bluuebunny/crossref_metadata_2025 huggingface dataset:
Existing Problems and Countermeasures of Energy-efficiency Residence Exploitation in China
Authors: Chen Boyang
Published: June 2021

Energy-efficiency residential building, based on the concept of green building, aims to solve the new field of residential problems. The purpose of the development of energy-efficiency residential buildings is to provide livable buildings for people with the lowest energy consumption. It reduces energy consumption throughout the life cycle of the building and contributes to sustainable development. However, this study finds that there are many obstacles in the process of promoting the use of energy-efficiency houses. There is not sufficient government support. Real estate companies avoid the promotion of energy-efficient buildings on a large scale by pursuing the maximization of profits. Buyers are blindly buying due to a lack of energy-saving awareness and related knowledge. To solve these problems, through literature research, this paper shows the progress status of the domestic energy-efficiency houses, excavated the existing obstacles, and attempt to offer specific measures and methods to break the obstacles from the three dimensions of government, enterprises and customers.
Monitoring of Irrigation Area in Chuanhang Irrigation Area Based on MODIS Daily Surface Temperature Range
Authors: Rui Wang , Yuanyuan Duan , Mengyi Li , Rongjie Gui , Jun Liu , Min Chen , Long Song Wen
Published: June 2021

Monitoring and analysis of irrigated area is of great significance to evaluate irrigation benefit, agricultural drought situation and regional water resources utilization. This article selects MODIS surface temperature products from 2016 to 2020. Using the method of daily difference in surface temperature, eliminating the influence of precipitation, realizing remote sensing monitoring of irrigation intensity and spatial distribution of irrigation area. The results showed that the average number of irrigation times in five years was in the range of 6-8. Due to factors such as rainfall during the irrigation period, the overall irrigation frequency from 2016 to 2018 is less than the overall irrigation frequency in 2019 and 2020. On June 11, 2018, remote sensing images detected irrigation areas of Buzi Town, Longhe Town, Yangbei Town and Chenji Town, which were consistent with the data of irrigation areas.
Monitoring Islands and Reefs Area Based on Satellite Remote Sensing Image
Authors: Yu Zhen
Published: June 2021

The distribution of islands and reefs is wide, and the field survey cost is high and difficult. After the identification of islands and reefs, how to carry out effective monitoring is also a problem. By comparing three remote sensing monitoring methods, this paper analyzes the advantages of satellite remote sensing image to obtain islands and reefs area monitoring methods, and puts forward three methods based on satellite remote sensing to monitor islands and reefs area, so as to provide reference for islands and reefs area monitoring.
Building Semantic Information Extraction Based on Full Convolution Neural Network and Parameter Transfer
Authors: Zhang Yue , Liu Congna , Tang Ruipeng
Published: June 2021

Aiming at the problem that the generalization ability of deep convolution neural network model is limited, this paper extracted the semantic information of buildings in different regions by combining the transfer learning method. Taking the Massachusetts aerial image building data set as an example, the layer depth structure of Segnet network model is improved, and a new model is trained by migrating the parameters of the improved model and combining with a small number of Guilin building image data samples. The extraction results were analyzed and compared. The results show that, by transferring the parameters of the trained model, the Kappa coefficient and F1 score of buildings in Guilin area reached about 0.8.
Inter-monthly regional variation of sea surface salinity and influencing factors in the East China Sea and the adjacent Northwest Pacific Ocean
Authors: Lu Yan , Kang Jiancheng , Meng Xiangchun
Published: June 2021

Based on 1871-2010 monthly sea surface salinity (SSS) and flow field data, and the global seabed topography data, the inter-monthly regional variation of SSS in different regions and their influencing factors are discussed after climate zoning in the East China Sea (ECS) and the adjacent Northwest Pacific Ocean (ANPO). Rresults show that: (1) the study area can be divided into the area of the ECS, the Kuroshio area of the East China Sea (KECS) and the ANPO I area, II area and III area. (2) In the continental shelf area of the ECS, the inter-monthly regional variation of SSS is significant, the inter-monthly variation range of feature points is large and the difference of SSS value at each point is great. (3) In the KECS, the inter-monthly regional variation of SSS is small. The SSS at feature points is high and the inter-monthly variation is small. From the inlet to the outlett of the KECS, the SSS value gradually increases. (4) In the ANPO, the inter-monthly regional variation of SSS is the smallest, the SSS at feature points is high, and their inter-monthly variation is small. The SSS increases with increasing longitude at the same latitude, and decreases with increasing latitude at the same longitude.
Numerical Simulation Analysis of Seismic Fragility of Vertical Floating-roof Storage Tanks
Authors: Wang Mengzhu , Sun Zongguang , Sun Jiangang , Cui Lifu
Published: June 2021

