bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the angles of contact in a two-roll module
Authors: Khalturayev F S , Musirov M U 
Published: May 2021

Abstract
The study is devoted to the analysis of the angles of contact in a two-roll module. An asymmetric two-roll module is considered, in which the rolls are inclined to the right relative to the vertical line, they have unequal diameters and elastic coatings made of materials of different stiffness and friction coefficients; the material layer is fed down inclined relative to the centerline. Analytical expressions for the angles of contact are obtained, which are the main quantities that determine the boundary conditions for the problems of contact interaction in a two-roll module. It was stated that the sum of the contact angles does not depend on the inclination of the material layer feeding to the centerline and on the inclination of the upper roll relative to the vertical line.
Analysis of forced gripping of material in a two-roll module
Authors: Kurbanova F Z , Buriyev E S , Rasulev A 
Published: May 2021

Abstract
The process of gripping material with two driven rollers in an asymmetric two-roll module is analyzed in the article. Analytical expressions for the minimum and maximum pushing force to grip material with two driven rollers in an asymmetric two-roll module were determined. Analytical expressions were obtained for calculating the contact angles of the free and forced grip of material with two driven rollers, which are the basic quantities that determine the boundary conditions of the contact interaction problems. A condition for forced gripping in an asymmetric two-roll module was found. From this condition, the conditions for forced gripping of the process of symmetric rolling were obtained.
Intelligent control support for reconstruction of electrical circuits of stations and substations
Authors: Kovalenko I V , Tremyasov V A , Belov V G 
Published: May 2021

Abstract
The article deals with the application of expert systems and the theory of fuzzy sets for decision-making in the reconstruction of electrical connections of power plants and substations. Multicriteria optimization problems are characterized by the uncertainty of a part of the initial information with the boundaries of the range of values from the minimum to the maximum. This theory allows us to compare the options of scheme of power distribution power plants according to different criteria in the conditions of uncertain information, as well as in the conditions of conflicting rules and criteria. For fuzzy sets, the membership function becomes the only possible means of describing them.
Improvement of the method of geometric design of gear segments of a planetary rotary hydraulic machine
Authors: Yu Volkov G , Fadyushin D V 
Published: May 2021

Abstract
Until now, planetary rotary hydraulic machines with floating planetary gears were rarely produced and remained poorly studied. One of the main problems was the lack of a simple and affordable method for geometric design of non-circular gear rims of such machines. The article discusses an engineering method for profiling non-circular gear rims of volumetric planetary rotary hydraulic machines. The proposed method begins with the choice of the geometric parameters of the round-link planetary mechanism - the prototype of the designed hydraulic machine. Next, the number of waves of the sun gears and the form of the cyclic function characterizing the paths of the planetary gear center in the coordinates associated with the sun gear and the epicycle are selected. The preliminary calculation of the angle of rotation of the planetary gear and the polar coordinates of its center on the path relative to the given sun gear in the variety of the planetary gear positions is performed at the next stage. In this case, the positions of the planetary gear relative to the one of the sun gears correspond to its rolling along the calculated centroid of this gear at a constant angular velocity of the imaginary carrier. Next, the difference between the obtained angles of rotation of the planetary gear is calculated in the coordinates associated with the imaginary carrier. This difference is halved and distributed as a correction between the rotation angles of the planetary gear relative to the sun gear and the epicycle. In conclusion, the profile of the rim of each non-circular sun gear is obtained graphically as an envelope of the family of profile curves of the planetary gear in a variety of its positions. The proposed method provides an accurate solution to the problem and is available for the designers of any machine-building enterprise.
The human-cobot collaboration in mounting and assembly operations in instrument making
Authors: Shchenikov Ya A , Gromova O S , Smeshchuk E A 
Published: May 2021

Abstract
The issues of collaboration between humans and cobots during assembly operations in instrument making from the point of view of metrological support are considered. The possibility of using specialized cobots in instrument making is shown. A study is described, which purpose is to develop a system that recognizes the actions of a human operator in order to increase the efficiency of collaboration between a human and a cobot when performing standard mounting and assembly operations. The system is based on an accelerometer attached to the operator’s hand. The signals from the accelerometer for different operator movements are given. The principle of constructing a training sample for recognizing operator movements using an artificial neural network is shown.
Investigation of the effectiveness of the method of finishing the inner cylindrical surfaces of machine parts with a free abrasive using the effect of vibration cavitation
Authors: Averin N V , Posalina A E , Atamanov S A , Bondarenko A P , Ivanaiskiy A V 
Published: May 2021

