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  • Reviews, suggestions and discussions

  • Features of the development of offshore oil fields

    "This article discusses the process of salt formation in the development of oil fields. The relationship of the hydrogeological environment with oil deposits, as well as the influence of hydrogeological conditions on them. The influence of the hydrogeological properties of oil fields, which affect the formation of salts directly during the development of an oil field, is considered. The article presents the problems of the formation of salt deposits, the main salts that are most often found by industrial oil workers in the development of oil fields.Oil companies are constantly spending tremendous amounts of money on salt deposits. Modern industrial oil companies use mechanical, chemical methods of salt control and use inhibitors to prevent their formation. Using these methods is effective, but quite costly. In order to prevent the occurrence of salts, a cheaper method is modeling. And also such a method can prepare specialists in advance for a future problem with deposits. From what it can become clear which funds should be involved in the fight against these deposits"

    Keywords: shelf, salt deposition, oil field, nucleation, temperature, pressure, solubility, oil, natural gas, produced water

  • Overview of opinion dynamics of various social communities

    In this paper we consider various dynamics of opinions in social communities. The purpose of this work is to show all the variety of patterns of changes in opinions in teams. An important aspect is the specific application of dynamics. The process depends on the type of social community. This research is very important.The study of patterns of change and formation of opinions in any team is the basis for two main goals. The first important goal is to find consensus in the team.The second important goal is to determine the ratings of all participants.The following dynamics are considered in the paper: De Groot, Friedkin-Jones, Hegselmann-Krause, model of dynamics with centers of influence, Deffuant - .Weisbuch, Zaller-Deffuant .

    Keywords: reputation, social community, game theory, opinion dynamics, influence, opinion, consensus, game-theoretic models, principal, player, agents, principal, player, agents

  • Physical and mathematical sciences. Physics

  • Algorithm to control saturation contrast of digital images and its program realization

    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

  • Physico-chemical aspects of the formation of multicomponent solid solutions in an inhomogeneous thermal field

    The theoretical aspects of crystallization of multicomponent solid solutions are discussed. Antimonoid heterosystems in which bismuth is present are considered, a component that largely determines the photoelectric properties of the studied materials. The features of establishing the equilibrium of the liquid and solid phases in the process of crystallization of these systems are considered. The laws of the thermodynamic behavior of heterosystems in the conditions of gradient liquid-phase epitaxy are established. The results of experimental studies on the growth of solid solutions of multicomponent bismuthides on InSb substrates are presented.

    Keywords: solid solutions, migrating liquid phase, indium antimonide arsenide, gallium bismuthide, binary pair, recrystallization, quasicrystalline structure

  • Analysis of the zonal structure and physicochemical properties of the graphene-manganese heterostructure

    In this work, we simulated the graphene-MnO composite structure based on minimizing the electron density functional. The analysis of the processes of rearrangement of the interface surface SLG (monolayer of graphene) - MnО (111). In this case, the interface was subjected to hydrogenation. The distribution of the effective charge on graphene is investigated. A decrease in the work function of the charge carriers during hydrogenation of the interface is established.

    Keywords: effective charge, graphene, passivated surface, density functional, interface, work function, energy gap, band structure

  • Technical science. Informatics, computer facilities and management

  • Mathematical models and algorithms of intuition, insights and hypnosis of robots

    The article introduces the definition of a robot, its intuition and insights, proposes decision-making algorithms for an emotional robot with non-absolute memory, based on the introduced definitions. It is noted that in order to verify the correctness of the robot making decisions using intuition or insights, a logical or experimental verification of the adequacy of the decisions is necessary. The article introduces the definition of robot hypnosis and the definition of a hypnotist robot, as well as the determination of the suggestibility coefficients of a robot; mathematical models and the algorithm of the hypnotic state of robots based on the mathematical theory of emotional robots are given; ways to ensure the safety of robots for humans and personal devotion of the robot to a particular person are proposed. Both methods are based on the proposed hypnosis models.

    Keywords: robot; emotions mathematical models; Artificial Intelligence; intuition; insight; hypnosis

  • Determination of internal stresses inside a bimetallic rod

    The study of the internal friction of electrolytic coatings is complicated by the impossibility of obtaining sufficiently massive samples and testing them independently of the substrate, and therefore it is necessary to evaluate the stress state of the sample-coating system. The aim of the work was to find a relationship between the internal stresses arising in the coating deposited on a circular cross-section specimen during internal friction tests using a torsion pendulum. During the analysis of the stress-strain state of the bimallic sample, expressions were found to calculate the maximum and minimum stresses in the electrolytic coating. The mutual influence of the coating material and the substrate was evaluated numerically using the Comsol Multiphysics program.

    Keywords: internal friction, internal stresses, torsion pendulum, beam rotation, electrolytic coatings

  • Coordination of private and public interests in the implementation of innovations in the case of multiple agents

    The mathematical model of coordination of private and public interests in the implementation of innovations in the case of multiple agents is studied. It takes into account the presence of two management levels, which are a supervisor and several agents. The relationship between the supervisor and the agents is based on a hierarchy in accordance with the information regulations of Stackelberg games. The incentive method is used as a method of hierarchical management. Algorithms for constructing equilibria for different information regulations are specified. The numerical implementation of the proposed algorithms is based on simulation. The analysis of the obtained results is given.

