bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the hot-deformed powder materials splicing surfaces’ quantitative characteristics
Authors: Goncharova T V , Bandura Yu N , Pashyan D A , Prous N G , Sukhomlinova V V 
Published: September 2020

Abstract
This article presents an experimental determination of the powder materials splicing surfaces’ quantitative characteristics obtained by hot processing.
This study analyzes the hot deformed powder material’s microstructures. We consider what changes the powder grains have undergone and what are the single crystals of different sizes, a certain configuration and color, as well as the crystallographic planes’ direction with respect to the thin section plane. In the course of the work, spheroidization of particles and their coagulation due to the absorption of small particles by large particles have been observed.
The influence of the initial particles’ size on the structure formation of powder alloys by using the homogenization features during sintering has also been investigated. The deformation character of the porous steel particles’ material compacts from two types of a mixture based on coarse and fine iron powder with different porosity is considered. As a result, after sintering, an increase in semi-finished products and a corresponding increase in porosity were observed. In this case, the effect nature of the dependence on the porosity of samples of powders of various sizes on plastic deformation is traced on thin sections of the porous semi-finished products. With a greater degree of compaction, the activation of the surfaces collapsing during hot stamping of pores and their rapid coalescence after reaching physical contact are detected.
The work revealed that the investigated non-porous hot-deformed steel is almost uniform in structure due to the complete deformation of all particles of various sizes original iron powder. The clear boundaries of the particles’ coalescence surfaces on the studied samples are traced.
In the course of this study, certain dependences of the splicing quality on interparticle contact surfaces during hot pressure treatment of powder semi-finished products and the properties of the obtained hot-deformed powder materials on the considered technological parameters [1, 2], for example, such as the particles’ size, determining the interparticle splicing surfaces boundaries length, differences in the mixture particles’ deformability, leading to a decrease in the volume of material deformed during hot processing pouring powder semi-finished products.
Constructing a transformation curve of the age resistance coefficient
Authors: Matseevich T A , Korolev E V , Askadsky A A 
Published: September 2020

Abstract
One of the possible approaches to the analysis of the materials’ age resistance coefficient dependence physical mechanism is proposed. The material’s durability at constant voltage is described using the Zhurkov equation and at alternating voltage it is described using the Bailey criterion. Under the action of small deformations on the material, its structure is ordered, which is expressed in a decrease the structurally sensitive coefficient value in the Zhurkov equation. This leads to an increase in durability by 20%. The resistance coefficient dependence is of an extreme character and can be maximum observed at the time to failure lg tp
≈ 2 (sec).
A chemical reaction model in a porous medium
Authors: Kuzmina L I , Osipov Yu V 
Published: September 2020

Abstract
Chemical reactions in a porous medium are found in many natural phenomena and technological processes. Reactive substances dissolved in groundwater can significantly change the soil strength. The precipitate formed as a result of the reaction changes the porous medium structure and affects the porosity and permeability. A one-dimensional model of the reaction of two reagents in a homogeneous porous medium with a linear reaction function is considered. The model includes the mass balance equations of each reagent and precipitate, and the kinetic equation of precipitate growth. It is assumed that the precipitate is stationary and the growth rate of the precipitate is proportional to the reagents’ concentration. A carrier fluid with constant concentration reagents is injected at the empty porous medium entrance. The reaction front moves in a porous medium at a constant speed. The exact solution to the problem is constructed by eliminating the unknown functions and lowering the equations’ order. A Riemann invariant that relates the concentration of sediment and reagents to the system’s characteristics was found. The reaction’s numerical simulation is performed. It is shown that, for a long time, the reagents’ concentrations and the precipitate tend to final limit values. Sediment profiles always decrease monotonously, and the type of the profiles’ convexity changes.
Improving the economic and operational reliability of the designed structures by improving the acoustic methods for diagnosing invisible material microdefects
Authors: Arshinov G A 
Published: September 2020

