bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigation of the mechanisms of the electromagnetic wave effect on the diffusion flame torch
Authors: Stolyarov D V , Koroleva T I , Shaposhnik D S , Ivachev M A , Mikhailov K A
Published: May 2021

New socio-economic conditions for the development of Russia dictate new requirements for the protection of buildings, equipment and personnel of various facilities from fires and their consequences. In complex fire extinguishing systems, the timeliness of fire detection and the effectiveness of extinguishing is the key to preserving material values and human lives. An urgent task is not only the improvement of existing fire extinguishing systems, but also the development of new systems, the basis of which is based on previously unused approaches. These approaches are based both on the previously known physical and chemical methods of extinguishing fires, and on the methods being investigated and studied at present. One of the promising methods of extinguishing fires is the technology of extinguishing fires using the effect of an electromagnetic field on the diffusion flame. The study of this method involves the analysis of physical processes that are electromagnetic in nature of interaction occurring in the system “diffusion flame torch - electromagnetic wave”. In this work, a quantitative analysis of the parameters affecting the possible mechanisms of interaction of the elements of this system is carried out. A mathematical model of the considered physical processes is presented.
Determination of the true density of chaga by gas picnometry in atmospheric air
Authors: Gainullin Renat H , Safina A V , Gainullin Rishat H , Mukhametzyanov S R
Published: May 2021

The considerable interest in the study of chaga (Inonotus obliquus) as an extraction material is due to the unique chemical composition and a wide range of biologically active substances used in various industries. An important parameter reflecting the content of chaga substances in the volume is the true density or the cell wall density not given in the literature. The porous structure of the fungus and the irregular geometric shape of chaga determined the choice of gas pycnometry as a method to measure the true volume and the subsequent determination of chaga cell walls density. After critical analysis, an alternative, theoretically substantiated method for determining the true volume of a porous body in atmospheric air was proposed. The experimental data results were processed to determine the true density of chaga cell walls, which ranges from 1.411g/cm 3 to 1.588g/cm3. The maximum density was in the central part of the fungus. To the periphery of the fungus, there is a decrease in the cell wall density and the lowest density is at the point where the birch fungus adjoins the tree trunk.
Improvement of antifriction properties of tribotechnical cermets by treatment in selenium vapor
Authors: Roshchin M N , Alisin V V
Published: May 2021

The issues of the high-temperature tribological tests of cermets during friction against steel 40X13 in the temperature range from + 600°C to +700°C in atmospheric conditions are studied in the article. The choice of temperature and test atmosphere is due to the prospects of creating friction units for operation without lubrication in extreme operation conditions. Studies have shown that when processing cermet in selenium vapor, the friction coefficient in the temperature range of 600 … 700°C is approximately 8-15% lower at a load of 1.0 MPa than the friction coefficient of untreated samples. It was found that the iron chalcogenide at a temperature of 500°C and above releases Se vapors, which are adsorbed at the tribological contact and create a lubricating layer.
Generation of test method boundaries for refrigeration technology
Authors: Sokolov Ya A , Kovalenko A N , Kolesnikova P V , Korchikov D A , Burleva S A , Boyko D A , Sokolova A A
Published: May 2021

When manufacturing refrigeration appliances, it makes sense to minimize the number of defective products. This can be achieved in several ways. Since the causes of marriage are great, only those that are determined by a person and are not unambiguous should be considered. One of the possible reasons for its decrease is the accurate determination of the numerical values of the parameters of a suitable refrigerator. A deviation from the values obtained in this way will form a suitability range for each temperature. The task is facilitated by the presence of two numerical parameters for suitability: temperature and power. Consequently, if the power is at the level of the working standard refrigerator, and the temperature gained over a certain time is higher than it should be, then the refrigerator can be unambiguously recognized as defective. This article discusses the possibility of an automated calculation of the boundaries of the parameters of the acceptance test methods (ATM). They are carried out before the release of the finished product to the consumer. The calculation is based on real production statistics. The test data forms parameterized point clouds for power and temperature. Classifying points in the cloud will make the boundary calculations more accurate. This will lead to a decrease in the human factor when deciding on suitability. Consequently, the accuracy of determining the defective product will increase.
On improving the efficiency of flooding to increase oil recovery during oil fields development
Authors: Gilyazov A A , Salimov A O , Vadulina N V
Published: May 2021