Abstract
Finishing of high-precision machine parts is one of the most labor-intensive operations in the technological process. This process becomes especially difficult when it is necessary to ensure a high-quality surface in hard-to-reach places for parts made of materials with special physical and mechanical properties. In such cases, the solution to the problem may be the use of methods of processing with free abrasive particles. Based on the foregoing, it can be concluded that improving the efficiency of methods for processing parts with a free abrasive is the most important task for researchers in the field of mechanical engineering technology.
The authors of the article carried out a series of experiments on finishing the inner cylindrical surfaces of machine parts of the “sleeve” type with a free abrasive using the effect of vibration cavitation. The study is of an applied nature - according to the design documentation for the product, it is necessary to achieve a roughness in the inner surface of Ra 0.80.
Classification of indicators of reliability of systems in heavy engineering
Authors: Golikov V A 
Published: May 2021

Abstract
A feature of this work is the study of the design reliability assessment based on analytical data, with further classification of its indicators. Like any other properties of technical devices, reliability is assessed by a certain set of indicators. The paper provides an overview of domestic and foreign sources on this topic. The main tasks associated directly or indirectly with the problem of reliability are identified, the solution of which is necessary to create designs of technical devices with an optimal level of reliability indicators. It was also found that the reliability indicators, depending on the specific conditions of their use, can be classified according to various criteria. The results of the work show the most significant factors of reliability, which can be quantitatively determined directly using the method of expert assessments.
Models of fuzzy logic in the processes of verification of the required level of automation of technological processes research and production complexes
Authors: Nazarevich S A , Vinnichenko A V 
Published: May 2021

Abstract
Improving the methodological apparatus for monitoring and analyzing the potential of technological processes of industrial enterprises, based on the identification of the level of maturity of processes, is the primary task of achieving a competitive state. The article describes ways to verify the processes of the main activities of the organization, using fuzzy logic models and criteria for achieving the required level of automation.
Management of processes of space debris capture and processing into fuel
Authors: Barkova M E , Kuznetsova V O , Zhukov A O , Kartsan I N 
Published: May 2021

Abstract
The processes of space debris capture and processing into fuel are considered. The mentioned processes have a number of limitations on the choice of materials to be recycled (space debris) and on the creation of spacecraft for space debris utilization (hereinafter - space debris collector). Management of space debris capture and utilization processes is inseparably connected with pseudo-liquid fuel, received by the collector from space debris. Pseudo-liquid fuel is finely dispersed garbage in the environment of hydrogen (fuel) and oxygen (oxidizer). To control the processes of space debris capture and utilization into fuel it is necessary to determine the choice of materials of the spacecraft capture device and manufacturing of internal systems. Efficiency of space debris capturing and utilization into fuel management will be provided by fulfilling a number of fundamental requirements in addition to those of the work: orbital altitude of space debris collector is conditioned by space debris location in space (orbit altitude, inclination); space debris is captured only from certain materials and alloys (metallized space debris); space debris is captured by the network at the intersection of the target orbit at small angles; material and structure of the tether is selected based on maximum tension and absence of breaks.
Control of the formation of structural properties of hypereutectic aluminum alloys during injection molding with crystallization
Authors: Denisov M S 
Published: May 2021

Abstract
The paper presents the results of the research aimed at developing an automated control system for the process of forming the properties of metal products under the conditions of pressure application on the crystallizing metal. The results of the work are related to the automated control system for technological processes (ACS TP) and can be used in the manufacture of internal combustion engine pistons from alloys based on aluminum with a high silicon content. The object of control is molten metal, the technological equipment is a hydraulic horizontal press for casting with crystallization under pressure. The paper shows the possibility of controlling the formation of the properties of the final product. The results of the work are confirmed by the example of studies of the microstructures of the obtained samples. The method for applying pressure to a crystallizing metal and the way to control this method are proposed.
Alternative non-destructive method for strength testing of structural concrete
Authors: Elemba Modests , Lapsa Videvuds-Arijs , Šahmenko Genadijs , Korjakins Aleksandrs 
Published: May 2021

Abstract
This work proposes an original and active method for non-destructive testing of concrete and can also be used for other building materials. The proposed method includes the successive steps of: drilling holes into samples of building material with use of rotation or percussion drilling machine and simultaneously determining the power consumption necessary for drilling; strength determination of building material by destructive failure of samples; obtaining a positive empiric correlation between the power consumption necessary for drilling and determined strength values of material; control during drilling the holes in structure material being tested and simultaneously determining the power consumption necessary for drilling; determining the actual strength of structure material being tested by use of correlation between power consumption and material strength values derived in testing process. The application of the method makes strength determination of building materials simpler and faster and also increases the accuracy of testing.
Metrology of biotechnical systems
Authors: Chindjeria A B , Poyasov I Z , Tikhonenkova O V , Sergeev T V , Danilova A S 
Published: May 2021

