bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determination of the Design Characteristics of Heat Exchange Equipment for Heating Network Water of a Cogeneration Gas Turbine Unit with a Change in the Heat Load of Consumers in Regions with Different Climatic Conditions
Authors: Kler A M , Stepanova E L , Zharkov P V 
Published: November 2021

Abstract
Optimization studies of the dependence of fuel consumption on changes in the heat load of consumers in regions with different climatic conditions and taking into account the determination of the design characteristics of the equipment for heating network water of a cogeneration GTU were carried out. The GTU has two fuel combustion chambers, a waste-heat boiler and a contact heat exchanger for heating of feeding network water. Schematic-parametric optimization studies were carried out on the design mathematical model of the GTU. The analysis of the data of the circuit-parametric optimization made it possible to conclude that for the operating modes of the gas turbine plant with a higher thermal load, it is advantageous to slightly increase the heating surface area of the heater of feeding network water, the cost of materials for the manufacture of which is lower than for the waste heat boiler. This technical solution provided a relatively low increase in specific capital investments with full provision of consumers with electric and thermal energy. The data obtained in this work can be used to select the optimal technical solutions that ensure competitiveness in the operation of a cogeneration gas turbine unit in regions with different climatic characteristics.
Analysis and Classification of Low Head Hydro Power Based on Advanced Morphological Approach
Authors: Rakov D L 
Published: November 2021

Abstract
The paper discusses hydrokinetic systems low head hydro power as an element renewable resource. In the paper a review of the existing and upcoming orthogonal and axial turbines schemes is outlined. Based on a morphological approach comprehensive survey of various schemes and qualitative comparison, is presented. The proposed engineering solutions reduce the structure weight and the processability increases. These factors lead to a decrease in the cost. The engineering solutions under consideration are designed to operate in low-pressure flows, regardless of their direction. Thanks to these features, the scope of their use expands. They can be used both in high tide and in the use of the sea currents kinetic energy.
Recovering Information from Wireless Sensors in Hardware and Software Platforms
Authors: Zverev M , Vostrikova V , Teselkin D 
Published: November 2021

Abstract
The work considers the task of information processing in a subsystem of the hardware-software platform of the simulator complex - a mobile system of simulating isolation breathing apparatuses. The problem of predicting values when data packets are lost during their wireless transmission has been revealed. To solve the problem, an algorithm for data processing based on neural network technology has been developed, which allows reducing the number of data packet losses by predicting the lost values. The experimental studies confirmed the adequacy and effectiveness of the proposed algorithm. The use of neural networks in solving the problems of information processing has improved the accuracy of this process.
New Method for Adjusting Coefficients PI Conroller in the Load Control System of the Shearer
Authors: Shprekher D M , Zelenkov A V 
Published: November 2021

Abstract
The paper proposes a method using extrapolator models to predict the parameters of the PI controller. With a sudden change in the resistance of coal to cutting, in particular, at different levels of steps and their combinations, the speed of the cutting current controller and current steps also differ, the quieting time of the transient process also occurs in different times. To implement the adjustment of the coefficients of the PI controller, a feed forward artificial neural network is used, which acts as an operational means of recognizing a multidimensional response curve in the control loop. Neural networks of two architectures were used: with a scalar and vector output function. The recognition result is the estimated level of the step in the coal’s resistance to cutting based on the initial counts of the multidimensional response curve at the specified coefficients of the PI controller. The approach proposed in the article can be used in solving other applied problems in which the control object is nonlinear and the control algorithm needs to adapt to the changing unobservable effect on the object.
Cyberspace: Key Properties and Traits
Authors: Fedorov V Kh , Balenko E G , Starodubtsev Yu I , Zakalkin P V 
Published: November 2021

Abstract
Backbone telecom networks have become one, which created an artificially global space known as cyberspace. The very emergence of such a complex space calls for detailed investigation and making a thesaurus. This paper is an attempt to create a terminology base applicable to the concept.
Development of a Method for Building a Trusted Environment by Using Hidden Software Agent Steganography
Authors: Fedorov V Kh , Balenko E G , Shterenberg S I , Krasov A V 
Published: November 2021

Abstract
For more than a decade, the scientific community has been developing various models of insider actions in the trusted-zone information system and methods for identifying such. All those years, they have been facing the challenge of finding quality data samples for analysis and testing, and it is the availability of reliable data on the attack that is crucial for any research or detection of attempts to steal or compromise legal software. Unfortunately, collection of such samples remains nearly impossible despite some attempts to do so. Any data on incidents is either incomplete or inaccurate, or is not available at all.
Software developers also face lack of resources, including time. Developers do not have enough time, funding, material resources, or qualifications to make a sturdy security system, which is why they need to use third-party automations that dock a security module to the compiled program. The strength of this approach is that such a system can be embedded in any software, whereas the weakness is that the method is "one-size-fits-all". Standard protections span across multiple programs, which results in a higher chance of being hacked.
The Influence of a 3D Model of a Radio Electronic Component on Thermal Simulation
Authors: Bashkirov A V , Glotov V V , Bobylkin I S , Balashov Yu S , Kushnarev A S 
Published: November 2021

