bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prediction of technological process parameters in aluminum production based on artificial neural networks
Authors: Mikhalev A S , Lugovaya N M , Penkova T G 
Published: November 2020

Abstract
The paper presents the theoretical aspects to construct a decision support system for assessing the technical condition and efficiency of the technological process in aluminum production. The key parameters that characterize the technological state of the electrolysis cells include the cell voltage, amperage of anodes and “noise”. This study is aimed at methods of machine learning as it relates to forecasting these parameters. Forecasting relies on recurrent neural networks. The method of maximum accuracy was used to elicit the neural network architecture. The results obtained in the tests run on the suggested model of forecasting are deemed acceptable in terms of predicting the technological process indicators. The introduction of the decision support system into the production management process will allow us to timely detect the technological disruptions and take measures to prevent their occurrence, which in turn will increase the efficiency of aluminum production.
Theoretical explanation of the ultrasonic action pulsed mode on liquid to reduce cavitation
Authors: Golykh R N 
Published: November 2020

Abstract
The article is devoted to theoretical studies of the possibility of reducing cavitation in a medium by using a pulsed exposure mode. A model of the formation and propagation of pulsed ultrasonic vibrations in a liquid is proposed. Pulse shapes are obtained taking into account the distortions arising in the technological volume. On the basis of the identified shapes, the shapes and positions of cavitation zones were calculated, which showed a decrease in the volume of zones in which cavitation bubbles arise under impulse action compared to continuous.
Modeling the spread of pests and forest fires to assess the quality of plant raw materials in the forestry complex
Authors: Marchenko R A , Yarovoy S V , Shurkina V I 
Published: November 2020

Abstract
The Krasnoyarsk Territory and the Siberian region as a whole have the largest reserves of forest resources among the regions of Russia. However, the problem of rational and integrated use of forest resources is becoming more and more urgent. The presence of a large volume of unclaimed wood resources, including in the form of wood damaged by pests and forest fires, requires the development of methods that allow processing such wood using the optimal technology. Such research has been carried out by the scientific laboratory “Deep processing of vegetable raw materials” of the Reshetnev Siberian State University of Science and Technology. For information support of such studies, it is necessary to be able to assess the volume of damaged wood based on the forecast of the dynamics of processes affecting wood, taking into account external control influences. The aim of this work is to develop models and algorithms with which this forecast can be carried out. The article discusses the processes of the spread of pests and forest fires as objects of modeling, examples of such processes are considered. A method for describing the dynamics of distributed processes in the language of classical mechanics, as well as an agent-based simulation model of the dynamics and localization of the processes of the spread of insect pests and forest fires, is presented. The work of the model is based on GIS data and is reflected on a map of the real area. The model uses several types of agents that imitate both the process itself and the fight against it.
Development of the algorithm for graphematic analysis and isolating of semantically significant constructions in poorly structured text
Authors: Rabin A V , Petrushevskaya A A 
Published: November 2020

Abstract
The article presents the results of analyzing the process of detecting patterns in semi-structured and unstructured texts. Text preprocessing is aimed at removing terms that do not carry useful information, bringing the words of the text to a single representation and forming a set of indices of a text information resource - statistical, linguistic, structural. An algorithm for graphematic analysis has been developed as the first stage of automatic processing of texts in natural language. The algorithm makes it possible to single out semantically significant natural language constructions in a semi-structured text using graphematic descriptors, to detect and replace abbreviations and abbreviations.
Towards the structuredness of non-coding regions of chloroplast genomes
Authors: Gorban I K , Senashova M Yu , Sadovsky M G 
Published: November 2020

Abstract
A triplet frequency dictionary is stipulated to be a structure of non-coding DNA fragments of chloroplast genomes. We retrieved the ensembles of the non-coding regions from 391 terrestrial plants and studied the distribution of the fragments in the Euclidean metric space. An interplay between the cluster composition of the set of the dictionaries and the taxonomy of the genome bearers was analyzed.
Hybridization of linguistic and statistical methods of text analysis for describing the subject area in the form of a fuzzy ontology
Authors: Rabin A V , Petrushevskaya A A 
Published: November 2020

Abstract
The algorithm for selection of n-words and formation of a description of the subject area in the form of a fuzzy ontology based on the hybridization of linguistic and statistical methods of text analysis has been developed. The input data of the algorithm are text sequences in machine language, the result of the algorithm operation is the description of the subject area in the form of a fuzzy ontology. The definition of classes of fuzzy ontologies in accordance with the source code is carried out using several machine learning algorithms that combine methods of data preparation and prediction. Methods “Bootstrap”, “Bagging” and “Random forest” were used to classify text sequences. A feature of the developed algorithm is the need to represent ontology objects mainly in the form of one-words with maximization of the number of relations between objects.
Ensembles of optimal binary sequences of length 22n
Authors: Leukhin A N , Bezrodnyi V I , Voronin A A , Merzlyakov A S , Parsaev N V 
Published: November 2020