The article provides an overview of existing hydrodynamic methods of increasing oil recovery, in particular, methods of flooding and oil and gas impact on the formation. Advantages and disadvantages of currently applied methods of water-gas impact on the formation in order to increase oil recovery are considered. The authors conclude that the most effective technology is the technology of joint injection of water and gas into oil-bearing formations to increase their oil recovery when acting on an injection well in non-uniform formations. One method of restoring injection capacity of the injection well and controlling filtration-capacitance characteristics of the bottomhole zone of the well is ultrasonic action. Based on a review of the methods, the most effective technologies for increasing oil recovery of the formation were selected and an acoustic emitter was developed. The radiator developed by the authors is characterized by simplicity of design and use. Dynamics of changes in injectivity indices of injection wells before and after application of acoustic emitter developed by authors is analyzed. Studies have shown an increase in injection well capacity and the efficiency of application of this device due to the fact that a homogeneous water-gas mixture is created directly in the bottomhole zone of the injection well.
Flexural strength of fiber reinforced concrete structures
Authors: Nikolenko S D , Sazonova S A , Asminin V F , Zyazina T V , Mozgovoj N V
Published: May 2021

The paper presents an analysis of dispersed reinforcement methods. Metal fibres have been used when conducting the experiment. It has been shown that the reinforcement of concrete with metal fibers can significantly increase crack resistance for structures made of fiber-reinforced concrete in comparison with similar reinforced concrete structures.It should be noted that blocking crack development and blocking the possibility of the main cracks formation is achieved in structures made of fiber-reinforced concrete due to a more uniform distribution of forces arising in concrete. The results of an experiment on the reaction of beams with dispersed reinforcement to a bending load have been presented. The calculation of stretched and bending element with dispersed and combined reinforcement has been performed. The calculation showed that the use of combined reinforcement in structures can increase their overall bearing capacity. The comparison of the calculation and experiment results has shown a showed good convergence.
Calculation of the optimal diameter of the air intake of the propulsion system for small spacecraft
Authors: Sadretdinova Elnara , Tikhonov Vyacheslav , Slabodenyuk Ilya , Podolskiy Aleksandr
Published: May 2021

The article presents the calculation of the optimal diameter of the mesh channel of the air intake of the propulsion system of a small spacecraft, which operates on outboard air. Graphs of the dependence of the efficiency of the air intake on its diameter, the dependence of the mass flow rate of particles m on the diameter of the air intake are obtained. The analysis of the environmental friendliness of creating a propulsion system by the EIO method is carried out. The assessment of the harmfulness effect of the device on the environment during its operation was carried out.
Normalization of data for training and analysis by the MaskRCNN model using the k-means method for a smart refrigerator’s computer vision
Authors: Dorrer M G , Alekhina A E
Published: May 2021

The authors propose to use the k-means method for semantic image segmentation in the artificial vision of a smart refrigerator. The authors have developed a new two-tier architecture for the semantic segmentation system. In the proposed architecture, various sets of image contrast optimization settings are used to classify pixels belonging to fragments of the studied image. Experiments have shown that the proposed method has decisive advantages over existing works. The k-means method was used to cluster pixels directly into semantic groups. The clustered data is used to solve the semantic segmentation problem. For the correct selection of the number of centroids of the k-means method, the mean shift method was used. Extensive experiments with the traditional k-means algorithm and mean shift method have shown the advantage of the proposed approach in accuracy and performance.
Technique for optimizing the technological process of manufacturing electrical radio products in the context of digital transformation of production
Authors: Petrushevskaya A A , Aleshkin N A
Published: May 2021

The article discusses the process of optimization of production processes for the manufacture of electronic products in the context of the implementation of the concept of digital transformation of industrial enterprises. One of the elements of digitalization used to improve the effectiveness of electronics manufacturing technology in industry is Design for Manufacturing (DFM) in the MatLab computer mathematics environment. The technological production cycle is illustrated in the form of a graph diagram using the apparatus of Markov chains. The application of the developed methodology, as well as the use of graph theory in the technological process of a modern industrial enterprise, allows achieving the required performance indicators, due to the optimal reflection and fixation in the database of non-stationary influences that cause deviations, which are leveled due to adaptive control actions.
Research of the methodology of the development of the demo exam in Russia and its aspects in the competence Digital metrology
Authors: Epifancev K , Suslin A
Published: May 2021

Nowadays, the demo exam is becoming a frequently used way to additionally test the knowledge of students in technical schools and colleges. However, due to the difficult epidemiological situation, this process is carried out remotely. Let’s consider the features of the demo exam in this format. The demo exam changes the perception of learning, because the traditional final qualifying work becomes only a small part of the main exam. On the frontier of successful completion of education, there is the ability to work with measuring equipment, the skills of perceiving production tasks and the possibility of solving them in the shortest possible time. It is important to note in this case the complexity of the transition to this type of exam for many students who are accustomed to perceiving the defense of their graduation work as a formal process associated with retelling a pre-written text. The demo exam is a bridge between theory and practice, which must be introduced gradually into the education system in order to eliminate a negative effect.
Control the quality of polymers based on the model of Dzeno
Authors: Chabanenko A V , Kurlov V V
Published: May 2021

