bluuebunny/crossref_metadata_2025_split huggingface dataset:
Electronic control of the antenna array direction pattern of the vertical atmospheric probing radar station
Authors: Ratuschnyak V N , Dmitriev D D , Gladyshev A B , Tyapkin V N , Bellman S V 
Published: May 2021

Abstract
The article is considered formation and control issues of a small-element antenna array direction pattern of vertical probing radar stations for monitoring the atmosphere. The features of the vertical probing radars functioning and construction with a small-element array are presented. In the article is presented comparative analysis, which based on results of the simulation and on change nature in the direction patterns when the main beam deviates from the vertical for rectangular and annular antenna arrays.
Analysis of stream-guiding structures for the use of sediment management in river beds
Authors: Anokhin A M , Tkachev A A 
Published: May 2021

Abstract
The article analyzes the stream-guiding structures of M.V. Potapov and Odgaard, A.J. in order to use sediment management in the river bed. Odgaard, A.J. and other authors have developed the continuation of the use of artificial transverse circulation for sediment transfer within the cross-section of the channel, developed by M.V. Potapov, and created a method for calculating bottom guide sills for various application conditions. The authors have developed and tested by model and field studies typical configuration of the panel system. Convergence of the main parameters of bottom shields according to Odgaard, A.J., and M.V. Potapov argues that the way Iowa’s submerged shields are used has its merits and is a sediment control method for waterways and rivers in general.
Information and measurement systems for environmental monitoring: a regional aspect
Authors: Letyagina E 
Published: May 2021

Abstract
This article outlines the results of a study of information and measurement systems (IMS) used in monitoring the state of the environment in large urban agglomerations and their application using Krasnoyarsk Krai, Russian Federation, as an example. Additionally, it offers an analysis establishing the structure, constituent elements, as well as the effectiveness and efficiency of the use of IMS for monitoring the state of atmospheric air pollution in large urban agglomerations in the Krasnoyarsk Krai. The paper presents the results of observation and control over the state and degree of atmospheric air pollution for 2020 in the cities of Krasnoyarsk, Zelenogorsk, and Kansk. The problems that can be solved through application of automated IMS for monitoring the environmental situation in cities have been identified, specifying the challenges of using regional systems for monitoring the ecosystems of the territories of the Russian Federation. Additionally, the paper investigates the problem of the variety of automated IMS used in different regions of Russia to monitor the state of the environment in large urban agglomerations. The study identifies the prospects and features of further development of automated IMS for controlling and monitoring pollution and the state of the environment of urban agglomerations.
Problems of introducing an integrated scientific development management system
Authors: Krutov A V 
Published: May 2021

Abstract
To achieve the required quality of technology in the creation of new technology, an applied research management system is required. The purpose of the article is to identify problems and ways to solve them when introducing a complex new system in high-tech industries. The methodology includes a systematic analysis of sectoral scientific activities in strategic planning and forecasting the development of technologies and management of the creation of a reserve. The system is built on modern principles of technology development and scientific potential: programmatic and targeted approach, optimization of research in several areas and choice of one as the main research concept, assessment of the level of technical excellence, strategic and tactical planning to achieve the predicted result. An attempt is made to cover the whole range of problems of introducing an innovative system with the aim of general understanding of the strategy of its implementation, development of a methodology and program.
Population health risk assessment associated with air pollution in the area of natural chalk industrial processing complex influence
Authors: Stepkin Yu I , Prozhorina T I , Kurolap S A , Klepikov O V , Boeva A S 
Published: May 2021

Abstract
Increased air pollution in the areas where large mining complexes are located poses a risk to public health. The article examines harmful substances atmosphere emissions’ impact on the population health living near an industrial mining enterprise of the Kopanishchensky natural chalk deposit in the Ostrogozhsky district of the Voronezh region. Environmental risks calculations showed that out of 36 chemical substances that pollute the atmosphere, 5 substances have a carcinogenic effect. The maximum values of the total carcinogenic risk do not exceed the dangerous threshold, however, they need to be carefully monitored. The main contributor to the total risk is carbon soot – 99.9%. Calculations results of non-carcinogenic risks due to inhalation exposure showed that the respiratory organs which are negatively affected by 8 out of 10 priority chemicals, are most potentially affected.
Mathematical model of the effective use of reclaimed lands in the South of Russia
Authors: Apazhev A K , Shekikhachev Y A , Hazhmetov L M , Shekikhacheva L Z 
Published: May 2021

