The main process of stratum fluid extraction in Russia is mechanized lifting. It is observed that the stock of wells equipped with electric centrifugal pumps units has grown by 50% over the past 10 years, to almost 100,000 units. Growth detected in the average time between overhauls of the oil-well stock during this period increased by 50%, to almost 800 days. Mathematical modeling becomes a tool for further improving energy efficiency and reliability. The purposes of this work is to analyze existing models of submersible electric motors and their area of operations, identify existing shortcomings and limitations, and formulate requirements for the refined model and its application potential. The results of a thermоvisional inspecting of the rotor of a submersible electric motor after long-term operation in idle mode are presented. The temperature dispersion of the rotor packages is recorded from 36.68 °C to 46.67 °C. Different packages temperatures lead to uneven changes in the active resistances of the windings, which affect the contribution of each package to the integral operating and Electromechanical characteristics of the submersible motor. For taking into account the detected effect, it is proposed to model a submersible asynchronous electric motor as an electrotechnical complex consisting of an interacting and mutually influencing set of elementary electric machines. Spatial and mathematical models are presented that take into account temperature fluctuations in individual parts of the electric motor. The results of verification of the mathematical model are presented. Its validity in the field of applicability is shown.

Keywords: electric submersible motor, ESP, rotor pack, mathematical model, thermal processes

The decentralized electric power supply zone occupies about 60-70% of the territory of the Russian Federation. Electric power supply here is carried out using electric generator sets with diesel drive engines. In combination with the difficult logistics of fuel and lubricants materials delivery, this leads to a high prime cost of electricity energy generated. In the capacity of a measures to the costs of electricity reduction, renewable energy sources are used, while maintaining diesel generation as a guaranteed supplier of electricity. Renewable energy is characterized by significant stochastic fluctuations. Based on experimental data, the article shows that the daily load curves of small settlements contain a significant stochastic component, which greatly exceeds the seasonal, daily, and technological components in amplitude. The purpose of this work is to substantiate the structure and parameters of a hybrid energy storage device (HESD) for the synthesis of electrical power generation complexes using renewable energy sources. Spectral analysis using the window Fourier transform is used as a tool. It is established that the energy approach to the choosing of HESD components requires N types of electric energy storage devices, which differ in the ratio: the permissible frequency of the charge-discharge cycle to the cost of the component. As a criterion for choosing the structure and parameter values of a hybrid energy storage device, an estimate is proposed for the levelized cost of electricity (LCOE).

Keywords: hybrid energy storage, electrotechnical complex, renewable energy, daily load curve, spectral analysis, Fourier series

Using finite differences, a transition is made from a second-order differential equation to a difference equation to describe the dynamics of the integral indicator of product quality. Relationships between the coefficients of the difference equation of quality dynamics and the second-order autoregression equation for the integral quality indicator are determined. On the basis of experimental data on the dynamics of the integral quality indicator, the adequacy of its description by a second-order linear differential equation, as well as the related linear difference equation and the autoregression equation, is substantiated. The analysis of the results of the activities of three Russian enterprises to ensure the quality of the trolleybuses they produce using a generalized analogue of the sensitivity coefficient, the ratio of the average value of the control action to its range and the pulsation coefficient. The relationship between the results of the activities of these enterprises and their further life cycle is considered.

Keywords: quality dynamics, finite difference method, autoregression, integral quality indicator

Methods and results of determining indicators of deformation and strength properties of soils using various laboratory test technologies are considered. The research objective is to verify the methodological correctness of the results obtained from tests in a compression odometer chamber with the ability to measure lateral stresses. The relevance of this development lies in the possibility of replacing this device with testing to determine the strength characteristics of the soil in shear devices. The results of tests of fine sand lying at the base of the projected sports and recreation complex at one of the construction sites in Penza are presented. The influence of the used test methods on the obtained values ​​of the strength and deformability characteristics is shown. Correlation indicators are revealed and corresponding conclusions and proposals are given. There is a possibility that the method is valid when some correlation coefficients are used. Therefore, in the future, it is necessary to conduct tests on different types of soils with the possible compilation of tables of conversion factors.

Keywords: sand, laboratory test methods; single-plane cut, odometric tests, strength characteristics, deformation characteristics

The article presents the results of experiments to study the possibility of using machine vision algorithms for identifying timber, in particular round timber, based on the recognition of the image of annual rings taken as a natural marker. Image recognition is carried out using fingerprint identification algorithms. The results of testing several algorithms for fingerprint identification are presented. The analysis of the effectiveness of the proposed method and its suitability for solving such problems is carried out.

