The most popular methods of reliability control are considered. In this work, attention is paid to an analytical review of methods for assessing the reliability of measured parameters, their advantages and disadvantages. In the process of analyzing statistical information, the types of inaccuracies that arise and the reasons for their appearance have been established. Methods of dealing with unreliability are given using: the method of level processing, a method for assessing the rate of change of a signal, digital filtering. The solution of the problem of detecting implicit unreliability using the support vector machine is shown.

Keywords: measurement uncertainty, implicit uncertainty, time series, sensor, APCS, level processing, Kalman filter, support vector machine

In this paper, we consider a modification of the algorithm and software implementation of the prototype of a discrete-rotary slicer for preparing 3D printing on multi-axis printers, which allows you to prepare printing for a larger number of types of product models compared to the original algorithm and software prototype. An approach is proposed that provides for the choice of one of several secant planes at certain steps of constructing a layer-by-layer model. The software prototype was refactored. The results of the prototype work are presented, showing the efficiency of the proposed approach. Original protoptype is more constrained with the model types it can process compared to proposed one. Though further investigation of the proposed approach have to be done as well as introduction of parallel implementation of different sectant planes processing.

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

The problem of digitalization of the data accounting system and the problem of managing the technical condition of equipment at thermal power plants are considered. The performance of the entire thermal power plant depends on the operation of the boiler units. If the equipment fails and the necessary measures to resolve the emergency are not taken in time, then the probability of a decrease in the plant's performance up to the suspension of work increases. Thus, the issue of monitoring the technical condition of all operating equipment is relevant. The developed software for automation of the data recording system and visualization of technical parameters of the reliability of boiler and turbine equipment is described. The software has a methodology for determining the technical condition index of equipment. The software was developed using the JavaScript programming language, the React.js library. Digital technologies have been introduced into the process of recording data on the technical condition of equipment, where for the first time the software includes a method for automatic calculation of the technical condition index of boiler units. The software ensures that equipment downtime is reduced, as well as the likelihood of failure or critical breakdown of boilers. Thus, the operation of the software makes it possible to reduce the likelihood of an emergency state of the main equipment of power plants.

Keywords: thermal power plant, boiler and turbine equipment, software, technical condition, reliability, repairn

The article discusses the features of the proposed methodology for developing practical tasks for automated control of knowledge and skills in training IT specialists. The methodology is presented using the example of tasks for controlling knowledge and initial skills in the field of software testing and describing the functional requirements for software. The application of the methodology contributes to the development of e-learning tools and distance learning technologies in training IT specialists (in particular, university students in relevant areas). The research is supported by a stipend of the President of the Russian Federation to young scientists and post-graduate students (No. SP-100.2018.5), which was assigned by the grants Council of the President of the Russian Federation.

Keywords: IT specialist, professional knowledge and skills, knowledge and skills control, automated training systems, software testing

Market relationships between energy producers and consumers leads to increased obligations for all market players. The problem of efficient distribution of electricity purchased on a wholesale market becomes relevant in the context of development of competition in the retail market. The prognostics of energy consumptions becomes a valuable criterion for planning the further consumers’ demands, reducing generation and transportation costs. In case of inaccurate forecasts, the company will be forced to buy or sell electrical energy at unfavorable price. The usage of multi-factor mathematical models in the prognostics makes it possible to make a highly accurate power consumption forecasting. The author proposes an interpretation of the complex energy consumption system as a multiple linear regression equation that takes the relationship between factors into consideration and allows to single out the influence of any factor on the power output.

Keywords: power consumption, train traction, power consumption forecasting, multiple regression, correlation coefficient, pair correlation, mathematical model, residual analysis, determination coefficient, Fisher's test

The pressure device of a paper machine (BDM) is a rather complex object of regulation with many internal and external connections, requiring modern, intelligent algorithms and control systems. The introduction of such automated process control systems is constrained by high requirements for the qualification of service personnel. Thus, the goal is to obtain adequate models of the pressure device on the basis of a production experiment and simulation, to reduce and validate them, which will allow using traditional regulators and control methods.

Keywords: paper making machine, pressure device, paper mass intake, air cushion pressure, simulation, PID controller

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

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

Educational Internet portals are the important means of distance learning. The advantages of searching for educational resources using educational portals in comparison with universal search engines are shown. The main stages of the formation of educational Internet portals are described, methods are considered and the advantages of using attribute search in combination with contextual ones are shown. The importance of the correct formation of the system of classifiers of metadata and keywords, as well as their assignment to educational resources presented on the portal, for the effectiveness of attribute search is pointed out. The stages of the formation of the composition of educational portals, as well as methods of their promotion on the Internet are considered. A comparative analysis of the options for placing the educational resources themselves on portals or links to these resources posted on the websites of universities and other organizations is given.