Abstract
The problem of constructing ensembles of optimal binary sequences of arbitrary period is of great practical importance and urgency, as the electromagnetic spectrum is becoming increasingly congested. The solution to this problem will allow designers of asynchronous wireless communication systems to overcome this congestion, by using ensembles of sequences tailored to their system requirements. This work aims to develop a systematic method for constructing ensembles of sequences with optimal correlation with arbitrary period. Optimality can be strict, or asymptotic, as the period tends to infinity. The problem is of fundamental importance in information theory, with wide-ranging applications to wireless communications, navigation, radar, digital watermarking, and related fields.
Features of application of informational networks in the field of transport infrastructure
Authors: Zolkin A L , Aygumov T G , Aygumov K G , Malikov V N 
Published: November 2020

Abstract
The concepts of universality and general applicability of information networks as well as the issues of using networks in specific directions are considered in the article on the example of the convergence of transport infrastructure and information networks. An analysis of modern information networks has been carried out and the following three main directions have been identified: infrastructure as a service, platform as a service, software as a service. The basic principles of convergence of information networks and transport infrastructure are presented on the example of a transport and logistics system. The issues of use of the modern information technologies for continuous monitoring of transport infrastructure are considered.
Investigation of the problem of classifying unbalanced datasets in identifying distributed denial of service attacks
Authors: Bolodurina I , Shukhman A , Parfenov D , Zhigalov A , Zabrodina L 
Published: November 2020

Abstract
This paper examines the impact of data balancing algorithms in the network traffic classification problem on various types of distributed denial of service attacks on the CICDDoS2019 dataset, which contains information about reflection-based and exploitation-based attacks. The results of computational experiments have shown the effectiveness of data balancing algorithms such as naive random sampling, synthetic minority sampling, and adaptive synthetic sampling in identifying network attacks. A comparative analysis of various data sampling approaches has shown that the adaptive synthetic sampling method with the random forest algorithm demonstrates the highest classification accuracy.
The study of current situation in the development of information and telecommunication networks within the Eastern Siberia territory
Authors: Chuvashova M N , Mylnikova A A , Gorbacheva A K , Druzhinin G V , Moskvitina N V 
Published: November 2020

Abstract
The territory of Eastern Siberia (Siberian Federal District) is characterized by non-homogeneous location of production and information facilities. The climate in most of the territory is sharply continental. There is widespread permafrost, mountain terrain and low population density in some places. Thus, these factors indicate that it is impractical to develop some parts of this territory. However, a number of industrial cities are located in the northern territories, thus supporting the development of ICT to link with regional centers. The article analyzes the current situation in the development of information and telecommunication networks within the territory of the regions of Eastern Siberia based on aggregated groups of statistical indicators in the period from 2005 to 2018. Drawing on the correlation analysis, a linear relationship was revealed between the selected statistical indicators. A comparative analysis of one of the statistical indicators was carried out according to all ten actors of Eastern Siberia. The diagram shows the ratio of the level of development within the territory of each region, which makes it possible to determine the level of development of information and telecommunication networks in detail.
Search for forms of a single-tube resonator of increased q-factor
Authors: Gadirova T T , Abdulova N A , Shirinova A V , Quliyeva A I , Kravets O Ja 
Published: November 2020

Abstract
The article is devoted to the search for forms of single-tube resonators of high q-factor for vibration density meters of a liquid. In tube resonators, the source of energy loss is the reactive forces that occur during vibrations in the places where the tube is fixed. Therefore, the search for high-q resonator forms is reduced to finding ways to reduce the loss of mechanical vibration energy in the supports. The existing methods of synthesizing resonator forms – heuristic and electromechanical analogies - are analyzed. The advantage is given to the method of electromechanical analogies, as scientifically justified. An algorithm for synthesizing the shape of a high-q resonator is formed. Using the proposed algorithm, a generalized form of a high-q resonator is synthesized, which is a rigidly pinched tube at the ends, symmetrical with respect to the vertical axis of symmetry, with three sections – the Central one and two identical peripheral ones, differing in their mechanical parameters from the Central one. In particular, the form of a resonator in the form of a tube with a step-variable cross-section is proposed.
Risks during the operation of technological equipment at a hazardous production facility
Authors: Valeev S I 
Published: November 2020