Numerical methods for solving mathematical problems describing the state of complex physical systems in modern digital production can be used to assess the quality and viability of materials used in additive manufacturing. In this article, the Dzeno model is chosen, as the physical behavior of the body under dynamic load and the gradual attenuation of the load.
Experience in the use of lean-technologies in organizing a competition at a research institute
Authors: Eropkin A M , Mezina N A
Published: May 2021

The experience of using lean manufacturing tools in organizing of preparations for the participation of the young scientists of research institute in competitions is considered. There are typical features of such competitions and their significance for the development of the young scientists. Particular attention is paid to the most prestigious competitions organized by the Russian Foundation for Basic Research (RFBR). The composition of the processes affecting the efficiency of work created at the research institute and the unit for working with the young scientists is determined. One of the most labor-intensive processes, the process of preparing tender documentation, is described. By analyzing the process under consideration, the losses that occur in it are identified and analyzed. It was established that the main losses are not in the substantial work on the preparation of tender documentation, but in passing it through a significant number of instances within the research institute. The process consists of approximately 50 works and takes at least 25-30 days. A number of steps are proposed aimed at reducing such losses, using the Kanban signal system and 5S system. In particular, a special electronic folder with a navigator has been created, containing all the necessary document templates.
Forecast of solid waste generation in Atyrau region
Authors: Yessenamanova M S , Salykhov R , Tlepbergenova A E , Yessenamanova Zh S , Tauova N R
Published: May 2021

The article calculates the formation of solid household waste in the city of Atyrau and 7 districts of Atyrau region. The calculation was carried out taking into account the number of people in the previous four years, based on the characteristics of the average population growth. According to calculations for the next 5 years (2020-2024), the amount of waste in Atyrau will increase every year, which is associated with an increase in the population. Among the districts can be identified such areas as Zhylyoy district. Inder district and Makat district, where there is a significant increase in waste, as the population growth in these areas is positive (0.1% in Inder district, 0.34% in Makat district and 1.3% in Zhyloy district). In the Issatay district, an increase is also predicted, but only slightly, since the population growth is 0.09%. In the remaining three districts, such as Kurmangazy district, Kyzylkuginsk district and Makhambet district, the amount of waste will decrease annually, which is associated with a decrease in population growth, while the maximum decrease is typical for Makhambet region (-4.18%). In the Kurmangazy and Kyzylkoginsk areas, the population growth rate of -0,41% and -0,72%, respectively.
The development and implementation of a multidimensional relational database of fire danger metrological data
Authors: Glagolev V , Bazhenov R , Aibashev M , Borodin I , Dolmatova O
Published: May 2021

The study designs and implements a multi-dimensional relational database of fire danger metrological information, as well as areas with vegetation. During conceptualization, OLAP algorithms are taken into account as applied to the selection of long-term meteodata and their mathematical processing presented by multidimensional hypercubes. When designing the SQL structure, a layered architecture of geographic information system (GIS) is used, including attribute and geographical characters. The data according to the technology is tested in the Jewish Autonomous Region. The database contains metrological information from five weather stations from 1960 to 2020 and five branches of local forest districts from 1997 to 2020. At present, data is being filled in for the Omsk Region, Primorsky Krai of the Russian Federation and the Osh Region of the Kyrgyz Republic.
Specific features of potable water purification process
Authors: Alekseeva A , Karpunina I , Klyachkin V
Published: May 2021

Under this consideration there is a process of potable water purification, where the chemical and physical characteristics (water turbidity and color, aluminum and chlorine content, etc) are monitored. To work with correlated characteristics it is necessary to apply to multivariate methods. The peculiarities of Hotelling charts plotting for individual observations are well known, but generalized variance charts plotting causes some problems connected with the assessment of covariance matrix for individual observations. Solving this problem one question arises: how often is it necessary to update the limit lines on the charts? We suggest applying to the test methods of the hypothesis on the equality of the mean.
Application of the factor-criteria model as an important component of the economy and organization of metrological support of an educational holding
Authors: Gorobets Daniil , Lukyanova Yelena
Published: May 2021

Enhancing of educational system is characterized with intensification of innovations appliance at organizational processes in accordance to requirements of modern standards. An educational holding becomes the specific form of development for establishments of higher education, and it requires peculiar system for the economy and organization of its metrological support. An important component in such system is an application of specific evaluation that represents state and prospects of educational holding as an object of control. The article discloses characteristics of application of the factor-criteria model as an important component of the economy and organization of metrological support of the educational holding. It suggests parameters for evaluation of effectiveness of management enhancing at educational holding and factor-criteria model for management estimation of development of establishments of higher education.
Geoinformation and management systems for water management complexes
Authors: Epifanov A V , Antonov I V , Frolov G Y
Published: May 2021