Abstract
The history of creation and features of functioning of biotechnical systems, types of feedbacks and their role in the work of complex systems are considered in the article. The idea of biofeed-back, the prospects of its application and the difference from the traditionally used one in the technique of feedbacks are given. Due to the increasing requirements for measurement accuracy, the special role of Metrology in the development and operation of biotechnical systems is emphasize. Traditionally used sections of Metrology are specified: theoretical, legislative and applied. In relation to living objects, Metrology is considered as a special discipline-biometrology. The article proposes to consider the information in the BTS as a subjective perception relating to the subject of perception, which is a human operator. It is proved that it is the cognitive functions of the human operator that give information subjective properties. The thesis about the possibility of using the concept of “image” as a biometrological concept denoting a unit of information in bio-technical systems is put forward.
Telemedicine technologies as one of the promising intellectual areas of medicine in the pandemic conditions
Authors: Popova S V , Zolkin A L , Munister V D , Yumashev A V , Yu Bogaevskaya O 
Published: May 2021

Abstract
The article discusses the functional, fundamental and role-based component of the organization of telemetry instruments in medical support of remote settlements in pandemic conditions. The importance of adherence to technical and technological features in the design of an intelligent environmentwhich provides the telemedicine sector of the provided services is substantiated. The model of anonymized telemetry of medical research is indicated. An adaptive model for deploying of an information portal for a medical office is proposed. Much attention is paid to compliance with responsive design. A method for solving this problem is demonstrated.
Modeling and forecasting the dynamics of wastewater contaminant pollution by manganese (II) ions
Authors: Kh Kurbangaleeva M , Islamutdinova A A 
Published: May 2021

Abstract
Modeling and forecasting of the dynamics of wastewater contaminant pollution by manganese (II) ions is carried out. The informational basis of the technique is statistical indicators of changing in the chemical composition of raw materials and change in the mass concentration of manganese (II) ions in river water used for washing the process gas obtained by calcining limestone. The purpose of the modeling is to detect the relationship between the independent values (change in the compounds of bivalent manganese in limestones as well as change in the mass concentration of manganese (II) ions in river water) and the dependent factor (change in the volume of wastewater contaminant pollution by manganese (II) ions. For modeling, it is proposed to use the mathematical apparatus of correlation and regression analysis, in particular multiple regression. According to calculations, there is a relationship between the change in the volume of environmental pollution and the parameters of the model, that is between the change in the amount of bivalent manganese compounds in the raw material and the change in the content of manganese (II) ions in river water.
The Industry 4.0 net information, measuring and control subsystems
Authors: Shukalov A V , Zharinov I O , Zharinov O O 
Published: May 2021

Abstract
The net information subsystems are for measuring processes application, universal and special cyber-physical production control processes through the calculation and link. The subsystems consist of calculation, technological and telecommunication devices united into open system architecture. The schemes are given of information, measuring and control subsystems, which coordination effort mechanisms are selectively to process a distributed information received through nets of electro and radio connection with a necessary passing through ability. The subsystem structure contains physical and virtual components, which include calculation, electronic and electromechanical elements united with general principles how to construct a communication nets for cyber-physical systems reception and transmission. The main attention is paid to the general data exchange processes as for measurements and control engaging the information vast data processing, which are formed in cyber-physical systems registered in different company local nets.
Total quality control of the cyber-physical production using machine vision technologies
Authors: Gurjanov A V , Babenkov V I , Shukalov A V , Zharinov I O , Zharinov O O 
Published: May 2021