    Keywords: Stackelberg game, Stackelberg game with feedback, hierarchy, simulation, innovation, motivation, supervisor, agents

  • Model-based design in the engine control algorithm code generation for the STM32 microcontroller

    Using the concept of the model-based design, this article considers the stages of generating the C-code of the engine control algorithm using the Embedded Coder and STM32 Embedded Target tools for Matlab/Simulink. For the example of the chosen stm32 microcontroller, its peripherals will be initialized and connected to the graphical model of the algorithm. In addition, a description of all the blocks and their functions of the resulting model is provided. At the last stage, the C code is generated, ready for loading it into the microcontroller and further controlling the motor as part of the electric drive.

    Keywords: Model-based design, Matlab/Simulink, STM32, the control algorithm, STM32 Embedded Target, Embedded Coder

  • Mathematical model of an automated system for composing complex dispersed compositions

    The article deals with the issue of automation of technological production of dispersed materials. The mathematical model of dry charge dosing is described. A fast Fourier transform (FFT) method is proposed for the analysis of acoustic emission signals. The conclusion is made about the economic aspect of production and the accuracy of dosing fractions.

    Keywords: automation of production, technology, dispersion composition, the method of fast Fourier transform

  • Problems of introduction of BIM technologies on the example of enterprises of the city of Tyumen and the Tyumen region

    High-tech software has firmly entered the work of the design and construction complex of Russia, which allows you to create a single digital information model of the object. Awareness of the importance of using BIM - technologies to overcome the problems of their implementation is a paramount task today. The presented analysis of the situation at micro-enterprises, small, medium and large enterprises of the design and construction industry of the city of Tyumen and the Tyumen region allows us to pay attention to the pressing problems of implementing BIM-technologies today. BIM - technologies are innovative in the construction business, and we are very enthusiastic about them, considering that they are the future of the design and construction industry.

    Keywords: awareness of the importavce of using BIM - technologies, a single digital information model of the object, the life cycle of an object, software products, software subscription, process management

  • Solving the planning routes problem with time constraints

    Many organizations in the process turn to services related to the delivery of different categories of cargo. Transport logistics is responsible for the process of moving the required amount of cargo to a given point using the optimal route. At the same time, there is often an additional restriction - the delivery of cargo to a given point should be carried out strictly during a certain time interval. The presence of time restrictions lead to the fact that the routes formed without their consideration are not permissible. This article considers developing a solution of the planning and optimizing routes problem with time constraints.

    Keywords: route, route planning, route optimization, time constraints, vehicle route problem

  • Environmental assessment of the building life cycle based on BIM

    The article proposes a model of a qualitative environmental assessment of the building's life cycle in the form of a three-dimensional matrix depending on the construction phase, resources used and criteria for sustainable construction. The concept of deconstruction, which includes the basic principles of sustainable construction, is considered. It is concluded that with the help of information modeling, it is possible to design alternative options for buildings with expired life and to carry out more effective management of the building life cycle based on the proposed model of qualitative environmental assessment.

    Keywords: Building Information Modelling (BIM), principles of sustainable construction, environmental life cycle assessment, deconstruction

  • Modeling a frequency converter for a synchronous permanent magnet motor with a sudden change in the load on the drive shaft

    In this paper, we consider the simulation of a 5.1 kW synchronous electric motor with a two-link frequency converter with a control system that monitors the speed on the shaft in the PSIM simulation environment. IGBT M2TKI-50-12 manufactured by Elektrovypryamitel Saransk were selected for the load current. In this case, the load on the shaft abruptly changed from 1.25 to 2 of the nominal value. Presented are graphs of current, output power, motor speed and torque on the shaft.

    Keywords: permanent magnet synchronous motor, PSIM, two-link frequency inverter, spasmodic load variation

  • Settlement automation in the information system for managing investment projects of energy grid companies

    The article is devoted to the process of managing the investment activities of energy grid companies. The life cycle of the investment program of the energy grid company is described. The principle of accounting for investment programs in the company is described, on the basis of which an algorithm for working in an automated system is developed. Also, formalization of the calculation of technical parameters affecting the calculation of economic performance indicators was carried out. A system of indicators of investment attractiveness for electric grid companies has been developed. An example of the implementation of the mechanism for automatic calculation of parameters and construction of diagrams in the system is given.

    Keywords: automation, energy network company, investment project, management system, electricity, key performance indicator, automated system, energy network company, capital investments, reporting

  • Automation of calculation of indexes construction works by using "TotalExpert: Analytics"

    The article is devoted to resolving issues that arise when planning capital investments in the "Gazpromneft" PJSC Exploration and Production Block. The basic concepts of indices in cost engineering are disclosed. The article presents the prerequisites for the development of construction and installation indexes for the oil and gas industry. An example of calculating indices is presented, as well as factors that affect these calculations. A review of the automated index calculation process is made. The advantages of automation of this process are revealed. The advantages of calculating indices using the resource-technological model are determined. It also examines the use of construction and installation indices for the oil and gas industry based on the TotalExpert: Analytics program at the "Gazpromneft" subsidiary. There is a detailed analysis of this software and a description of working with it.