To study seismic response of tank, 10 × 104m3 vertical floating-roof tank model is established. The probability relationship between the intensity measure and engineering demand parameters is established based on extensive nonlinear dynamic time-history analysis. Four failure modes of tank were determined, and seismic fragility curve of under each failure mode was obtained. The results show that under frequent earthquake, the exceeding probability of circumferential tensile damage, and instability of tank wall in intact state were 40% and uplift of the bottom sheet was 75%. Under design-based earthquake and rare earthquake, circumferential tensile damage was in intact state, and the exceeding probability of instability were 66.9% in medium damage and 52.9% in severe damage. The exceeding probability of bottom uplift in severe damage is 90%. The method takes the randomness of ground motion into account, which can provide an effective idea for the evaluation of the seismic safety of tank structure.
Research on the Application of Green Building in Building Design
Authors: Zheng Leilei
Published: June 2021

Green building has an important impact on building design, so it should be emphasized. The application of green building design concept to housing design can better improve the design effect. But the use of green building design concept need to follow certain principles, in order to better serve the construction industry. According to the related concepts in the development of green building design, and combined with practice, this paper briefly analyzes the application of green building concept in housing design. It provides some reference for the development of construction industry.
Research on the Temporal and Spatial Changes Characteristics of the Drought of Natural Vegetation in the Yangtze River Source Area Based on CWSI
Authors: Dai Xitong , Yao Liqiang , Yuan Zhe , Sun Keke
Published: June 2021

Under the combined effect of global climate change and local regional environmental change, drought has developed into a natural disaster with high incidence on the earth. As the Yangtze River is the mother river of Chinese civilization, the drought phenomenon in the source area in recent decades has seriously affected and restricted the development of local agriculture and economic society. With the long-term practice of remote sensing technology, researchers have improved drought monitoring methods, including crop water stress index. Crop water stress index (CWSI) is widely used in agricultural drought research based on the principle of heat balance. In this paper, the spatial and temporal characteristics of drought in the Yangtze River source area and its influencing factors were analyzed by using crop drought index method. The CWSI value of the source area of the Yangtze River featured a slightly downward trend from 2001 to 2018. With a strong spatial heterogeneity in distribution, it gradually decreases from west to east. The severest drought occurs in summer and autumn, and the regions that are mostly influenced by temperature are mainly in southwest part and the ones mostly influenced by precipitation are mainly in east part. By analyzing the temporal and spatial distribution characteristics of drought and the correlation of meteorological factors, this paper provides an effective basis for drought prevention and control in the Yangtze River source area, and then promotes the accelerated development of agriculture and economic society in the Yangtze River source area of our country.
Overview of the III International Conference “MIP -III-2021: Modernization, Innovations and Progress”
Authors: Kovalev Igor V , Testoyedov Nikolay A , Voroshilova Anna A
Published: June 2021

The overview describes the main directions and results of the III International Conference MIP-III-2021 held in Krasnoyarsk in April 29-30, 2021. It gives the details about the participants and the proceedings.
Comparison of characteristics of St3 in a free and annealed state
Authors: Nasibullina O A , Yu Pechenkina M
Published: June 2021

For the manufacture of field pipelines, low-carbon steel grade St3 is often used. It welds well, almost never hardens, and therefore is very convenient for working in structural elements. Studies of samples from this steel grade were carried out for the initial and heat-treated state by the following methods: study of mechanical properties (tensile test, hardness test); microstructural analysis. At the beginning of research, annealing was carried out in the work to obtain an equilibrium structure. According to the results of the experiment, it was noted that after annealing, the steel structure acquired low strength and hardness with high plasticity. After annealing, tensile tests were carried out on steel samples. Tensile tests of the metal were carried out in order to determine the main indicators of mechanical properties and to compare these properties in the initial and heat-treated state. Hardness measurements were carried out according to the Rockwell method. The microstructure of steel samples was studied using an optical microscope “Metam RV-21-1”, which made it possible to study the microstructure at a magnification of 200 times. It is shown that the structure of steel is ferritic-pearlite. In the initial state, there is a segregation banding and segregation streamer. The structure of the steel under study in the initial state is fine-grained. After annealing, it becomes more homogeneous, and the deformation texture disappears.
Protective structures on carbon steel in aqueous-salt solutions containing catholyte
Authors: Yu Pechenkina M , Nasibullina O A
Published: June 2021

