one of the main problems necessary for the normal functioning of responsible technological processes in which a slight distortion of the supply voltage can lead to a violation of the normal operation of enterprises. There are several solutions to this problem: uninterruptible power systems, fast automatic power reserve technology (FAPR), dynamic voltage distortion compensator (DVDC). The most interesting solution is the application of dynamic voltage distortion. Material and methods: The principles of constructing a dynamic voltage distortion compensator with multilevel voltage inverters are investigated. An imitation model constructed under the following assumptions is proposed: an ideal case of the main circuit system (without higher harmonics) is considered, the nonlinearity of the transformer is not taken into account, short-circuit currents are absent, only constant load power is used. Assumptions are justified by the fact that in practice their error is no more than 3-5%, which is permissible. The results are obtained by modeling the system in the MatLab 2016b package. Results: A fundamentally new structural and functional scheme of a dynamic voltage distortion compensator with a multilevel system is developed. The requirements for the dynamic compensator of voltage distortion, load, LC-filters, current-voltage transformers and a converter are determined. Simulation of the simulation model has shown that the system works and corresponds to the expected results. Conclusions: The proposed voltage compensation system will solve the problem of the normal functioning of technological processes. The simulation results showed that the declared functional of the DVDC provides compensation of the voltage level in a given range of voltage dips. The obtained results can be used to stabilize the power supply: in the power supply systems of medical institutions, electric transport, critical energy facilities of a high category.

Keywords: Dynamic voltage distortion compensator (DVDC), automatic control system, operation modes of DVDC, model of the DVDC system, multilevel voltage inverter, simulation model, voltage distortion, volt-additional transformer, electric power, voltage failure

The research that results from the work presented is the means of transforming space imagery. A transformation method based on the use of projective geometry methods is proposed. A completed study of the proposed method for mathematical image and terrain models showed a high degree of accuracy and a number of advantages over traditional image transformations

Keywords: Photogrammetry, transformations, cosmic images, projective geometry

The problem of formalizing the elastic line of a thin steel strip of great flexibility arose in the process of creating elastic elements with a nonlinear characteristic for use in various kinds of damping devices. Such elastic rods experience large displacements when the material operates within the elastic range, in particular when axial loading in the supercritical region, when the axial load exceeds the Euler force, but in the subcritical region the movements are not significant enough to obtain a regressive-progressive characteristic.The paper investigates the possibilities of softening the elastic characteristics under axial loading in the initial period by applying a rigid cantilever arm mounted on the end of the elastic rod with a vertical load applied to it. Simultaneously, the influence of the vertical force on the elastic characteristic of the circular trajectory is investigated. To formalize the stress-strain state of a thin steel plate of great flexibility, the method of elliptic parameters is applied. The resulting elastic characteristic actually has a regressive-progressive character. The results obtained using the ANSYS computation complex for a system with given geometric parameters correlate quite well with the theoretical dependences derived. It follows from the diagram that the eccentric compression of the elastic element forms a regressive part of the elastic characteristic, and the circular trajectory of the point of application of the vertical force forms a progressive section.

Keywords: elastic line, thin strip, greater flexibility, formalization, off-axis loading, elliptical parameters, regressive-progressive characteristic

The work is devoted to research of influence of laser visual stimuli on the functional activity of man. The analysis of changes in the tempo of psychomotor activities in promoting human dynamic images of laser graphics. Stress is a state of severe and prolonged psychological stress, which occurs in a person when his nervous system gets emotional overload. Stress is an integral and constant companion of our life because the phenomenon of stress is inherent in every organism. The main objective is the minimization reasons, namely the negative impact of stress on the psychophysiology of the person, and therefore his health and functional activity, and the consequence - the effectiveness of his work, and therefore factors as personal performance of the employee and of the organization as a whole. Alternative to conventional drug and non-drug methods of preventing and dealing with stress, is audio-visual stimulation, which is based on the fact that music and color can have a strong influence on the brain.

Keywords: psychophysiology of visual perception, light therapy, sound therapy, non-drug therapies, stress, health, medicine, optics, lasers, colors, lighting design, sound design

It is studied problems of building of buildings with a difficult step skeleton. Prospects and economic efficiency of building of buildings of this kind are considered. One of perspective projects of this kind is in detail described. Building merits and demerits come to light.

Keywords: organization of construction; high-rise housing; reinforced concrete and steel structures

A manganese-vanadium concentrate precipitate containing V2O5 and MnO2 is formed on the stage of wastewater ozone treatment in sodium technology of vanadium-containing converter metallurgical slag processing. Vanadium content of the slag changes between 4 and 15 % wt and manganese content changes between 62 and 75,5 % wt. The article examines influence of concentrate with 14,33 % wt V2O5 and 65,44 MnO2 % addition in slag-with-soda furnace feed to determine positive effect on the result of roasting. Vanadium content of the slag is 22,34 % wt expressed as V2O5. Roasting temperature is 850 °C, Na2O/V2O5 molar ratio is 0,5:1, the concentrate is added as 0,25; 0,5; 1,0 mass ratio on the content of soda in starting furnace feed. Degree of vanadium conversion in water- and acid-soluble compounds is increased. The most effect is provided on the process of interaction between vanadium oxides and spinels with sodium compounds with formation of water-soluble vanadium forms. The optimal addition of concentrate is 0,25-0,5 mass ratio on the content of soda. Increasing of concentrate content is not effective. Both manganese and vanadium contained in concentrate give positive effect. Concentrate addition can be recommended for existing industry regardless of type of alkali addition on the stage of roasting.