Abstract
To assess the state of reclaimed land by purpose and intensity of use, it is necessary to fully apply the following set of indicators: the quality of irrigation water; the depth of groundwater; the salinity of underground water; the degree of salinity of the soil; leaching of the soil; the degree of soil contamination with fluoride, heavy metals and other pollutants; the composition and amount of humus; the density and structural-aggregate composition of the soil; the degree of occurrence of adverse exogenous processes. The main of the indicators is the depth of ground water, which during the growing season is considered relative to the “critical” depth, i.e. the depth at which the optimal water-air regime is determined for growing crops and preventing secondary salinization of the soil. The direction and speed of soil formation processes are also determined by the quality of irrigation water, climatic and hydrogeological conditions of the region, soil topography, natural properties, irrigation techniques and technologies. On reclaimed lands, soil degradation occurs only under certain conditions. The most common degradation processes are: rising groundwater levels; activation of geochemical processes at the local, regional and global levels. Secondary soil salinization is observed on the reclaimed lands. The desalination process is determined by the quality of irrigation water, soil properties, depth and salinity of groundwater; leaching of the soil and an increase in toxic alkalinity, pH; drainage of irrigated soils is formed due to the development of erosional, alkaline and saline processes, the presence of perennial grasses and organic fertilizers in the crop rotation. With soil salinization, the qualitative composition of humus changes, agrophysical degradation of reclaimed lands, modification of mineral soil components and increased hydrophilicity during irrigation. According to the above indicators, the full range of degraded lands in the region is unknown, since it requires regular monitoring of the reclaimed lands. Taking into account the above, studies aimed at increasing the efficiency of the use of reclaimed lands in the South of Russia is an urgent problem.
Digital methods of discrete fourier transform, allowing minimizing the number of algorithmic multiplication operations
Authors: Yu Burova A , Usatenko T O 
Published: May 2021

Abstract
The issues related to the digitalization of the spectral analysis of the polyharmonic signal are considered. There are various digital methods of discrete Fourier transform (DFT) of such a signal. The purpose of the study is a comparative analysis of the known methods for transforming a complex signal, which make it possible to minimize the required number of multiplication operations in its transformation algorithms. The research used methods of mathematical and software modeling of digital signal processing algorithms. The methods of discrete Fourier transform based on multiband digital filtering (MDF) with one low-frequency digital filter and with an extended window based on the so-called bank of non-recursive digital filters (BDF) are described. There are the results of a comparative analysis of these methods.
Patterns of the reindeer (Taimyr-Evenk population) movement in dynamics during migration
Authors: Soukhovolsky V G , Savchenko A P , Kovalev A V , Savchenko P A , Muravyov A N 
Published: May 2021

Abstract
Despite the keen interest in reindeer, a number of issues in its ecology are still poorly understood. Difficulties in assessing the state of deer populations are associated with technical difficulties, the need to track individuals in the wild. In addition, most of the year they are in motion, passing from 6.5 to 9 thousand km2. To assess and predict the state of populations, information is needed not only about the number, but also about the physiological state of individuals. This work is devoted to the development of indirect methods for assessing the state of reindeer based on the indicators of the migration activity of individual individuals. The use of collars with radio transmitters makes it possible to assess in detail the peculiarities of animal movement modes using numerous indicators describing the relationship between movement speed on different days. This opens up the possibility of using data to understand the state of individuals, which, ultimately, makes it possible to assess the dynamics of the abundance and stability of wild reindeer populations in general.
Analysis of software and hardware technologies of information-measuring systems for environmental monitoring
Authors: Kovalev I V , Testoyedov N A , Kovalev D I , Losev V V , Tynchenko Ya A , Golovenkin E N , Maksimov I A 
Published: May 2021

Abstract
The article presents an analysis of software and hardware technologies for information and measurement systems for environmental monitoring. The processes taking place in power plants of thermal power plants have different requirements for permissible emissions, which are measured using different criteria. Measuring and recording instrument data is an important part of a monitoring system. The analysis takes into account various monitoring technologies provided with a variety of tools, including up-to-date hardware and software systems. It is shown that the software and hardware technologies of monitoring systems should be implemented using real-time system software, have both hardware and software redundancy, as well as high security and increased MTBF.
Modeling the distribution line form of surface electromagnetic wave and calculating the transmission coefficient of a symmetric strip line
Authors: Gladkikh O B , Vasilyeva I I 
Published: May 2021

Abstract
The work is devoted to the analysis of the dependence of the dielectric properties of highly conducting anisotropic materials from the magnitude and the direction of the magnetic field. A nonlinear model of propagation of a surface electromagnetic wave in a planar bismuth waveguide located in a quantizing magnetic field is considered. As a result of the simulation of the shape of the magneto-optical experiment line, a software package in the JavaScript language for calculating the dielectric constant and the bismuth conductivity tensor for each direction (binary, bisector and trigonal) is presented.
Standardization and metrology in the period of digitalization of the economy
Authors: Okrepilov V V , Gridasov A G , Chudinovskikh I V 
Published: May 2021