    Keywords: indices, installation and construction works, automation, resource-technological model

  • Method for short-team forecasting of financial time series with small sample sizes

    The article presents the results of experiments to study the possibilities of short-term forecasting of financial time series using various types of forecasting algorithms. There are results of testing of ARIMA method and Long short-term memory algorithm on a data set wich describes the value of the US dollar relative to the Russian ruble for one day, to predict the future value of the indicator under study. The estimation of the accuracy of forecasting of each of the methods and their suitability for solving such problems is made.

    Keywords: forecasting, time series, neural networks, finance, regression algorithms, data analysis, reccurent neural networks, python, numpy, pandas, keras

  • Analysis of neuromuscular junction fluorescence images using computer vision methods

    In chemical synapses an action potential depolarizes presynaptic membrane and opens voltage-gated calcium channels after which calcium influxes to the cell. Studying of calcium influx in nerve ending is an important step in understanding of signal transmission in neuromuscular junction. Our laboratory uses a method for recording of calcium transient in a photometric setup, which involves recording series of images in order to obtain a signal. The image processing technique currently in use involves making decisions based on our experience in identifying the area of ​​registration of a useful signal. The idea of this work is ​​creating of algorithm for analyzing experimental data which allows minimal participation of the experimenter. The idea based on the use of computer vision methods (OpenCV), provides the correct detection of nerve endings on experimental fluorescence images. The image processing algorithm includes the following steps: noise reduction; morphological transformations erosion and dilatation; a composite set of masks for different time points and their subsequent combination into one mask using image binarization by Otsu. The result of this work is an algorithm used to process experimental images, providing a strictly defined reproducible procedure, devoided of inaccuracy, introduced into experimental image processing.

    Keywords: synapse, neuromuscular junction, computer vision, calcium, photometric setup, fluorescent dye

  • Distributed control of a group of stepper motors based on multi-channel transceivers

    The article considers the solution of the problem of distributed control of a group of stepper motors based on multi-channel transceivers. The analysis of literature sources devoted to the development of wireless stepper motor control systems is carried out. The expediency and possibility of distributed control of stepper motors of manipulator links using multi-channel transceivers are considered. It is assumed that there is a need for two-way information exchange between the stepper motor module and the Central control system. The design ratio for the duration of the cycle of the full package of control information with the values of the duration of pauses, switching reception and transmission, the duration of the preamble and the duration of transmission of the address, useful information and checksums of the package. The possibility of increasing the maximum frequency of control pulses transmitted over the information channel when transmitting a sequence of control packets instead of single packets is proved. The structure of the package for controlling the electronic stepper motor driver is defined, including a pointer to the direction of rotation, the duration of pulses and the degree of fractional step. An example of calculation, based on the obtained ratios, of the maximum speed of rotation of the stepper motor shaft for specific models of the engine and the transceiver in the case of a six-channel control system is given. Keywords: distributed control, stepper motor group, control package, frequency of control pulses.

    Keywords: distributed control, stepper motor group, control package, frequency of control pulses

  • Evaluation of the effect of combining time series forecasting models

    This article investigates methods to combine multiple data-driven models for forecasting time series. This is done in order to increase the accuracy of forecasts according to the historical error signal, such that it minimises downstream costs of forecast errors.

    Keywords: time series, combination of models, accuracy assessment, forecasting, forecast accuracy

  • Methods and features of interaction between clients of the information system and the control center in order to monitor the infrastructure of the enterprise

    This paper describes the methods of interaction between clients of the information system and the control center. A protocol is defined for this interaction, and its advantages and disadvantages are described. Calculations of the transmission time of a complete package of information were performed as part of the task of monitoring workstations in an organization, and conclusions were also drawn based on the results of calculations.

    Keywords: Active Directory, client, server, monitoring, TCP, protocol, RTT

  • Development and strength analysis of the new design of the friction wedge of the vibration damping unit of the freight carriage

    Currently, in the design and manufacture of steel products operating in conditions of heavy impact-abrasive wear, not only material is given, but also the structure of the product itself. One such detail is the friction wedge of a freight wagon trolley. In the presented work, a new design of the friction wedge of the vibration damping unit is presented; technical calculations are carried out on the strength of the presented design. The safety factors of spring suspension are calculated. All calculations were performed according to the standards for the calculation and design of new and modernized railroad cars of the Ministry of Railways 1520 mm gauge. The performed calculations indicate the high performance of the developed design, the obtained values ​​fully satisfy the requirements for such products. The result of the work on creating a new design of the friction wedge of the vibration damping unit is to obtain a patent for utility model No. 194823, a drawing has also been developed (KI- and terms of reference for experimental design work (KI- TK).

    Keywords: friction wedge, vibration damping unit, freight car truck, strength, reliability, durability, calculation of spring suspension, static deflection of spring suspension, coefficient of structural margin of deflection, coefficient of relative friction