Annotation
The study aimed at increasing the economic and operational reliability of various designed building structures, improving non-destructive acoustic methods for detecting hidden microdefects in the materials used has been carried out. Construction, water, oil, gas pipelines must have the strength to ensure the trouble-free operation during the entire period of their operation, which determines the economic and operational reliability of structures. Strength can be significantly reduced if the latent microdefects are available in the material. In the field of such structural disturbances, material destruction, leading to loss of stability and bearing capacity of structural elements, accompanied by huge economic losses, environmental degradation and, in the worst case, human losses can develop. Therefore, it is necessary to improve the non-destructive acoustic methods for detecting latent microdefects. The mathematically refined models that describe the propagation of nonlinear deformation waves in thin-walled structural elements should be constructed for this. This is possible if the real physical and mechanical parameters, leading to more accurate characteristics of the deformation waves required for acoustic methods of the materials’ defectoscopy are taken into account. Such models include nonlinear mathematical models describing the propagation of deformation waves in rods and cylindrical shells, when the real hereditary properties of the material, the possibility of developing large deformations in them, and the effects lost in the framework of models that consider only the linearly elastic properties of structural elements are taken into account. Such a simplification causes unacceptable errors in the calculation of wave parameters and, accordingly, gives far-from-truth results of an acoustic study of the presence of invisible microdefects in the material of thin-walled structural elements that weaken their strength, and the economic and operational reliability of the designed structures and pipelines depends on it.
Algorithms for creating ruled surfaces according to various initial conditions
Authors: Zamyatin A V , Zamyatina E A , Sopchak N A 
Published: September 2020

Abstract
The article considers the algorithms for creating the ruled surfaces according to various initial conditions. Ruled surfaces are widely used in the development of technical objects, building structures, surfaces of road dumps, dams, etc. This is due to the manufacturability of such surfaces’ production. They can consist of rectilinear elements from various materials widely produced by modern industry. A lot of research is devoted to the development of algorithms for creating various types of the ruled surfaces. But most of them consider certain types of surfaces. In this paper, an attempt to create the most general algorithm for creating various types of the ruled surfaces is made. This will significantly expand the range of the ruled surfaces used in practical problems. The algorithms are implemented using the Object ARX technology for the AutoCAD system, which can greatly simplify the development, while using the extensive capabilities of AutoCAD. The algorithms developed in the article can be applied in the design tasks of various objects using ruled surfaces, as well as for developing the new types of ruled surfaces and studying their properties.
The educational organizations buildings and infrastructure health indicators’ monitoring by means of information systems
Authors: Basina N I , Pozharskaya E N , Popova S L , Rybalka Yu A 
Published: September 2020

Abstract
The development of computerized monitoring systems for the educational environment health-saving indicators is currently one of the most urgent tasks of pedagogical research. The article presents the experience of using the information system developed by the Don State Technical University and used to conduct the monitoring studies in 1210 educational institutions of the Rostov region. The information system for monitoring the education sector includes monitoring the indicators of the educational organizations’ property complex, the technical condition of the school building and the institutions’ visual environment design. The information system used in the Rostov Region is the first computerized system for monitoring the environment of educational institutions in the Russian Federation, which allows automatic control of the environmental factors for students and institutions’ property complex technical re-equipment optimization to ensure the health activities of schools throughout the region.
A new generation rice card design for organic rice farming
Authors: Vladimirov S A , Safranova T I , Prikhodko I A 
Published: September 2020

