The paper is devoted to the problems of the aerodrome automatic direction finders accuracy characteristics checking. Disadvantages of the existing methods are shown. Recommendations to eliminate shortcomings are given, in particular it is proposed to take into account the orthodromic corrections to the measured values of the bearings during the flight tests.

Keywords: radio direction finder, flight tests, orthodromic correction, instrumental error

This article discusses the problem of network authentication of a client when a functional web-system consists of various services, each of which is represented by a separate site. Particular attention is paid to Single Sign On technology - a single entry point as a way to achieve centralized authentication. A comparison of tools that provide a single input is given, and a conclusion is made about the best of them. Based on the research, the author proposes the Gluu single entry point server as a server that satisfies all the requirements of the functional service system presented in the example, and also able to work within the framework of popular authentication protocols.

Keywords: functional service system, authentication, authentication protocol, single entry point, single entry point server, comparative analysis

In this paper, the time of manufacturing of nuclear industry products is estimated depending on the complexity of technological operations, the time to justify the choice of manufacturing options, and the performance of mandatory research and development work . The time factor as an element of the system of technical progress is presented on the practical example of replacing heavy Metalworking equipment with mobile small -sized units.

Keywords: time factor estimation, shell, steam generator, roller stands

"The article is devoted to solving the problem in the field of development of methods and means of automation of evaluation of training efficiency on computer simulators, which are used for the training of operators of production processes. Approaches to assessing the effectiveness of training are given in many scientific studies on the creation and application of computer simulators. However, the problem of automation of the process of this assessment on the basis of the simulators themselves is not sufficiently considered. The evaluation methodology (based on mathematical statistics methods) and the prototype subsystem of the computer simulator complex were proposed to solve the indicated problem. They reduce the effort of the expert responsible for performance evaluation. Output results can be used for training operators in educational organizations. The reported study was funded by RFBR according to the research project № 18-38-00835. "

Keywords: computer simulator, mathematical statistics methods, efficiency of training process, automation of training process

The granulation process of ammophos in a drum granulator-dryer (DGD) is considered. The main factors affecting the granulation process are considered. The inputs and outputs of the mathematical model of the granulation process are determined. A dynamic mathematical model has been developed for the formation of the equivalent diameter of ammophos granules depending on the flow rate and particle size distribution of the external recycle. Graphs of comparison of simulation results with actual data of normal operation are presented. A graph of the dependence of the equivalent diameter of the granules on the flow rate of external recycling is presented. The model is intended to create a system for stabilizing the granulation mode.

Keywords: ammophos, recycle, granulation, particle size distribution, drum granulator-dryer, modelling, mathematical model

Currently, the problem of increasing the efficiency of managing resource-intensive tasks in distributed computing systems is quite acute. Analysis of existing task dispatching algorithms for traditional computing systems showed the limitations of using these methods in heterogeneous systems, as a result of which significant delays can occur between task switching.A functional mathematical model for estimating the workload of distributed computing systems is proposed, based on determining the probability of downtime of the processing center as a criterion for assessing the system load. Using this model will provide increased efficiency in managing resource-intensive tasks in distributed computing systems.

Keywords: mathematical model, distributed computing system, processing center, loading

In this paper proposed a method based on evaluation characteristics using reference points for cross-linking frames of images obtained from unmanned aerial vehicles. We analyze multi-route (area) aerial photography, which allows you to get images of the area from several parallel routes. The model developed by the authors for detecting reference points of aerial photographs obtained from any type of survey equipment carrier can be used for a wide range of tasks related to the reconstruction of anthropogenic and natural objects and the construction of 3D models for architecture and topography based on digital images.

Keywords: aerial images, image recognition, reference point detection, photo map, unmanned aerial vehicles

The article discusses several equivalent circuits constructed by sequentially connecting circuits for the membrane and protoplasm. The solution was made using the Cardano formula for cubic equations. The roots in the expression for the determination of resonant frequencies determined the resonant frequencies for the given parameters for the membrane and intercellular fluid; to obtain numerical values, values ​​were used within several permissible limits. In the course of the calculations, it was confirmed that most resonant frequencies are in the millimeter and submillimeter ranges. It is also shown that the cell vibration frequencies occupy the decimeter, centimeter, millimeter and submillimeter wavelengths. Obviously, it is the impact on biological systems of electromagnetic radiation in the indicated wavelength ranges that will be most effective and can lead to a maximum biological response (effect).