The existing information and automated systems in the field of collecting and storing information about water users and water bodies are considered. The problems and the necessity of implement a unified information management system are analyzed. The list of necessary initial information for the work of «GIMS-water objects» and the sources of its receipt are defined. The structure and main functions of «GIMS - water objects» for the purposes of water management are described.
Design of landing of assembly machine building units with circulating load rolling bearing rings
Authors: Rogovskii I L , Titova L L , Voinash S A , Melnyk V I , Yu Remshev E , Galiyev R M , Nuretdinov D I , Vornacheva I V
Published: May 2021

The article presents the results of solving the scientific problem of ensuring folding, which is complex and includes the appointment of optimal tolerances, maximum deviations and landings in the design. The authors presented for selection of locally loaded bearing rings the field of tolerances of holes and shafts depending on type of bearings, operating conditions and the nature of load. The authors consider the definition of the dynamic coefficient through the value of the landing on the minimum tension between the circulating load ring and the surface of the connected part. Checking the correctness of the choice of landing involves ensuring the condition of strength at the allowable tension. The authors determined the equivalent dynamic load for the established requirements for design of rolling bearings, taking into account the load variability of 6005 N and calculated the durability of 9500 hours. In article it is established that on diameters of openings of demountable cases under external rings with local loading it is expedient to assign fields of tolerances H6, H7, G6, G7. The article confirms the possibility of periodic rotation of the bearing ring during the operation of the folding unit and reduce the uneven wear of the raceways.
Thermal conductivity of composite materials in the range from 7 to 80 K used in cryogenic engineering
Authors: Brodnikov A F , Bragin A V , Vichareva N A , Kazantsev F P , Kondratyev V I
Published: May 2021

A method and a measuring device designed to determine the thermal conductivity of existing and newly created composite materials used in superconducting magnets and other objects of cryogenic technology are considered. The results of studies of the temperature dependence of the modern advanced materials thermal conductivity in the range from 7 to 80 K are shown.
Satellite communication station for Ka and Q-bands
Authors: Dmitriev D D , Gladyshev A B , Ratuschnyak V N , Tyapkin V N
Published: May 2021

The article reveals the features of the organization of satellite communication systems in the remote and northern territories of Russia. The importance of providing broadband access to multimedia resources and the Internet is shown. The problems of development of an earth station of satellite communication Ka and Q-bands, providing broadband communication, are considered. Its architecture and operating principles are presented. To ensure the possibility of operation of the station in two frequency ranges, replaceable irradiation systems with a microwave path are used. The features of their manufacture are disclosed in detail. The results of experimental studies of irradiating systems with a microwave path are presented. The gain of the irradiating system with a microwave path of the Q-band in the composition with a parabolic mirror with a diameter of 1.2 m was 51.8 dB at the transmission frequencies, and 45 dB at the receiving frequencies. The gain of the irradiating system with the Ka-band microwave path was 47.8 dB at the transmission frequencies and 43.8 dB at the receiving frequencies. Thus, the use of the proposed earth station of satellite communication Ka and Q-bands will allow organizing satellite broadband communication in remote and northern territories of Russia.
Analysis of the vibrations of a console column made on a base with non-line protection in gin
Authors: Djuraev A , Narmatov E A , Murodov O J , Yormamatov T , Kh Olimjonov B
Published: May 2021

The article presents a constructive scheme and the principle of operation of the cantilever grate of a saw gin installed in the housing by means of a rubber gasket consisting of two rubber elements having different stiffness. The results of the study show that when sawing raw cotton, the saws touch the working part of the chimneys, causing blockages, which leads to damage to the fiber, as well as a decrease in the overall quality of the fiber. In this case, the total stiffness was obtained with a nonlinear characteristic. A mathematical model and its solution by an approximate analytical method. A numerical solution of the problem constructed graphical dependencies and on the basis of their analysis, the necessary values were recommended.
Multi-media animation technology for cyber-production design
Authors: Babenkov V I , Shukalov A V , Zharinov I O
Published: May 2021