Keywords: annual rings, fingerprints, recognition, identification, image processing, pattern recognition, operational accounting, efficiency

The paper discusses modern approaches to the mass valuation of real estate, automated systems for typical buildings assessment, and also provides the development of a method for the continuous assessment of real estate objects, which makes it possible to effectively evaluate groups of real estate objects and infrastructure. This research is aimed at studying the economic component of this process - modeling of a system for assessing the market valuation of real estate in typal development objects. The purpose of the study is to develop a system of continuous assessment (mass valuation) of real estate, taking into account the current methodological support of the process of assessing the market value of real estate, and should contribute to the improvement of the comparative approach to valuation in the framework of the practical activities of appraisers, as well as for state regulation of the real estate market.

Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

The paper deals with virtual-optic image processing, particularly – with contrast enhancement, specifically – with control of color saturation contrasts in order to detect latent graphic information. The theorem of a hue invariance at color saturation through RGB-coordinates shift and its brightness restoration through RGB-coordinates proportional variation is proved. Meeting the corresponding requirements for analytical software tools, the original algorithm and program to enhance saturation contrasts were developed. The truncated brightness equation is presented. The possibility to optimize the speed versus accuracy of the conversion is laid. The program was successfully approved: a significant increase in the information content of the image was recorded. The efficiency of the created software product application to expert problems is demonstrated.

Keywords: graphic information, color saturation, saturation contrast, contrast control, algorithm and program, latent images, expert applications

The equations of spinodal decay in binary systems in which there is a phase transition-improper decay are obtained. For the first time, spinodal equations for a phase transition with one multicomponent order parameter (two one-component) are obtained.

Keywords: binary solutions, spinodal decay, structural phase transition

For the three main processes of the enterprise, identified in the decomposition of its activities, a mathematical model in the space of conditions is developed, taking into account their relationship and interaction in the quality management system. For the obtained system of differential equations, the structural composition of the operators included in it is disclosed. An example of the application of the created mathematical model in the study of the functioning of the quality management system using linear and non-linear operators and the action of random external disturbances is considered. A discussion of the simulation results at various parameter values from the point of view of the functioning of the selected processes is presented.

Keywords: differential equation, space of conditions, process, quality management system

The paper provides an analysis of the principles of the multichannel protection system. The analysis showed that in order to solve the problem of ensuring secure communication with an external resource through public networks, it is advisable to use a multi-channel system with different channel capacities, while the main channel and spare channels that are connected to work when the main channel cannot handle all incoming applications with probability of 0.95. This model takes into account that the channels are filled hierarchically, and are freed up as the applications are processed.

Keywords: automated system, modeling, protection subsystem, queuing system, probabilistic assessment

The article studies the subject of human settlements with decentralized power supply, included into a locally isolated power supply complex. The basic integrated measures were determined for settlements power lines daily load curves. The results are presented, for dependency assessment between the integrated measures for daily load curves and the number of the settlement’s inhabitants. The dependency has been proven to be effectively described by a second order equation. For the dependency, the correlation coefficient, the determination coefficient and the average approximation error have been given.

Keywords: Power line load curve, decentralized power supply zone, locally isolated power supply complex, approximation

An experimental study of the combustion of mixtures of hydrocarbon fuels in a water heater was carried out. The dependences of the outlet temperature of the heat carrier on the composition of the fuel in two cases were established: a mixture of methane and propane-butane fuel, a mixture of methane and hydrogen.

Keywords: hydrocarbon fuel, variable composition, heater, reclaiming, energy efficient and environmental combustion

The development of the customs service of the Russian Federation until 2030. The aim of the research is to improve the customs risk management system as a result of the development of a methodology for the automated application of the flow of goods between various customs services. As a result, an algorithm for searching and analyzing goods flows was proposed and its software implementation of mediation in MS Access requests for a database of electronic copies of goods declarations was presented.

Keywords: risk management system, flow of goods, customs risks, foreign economic activity, databases

The work describes the implementation of the cognitive set-theoretic approach proposed earlier for modeling complex systems. The article describes in detail the application of the analytic hierarchy process and the cluster approach to determining the cadastral cost of land and selecting the site according to predetermined criteria on the example of Taganrog. Calculations and visualization of results were carried out using the software products STATISTICA and QGIS

Keywords: cognitive theoretical-multiple approach, the analytic hierarchy process, cluster approach, cadastral cost

The simulation of a multilayer structure in the finite element Ansys complex is considered. The design consists of 10 layers, each of which has certain specific properties. The model is an imitation of the soil base pavement. We consider the simulation in the form of a simplified, flat statement of the problem. The analysis of the oscillations under impact. The wave field of displacements at a given part of the structure is analyzed. Based on a numerical experiment, an approach to estimating the characteristics of a layer is constructed.

Keywords: multi-layer construction, vibration diagnostics, simulation, FEM, Ansys, pulse action, dynamics, fluctuations