Keywords: equivalent equivalent circuit, biological structure, membrane, oscillatory circuit, Cardano formula, protoplasm, resonant frequencies, electrical processes, equivalent equivalent circuit, electromagnetic radiation

The current problems of calculating the distribution of water flow along the branches, in multi-arm river sections are considered, the problems of current calculation methods are identified, a new calculation method is proposed, the proposed method is analyzed for efficiency, a calculation optimization method is proposed, a regularization parameter is proposed, an analysis of the changed formulas is carried out, analysis of the changed formulas is carried out, analysis is carried out calculation errors.

Keywords: waterways, water expenditures, modeling

The paper is based on a review of the scientific publications released from May through October 2019, the greater part of which, namely 14 papers, is included in the Web of Science scientometric database. The authors of the papers analyzed explore the construction industry problems over the past 5 years. The foreign studies listed in the reference section were based on the analysis of reviews falling in the above-mentioned timeline. The purpose of this paper is to identify the problems hindering the implementation of BIM technologies in the construction sector, not only in the foreign countries, but also in Russia.

Keywords: building information modeling, construction organizations, critical problems, external factors, absence of organizational support

This article is a short review of modern three-dimensional printers used in additive construction production (ASP). The main goal of the article is to analyze the main types of existing 3D printers for ASP. The features of their design and methods of use are described, as well as their advantages and disadvantages when used in additive construction production are identified.

Keywords: construction, additive building production (ABP), additive technology (AT), building 3D-printing, extrusion 3D-printing, building 3D-printer

The directions of modern research in the field of adaptive error correction, which can be applied when transmitting images in JPEG 2000 format over a noisy channel, are examined. Adaptive correction at the network level allows you to maintain a given percentage of packet delivery. Uneven protection at the application level is intended for use in broadcast broadcasts and allows the consumer to receive an image of various quality depending on the state of the network. Adaptive uniform protection at the application level is focused on point-to-point transmission and is aimed at receiving the maximum image quality by the receiver. The network layer tools discussed can be combined with the application layer tools.

Keywords: adaptation, noise-proof coding, forward error correction, noisy channel, JPEG 2000

In the framework of ensuring a high level of products and in order to increase its competitiveness, the development and implementation of quality management systems at the enterprise can be considered an urgent task. Among the main processes of the QMS, a special place is taken by corrective and preventive actions. Management of this process, in turn, requires regular evaluation of the effectiveness of these activities. The article provides a methodology for evaluating the effectiveness of corrective and preventive actions in the production of solid medicines.

Keywords: corrective actions, preventive actions, unplanned non-conformities, non-conforming products, efficiency analysis

Updating and expanding the road network, even with good funding, is not keeping pace with the ever-growing number of vehicles. One of the ways to solve this problem is to develop a direction in the field of creating intelligent transport technologies. In the work, the operability of the road regulation method was checked based on the analysis of the influence area of ​​the delay point when working on the road network, the conditions for minimizing the delay points on the road network were identified. And also presents the logical design of an automated system for traffic management based on the proposed method of road regulation.

Keywords: delay points, influence area of the delay point, simulation, traffic control, traffic, mathematical model, ITS

The work is devoted to the study of the main aspects of the use of expert systems in the metallurgy industry. An overview of current production problems is given, as well as prospects for the development of automatic decision-making systems based on formalized expert knowledge using modern data processing tools

Keywords: production processes, metallurgy, control actions, expert systems, technological personnel, production indicators, software implementation, modeling, interference, training complexes

The paper describes the design of a magnetic stimulator for studying the effect of ferromagnetic nanoparticles on biological objects in a magnetic field. In a magnetic stimulator, an electromagnet acts as a source of exposure, which creates an alternating magnetic field. To register the magnitude of the magnetic field created a special device based on Arduino. The presented magnetic stimulator can be used in the study of biological objects in vitro and in vivo. The stimulant is made of inexpensive, readily available components.