Abstract
The paper gives an overview of the performance of technological equipment subject to the influence of various kinds of defects. The possibility of reducing the operational risk during the operation of equipment with the considered defects is considered. Particular attention is paid to the influence of a defect in the base metal of the “delamination” type on the further safe operation of technological equipment. The design of equipment with flaking-type defects was performed by the finite element method using the ANSYS software package. The results obtained permit to conclude that delamination does not significantly affect the load-carrying capacity of the equipment as long as it does not propagate locally.
Research of vibroacoustic signals in diagnostics of technical condition of engines of beet harvesters combines
Authors: Rogovskii I L , Zapadlovskij O S , Voinash S A , Maksimovich K Y , Sokolova V A , Alekseeva S V , Taraban M V 
Published: November 2020

Abstract
The authors of the experimental studies have proved from the possibility of vibration signals to detect the faults and changes in the parameters of the technical condition of engines of beet harvesters combines at the primary stages of their occurrence. Ensuring the predicted reliability of the conclusions, regarding the technical condition of the mechanisms and system of the engine, it can be achieved using the statistical evaluation of the correspondence of the temporal frequency fragments of the vibroacoustic signals and their correspondence to the rotational speed of the crankshaft. The authors investigated the difference between physical models and methods of their mathematical description in different parts of the frequency range and proved the feasibility of dividing it into three frequency subbands: low (0–200 Hz), medium (200–1000 Hz) and high (1 to 10–20 kHz). The authors found out that the series of harmonic signals of engines are characterized by the amplitudes, frequencies and initial phases, whose algebraic sum of ordinates at any given time is equal to the ordinate of the non-sinusoidal signal. Therefore, the Fourier series should be written as the sum of an infinite number of harmonic components of different frequencies. To distinguish the spectrum of the vibroacoustic signal in the diagnosis of the technical condition of engines of beet harvesters combines, it is necessary to use a Fast Fourier Transform. The processing of vibroacoustic signals in the diagnosis of the technical condition parameters of engines of beet harvesters combines is carried out using digital filters, which are implemented by the author’s algorithm.
Ultrasonic tool for the realization of combined action during the drilling of extraterrestrial objects
Authors: Khmelev Vladimir N , Barsukov Roman V , Nesterov Viktor A , Genne Dmitry V , Quan Qiquan , Golykh Roman N 
Published: November 2020

Abstract
The article is devoted to the problem of the efficiency increase of ultrasonic drilling of hard materials for the studies of the soils of the planets, asteroids and other space objects. It is proposed the solution of the problem by the help of developed device, which is able to realize simultaneously with ultrasound the action by low-frequency macro-oscillations and rotational motion of the leading edge of the tool. The tests of the practical construction of the developed device showed the possibility of the speed increase of the ultrasonic drilling due to the additional low-frequency oscillations and pseudo-rotation in up to 1.5 times.
The model of energy distribution during electron beam input in welding process
Authors: Kurashkin S O , Tynchenko V S , Seregin Yu N , Murygin A V , Kukartsev V V , Tynchenko V V 
Published: November 2020

Abstract
Modeling is one of the most important parts of applied research, the processes for which carrying out full-scale experiments is either expensive or highly labor-intensive. The article deals with the problem of modeling the energy distribution at the stage of electron beam input during welding. The solution to this problem will allow not only to reduce the cost of testing the technological parameters of electron beam welding of products with new geometry or from new materials, but also to support the decision-making of the technologist when optimizing the manufacturing process of existing products. Based on the theory of thermal processes, mathematical models have been developed that consider the characteristics of the materials to be welded and the technological parameters of the electron-beam welding process. In the course of experimental studies, the energy distribution was simulated when the electron beam was introduced for structures made of two different materials with different geometries. The obtained models for calculating the temperature at the input section not only supplement the complex of existing mathematical models of the electron beam welding process, but also allow expanding their application for calculating and optimizing the welding process, taking into account the excess temperature at the electron beam input section. In the future, this will allow considering the temperature spread at the input stage and obtaining a more stable quality of the welded seam with fewer root defects.
Reconditioning of continuous casting machine rollers by laser cladding
Authors: Makarov A V , Kudryashov A E , Nevezhin S V , Gerasimov A S , Vladimirov A A 
Published: November 2020