The process fluid of oil fields, with a huge amount of dissolved gases, mechanical impurities, salt ions, mineral acids and bases present in them, has a destructive effect on the internal surface of oil collection equipment. The simultaneous presence of carbon dioxide and hydrogen sulfide pose the greatest danger, since they are catalysts for the cathode reaction of hydrogen depolarization of low-alloy steel, and lead to the formation of soluble corrosion products - iron hydrogencarbonate. One common way to prevent electrochemical corrosion of oil equipment is to neutralize acidic components of process media. Sodium hydroxide is often used as a neutralizer, however, the content of sodium salts contaminates the obtained oil products and catalysts and leads to disruption of the technological process of its further processing. Accordingly, there is provided a process for the non-reactive neutralization of acidic components by introducing a solution of a hydroxide-saturated catholyte. In the scientific and technical literature, the problem of forming protective films on the surface of carbon steel by introducing catholyte into the process liquid remains insufficiently studied. In scientific research work, a method of forming surface structures by selecting the concentration of a catholyte solution has been developed. The thickness of the obtained protective structures obtained in the model of produced water formed on the surface of low-alloy steel A516-55 in solutions of sodium hydroxide and catholyte was calculated. The study revealed the dependence of the corrosion rate of steel on the concentration of sodium hydroxide solution and catholyte solution at various pH values.
Research and optimization of the hydraulic performance of bench lines for testing of low thrust spacecraft engines
Authors: Nazarov V P , Zuev A A , Zhuikov D A , Tolstopyatov M I
Published: June 2021

Low thrust engines perform important functional tasks in control systems of motion, orientation and stabilization of spacecraft on various paths and space orbits. They are subject to high-reliability and long operating time in pulsed modes with a large number of starts. Bench tests of the engines are a special part of the program development of low thrust engines with high reliability and efficiency. The article analyses wave processes in hydraulic lines of test benches, which prevent obtaining reliable parameters and performances of engines during tests. Authors show that the exclusion of oscillation processes in test bench systems is the main condition for the organization and planning of tests. Similarity conditions for bench hydraulic lines of spacecraft propulsion systems are developed. A methodology for estimating the frequency responses of the bench lines during pulsed test modes is presented. Mathematical functions of geometric parameters of the bench hydraulic lines on the pulse responses of low thrust engines are obtained, allowing optimization of the bench propellant feeding system to avoid resonance oscillation processes. Research results provide reliable estimates of the parameters and reliability of low thrust engines.
Improvement of the processes of forming tight shells of double curvature
Authors: Markovtsev V A , Karpukhin E G , Mikheev V A , Alvarenga Roberto de , Yu Kosolapova A
Published: June 2021

The article analyzes the process of shaping double curvature shells made of aluminum sheet material used for covering the outer contour of an aircraft. The main rejection signs of casings made by the method of shaping by wrapping are considered. The main problems arising during the shaping of double-curvature shells by wrapping are presented, and the ways of their solution are considered and proposed.
Artificial intelligence for imaging data analysis in materials science: microscopy and behind
Authors: Okunev A G , Yu Mashukov M , Sankova N N , Nartova A V , Matveev A V
Published: June 2021

In various fields of microscopy, a fairly common task is to count and determine the size of the studied objects. Sometimes this is a one-time tedious task that is done by lab personnel without the programming skills. In this paper, we present an approach that allows researchers to perform automated processing of research imaging data using our services and even to train deep neural networks on their own in no code mode.
Torsion of a thin-walled structure of a waveguide with rectangular cross-section
Authors: Kudryavtsev I V , Brungardt M V , Goncharova E A , Li O A , Troshin S I
Published: June 2021

The paper has considered the problem of determining the stress state of thin-walled waveguide structures during torsion. An analytical solution using the Bredt’s formula has been considered and its comparison with a numerical solution using the finite element method has been performed. The numerical solution has been carried out using a created volume model, and the load has been modeled as a set of concentrated forces distributed over the entire cross-section of the waveguide. It has allowed us to reduce the local effects in the form of complex stress state and increase the accuracy of the results. Comparison of the results has shown that the stresses calculated by the finite element method are always higher than those obtained by the Bredt’s formula and it is necessary to take into account their maximum values. The deformation evaluation also has shown that the FEM calculations give larger twist angles than those obtained by the Bredt’s formula for all the considered section sizes.
Effect of titanium and chromium diffusion coatings on corrosion resistance of sintered iron
Authors: Sokolov E G
Published: June 2021