Keywords: Internet portals, educational resources, Internet search, the formation of portals, the composition of portals, resource attributes

This article describes the experience of implementing a system for monitoring the stability of a network infrastructure using the Telegram messenger in a government institution. The functionality of the system and further plans for its development are presented. The tendency towards the spread of the Telegram messenger in the society is described.

Keywords: Telegram, ping, monitoring, inventory, infrastructure, network

Against the background of the explosive development of modern technologies and methods of construction, the use of innovative structural materials, the growing volume of information about construction production, the complexity and uniqueness of projects, and given the low tendency for retraining of personnel and the insufficient competence of the labor force involved in the production of work, the issue of the quality of construction assembly work (CMP). The applied methods of organizing construction control according to the existing and slightly modified methods of the 80-90s of the XX century do not provide the necessary level of control of construction and installation work. Given the relevance of this problem, the question arises of the need to ensure high-quality and effective construction control to exclude the facts of violation of the production technology, prevent a decrease in the operational characteristics of the building, minimize the cost of eliminating errors, etc. Using comparative, statistical methods of research, analysis and modeling of mechanisms used by engineers of construction control of Russian and foreign construction organizations, the need for implementation was justified and a method of construction control based on modern achievements in engineering and technology was proposed, in particular, the use of building information modeling (BIM) and virtual reality (Virtual Reality, VR) technologies in the relationship, which allows to increase the efficiency of construction production and control, optimize the time for analysis and management decision-making, reduce the likelihood of violations on construction sites that affect the implementation period, cost and quality of the project.

Keywords: construction control, building information modeling (BIM) technologies, virtual reality (VR), construction project life cycle, 3D-model

The report examines the method of processing of oily waste in the power of the microwave radiation. The characteristics of the laboratory complex, its structural scheme and design features. The report includes explanatory drawings illustrating the structure and the temperature sensor based on a fiber-optic Bragg grating.

Keywords: microwave technology; processing; oil sludge; oily waste

This article analyzes the development of competition in the transport services market. The development of a competitive transport services market requires creating conditions for exceeding the level of supply of high-quality transport services over demand, as well as ensuring publicity and information openness of the market in terms of prices and quality of services. This will allow consumers to freely choose transport services, make the "price-quality" mechanism work, and make price and quality the subject of competition. Transport communications unite all territorial entities in the region, which is a necessary condition for the unity of its economic space.

Keywords: the transport services market, competition, the safety of passengers

Text summarization is the process of creating concise summary of a text document which maintains important meaningful information and general meaning of source text. In this paper we overview automatic text summarization task and text preprocessing methods, then we describe the main approaches to automatic text summarization and finally six methods are compared by their performances and execution times. Results of comparison are presented along with example of text summarization. This overview can help those looking to get a basic understanding of the text summarization task and NLP field.

Keywords: text summarization, machine learning, natural language processing

This article considers the option of using a simulation model in organizational conflict management as an intelligent analyzer of a conflict situation. It is proposed to build its own style of leadership, necessary and sufficient to successfully overcome the organizational conflict. Based on the model forecast, the manager constructs an appropriate solution within the framework of the variability of authoritarian, democratic and liberal styles of government with the help of the auxiliary variables available to him. This allows him not only to get out of the usual style of leadership, but also to choose the necessary and sufficient style in this case, to test style behavior strategies. The manager has the opportunity to use the management style that best suits the internal and external conditions of his activities. Today, managers must meet the emerging problems and the ability to solve them effectively with their stylistic variability.

Keywords: simulation model, conflict in the organization, management style, behavior strategy, manager

When determining the locations of compensating devices, it is necessary to make complex calculations that take into account various factors (included in the equations in the form of variables). To get results, calculations are performed repeatedly. Newton's method with coefficients in the form of a Jacobi matrix is widely used. An algorithm for solving the necessary equations by the Gauss method is considered, and the required number of iterations is determined to obtain reliable results.

Keywords: compensating devices, electric power, network state, nodal conductivity matrix, Gauss method, algorithm, Newton's method, electrical nodes, iterations, convergence, algorithm

The article presents scientific and technological aspects of improving grain cargo transportation in the southern region with the participation of railway transport. Based on the analysis of volume indicators of transportation, existing delivery technologies, scientific provisions in the studied area, the directions of development of grain cargo transportation logistics are identified. The prospects of increasing the supply of grain cargo to the ports of the Azov-black sea basin are considered. The review of logistics technologies of grain cargo delivery to the ports of the Azov-black sea basin by rail is performed. New information tools have been developed to support decision - making when optimizing cargo flows and developing grain delivery plans under multi-Agency conditions. A system of temporary criteria for evaluating cargo flow distribution plans at the port road polygon has been formed .The article presents statistics on purchasing innovative rolling stock for the specified volumes of grain cargo transportation.