Abstract
The total control is made for each separate unit of the item being manufactured to prevent any scrap. The automatic control tools are a part of information, measurement and controlling sub-systems, which use the machine vision technology. The information sub-system is done with the cyber-physical production calculation potency. The measurement sub-system is a set of digital cameras (optical detectors) and the artificial illumination semiconductor sources. The controlling sub-system regulates the item position with turning mechanisms inside the closed cyber-physical system technological chamber. A set of sub-systems performs a non-destructible item quality control with the item surface photographic images and stereo-maps program analysis, which should not contain non-homogeneous sections like scars, fissures, inclusions and other and any deviations of geometrical dimensions. The calculator three-dimension item image is formed with reconstruction algorithms of two-dimension photographs received in different views and illumination conditions and the means of laser scanning. The item surface quality requirements in the enlightened areas and obscured ones are defined with rendering equation, which are permitted for the item digital twin with calculator numerous methods. The quality control requires to compare with the reference energy and color measurement item surface characteristics, which are defined with mathematical calculations and optical measurement means. There is a scheme given of information, measurement and controlling cyber-physical system channels, which engage the machine vision technologies to control the item quality.
Enhancement of metrological support in measuring the composition and concentrations of pollutants in wear products of automobile tires
Authors: Tretyak L N , Volnov A S , Kosykh D A 
Published: May 2021

Abstract
The article shows that the high environmental hazard of tires is caused not so much by the mass of pollutants of dispersed particles, but by the toxic properties of the materials used in their manufacture and the impurities contained in them. It is emphasized that when assessing the quality of automobile tires, there are no reliable indicators and methods that allow determining the level of their environmental hazard. The necessity of changing the regulatory requirements for assessing the quality of automobile tires by expanding the list of their environmental indicators, developing methods for controlling tire emissions, both at the production stages and during operation, is justified. A list of pollutants subject to regulation in the assessment of the environmental safety of automobile tires and methods of their measurement are proposed. The main pollutants subject to regulation and control are: benz(α)pyrene and other polycyclic aromatic hydrocarbons, as well as aromatic hydrocarbons and N-nitrosamines. The results of quantitative assessment of the composition and concentrations of harmful substances in the wear products of automobile tires are presented. The authors substantiate the level of rationing and methods that can be used in assessing the environmental hazard of automobile tires, both in the production process and in the conditions of their operation. It is proposed to use the principles of dose assessment of the toxicity of the total aerogenically absorbed dose of pollutants emitted in the wear products of automobile tires.
On the possible causal relationship of the COVID-19 viral disease with electromagnetic pollution of the environment and the main directions of its weakening
Authors: Darovskikh S N , Shonazarov P M , Sodik F , Kholov F T , Umaralizoda R , Juraeva R 
Published: May 2021

Abstract
The purpose of the study is a systematic analysis of the processes associated with the emergence of the COVID-19 viral disease, it was concluded that the most likely reason for its appearance and spread throughout the world is the global impact of wireless local area networks Wi-Fi on the Earth’s biosphere. Recommendations are formulated for weakening their negative impact on the human body. The necessity of using in the treatment of human diseases of viral and (or) inflammatory etiology of radiophysical technology based on modeling the microwave radiation of the Sun is substantiated. This makes it possible to activate inhibited enzyme complexes for the restoration of the free energy potential in cellular structures under hypoxic conditions, which is necessary for the synthesis of biostructures not only for antiviral, but also for antibacterial protection, regardless of the virus strain or one or another pathogenic microorganism. The proofs of the expediency of using the developed hardware and software tools for modeling the solar microwave radiation to provide antiviral protection are presented. Their main focus is related to the control of the radiation of these networks in various places of their use, the formation of new regulatory requirements for the used operating frequency range and the development of scientifically based recommendations for ensuring the safety of their use.
Measuring systems for monitoring the human state: human digital twins based on a kinematic portrait
Authors: Alekseyev V V , Vizgirda A S , Nefedyev D I , Tsareva A V 
Published: May 2021

Abstract
The report is concerned with the analysis of the functional and physical structures of human characteristics for the formation of reference digital models and individual portraits of a human which are his digital twins. A database structure has been developed for describing the human state, based on a variety of models, measured physical quantities, and results obtained from a mobile information and measurement system. The paper outlines an approach to the study and design of mobile information and measurement system designed for the construction of individual kinematic portraits of a human. A variant of a part of the inference system is shown on the example of studying the trend of changes in one of the time characteristics of the movement technique.
Comparing the test power for the normal distribution of the direct multiple measurements
Authors: Borbats N M , Shkolina T V 
Published: May 2021

Abstract
An experimental study of the test power (Shapiro-Wilk W-test, Geary test and composite test) was carried out. The test power was used to check the normal distribution of a relatively small number of the multiple measurements. The study results confirm the high power of the W-test for detecting the deviation of the probability distribution from the normal law for a wide range of alternative distributions. A slightly better sensitivity of the Geary test for alternative distributions close to normal was also established. The results obtained can be used to justify the inclusion of the Shapiro-Wilk test in the next edition of the corresponding national standard.