The authors have studied the effect of titanium and chromium diffusion coatings on corrosion resistance of sintered iron in solutions of acids and salts. The samples of 85% density were obtained from powdered iron by static pressing in press dies and sintering in vacuum. The diffusion coatings were applied in molten lead with titanium and chromium additives at the temperature of 1100°C and 2 hours exposure time. Microstructure of the samples was then explored by the optical metallography method. The content of elements in the coatings was measured using energy dispersive X-ray microanalysis. Studies of corrosion resistance of the samples in solutions of acids and salts were conducted by the gravimetric method. Corrosion resistance was also evaluated by time to the first corrosion foci emerging and the area of corrosion damage. Diffusion titanium and chromium coatings have ensured higher corrosion resistance of sintered iron in all the aggressive media studied. Chromizing is the most efficient for protecting sintered iron in solutions of sulphuric and nitric acids, as well as in media containing acetic acid and hydrogen peroxide. Meanwhile, titanizing is the most efficient for protecting sintered iron in sea water.
Effect of microalloying on the stability of the endurance characteristics of hot-deformed powder steels
Authors: Dorofeyev V Y , Sviridova A N , Berezhnoy Y M , Bessarabov E N , Sviridova S V , Kochkarova K S , Derlugyan I D
Published: June 2021

The stability of the characteristics of the contact and low-cycle fatigue life of steels obtained from iron powders with different contents of alloying and microalloying elements, as well as impurities, has been studied. The carbon content in powder steels was varied. It has been established that doping Na or Ca microadditives contributes to an increase in the stability and absolute value of the parameters of the contact and low-cycle fatigue life of hot-deformed powder steels due to the activation of cohesive interaction on interparticle surfaces and carbon diffusion, which contributes to the formation of a homogeneous structure. Doping microadditives of Al contributes to an increase in the contact and low-cycle fatigue life of the powder steels in comparison with the samples-witnesses. However, the formation of zones of structural heterogeneity in steels containing more than 0.4 wt. % C, causes a decrease in the stability of these characteristics.
Differential thermal analysis of the results of isothermal discrete scanning of sheet aluminum material
Authors: Mikheev V A , Agafonova D V , Doroshko G P , Krasheninnikov M A
Published: June 2021

The article presents an application of temperature and thermal analysis of discrete scanning data of heat perception of alloy 1163 to take into account thermal effects during plastic deformation.
Influence of full-scale climatic tests on the properties of aluminum alloys in zones of river and marine water mixture
Authors: Bulysheva N I , Varchenko E A , Nazarenko A V , Yu Glushchenko G , Goncharov A A , Gladkikh A V
Published: June 2021

Within nine months, comprehensive studies were conducted on the effect of full-scale climatic tests on the properties of samples of aluminum alloy AMg6 when fully submerged in the estuary region of the Don River (the basin of the Sea of Azov) at two stations. The features of the formation of micro- and macro-fouling communities on experimental plates at one, three, six and nine months after the start of the experiment are shown. It is shown that microfouling communities on the experimental plates begin to form within a month of exposure. Diatoms were the background-forming species during the entire practical period of the study. Single macrozoobenthos organisms begin to appear on the samples after three months and only at second station. After six months, macro-fouling organisms are fixed on plates at both stations. As the exposure period increases, the number and biomass of macro-foulers increases. The corrosion resistance assessment of the samples revealed the absence of intercrystalline corrosion during the entire test period in water, at both stations, as well as pitting corrosion during the first six months of exposure.
Forecasting and operational assessment of the quality of repaired units
Authors: Apazhev A K , Shekikhachev Y A , Hazhmetov L M , Shekikhacheva L Z
Published: June 2021

Evaluation alone is not enough to improve product quality. It is necessary to have not only the estimated indicator itself, but also to declare the factors that influence the formation of quality and to investigate this influence. Only then does it become possible to carry out quality management. To study the quality of repaired products, we use the economic and statistical method, which is as follows. Product quality is considered in two aspects: production and consumer. Manufacturing quality is a set of product properties (physical, chemical, physical and mechanical, etc.) obtained by it in the process of manufacturing or repair. The consumer quality of products manifests itself in the process of consumption (operation) and is determined by the cumulative impact of all characteristics of production quality and conditions of consumption. With the help of the correlation level, two main tasks can be solved: operational quality assessment at the stage of production (repair), based on predicting the consumer quality of the projection according to the known values of its production quality indicators; management of the production quality of products in accordance with a given level of its consumer quality. The most characteristic indicators of the production quality of the repaired units are the errors in the dimensions of the shape of parts, the relative position of their surfaces, the size of the washed out links of the dimensional chains of mechanisms, the physical and mechanical properties of materials, etc. At the repair enterprise, by means of appropriate measurements, the values of the indicators of the production quality of batches of products are determined. Then, in operation, these products are monitored in order to determine their consumer quality. The consumer quality of repaired products can be expressed by a number of indicators, but the most expedient is the use of such an indicator as winding to the first failure caused by aging processes (wear, fatigue failure, etc.). Considering the above, research aimed at predicting and quickly assessing the quality of repaired units is an urgent problem.
Semi-automatic welding in the environment of protective gases of welded structures from hardening steels with regulation of thermal cycles
Authors: Zharinova N V , Vakulenko M V
Published: June 2021