Abstract
Very often, when designing and developing radio electronic devices, engineers are regularly faced with the need to solve various kinds of problems to ensure the operation of a product under the required mechanical loads or thermal conditions during operation. One of the main issues that arise when conducting thermal modeling of radio electronics is the correct assessment of the results. There are a number of electronic components that need to be cooled, mainly through a printed circuit board: power supply transistors, power diodes, microcircuits, etc. For such elements, 90% (or more) of the heat flux from the component is diverted through the printed circuit board, and then to the radiator. Therefore, when carrying out the simulation, it is necessary to have previously obtained reliable temperature results on the power elements. The use of a detailed 3D model for modeling is most often unjustified and can introduce certain errors in the calculations. This article compares different 3D transistor models and the effect of detailing on the modeling process in CAD SolidWorks.
Possibility of Using Alternative Electric Power Industry for Power Supply of Autonomous Infocommunication Complexes
Authors: Vegera D V , Zhiba G V , Pisarenko V P 
Published: November 2021

Abstract
This article analyzes the possibility of using non-traditional – solar and wind power engineering to ensure the autonomous functioning of infocommunication facilities operating without the constant presence of personnel. The technical characteristics of the main functional elements and the conditions for their interaction in the power supply system of the communication object are given. The main results obtained during the operation of the experimental scheme of autonomous power supply are shown.
Methods and Algorithms of Turbojet Engines Thrust Parameters Control Unerroric
Authors: Burova A Yu 
Published: November 2021

Abstract
This report shows a real way for solving the problem of turbojet engine thrust parameters control in flight. The purpose of the research is the formalization of the digital methods and its algorithms for turbojet engines thrust parameters control unerroric. The methods of deductive digital signal processing and combined method of system analysis and approximate synthesis are used for such research. It is described the digital algorithms of unerroric methods wich are based on rotor speed control for turbojet engines of twin-engine airliner by its power plant control system. There are given the calculation formulas for those algorithms.
Information-Measuring System to Measure Fluid and Granular Media Flow Velocities in Pipelines
Authors: Akhobadze G 
Published: November 2021

Abstract
All articles must contain an abstract. The abstract text should be formatted using 10 point Times or Times New Roman and indented 25 mm from the left margin. Leave 10 mm space after the abstract before you begin the main text of your article, starting on the same page as the abstract. The abstract should give readers concise information about the content of the article and indicate the main results obtained and conclusions drawn. The abstract is not part of the text and should be complete in itself; no table numbers, figure numbers, references or displayed mathematical expressions should be included. It should be suitable for direct inclusion in abstracting services and should not normally exceed 200 words in a single paragraph. Since contemporary information-retrieval systems rely heavily on the content of titles and abstracts to identify relevant articles in literature searches, great care should be taken in constructing both
Evaluation of Graphical User Interfaces by the Search Time for Information Objects
Authors: Sineshchuk Y , Terekhin S , Saenko I , Kotenko I 
Published: November 2021

Abstract
The paper discusses the problem of poor quality of graphical user interfaces used for various software products. The provided analysis shows that modern software has poor-quality interfaces, and there are no flexible programs for evaluating such interfaces. The paper highlights and describes the characteristics that are used to assess the quality of interfaces, such as operator speed, error rates, skill retention, and subjective satisfaction. A formalized approach to assess the speed of searching for information and functional objects is proposed. It is based on such characteristics as the time of fixation of the gaze, movement of the eye, the volume of a person’s operative memory, the zone of clear vision, the path of the user’s gaze information search. An algorithm for estimating the speed of searching for information and functional elements is proposed. This algorithm can be implemented and used for further design of a software application based on it. The algorithm makes it possible to automatically evaluate both a particular interface and to compare the interfaces of different programs.
Study of the Possibility of Creating Autonomous Low-Power Thermal Power Plants Using Alternative Energy Sources
Authors: Shubina A S , Marin G E , Akhmetshin A R 
Published: November 2021