The cyber-production animation design multi-media paradigm is to construct together the technological division architecture and industrial object control laws. In architecture solutions the designers pay attention to space plant and technological aggregates models (geometrical). The object control laws design is based on regulation models in time area. To reach the target cyber-production characteristics they apply automatizing tools where the primary optimal criterion is the technological processes parameters indirect measurement minimal inaccuracy. There is a scheme how the cyber-production project quality criterion is formed. The cyber-production components control methods and approaches identical state can be seen through a separate workshop cyber-segments level and also in the general industrial object level. There are algorithms how to project a cyber-production with a given criterion. The cyber-production project virtual tests and production and time models validation are based on unique experiments made by a designer in the multi-media environment.
Application of mathematical data processing to determine the actual technical state of the motor-wheel belaz gear box
Authors: Kudrevatykh A V , Furman A S , Ascheulov A S , Ashcheulova A S , Karnadud O S
Published: May 2021

Continuous plant operation is provided with machinery and equipment, which is in technically serviceable condition. Timely diagnostics of the actual technical condition of equipment and units components will allow avoiding unforeseen failures and making unscheduled maintenance or repair works. Thus, this technological operation will allow keeping the used equipment in work condition. Among the promising methods for diagnosing the actual technical condition of gearboxes of motor-wheels of open -pit dump trucks BELAZ, vibration, noise measurement and thermal methods are marked. However, it is necessary to apply mathematical methods of processing and modeling of wear processes for more accurate processing of the obtained parameters. Thus, not only the continuous operation of equipment is achieved by means of set of methods, but also the productivity of the coal mining complex increases by means of increasing the equipment resource.
To the solution problems of contact interaction in a two-roll module
Authors: Khurramov Sh R , Bahadirov G A
Published: May 2021

The basic problems of the theory of contact interaction in a symmetric two-roll module are solved. Mathematical models of roll contact curves, friction stresses and distribution patterns of contact stresses in a symmetric two-roll module are obtained. Expressions that determine the indices of the roll contact curves in a symmetric two-roll module are derived. It was revealed that the neutral point in the drive roll is to the left of the centerline, and the maximum point of the diagrams of normal contact stresses does not coincide with the neutral point and is either in the no-slip zone or in the backward slip zone.
Evaluation of probabilistic characteristics of measurement results during parts inspection
Authors: Leonov O A , Zh Shkaruba N
Published: May 2021

The features of control of linear dimensions in repair production have presented. The main factors influencing the measurement results have identified. Possible consequences of the influence of the measurement error in the control of linear dimensions have indicated. The analysis of existing methods for assessing the probabilistic characteristics of measurement results has carried out. A diagram of the control of parts such as a hole, has been drawn up, which reflects the probabilistic characteristics of the measurement results, taking into account the influence of the error on the sorting results. The results of approbation of the developed technique have presented on the example of measuring the diameters of the restored main and connecting rod journals of the engine crankshafts.
The formation of defects during the reeling of raw silk
Authors: Alimova Kh , Bobatov U , Akhmedov J A , Sobirov Q E , Umurzakova Kh Kh
Published: May 2021

There is information on the state of development of the silk industry in Uzbekistan, the tasks set and the work being done. This article describes the causes of defects in the production of high-quality raw silk, the effect of defects in the cocoon shell and methods for their elimination. The effect of the quality of raw silk on the formation of defects in raw silk in silkworm breeding has been studied. the effect of the correct execution of agrotechnical rules on the amount of defective cocoons and the relationship of shell damage during loading were studied. The origin of defects in the process of reeling and methods of their elimination are given. The effect of defective cocoons on the quality of raw silk has been given a practical justification. The results of the experiments are presented in pictures and tables.
Metrological control of welded sheet joints
Authors: Emelyanov R T , Sabinin V L , Turysheva E S , Shmidt A V , Grudinin I A , Borodin A S
Published: May 2021

The results of metrological control of welded sheet joints of studies at low-frequency processing are presented. During fusion welding, a field of residual elastic stresses is created in structures, which are extremely unevenly distributed in them. To equalize the stresses, stabilization is performed using special vibration exciters (vibrators) based on low-frequency mechanical vibrations. This provides dimensional stabilization of welded structures made of low carbon steel. The author investigated the process of vibration hardening of welded sheet joints with several combinations of adjustable parameters. As a result, graphs of accelerations and vibration amplitudes of the exciter and the system were obtained. An assessment of the influence of alternating stresses on the value of residual stresses in the welded joint is given. The theoretical studies of the vibration molding process have been confirmed.
Energy distribution modelling in the weld zone for various electron beam current values in COMSOL Multiphysics
Authors: Tynchenko V S , Kurashkin S O , Murygin A V , Tynchenko Ya A
Published: May 2021