In order to increase the technological and operational strength of welded joints of type X12CrMo5 steels in the process of welding in a protective gas environment, it is possible to use vibration deformation treatment of a welded joint with a pearlite joint to form a metal structure of a welded joint with minimal sensitivity to the formation of cold cracks due to an increase in the rate of heating and cooling, reduction of residence duration and provision of conditions of high-temperature decay of austenitic metal structures in seam and near-seam zones above critical temperatures. The work carried out research on the process of semi-automatic welding in the medium of protective gases in the mixture of carbon dioxide and argon with pearlite and austenitic welding materials of welded structures from hardening steels of grades 12Kh2M1 and X12CrMo5 with regulation of thermal cycles (RTC) due to the use of vibration deformation treatment and accompanying forced cooling.
The effect of machined wheel profile geometry on cutting force
Authors: Kanatnikov N V , Pashmentova A S , Radchenko S Y
Published: June 2021

The mechanisms based on standard geometry gears have reached their technological limits. To meet the needs of the market, it is necessary to meet new and new, often conflicting operational requirements. At the same time, it is necessary to reduce the mass of the node and increase the maximum torque, in addition, the noise level and increase the axial load must be reduced. To achieve the increasing requirements for the operational characteristics of mechanisms gears with specially designed tooth geometry are used. A tool for cutting such gears must be specially designed and manufactured for each new gear pair, given into account its design features. The introduction of a new tool in the technological processes of machining gear profiles leads to the fact that the surface quality decreases and tool wear increases. At present, the concept of this problem is scattered and composed of the experience of individual researchers. The work reveals the dependencies connecting physical phenomena accompanying the cutting process and the geometric parameters of the profile of the bevel gear. Based on the results of the project, it is possible to calculate the optimal profile parameters based on the technological parameters of the process.
Classification of mechanical engineering products at the stages of their life cycle
Authors: Bazrov B M
Published: June 2021

The article analyzes the classification of mechanical engineering products; it is shown that in the overwhelming majority of classifications, products are considered as objects of operation and there are practically no classifications of products as objects of production (except for the classification of parts) and objects of disposal, which negatively affects the efficiency of machine-building production. A methodological approach is proposed to construct a classification of products as objects of operation, items of production and disposal objects.
Model of analysis of the results of geometry scanning of turbine nozzles
Authors: Yu Pechenina E , Pechenin V A , Bolotov M A
Published: June 2021

The paper presents a mathematical model to perform computer calculation for open flow area of turbine nozzles. The model is used to work with objects in *.stl format when processing data after scanning. Using the developed model, calculations of the part quality parameters will not depend on the controller qualifications, and the proposed approach will not require unique adjustment, costly repair and storage of reference patterns for all sizes of nozzle devices. The calculation was performed in three sections, which improves accuracy while reducing labor intensity and cost of measurement. Increasing the number of sections practically does not affect the labor intensity of calculations, so there are no significant restrictions on performing virtual measurements in four or more sections. The model was implemented in the mathematical package MATLAB. The model was tested with the example of STL processing of the turbine nozzle blades sector.
Choosing a statistical method for predicting a quantitative indicator
Authors: Vlasov R G , Korobov Yu S
Published: June 2021

The aim of the study is to find a machine learning method that allows achieving the maximum accuracy of the forecast when training on a specific data set. The article provides a comparative overview of strategies for choosing the optimal machine learning method. The process of training sample preparation is considered, the necessity of its modification is justified. The search for the optimal machine learning method was carried out in the statistical computing environment “R” using the package “CARET”. The graphical results of training 96 algorithms that implement various statistical methods are presented, and the choice of the best one is justified on the basis of the proposed methodology.
The motor brake of a compressor type
Authors: Verbitsky Viktor V , Pogosyan Vladimir M
Published: June 2021