Abstract
The areas of use of low - capacity power plants are very wide: industrial enterprises, medical institutions, residential cottages, business centers and other objects of large cities; main gas pipelines, gas distribution stations, oil pipelines that need energy supply for normal operation; enterprises for processing household waste; developing areas of the country where there are currently no energy sources and power lines; energy-deficient areas of the Far North, Far East, and some Non-Chernozem regions; small towns, cottage settlements and villages, in many of them the issue of centralized heat supply; large livestock farms, enterprises for processing agricultural products, enterprises of the logging industry, etc.
In this study, an important problem for oil fields is considered - utilization of associated petroleum gas. Low-power power plants are considered as a combustion engine. It is important to note that high-quality fuel treatment is required for internal combustion engines or gas turbines. The proposed scheme of associated gas utilization based on a small power plant is not fuel-intensive. Studies of compressor and turbine matching are presented, resulting in an optimal range of operating areas. These results allow us to determine the limitations for the operation of the power plant.
Improving the System Efficiency of CHP in the Context of Increasing Requirements for the Maneuverability and Environmental Friendliness of Power Plants
Authors: Beloborodov S S , Dudolin A A , Lisin E M , Kindra V O 
Published: November 2021

AbstractNew trends in the fight against climate change on the planet, suggesting a reduction in greenhouse gas emissions, are influencing the formation of a new structure of the electric power system. As the experience of the European Union shows, the active development of renewable energy sources affects the electrical modes of operation of power plants and in the future can lead to a decrease in electricity production in a highly efficient combined generation mode at CHPPs. Thus, there is an acute issue of finding a place for a CHP plant in the emerging power systems, in which generating equipment will be especially in demand, effectively operating in half-peak and peak modes to cover the daily load unevenness. The development and commissioning of a highly maneuverable GTU-CHPP, capable of operating in a combined generation mode with daily starts / stops, can significantly increase the efficiency of electricity generation in the peak part of the daily load schedule. The system effect of the commisionning of 10 GW of highly maneuverable GtU-CHPPs within the UES of Russia will reduce the consumption of fossil fuel by 19.6 million tce per year and CO2 and NOx emissions by 55 million tons and 24.7 thousand tons per year, respectively.
Modelling the Temperature State of Bodies with Internal Heat Sources
Authors: Eremin A V , Gubareva K V , Popov A I 
Published: November 2021

Abstract
This article presents the results of the development of a numerical - analytical method for solving the problem of thermal conductivity in a plate fuel element. An unsteady temperature field inside a fuel element is investigated for a given spatial distribution of heat sources. The heat release rate is given by the quadratic function of the coordinate. Modeling the temperature state of bodies with internal heat sources allows you to study the operation of equipment in transient modes, control heating/cooling modes of elements, determine temperature stresses, etc. It is shown in the work that regardless of the power of internal sources of heat, the temperature state is stabilized at a temperature level that depends on the Pomerantsev number.
Flicker in the Networks with Distributed Generation Plants and Its Removal Using Group Prognostic Controller
Authors: Bulatov Yu N , Kryukov A V , Suslov K V 
Published: November 2021

Abstract
The use of distributed generation (DG) plants in electrical energy system (EES) produces unambiguous effect on power quality. The presence of DG plants allows to reduce losses associated with power transmission and maintain the required voltage levels. In this case, the presence of DG can cause voltage fluctuation, leading to the appearance of flicker, which is understood as a feeling of instability of visual perception. Similar processes can occur at sharp disturbances close proximity to the DG. The situation can be aggravated by improperly configured DG generators controllers. Therefore, it is necessary to conduct an accurate assessment of the DG plants impact on the power grid, which is a rather time consuming task. The article presents results of the EES working modes simulation with a DG plant implemented on the basis of synchronous turbine generators. The results obtained indicated that during temporary connection of heavy load in the connection unit of DG plant and the use of non-concordantly tuned controllers, there are fluctuations in rotor speed and voltage of generators, the analysis of which indicates the presence of flicker. The same effect can obtained a sudden change in the forecast time for individual controllers of turbine generators speed. Flicker can be removed by applying group control of generators speed controllers.
Comparative Analysis of Deep Neural Networks Architectures for Visual Recognition in the Autonomous Transport Systems
Authors: Ivanov Y S , Zhiganov S V , Liubushkina N N 
Published: November 2021

Abstract
This paper analyses and presents an experimental investigation of the efficiency of modern models for object recognition in computer vision systems of robotic complexes. In this article, the applicability of transformers for experimental classification problems has been investigated. The comparison results are presented taking into account various limitations specific to robotics. Based on the results of the undertaken studies, recommendations on the use of models in the marine vessels classification problem are proposed
Measurement of Impurity Concentration in Turbulent Flows of Ventilation Systems Channels
Authors: Sokolov V , Krol O 
Published: November 2021