The presented work is devoted to the study of the effect of various values of the electron beam current on the distribution of the energy cross section of the weld when conducting the technological process of electron-beam welding of thin-walled structures. The work is used by the simulation system of COMSOL Multiphysics, in which mathematical models of energy distribution proposed by the authors are implemented with electron beam welding. Imitation modelling was carried out for two materials widely used in the aerospace industry: titan alloy BT14 and AMG aluminum alloy. The values of the parameters for which the simulation was carried out were selected as a result of the predetermined process of optimizing the technological mode of electron beam welding for the construction under study. In the process of the research, a change in the value of the electron beam current is carried out both in less and to the large side. The article presents visualization for the three values of the parameter under study for each material, which makes it possible to judge the effectiveness of the previously formed set of optimal parameter values.
The influence of vibration on sedimentation stability of polymer composite materials
Authors: Sharshin V N , Sukhorukov D V , Sukhorukova E V
Published: May 2021

The work is devoted to the study of the effect of vibration on the creation of a gradient layer in cast polymer composite materials. The influence of vibration frequency and vibration exposure time on the distribution of filler particles in a polymer matrix has been studied. The presented results can be used in the manufacture of cast parts for the needs of mechanical engineering from polymer composite materials with an increased content of particles of the dispersed phase.
Model of an automated information control system based on key performance indicators for controlling production processes
Authors: Nazarevich S A , Vinnichenko A V , Morozov S A
Published: May 2021

The article presents the problems of managing the key performance indicators of the organization’s production processes. Various situations of terminological conflict and other issues of interpretation of indicators reflecting the effectiveness of management of production systems are considered. A model of automated information and control system and its decomposition of components for managing the goals and objectives of structural divisions is proposed.
Problems of methodological support in the verification of instrument current transformers
Authors: Vikhareva N A , Krylov V S , Simonova G V
Published: May 2021

The article deals with the technical and methodological problems that arise during the verification of transformers at the site of operation. Devices of this type are included in the systems of commercial metering of electricity consumption; therefore, periodic verification of their characteristics is necessary, however, in most cases, verification is necessary to perform at the installation site for a number of reasons that exclude the dismantling and transportation of transformers. The article provides an analysis of the reasons that limit the possibility of using on-site verification of transformers due to the principle of their operation and design features. The possibility of solving the identified problems as a result of the use of improved equipment and measurement rules is shown. A significant dependence of the influence of the load on the secondary winding of transformers to the error of measurement results has been established, and for voltage transformers this dependence is stronger than for current transformers. It is also proposed to provide for unique measuring instruments, such as transformers, methods for determining metrological characteristics available for their implementation at the site of operation, the use of which will lead to significant savings in verification costs.
Machinability metallic materials estimation based on acoustic emission of turning
Authors: Khripunov N V , Gorshkov B M , Samokhina N S
Published: May 2021

An experimental study of the possibility of using the acoustic emission signal during turning to assess the machinability of steel by cutting has been carried out. According to the results of previous studies, it has been shown that the use of the total acoustic energy of the cutting process to assess the machinability does not have sufficient resolution. The article presents the results of measurements of the acoustic emission signal in comparison with the results of measuring the tool wear during resistance tests. A group of samples of six steels with a known chemical composition and mechanical properties were used as materials. The group includes steels that differ a priori in machinability and steels whose machinability cannot be predicted in advance. Endurance tests were carried out for face turning with a tool made of highspeed steel with a variable cutting speed. The maximum height of the wear area in the direction perpendicular to the cutting edge was used as a criterion for machinability. The acquisition of the acoustic emission signal was carried out by a broadband sensor built into the tool holder with a preamplifier of 60 dB and a bandwidth of 50...1000 kHz. The integral energy characteristic of the RMS signal is used as a criterion for predicting the processability. As a result of the experiments, it was found that the use of an acoustic emission signal has a good resolution in assessing the machinability by turning steels.
Research of pneumatic cylinder actuator’s dynamics
Authors: Nikitin A A , Sorokin E A , Nikitina T N , Andreychikov I V , Dunaeva S P
Published: May 2021

Pneumatic actuators are widely used in industry as the most reliable automation tools. The performance of automated systems depends on the speed of pneumatic actuators. Therefore, the development of methods for studying the dynamic processes of pneumatic actuators is an urgent task. This paper proposes a mathematical model of a pneumatic actuator of the hoist, which is convenient for computer calculations using universal mathematical packages. Friction forces on transient processes in a pneumatic actuators are investigated as an example of the application of a mathematical model.
Stress-deformed state of the container with the presence of an displacement of the butt edges in the ring welded joint of the body
Authors: Rubtsov A V , Kulakov P A , Arkhipova K S , Mukhametzyanov Z R , Zakirnichny E G
Published: May 2021