Abstract
The article is devoted to the new challenges facing standardization and metrology in the digital economy. The need to improve the practice of developing standards, more active involvement of business in this process is emphasized. Attention is drawn to the preservation of the best achievements of Russian metrology, its leading positions in the world in the context of digitalization.
Standardization of sustainable urban development measurements
Authors: Ivanova G N 
Published: May 2021

Abstract
The article deals with the achievements of sustainable urban development by improving the quality of management based on the application of standards. The necessity of solving this issue is justified, as well as the relevance of the standards’ application, including at the stage of data collection and processing, in particular, dedicated to “smart” cities. In addition, methods for assessing the effectiveness of the management itself are proposed.
Features of implementation of the method for fusion different images by location equipment of on-board systems
Authors: Nenashev S A , Grigoriev E K 
Published: May 2021

Abstract
The paper highlights the features of the implementation of on-board systems for monitoring the earth’s surface, based on small aircraft. The problems of fusion of location information from on-board monitoring systems of various types of functioning are considered. The motivation of integrating optical and radar images of the earth’s surface is shown. The result of the work is the synthesis of optical and radar images of the earth’s surface into a single information field.
Toolkit for determining the costs of developing new measuring tools and optimizing their production plan
Authors: Batkovskiy A M , Fomina A V , Semenova E G 
Published: May 2021

Abstract
The tools for determining the forecast value of the costs associated with creating new measuring tools that have standardized metrological characteristics are proposed. It is adapted to the cost estimation procedures carried out to develop a plan for their production in both monopolistic and competitive markets. Existing models for optimizing these procedures cannot always be applied since, due to the considerable complexity of the simulated process, they are often illustrative in nature. Some procedures are not formalized and do not consider the required extent of their application’s specifics on a competitive basis. Therefore, when predicting costs in creating new measuring tools, it is sometimes necessary to use analogies and expert evaluations. This circumstance reduces the validity of forecast estimates. In contrast to existing methods of solving the problem under consideration, the proposed toolkit allows solving it systematically and based on formalized procedures. The article presents a model statement of this problem’s solution using a system of criteria and indicators for the quantitative assessment of the processes under consideration. The proposed toolkit is based on the methodology of structural synthesis of cost forecasting procedures. The use of the proposed toolkit will increase the validity of the forecast values of the costs associated with the creation of measuring tools. This will ensure the optimality growth of production plans for new measuring tools used in metrology. One of the possible solutions to this problem is presented in the article.
Methods of coordinating fuzzy expert evaluations in the design of metrological support means
Authors: Batkovskiy A M , Sudakov V A , Fomina A V , Balashov V M 
Published: May 2021

Abstract
The article explores methods of coordinating expert judgments in the design of technical measuring instruments. A methodology for analyzing fuzzy matrices of pairwise comparisons of the effectiveness of preliminary designs of metrological support means is proposed. It includes defuzzification of pairwise comparison matrices; finding a median pairwise comparison matrix; determining fuzzy mean values for each element, and forming fuzzy weights for the compared means by individual levels of the membership function values. The procedure for finding the final membership function of metrological support tools is formalized to minimize the deviations of the fuzzy paired comparison matrices of expert opinions from the final matrix of these comparisons. Methods for optimizing the final ranking of alternative projects based on fuzzy group evaluations were investigated and developed. A fuzzy modification of the Condorcet principle is developed for the case of fuzzy dominance of alternatives. These methods of expert evaluations serve the purpose of increasing the efficiency of development and creation of metrological support means.
Improvement of mechanical behavior of neoprene rubber by means of glass fiber
Authors: Antypas I R 
Published: May 2021

Abstract
Materials of the present article are concerned with research related to creation of new composites and studying their properties. In the course of the study, a polymer-based composite was created using neoprene; it was reinforced with multiderectional glass fiber, and polar solvent based on ethyl acetate and carbon tetrachloride was chosen as the most suitable solvent. Moreover, influence of fiber orientation on mechanical behavior of composites depending on the solvent type and amount was studied too.
Construction of a mathematical model of a by-pass turbojet engine as part of a complex aircraft model of an on-board navigation system
Authors: Markelov V V , Kostishin M O , Zharinov I O , Zharinov O O 
Published: May 2021