Abstract
The article presents the results of research of structures, compositions and tribological characteristics of coatings for continuous casting machine rollers. The coatings under research were obtained by methods of arc and laser cladding. The experiments were carried out on cylindrical samples of steel 20Cr13. A flux cored wire PP-Np-25Cr5VMoSi was taken as a material for cladding by the arc method. Sparingly alloyed iron-based powder Fe-Co-Cr-Mo was chosen as the material for laser cladding. The estimation of coating properties was carried out by the method of structural and phase analysis. Friction coefficients and wear rates for each cladding material were determined. The article offers an explanation of the differences in the properties of the coatings, which is based on the analysis of their formation conditions, as well as an assessment of the effectiveness of laser cladding in reconditioning of metallurgical equipment parts.
Algorithm for calculating the distribution of temperature fields at the stage of input and output of an electron beam in the welding process
Authors: Kurashkin S O , Tynchenko V S , Seregin Yu N , Petrenko V E , Kukartsev V V , Tynchenko V V , Bukhtoyarov V V 
Published: November 2020

Abstract
The article deals with the problem of modeling the distribution of temperature fields at the stage of input and output of an electron beam during welding. The use of such models will make it possible to simplify the adjustment of the technological parameters of the electron beam welding process, as well as the creation and development of more efficient control algorithms by replacing full-scale experiments with model ones. The mathematical apparatus of the solutions proposed in the article is based on the theory of thermal processes and the theory of welding processes, on the basis of which mathematical models of energy distribution are built. For the practical implementation of computations, the article proposes a block diagram of algorithmic support that allows as to apply mathematical models in modern modeling systems such as MATLAB. Using the proposed solutions, a number of numerical experiments were carried out for a product made of VT-14 titanium alloy and two products of different thickness made of AMg6 aluminum alloy. The obtained distribution of temperature fields, as well as the effective values of technological parameters, practically coincides with the results of earlier full-scale studies.
Experimental study on parameters of Fabbster and Picaso 3D personal printers with XZ-Head Y-Bed and XY-Head Z-Bed kinematics
Authors: Brovkina Yu I , Strizheus V A , Shipilov P A 
Published: November 2020

Abstract
The use of additive technologies greatly simplifies the production of parts of complex shapes. Improving the quality and increasing the speed of printing are urgent tasks for studying the possibilities of applying 3D printing technologies. The experimental study of the kinematic characteristics of 3D printers, considered in the current article, enables to identify problem areas in the designs of existing models of devices for innovative production of non-standard configuration parts, which must be taken into account when designing new.
The assessment of stressed-deformed state of tube bundle of the heat-exchange apparatus with the fixed pipe grids
Authors: Zakirnichnaya M M , Rubtsov A V , Kulakov P A , Galiullina N J 
Published: November 2020

Abstract
Ensuring reliable operation of heat exchange equipment is the key to continuous and efficient operation of the entire technological unit or assembly as a whole. During installation, repair or operation, various deviations of the construction elements of the heat exchangers from the values specified by the project are possible. One of the possible scenarios of such deviations is the deviation of the transverse baffles of the tube bundle from the vertical design position during installation. Since the transverse baffles in the tube bundle play the role of supporting constructions, when they deviate from the vertical design position and at the same time are exposed to operational loads, it is possible to form zones of concentration of increased stresses in the heat transfer pipes, and then the occurrence of defects in these zones. Currently, the work on modeling heat-exchange equipment using specialized software systems for assessing the stress-deformed state taking into account the influencing factors and identifying the most unfavorable zones with maximum effective stresses is relevant. This paper investigates the interconnection between the magnitude and direction of deviation of the transverse baffles from the vertical design position on the stress-deformed state of the tube bundle of the heat exchanger with fixed tube grids along the rows of heat transfer tubes.
Diagnostics of damages in the pre-destruction zone during low-cycle loading in pipeline systems
Authors: Kulakov P A , Rubtsov A V , Afanasenko V G , Galyautdinov D D 
Published: November 2020

Abstract
The paper considers the methodology for determining the location of fatigue destruction using non-destructive testing methods, as well as the assessment of the residual resource. The metal of the main pipeline was tested to test the determination of the stress-deformed state. The main causes of the destruction of pipeline systems were investigated and the choice of non-destructive testing methods that were adequate in terms of the diagnostics of main pipelines was justified. The developed methodology for testing low-cycle fatigue of samples of main pipelines that were in operation allows us to establish regularities of change in the stress-deformed state and magnetic characteristics of the material of main pipelines at various stages of its life cycle. The iterative cyclic experimental studies carried out make it possible to determine the potential destruction zone and evaluate the effect of the number of cycles on the residual resource of the pipeline. Experimental data correlate with data obtained using a digital network-centric system.