Capacitive equipment of oil refineries is widely used in the operation of technological units and plays one of the dominant roles, both in terms of metal consumption and the degree of use. Depending on the purpose, the required capacity of the stored product and constructive features, containers reach rather large overall dimensions, which creates certain difficulties in diagnosing the entire surface of the vessel. In the process of manufacturing and repairing the bodies of technological tanks, it is possible to form such a geometric defect as “displacement of the edges of the abutting elements” when welding cylindrical shells to each other by circular welded seams. In the presence of geometric defects of this type, additional stress concentrators are created in the areas of the presence of these defects, which may be a prerequisite for the transition of an object to the limiting state in a fairly short period of time from the action of increased pressures and temperatures. Also, the presence of displacement of the edges on the body of the capacitive apparatuses can have a negative effect on the stress-deformed state of the considered capacity as a whole and to the formation of dislocation zones of increased stresses. Therefore, the actual work is the study of the stress-deformed state of the container with the presence of a zone of displacement of the edges in the circumferential welded seam of the body from the viewpoint of the formation of zones of increased stress. This work evaluates the stress-deformed state of the capacitive apparatus under the influence of operating parameters with a different location of the edge displacement zone in the circumferential weld on the apparatus body.
Computational evaluation of the effectiveness of therapy method with help recurrent analysis
Authors: Titov V E , Dick O E
Published: May 2021

Using the method of recurrent analysis of electroencephalograms of the brain with subsequent one-way analysis of variance, the effectiveness of the therapy method used in the clinic, associated with the formation of stable functional connections of the brain in patients with disorders of the functional state of the central nervous system corresponding to the initial stage of vascular pathology, was assessed. Decrease in the percentage of recurrent points located on the diagonal lines of recurrent diagrams and the coefficient of mutual correlation between the probabilities of recurrences of the light signal and the response of the brain to the theta and beta frequencies, as well as an increase in these indicators for the alpha-range frequencies after therapeutic effects, confirm the effectiveness of the considered therapy.
Microspectral method for assessing the functional state of chickens’ hepatocytes under intestinal infectious diseases
Authors: Akchurin S V , Larionov S V , Krasnikova E S , Akchurina I V , Krasnikov A V
Published: May 2021

Evaluation of the functional state of hepatocytes of intact chickens and chickens under experimental klebsiellosis, escherichiosis and salmonellosis is given using luminescence spectral analysis with fluorescent dye 5-([4.6-Dichlorotriazin-2-yl]amino) fluorescein hydrochloride. A gradual increase in the proteins number in the cells was recorded from 1th to 30th days in intact chickens, which indicated an increase in the metabolism level in chicken hepatocytes. The reverse trend was observed in chickens with experimental intestinal infectious diseases.
Technological processes parameters evaluation in the fire risk industrial objects analysis
Authors: Pozharkova I N
Published: May 2021

The article discusses the simulation modelling use to improve the industrial facilities fire hazard analysis solving the problem efficiency on a thermal power plant example. The fuel supply system in the SimInTech software environment model is presented, as well as the fire risks calculation results for the research facility using the received model pressure values in the oil pipeline. The estimated fire risk estimated by and without simulations was compared.
Operational process identification based on measurement results
Authors: Vershinina L P
Published: May 2021

Features of identification of technological process in real time are considered. It is shown that the use of standard statistical methods in conditions of insufficiency and inaccuracy of measuring information is limited. Special methods of processing the measurement results are given. An algorithm for operational evaluation and prediction of product parameter values based on measurement results, taking into account identification features, is proposed.
Development of methods for assessing the performance of teachers using of TUIT-LMS data
Authors: Alisherov F A , Iskandarov S Q , Sh Bekturdiyev S , Khujaev O K
Published: May 2021

The use of data mining methods is one of the current trends, which is widely used in finance, health, telecommunications, e-learning and others. Much of the research in the field of education is focused on the assessment of students’ performance. But the impact of teachers on the quality of education is also significant. The traditional way to evaluate a teacher’s performance is to conduct an assessment survey that takes into account the student’s point of view. The article solves the problem of classification of teacher’s activity using Generalized Linear Model, Deep Learning, Decision Tree, Random Forest methods based on the results of the survey and textual data based on the survey data conducted in the TUIT-LMS system and determines the reliability of the results.
Monitoring of ice formation of overhead power line wires
Authors: Panteleev V I , Maleev A V
Published: May 2021