The accident rate in road transport remains very high and it is necessary to consider all the factors that affect this process to reduce it. In this regard, special attention should be paid to the process of long-term braking, the negative manifestations of which require the development of additional braking systems (retarding retarders) for vehicles operating in mountainous areas, primarily in the sphere of passenger transport. Transmission retarder brakes, which provide sufficient braking performance, have a number of disadvantages that hinder their use. The existing motor brakes-retarders show insufficient retardation and Kuban State Agrarian University conducted researches to improve their effectiveness. The compressor brake mode was experimentally studied after the theoretical analysis, in which an increased pressure was created in the inlet collector, and at the end of the compression stroke, the air from the cylinder was released through a special valve back into the system, which created the braking effect. The experiments have confirmed the possibility of a significant increase in the braking torque of the engine in the compressor brake mode, when both flaps are closed - the exhaust flap after the exhaust collector and the inlet collector before the carburetor, and compressed air is supplied to the inlet collector at different pressures. Then the braking torque increases in comparison with the engine braking more than 3 times.
Functional product map design in lifting and transportation machine building digitalization conditions
Authors: Prilutskaya M A , Murukina A D , Podoliak O O
Published: June 2021

In the Industry 4.0. mechanical engineering is undergoing major changes. Combining industry and digital technologies for the flexible and efficient production creating is a main idea of the Fourth Industrial Revolution. The article proposes a high-tech product functional map designing approach based on the author’s functions classification, taking into account the specifics of products designed within the Industry 4.0 framework. Based on the warehouse floor transport market trends study, as well as the forklifts consumers survey results, a functional map of a product designed at the Russian lifting and transport engineering enterprise was proposed.
Synthesis of the control loop for the coordinate of the horizontal plane of the quadcopter information-measuring and control system
Authors: Ba Phuong Dinh
Published: June 2021

The article discusses the translational motion of a quadcopter on a horizontal plane. Based on the analysis of this movement, a control loop for the horizontal plane coordinate of the information-measuring and control system of quadcopters was synthesized. The results obtained provide a stable flight of the quadcopter, a decrease in the influence of wind disturbances and monitoring of various objects when performing special tasks.
The study of the welding relief shape influence on the linear friction welding process
Authors: Gatiatullin I M , Galimov V R , Medvedev A U , Karetnikov D V
Published: June 2021

The study of the welding process of asymmetric parts made of Ti-6A1-4V alloy was made to expand the field of application of the process of linear friction welding and to improve the use of technology of existing assemblies. During of the study, it was found that the process of welding T-joints has features in a longer duration of the unsteady stage and an increase in the amplitude value of the shear force during the steady state. Welded joints do not contain seam flaws over the area of the welded joint, which it made unnecessary to assign an allowance along the perimeter of the welded section. The change in conditions at the joint is expressed in an increase in the microhardness of the welded seam in comparison with the Ti-6A1-4V joints, which are produced by the traditional technology more than 50 HV.
Automated control system functions for complex structured technological processes
Authors: Korneev A M , Smetannikova T A , Lavrukhina T V , Al-Saeedi F A
Published: June 2021

A system for determining the optimal technology and process control has been developed. The system provides identification of global and local technologies, flexible management of end-to-end technology with the issuance of appropriate recommendations about the further progress of the production process. The data obtained during the operation of the system is recorded by the report generation subsystem for further analysis. The developed system allows you to implement optimal process control, both at the level of an individual product and for a batch of products. The system provides the ability to adapt to changing production conditions. A procedure for selecting the most effective optimization method for managing local technology has been developed.
Machine learning in the development of regulators: the specifics of data preparation and the choice of the ML model algorithm
Authors: Staroverova N A , Shustrova M L , Fatykhov M Z
Published: June 2021

The article considers the stages of regulators development based on machine learning. Machine learning, like a fuzzy logic, is used in PID regulators in two ways: it is able to build the regulator or a unit for adjusting its coefficients. A feature of machine algorithms is the “learning” ability which allows you to transfer the experience of an expert to the system. The presence of a learning procedure distinguishes the configuration of regulators based on machine algorithms from the classical approach. The publication analyzed the possibility of using regression machine algorithms (models) of the Scikit-learn library (Python) to solve control problems using the example of a level regulator. The search for an effective data processing model led to the construction of ensemble algorithms based on stacking. The high degree of compliance between predicted and test data confirms the accuracy and stability of the results. The results presented in the article can be used in a simulating or in developing a controller based on a machine algorithm.
Model reproduction of non-equilibrium thermodynamics principles as a means to provide software self-development
Authors: Kol’chugina E A
Published: June 2021