Abstract
One of the main trends in the development of modern on-board navigation systems is aimed at increasing the predictability of the aircraft’s flight path in space and time. That in its turn should improve the accuracy of evaluation of fuel and operating costs, improving the quality dispatch services and bandwidth airspace. At the same time, the predictability of the trajectory can be an additional factor in ensuring the safety of flight operations. The current level of development of on-board computing systems allows to use the most effective method of forecasting - complex mathematical flight models for solving the problem of predicting a four-dimensional flight path and evaluating fuel costs. At the same time, a feature of the flight models implemented in on-board systems remains the orientation to minimize the computing resources used while ensuring the required accuracy of the estimation of the predicted parameters. One of the components of a complex mathematical model of flight is the engine model, which allows determining the fuel costs and energy capabilities of the aircraft. As one of the options for implementing the engine model as part of a complex mathematical model of the flight of an onboard navigation system, a mathematical description of the functioning model of a two-circuit turbojet engine is presented. For improving the accuracy of the parameter estimation, the model is built on the basis of thermogasdynamic calculation using a limited amount of initial data provided by the engine developer. The presented model of a by-pass turbojet engine provides the calculation of the main parameters of the engine operation, including fuel consumption and available thrust, at the specified values of the required thrust. And also, accordingly, determines the permissible operating modes of the engine when simulating operation as part of an aircraft. The results of the proposed model development are presented.
Modeling of effects of technical errors on static and dynamic behavior of helical gear transmission
Authors: Dyachenko A G 
Published: May 2021

Abstract
Materials of the present article are concerned with research related to identification of defects in a helical gearwheel of crossed helical gear pair, occurring as a result of certain operating modes and overloads, on such processes in a gearwheel as fatigue and wear of teeth. In the course of the research, using a modern computer program, a dynamic model of a helical gearwheel was developed, which made it possible to identify the degree of effect of engineering technical errors of mounting and operation on conditions of its operation.
Theoretical analysis of cotton movement in cleaning equipment
Authors: Parpiev Azim , Sharakhmedova Mamura , Ergashov Mukhammadrasul 
Published: May 2021

Abstract
The article explores the supply of cotton in the cleaning of cotton from fine impurities, the laws of movement under the influence of the pile cylinder, the possibility of increasing the level of friction. The main conditions of the movement of cotton in continuous components, the shortcomings of the influencing factors are analyzed. Using the experience of foreign countries, a cotton transfer option was proposed, which allows for additional grinding and disassembly in pile cylinders. The focus of the work was to determine at what angle the cylinder pegs would strike them so that the cotton pieces could move along the required trajectory. Experiments were carried out using the obtained solutions and the developed algorithm, the results of which were analyzed and appropriate conclusions were developed. During the experiments, taking into account the geometric dimensions of the cotton pieces, the effect of their values on the movement parameters was determined. The obtained results allow to determine the coordinates of the mutual position of the pile cylinders with the supply rollers.
Quality improvement and evaluation of stress-strain state of cylindrical shells during drawing with local wall thinning
Authors: Zhernosek V N , Yurkov I V , Podtyagin V E , Nikishkin A E 
Published: May 2021

Abstract
One of the urgent tasks in the manufacture of cylindrical shells is to improve their performance and quality by developing technological processes based on new methods of metal treatment by pressure, for example, on drawing. A distinctive feature of drawing with thinning was the use of dies with a periodically changing profile of the bearing. The use of such dies creates additional shear strain during the forming, which affects the structure of the material and the performance of the product. This article presents the results of simulating the drawing with wall thickness reduction in QForm 7 and analyzes the effect of die geometry on technological force and stress-strain state.
Formation of deep-drawing in an open-die by pulsed-magnetic field pressure
Authors: Kurlaev N V , Matveev K A , Ahmed Soliman M E , Ryngach N A 
Published: May 2021

Abstract
The deep-drawing process is considered one of the most important metal processing processes, which is used to form sheet metal of bowl-shaped structures in the field of mechanical engineering, aviation and rocket engineering under tension and compression without changing the sheet thickness. The present work is to evaluate the formability of an aluminum alloy sheet using an open-die in deep drawing process, an attractive manufacturing technique using electromagnetic force (Lorentz) to form metal parts. This work investigates the history of deformation (displacement, deformation, strain rate) in the process of electromagnetic deep drawing in an open-die using a numerical model. The research methods are the finite element method (FEM) associated with the boundary element method (BEM) using LS-DYNA software for the analysis of electromagnetic, mechanical and thermal solvers. Results analysis of the deformable solid thickness in the process of deformation showed that the thickness increased in the marginal zone and reached 1.77 mm. Further, the thickness in the middle zone decreased by 0.23 mm and decreased by 0.35 mm in the central zone. The plastic deformation of the workpiece gradually increased from zero to 26% for the middle zone, 31% for the marginal zone and 46% for the central zone.