Keywords: railway transport, export, logistics, management, technology, transportation organization, outsourcing, utilitarianism, egalitarianism, distribution of cargo flows, optimization, information technology, mathematical modeling

An auxiliary subsystem of a multi-agent robotic sowing system for agricultural crops, including autonomous robots functioning as part of a group, is considered as an object of research. The aim of the study is to improve the management of adaptability and productivity of agricultural plants. The tasks of the study included the development of the simplest autonomous robot for introducing working fluids into the cenosis and the choice of its parameters. The experimental data were processed by the methods of mathematical statistics. The developed autonomous robot is made of polymer gel and has the properties of a quasi-liquid body. Its parameters are determined, presented experimentally certain mathematical dependences of the interaction of autonomous robots with working fluids, for example, rainwater.

Keywords: seeding, watering, robotic subsystem, autonomous robot, polymer hydrogel, quasi-liquid body

The article discusses various options for determining the method of stimulating the oil reservoir using artificial neural networks. A topology of a cascade of neural networks is proposed to determine the type and method of the method of exposure. The possibility of using for this problem a hybrid neural network consisting of a Kohonen network, a Grossberg star layer and a multilayer perceptron is also considered.

Keywords: neural networks, oil recovery factor, displacement methods, Grossberg stars, Kohonen network, hybrid neural network

The article provides a brief analysis of the starting processes of electrical devices. The mathematical formulation of the problem of synthesis of starting rheostats is formulated and its solution is proposed. The main condition for optimal starting of electric motors using thermistor rheostats is presented. Optimal diagrams of the starting current and set of revolutions are given. and also, the change in heat losses in the anchor chain. Recommendations on the layout of starting rheostats are given.

Keywords: thermistor rheostat, optimal start-up, thermal start-up characteristic, optimal control problem, DC motor, boundary conditions, speed

This article illustrates specifically how to use least squares method (LSM) and sensitivity function to cope with parametric identification problems. The object of this task is BLDC motor. The example of BLDC can justify the application of LSM and sensitivity function method for estimating nonlinear dynamic objects’ parameters, and the application for motor controlling system in particular. The model in the article is conducted by Matlab. The output is a proof to convey that the method used in solving the problem is accurate, and proves the possibility of its application in scientific and engineering field.

Keywords: parametric identification, least squares method, sensitivity function, BLDC motor, electric drive

The article describes a device for simulating a control object for automated temperature control systems, a mathematical model of the heating and cooling processes of an isolated room, modeling temperature effects on the control object, and a method for implementing a control object simulation on a microcontroller. The device will allow debugging and testing of automated temperature control systems under laboratory conditions, which will improve the quality of temperature control systems being developed.

Keywords: temperature control, automation of temperature control process, mathematical modeling

The article describes the implementation methodology, structure and functional diagram of a surface defect detection system based on the method of electrical impedance tomography in materials of engineering structures that are subjected to significant loads during operation. A control device for the system for collecting measurements and supplying voltage to the boundary electrodes of the sensing element is considered and an algorithm for its operation is described. The implementation method is proposed and the simulation results of this system are presented.

Keywords: defect monitoring, non-destructive testing, electrical impedance tomography, modeling, sensitive element, functional diagram

Currently, the drone is used in many situations where a manned flight is considered difficult, too risky, or in some cases impossible. In recent years, drones (drones) have become very popular due to their ease of use and their versatility. The urgency of the task of synthesis of control systems for unmanned aerial vehicles is characterized by the complexity of their mathematical model and a large number of experimentally determined parameters. This article proposes a methodology for designing a model of a regulatory system with a fuzzy logical controller. The results of simulation of a system with a fuzzy logic controller are presented.

Keywords: quadrotor, UAV, fuzzy-logical control, dynamics, roll, pitch, Yaw

The article deals with the power supply of the microcontroller core, which allows you to adjust the voltage to ensure the necessary balance between performance and power consumption of the system. When using this source, the core power supply voltage depends on the fill factor of the pulse-width modulated generator. These expressions allow you to adapt the proposed source for a microcontroller with an arbitrary power supply voltage.

Keywords: microcontroller, microprocessor system, embedded system, stabilizer, core power, performance, power consumption, video surveillance system, pulse-width modulation, fill factor