Further evolution of technologies in material sciences, hardware and software demands reproduction of self-organization as a manifestation of non-equilibrium thermodynamics principles in new artificial environment. This is especially actual for software engineering, where reproduction of non-equilibrium thermodynamics principles will allow enhancing speed and quality of development process. In this article we reveal, list and analyze principles to be reproduced in artificial systems to provide capabilities for self-development, self-healing and self-improvement. It is shown that self-development process is impossible without reproducing the metaphor of electric charge with its abilities for attraction and repulsion. But this metaphor is usually avoided in computer models. We propose and consider a method to reproduce the metaphor of electric charge in computer models by means of UNIX/Linux operating system tools. The obtained results provide the basis to establish an artificial physics, a new research area dedicated to adequate reproduction of principles of physics in the artificial environment of computer models.
Hardware-software complex of a speech-like interference generator for speech information protection
Authors: Alekseev V V , Yakovlev A V , Moiseeva M V , Tikhomirova A A
Published: June 2021

The article describes a model of a speech-like interference generator based on a system analysis of ways to solve the problem of protecting speech information in office-type premises. The results of the effectiveness of the model application are presented.
Face recognition using multitasking cascading convolutional networks
Authors: Musikhin A G , Yu Burenin S
Published: June 2021

The face recognition has many applications in such areas like intelligent security and access control, biometrics, safeguard, verification, attendance accounting, machine vision, etc. Identification of a personality by the face has a number of advantages over other methods: the person does not need to be contacted physically, which is the most acceptable way for mass applications and no complicated or expensive equipment is required. This article discusses the problem of recognition and identification of a person’s face using convolutional neural networks that process frames from a camera in real time or from a recorded video file with the subsequent entry of the identified person into the database. Multitasking Cascade Convolutional Neural Network (MTCNN) has three convolutional networks (P-Net, R-Net, and O-Net) and is capable of outperforming many face detection tests while maintaining real-time performance. The proposed method for human face recognition was developed as a software product, tested and showed the probability of correct recognition in real time 96.02%.
Determination of natural gas content of coal
Authors: Kenetayeva A A , Usupayev Sh E , Zhurov V V , Rabatuly M , Baymuldin M K , Balniyazova G M
Published: June 2021

The main provisions of the laboratory work are as follows. Purpose - to determine the gas content of coal, which characterizes the actual gas content in coal, and is also the main parameter for predicting gas release into existing mine workings. The gas content is determined in laboratory conditions, and the gas pressure can be determined indirectly on the basis of sorption isotherms, which are characteristic of the corresponding different types of coal. Terms and Definitions. Gas bearing capacity, gas content is the volume of gas contained in the mass [m3/t] of coal. Depending on the composition of the gas, the gas content can be divided, for example, into methane content and carbon dioxide content. Since methane is the main constituent of gas in most cases, the term “gas content” is usually used to mean “methane content”. The value of gas content is usually taken in normal conditions (273 K and 1013.25 hPa).
Methods of improving the power supply reliability of industrial site
Authors: Khismatullin A S , Bashirov M G
Published: June 2021

Ensuring reliability is one of the most important problems in the creation and operation of any technical system. It is especially relevant for complex systems such as power supply systems. A modern industrial site from the power supply point of view is a complex technical system of hazardous industrial facilities, the technological processes continuity and safety of which directly depends on the power supply reliability. Electricity receivers of the considered industrial site in terms of power supply reliability belong to the second category. The task of ensuring the power supply reliability includes a whole range of technical, economic and organizational measures aimed at reducing damage from disruption of the electricity consumers’ normal operation. In addition, in modern market conditions, the power supply reliability is inextricably linked with the economic performance and industrial enterprises energy security. The paper proposes to modernize the industrial site power supply circuit, using the existing standby diesel power plant, which would automatically provide the industrial site power supply in automatic mode in case of disappearance, decrease, increase in voltage level, phase failure, and the phase sequence violation of the three-phase supply voltage on the busbar sections TP-1, TP-2 site. It is obvious that with the existing power supply scheme of the industrial site, the manual switching sequence, control over the backup diesel power plant operation, the normal power supply scheme restoration, it takes an average of 2.5 hours, which is not desirable, especially in winter. Therefore, it is necessary to introduce at the industrial site production control devices for the reserve automatic transfer, which ensure the power supply restoration to the industrial site in automatic mode.
Assessment of the contribution of phase transformations to the space-time distributions of the temperature of the filtering oil
Authors: Efimova G F , Levina T M
Published: June 2021