Reliable operation of electric power systems is impossible without the creation of modern monitoring devices that control all processes of production and distribution of electric energy. The authors of the article developed an intelligent system for monitoring ice formation and determining the wire sag boom using machine vision technology. The monitoring system under consideration is placed on a support in close proximity to the wire and consists of the following main elements: an electronic unit, an optical sensor, a solar panel and a GSM antenna. The developed monitoring system in close proximity to the thickness of the ice wall and indirectly, by the angle of deviation of the wire relative to the horizontal position, to determine the mass of ice deposits and the arrow of the wire sag.
Effective criteria for determining the number of measurements selection
Authors: Barbashov N N , Barkova A A
Published: May 2021

This paper describes a method for determining the number of measurements, which allows you to increase the accuracy of measurements, as well as reduce the number of measurements in cases where the variance is small. In the same cases, when the share of random error is significant, additional measurements allow you to avoid an erroneous result, which can lead to a defective product.
Selection of rational algorithms for controlling high-precision details
Authors: Barbashov N N , Samoilova M V , Abdullina L R
Published: May 2021

One of the most important and complex issues in the automation of technological processes is control automation. At present, active control is the most promising, aimed at ensuring the required quality of dimensional and other parameters of products in the very process of their production, at automating high-precision technological processes, reducing losses from rejects and control costs. In modern production with the help of active control means, the problem of increasing the manufacturing accuracy can be solved by choosing a rational control algorithm. To create an effective control system for the accuracy of machining a part, active control devices are often used that work according to various algorithms. Most modern machine tools are equipped with active control sensors that allow measuring the dimensions of the manufactured parts and setting up the machines during operation. The sensors are controlled by microprocessor blocks, which allow additional control to be introduced and the machine to adapt to changing processing conditions, which increases productivity and accuracy. Modern software allows you to effectively control the processing process, therefore, the choice of a rational control algorithm plays a special role.
Development of a control and measuring method for assessing the state of patients with «HIV + tuberculosis» coinfection
Authors: Ponomarev S B , Averyanova E L , Ponomarev D S , Lakina I A
Published: May 2021

The scientific research presents a control and measuring method for assessing the condition of patients with HIV-associated tuberculosis. The methodology was developed using a point-based method for assessing indicators. The studied parameters were grouped into 4 clusters (anamnestic data, comorbid diseases, clinical data, laboratory studies). The metrological support of anamnestic data and clinical data was considered in particular detail. The approbation of the technique was carried out on patients who are kept in institutions of the penal system. The applicability has been proven using the methods of systems analysis (correlation, regression and analysis of variance data).
Instantaneous gas flow rate estimation in the gas-gathering system flowline by indirect measurement method
Authors: Krasnov A N , Yu Prakhova M
Published: May 2021

Implementation of modern automation systems on the northern gas fields located at the final stage of operation, is unprofitable economically and is not always possible technically. At the same time, the competent operation of such deposits requires constant monitoring for the state of gas wells and the shelves of the gas transmission network. In particular, the pressure and temperature is obligatory at the mouth of the well and at the end of the shelf. Also an important parameter from the point of view of regulating the modes of the wells is the instantaneous flow rate of the shelf, which is currently not measured at the old deposits. The article proposes to assess the Instantaneous consumption by an indirect method, according to the values of pressure and temperature. The algorithm for calculating the consumption is proposed, the testing of which at the Urengoy gas condensate field confirmed its adequacy. The monitoring system of technological parameters is built into gas fishery ACS. The algorithm visualization is implemented in the SCADA HMI / Cimplicity software package.
Design of Flexible Jig for Leg Manufacturing on Jack-up Plateform
Authors: Wang Shun , Hou Lixun , Wang Ji , Liu Yujun
Published: May 2021

Due to various designs in racks and semicircle tubes, dedicated jigs are used in the manufacturing of most jack-up legs, which decreases the productivity. In this research, a new flexible jig system with jig and support column is designed to meet different production requirements of many jack-up platforms. Firstly, two kinds of adjustment bolts i.e. position bolts and angle bolts are designed for accurate positioning and attitude adjusting. Moreover, considering supporting height differences of the legs, an integrated mode of standard and specific components is adopted in construction of the support columns. By using of the new flexible jig, productivity of many jack-up platforms construction is greatly improved.
Review on Stick-slip Vibration’s Mechanism Analysis and Its Control Strategy in Deep Drilling with Drag Bits
Authors: Shuguang Liu , Wuyang Chen , Kecheng Wu , Jia Jiang
Published: May 2021

The stick-slip Vibration is one of the major causes for drilling quality reduction, shorter drilling tool lifespan, drilling efficiency decrease, it also affect the drilling cost and completion period seriously. The complex situations in the process of drilling result in the slow progress in this aspect, they rarely break through. The recent advances are outlined in stick-slip vibration of the drill string in three areas: theoretical analysis, experiment research and control strategy. The main research direction, methods and existing problem in the progress are introduced, which will provide reference and guidance for further research.