Keywords: vanadium-containing slag, oxidating roasting with sodium, manganese-vanadium concentrate, increasing of vanadium yield, soluble compounds of vanadium and manganese

Prospects of a universalisation of civil-engineering designs of modern housing estates are studied. Possibility of erection of the multipurpose universal housing estates having a full infrastructure is considered. Questions of ergonomics, an aesthetics, economy and housing and communal services of ready object are studied

Keywords: organization of construction; high-rise housing; reinforced concrete and steel structures

The article discusses the methodology of assessing the technical condition of the regenerative air heater RVP-54 on power boilers Naberezhnye Chelny CHP on the basis of the results of the monitoring of the thermal efficiency. In article the algorithm of monitoring and evaluation of the thermal efficiency of regenerative air heater, allows in real time to compare actual performance with previous values and to eliminate the revealed violations.

Keywords: Naberezhnye Chelny CHP, energy boiler, regenerative air heater RVP-54, technical condition assessment, commissioning and configuration, thermal calculation, temperature difference, heating surface, thermal efficiency, heat losses

The problem of erection of a combined frame in high-rise housing construction is studied. The issues of installation of structures, space-planning scheme of high-rise buildings. Organizational and economic ways of perfection of technology of high-rise housing construction are offered.

Keywords: organization of construction; high-rise housing; reinforced concrete and steel structures

The article describes the problems of mathematical modeling of large systems. Scientific novelty of the work consists in the implementation of a new numerical method for solving systems of linear algebraic equations. This method is based on a targeted random search and stochastic calculations whith using of cloud technologies.

Keywords: system of linear algebraic equations, cloud computing, self-organization, metric

In the article the problems of formation of labor potential as a factor determining competitive advanage in today s economy/ The authors listed serveral factors that affect the structure, composithion of the workforce and the basic elements of development of labor potential.

Keywords: knowledge economy, human capital, competence, intellectual potential, labour potential

The efficiency of algorithms of the adaptive temporal sampling (ATS) is defined by compressibility of an analog signal. For the purpose of prior assessment of compressibility of measuring signals the dependence of the current clock period of measurement in case of ATS from dynamic properties of a signal is considered. Depending on a priori known characteristics of dynamic properties of signals and the given error of approximation select a method of interpolation or extrapolation. In article the dependence of the current clock period of measurement on differential properties of a signal for an ideal algorithm of ATS of interpolation type is received. Restoration of a signal after ATS an interpolation polynomial of Lagrange n-oh of a level is supposed. The quality of approximation is set by criterion of uniform approximation. It is shown that the analysis of ideal ATS of interpolation type comes down to the analysis of the equivalent on value of a section of approximation of ideal ATS of extrapolation type.

Keywords: Adaptive temporary sampling, measurement step, structural properties of a signal, interpolation, reproduction error

Article considers the fundamentals of the organization of construction works in cramped conditions of the current town-planning situation, the impact of construction works on the environment, and a brief description of the negative impact factors is provided. The expediency of a systematic approach to improving the quality of construction is shown, including taking into account the assessment of the state of the environment and the need to reduce the negative impact of construction and installation works on nearby built-up areas. The necessity of taking into account measures to reduce the levels of negative impact on the environment during the project development of the production of works is substantiated, and a number of recommendations are given on the organization of construction works.

Keywords: construction, cramped urban conditions, organizational and technological design, technological processes, environment, organization of construction, construction technologies, construction and installation works, means of mechanization, environmental safe

The article presents the results and outlines the prospects of scientific research of technological processes in cramped urban conditions. The expediency of a systematic approach to improving the quality of construction is shown, including taking into account the assessment of the state of the environment and the need to reduce the negative impact of construction works on nearby built-up areas. The necessity of taking into account the above factors in the development of the project for the production of works is substantiated.

Keywords: construction, cramped urban conditions, organizational and technological design, technological processes, environment, organization of construction, construction technologies, construction and installation works, means of mechanization, environmental safe

in article the algorithm of a posteriori calculation of heart rate on record EX. The algorithm produces the allocation of QRS complex for R-teeth, the classification of complexes into two types: normal and artifact complexes. It is proposed to classify the analysis of contours and measurement of interference at the frequency of 50 Hz. This classification can significantly improve the measurement accuracy of the instantaneous heart rate compared to the moving average

Keywords: frequency of cardiac abbreviations, RR interval, QRS complex, Holter monitoring, selection of artifacts of the FORMER, the algorithm for calculating heart rate, contour, RR–interferometry