The solution of the problem of filtration of paraffinic oil by asymptotic methods in the form of endless sequence of boundary value problems for the expansion coefficients of the required solution in the Maclaurin series is obtained. Estimation formulas were used to calculate the space-time temperature distributions in the first approximation for the vibrational motion of viscous oil and the contribution of phase transformations of paraffin wax. The results can be used for theoretical substantiation and further development of thermal methods for influencing oil-bearing reservoirs, as well as for predicting temperature processes in the bottomhole zone.
Exploring of an open hammer die life with an expanding gutter using information technologies
Authors: Khaimovich I N , Elistratov D A
Published: June 2021

Currently, open dies with a parallel bridge are widely used. The design of such stamps is carried out according to proven methods. However, the dimensions of the bridges obtained do not always provide a sufficiently high durability of the dies. The decrease in the durability of the dies caused by the overestimated resistance of the bridge is especially noticeable in the manufacture of simple forgings that do not have complex cavities filled by extrusion. Thus, industries need more durable tooling that can provide a large number of stamped parts, as well as save money on the development, design and manufacture of a new stamp. To this end, in this paper, an analysis of the application of an expanding burr groove in a tool is considered. Practical experience of how the tooling is worn out with the number of stampings, the geometry of the tooling is measured, an analysis is carried out, and a mathematical model of the behavior of wear based on the experiment is presented. The same equation was obtained using Excel, which indicates that the mathematical model was obtained correctly. In addition, the paper considers the value of individual parameters of the tool geometry on the overall tool life.
Development of an automated information system to support computational procedures for scheduling
Authors: Lopateeva O N
Published: June 2021

One of the most important problems of the high-quality organization of the educational process in a higher educational institution is the task of forming a high-quality educational timetable. This task is the main one in the activities of the dispatching service of the university. A well-designed timetable should ensure an even workload of student groups and faculty in the next semester. Therefore, much attention is paid to researching and analyzing the operation of existing alternative means, formalizing and solving problems of optimal scheduling. In this paper, it is assumed that the problem of drawing up an effective university schedule can be effectively solved within the framework of an automated information system. The tasks of optimizing the curriculum at the University are being solved, which will help to take into account the current sanitary and epidemiological rules and norms through the introduction of the information system “University Schedule”. The paper presents diagrams of use cases and a diagram of the databases of the future system. The goal is to improve the level and quality of the preparation of the curriculum through the introduction of the system “University Schedule”. The software tool created as a result of the project will be used directly by the teachers who are the people responsible for scheduling.
Analysis of the state and prospects of application of the plasma sputtering method for obtaining wear-resistant coatings
Authors: Bondareva G I , Toigambayev S K , Tambovsky N M
Published: June 2021

The analysis of the properties of structural materials according to the wear resistance criterion is carried out. The prospects for the application of the plasma spraying method for obtaining wear-resistant coatings are given. Practice shows that methods of increasing the wear resistance of parts by applying on them thin coatings of ceramic, cermet and other highly wear-resistant materials by surfacing, vapor deposition, detonation and plasma spraying are very effective.
Switching strategies for a multi-level inverter
Authors: Moldakhmetov S S , Ivel V P , Gerasimova Y V , Petrov P A , Kaliaskarov N B
Published: June 2021

The article examines the methods of switching the stages of a multi-level inverter in order to reduce the harmonic factor of the output voltage of the inverter. These methods use pulse-width modulation for switching, which is obtained by comparing a reference sinusoidal signal and a sequence of triangular pulses. The article describes the algorithms for obtaining the control sequence of pulses and simulates each of the strategies. The dependence of the nonlinear distortion factor on the frequency of the carrier wave for different switching strategies is obtained based on the simulation results. The influence of the LPF on the quality of the output voltage of the inverter is also investigated. In addition, an experimental study of a six-level inverter was carried out. The waveforms and spectrograms of the inverter were obtained using the Fluke 434-II electrical energy analyzer. The harmonics of the output voltage, which are distinguished by power from the entire spectrum, were identified.
Investigation on pitting resistance of Sn-containing ferritic stainless steel with solution simulation method
Authors: Tan Yanliang , Sun Yangting , Lei Longlin , Liu Yuanyuan , Li Jin , Jiang Yiming
Published: June 2021

In this study, Sn2+ solution simulation method is used to investigate the effect of Sn on pitting corrosion behavior of tin-containing ferritic stainless steel 430LX. It is found that the correlation between Epit and [Sn2+] is opposite to the correlation between critical potential temperature (CPT) and [Sn2+]. After potentiostatic polarization at a specific potential, the correlations become the same. The CPT experiment after a series of potentiostatic steps proves that Sn2+ exhibits positive influence only when the pH and potential is within a certain range. All the complicated phenomena can be explained by the under-potential deposition mechanism. SnO2 passivation film that enhances the corrosion resistance is only produced when under-potential deposition occurs.