Abstract
The work is devoted to the experimental study of the process of impurities diffusion in the circular cylindrical channel and the determination of the coordinates of the average concentration of impurities in the turbulent flow. To ensure the uniformity for the aerosols composition during the studies, the experiments were carried out with solid particles of narrow fractional composition. The use of fine-grained oxide catalyst made it possible to obtain the almost monodisperse material. The experimental installation included the volumetric doser for impurity material, the ejector, the concentration sensor, the section of the vertical pipeline, and manometers for recording the pressure in the system. It is shown that the theoretical and experimental results are in satisfactory agreement with each other, and the existing discrepancy can be explained both by the measurement error and by the presence of spiral motion for the solid phase in the ascending flow. Based on the experiments, it was concluded that the known mathematical positions are adequate and internally not contradictory models of the diffusion process of the impurity substance in the turbulent flow, which can be used to analyze the distribution of the impurity concentration in the channels of the ventilation systems. The results of the studies performed should be taken into account when developing systems for measuring and monitoring the gas-air emissions characteristics of the ventilation systems of industrial enterprises.
Method of Formation of Reference Control Signals for Redundant Manipulators
Authors: Filaretov V F , Gubankov A S , Gornostaev I V 
Published: November 2021

Abstract
The paper is devoted to preservation of dynamic control accuracy of working tools of multilink manipulators when they move along arbitrary spatial trajectories, taking into account the design limits in all degrees of freedom and special cases of position of their links. Preservation of control accuracy is proposed to be ensured by eliminating reach of all degrees of freedom of the manipulators to the limits and to indicated special positions, characterized by ambiguity in solving the inverse kinematic problems of the manipulators, as well as excluding the reach of their working tools to boundaries of working area due to use of a redundant degree of freedom when approaching indicated undesirable positions. The performed simulation has confirmed efficiency of the proposed method.
Analysis and Study of Designs of Sensing Elements of Speed Sensors Based on the Wiegand Effect
Authors: Mikhailov P G 
Published: November 2021

Abstract
Speed sensors are used in various products and systems of mechanical engineering, instrument making, flight and rocket and space technology. At the same time, the main requirements for such sensors include a wide range of measured revolutions, from almost zero to several thousand revolutions per minute. Another requirement is a range of operating temperatures, ranging from cryogenic to temperatures of several hundred degrees. In this case, a prerequisite should be a generator method of conversion, in which energy is not consumed from the outside, but it is generated during the operation of the sensor. The principle of operation of the speed sensor is based on the magnetic pulse mode, in which a private hysteresis loop is formed. The generation of such a characteristic is possessed by mechanically and thermally treated wire made of cobalt-iron-vanadium alloy 52K9F of uniform composition. As a result, the wire acquires a composite magnetic structure consisting of an external hard magnetic layer - a shell, a central soft magnetic layer and an intermediate layer. The layers have different properties, due to which the hysteresis loops of the Wiegand wire have a complex shape. A distinctive feature of the loops is the presence of practically vertical sections of magnetization change - discontinuities corresponding to an abrupt change in the magnetization of the material. The large discontinuity on the loops arises due to the so-called "Barkhausen jump", caused by an almost ideal single magnetic domain stretched along the axis of the wire in its core.
Methods of Estimating the Form of the Probability Distribution Density in Tasks of Processing Measurement Results
Authors: Artyushenko V M , Volovach V I 
Published: November 2021

Abstract
Issues associated with methods for estimating the shape of the probability distribution density curve are analyzed in order to classify them when processing measurement results. For example, such nonparametric methods as the method of histograms and frequency polygon, as well as the method of classification of distributions, are considered. It is shown that the values of the anticurtosis and entropy coefficient can be taken as independent features of the form of symmetric distributions. For probability distribution densities that have a one-sided character, such as multiplicative noise, a skewness coefficient should be added to the parameters to consider. Recurrent procedures for obtaining current estimates of numerical characteristics of analyzed random processes are given. The results of processing a random process based on recurrent procedures are presented. It is shown that when the number of samples increases, the estimates obtained by using recurrent and non-recurrent procedures converge. The scattering of estimates of probability distribution density parameters, such as variance, relative mean square error, and entropy error, is determined.
Algorithm of Dynamic Forming One Whole Raster Photo Map of the Seabed During its Shooting by an Autonomous Uninhabited Underwater Vehicle
Authors: Timoshenko A A , Zuev A V , Mursalimov E S 
Published: November 2021

Abstract
An algorithm has been developed for creating one whole raster photo map of the seabed from images obtained from vertically downward cameras of autonomous underwater vehicles (AUV) using tile graphics. Tile representation of graphical information allows to quickly access the images after lifting the AUV to the surface and reduce the time spent by the operator to analyse the results of the mission. The images were combined using simple geometric transformations based on the data received from the navigation systems of the AUV and the parameters of its camera, so the algorithm can be implemented on the AUV with low-performance onboard computer, as shown in the experiment.