Keywords: magnetic stimulator, ferromagnetic nanoparticles, alternating magnetic field, electromagnet

Launch and control circuit systems built on traditional devices represent complicate multi-link system. Its liability is determined by a number of intermediate devices. Launch jaggedness – is one of the significant flaws, negatively affect on launching process dynamics. Promising direction of launch and control circuits devices are rheostats built on high current semi-conduct polycrystalline thermistors. At the article short analysis of electrotechnical devices launch processes is given. A power engines launch process with thermistor rheostats is considered and formulated a number of limits. Graphic dependences characterizing launch current and rotating moment at direct launch changing and with rheostats on thermistors are given. An example of launch current for asynchronic engine with phase rotor calculating is given as well.

Keywords: semiconducting thermos-resistance, launch rheostat, launch currents curves, generalized constant, automation.

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

Systems that allow generating programs for monitoring the state of technical objects are explored. The generation of programs involves the construction of models of objects from the data received from them and the construction of data collection processes. The dependences of the complexity of the generation of models of monitoring objects on the dimension of the input stream, the dimensions of the characteristic vectors describing the state of the elements of the objects of monitoring, as well as the dependences of the complexity of the generation of data collection processes on the number of structural levels of objects, the number of information elements on each level, and the probabilities of generating processes on each of the levels. Based on the results obtained, recommendations are formulated on the use of monitoring program generation systems in solving practical problems in particular domain: recommendation on selecting right balance between often and rare model rebuilding and expediency criteria of the monitoring process generation system usage.

Keywords: complex technical object, monitoring, program generation

The article presents a system for monitoring the technical condition of technological mechatronic objects using a neural network of state analysis. The aim of the work is to increase the reliability of the equipment, reduce the number of sudden failures and emergencies by assessing the dynamic state of the spindle unit of the mechatronic technological object. A method for diagnosing the state of the spindle unit of a mechatronic object using a neural network based on the time domain features of vibration signals is proposed and applied. The structure of the neurosystem is proposed. The data obtained during practical tests, as well as the structure of the neural network for diagnosing the state of technological mechatronic objects, are presented.

Keywords: state control, mechatronic object, neural network, spindle unit, vibration signal, time domain features

V stat`e privoditsya obzor razvitiya cifrovy`x texnologij v neftyanoj otrasli v ramkax kapital`nogo stroitel`stva i operacionnoj deyatel`nosti.

Keywords: "Permafrost soils, ground laying, aboveground laying, protective composite coating. "

The article describes in detail the algorithm for constructing a mathematical model that allows you to describe the process of processing a spherical surface, provides an analysis of the change in the radius of the cutter, which allows you to choose the optimal cutting conditions and create conditions for automation of the process.

Keywords: Software, process automation, spherical surface, spherical surface treatment.

The article deals with the reducing issues the time spent of making informed decisions by automating the workplace of a transport engineer on the basis of the development and use of methods for selecting and calculating the number of vehicles for servicing remote objects. A specific example based on the transport service of electric power facilities, which can be implemented in any software of the organization, is considered

Keywords: Workplace automation, transport operation engineer, transport service, electric power facility, calculation of the number of vehicles.

The increasing load on the power supply system of electrified railways leads to higher requirements for reliability of power supply. Clarifying the criteria for the operation of the automated system to combat ice formation on the wires of traction power supply to railways in difficult weather conditions is an urgent task aimed at improving the reliability of uninterrupted power supply of rolling stock

Keywords: ice melting, calculated coefficients, selection of optimal parameters, traction power supply system

The trend of the transition of autonomous vehicles from internal combustion engines to electric drives leads to the need to find intermediate solutions. Hybrid transport is currently a fairly popular compromise. Improving its energy efficiency is possible in several ways. This article shows a software method based on dynamic programming, which allows you to optimize fuel consumption by separating the use of an internal combustion engine and an electric drive. Dynamic programming solves recursive optimization problems when sub-tasks are recounted several times. Also, in this work, mathematical modeling of the car’s movement pattern and determination of the optimal distribution of speed and battery charge depending on the number of fractional bits are carried out. The development of dynamic programming from the point of view of hardware implementation is possible using Field-Programmable Gate Array (FPGA).

Keywords: Hybrid transport, mathematical modeling, dynamic programming, programmable logic integrated circuits, internal combustion engine, electric drive