Abstract
The article proposes the construction of a new generation rice card. The results of a new generation rice card’s construction and operation in “Agrofirm Achuyevskaya” LLC in the Slavyansk region of the Krasnodar Territory are presented. This map makes it possible to highly efficiently control the groundwater level, which, in turn, allows to maintain the required parameters of soil moisture with the necessary and sufficient accuracy. A mathematical model to reduce the price of rice irrigation system construction has been developed, based on the integrated approach to the managerial decisions’ formation in the process of choosing the best option for the construction of an ameliorative system with predicted system’s operational parameters. It helps to quantify the influence strength and direction of the factors taken into account, to perform the multivariate forecast calculations based on the resources available at the construction time, scientific and technical level, construction technologies and materials. The economic effect of this rice map introduction made it possible to increase the yield of green mass of alfalfa to 650 c / ha, and corn to 720 c / ha. An increase in rice crop and the associated rice crop rotation was obtained. The decrease in groundwater levels has improved the ecological and reclamation condition of the rice fields’ soils. Optimization of the managerial decision-making process during the irrigation system construction allowed to reduce the amount of labor costs by 5%, energy resources by 20%. The increase in rice yield amounted to 15%, while reducing its cost by 5%.
Improving design solutions for the organization of construction production and the construction site equipment taking into account environmental safety during the reconstruction of facilities
Authors: Manzhilevskaya S E , Petrenko L K , Azarov V N 
Published: September 2020

Abstract
The designing process of the work organization for the buildings’ reconstruction has a number of features, such as the cramped conditions, tight deadlines, increased danger of work, etc. The design solutions’ development for the reconstruction work organization in any case should not lower the safety level for the construction workers and personnel of the reconstruction object, as well as damage the environment, in particular, air pollution by the dust particles from the construction processes, therefore, work execution projects should take into account the organizational and technological measures for labor protection and environmental safety of the territory where the reconstruction works are carried out. Environmental management included in the reconstruction of facilities should cover all the time both the space of the construction site and the processes organization that can minimize harm to the neighboring territory. This article discusses the measures to implement environmental monitoring in the work schedule at the construction site and construction equipment with cost-effective measures to combat the air pollution. The introduction of economically viable means of combating air pollution into design solutions, as well as the construction production effective organization, reducing the environmental burden on the territory, will allow the contractor to increase its competitive advantage when participating in tenders and determining the contractual price for the building reconstruction. The choice of cost-effective protective measures can save the costs, subsequently determining the profit of reconstruction work.
The Amur region volumes housing theoretical substantiation and forecasting
Authors: Aksenov A A , Shvydenko N V , Aksenova E G , Meshcheryakov S V 
Published: September 2020

Abstract
The article substantiates the need to determine the target volumes of housing construction in the Amur Region, taking into account the investment development attractiveness, the regional authorities’ policy, the land resources’ availability, engineering networks, the availability of building materials under various scenarios of economic development. The work involves a medium-term forecasting model for the regional housing market development with a 3-year planning horizon. The problem in obtaining quantitative estimates of market development (the price ratio, housing demand and supply) when changing the planned volume of housing commissioning and macroeconomic indicators has been solved. The data obtained as a result of the study can be used in developing the socio-economic policy of the Federation subject, forming a regional budget for the planning period, developing and implementing programs to provide affordable and comfortable housing for the population and the housing development in the region. The forecasting results on the Rostov Region and the Stavropol Territory examples were tested by the authors and reported in the framework of the International Scientific and Technical Conferences “Construction and Architecture: Theory and Practice of Industry Development” (CATPID-2018, October 8-12, 2018, Nalchik) and “Construction and architecture: theory and practice of innovative development” (CATPID-2019, October 1-5, 2019, Kislovodsk).
The monolithic buildings complex renovation’s organizational and technological model creation
Authors: Topchiy D V , Bolotova A S 
Published: September 2020

Abstract
Reliability and quality of monolithic construction works are determined by analyzing the system of preparing certain technological operations for implementation, establishing and ensuring the order, sequence and time schedule of works, and all types of resources supply. Periodic inspections of compliance with construction norms and regulations are held in the course of construction and erection works. As a follow-up on such inspections, the prescriptive orders on the detected nonconformities rectification and the violations within a specified time limit are issued. There is no provision for the time consumed by the corrective action in the calendar plan, and consequently the actual duration of construction as often as not exceeds the scheduled term to a great extent. In this connection, there is a task of assessing the level of the violations’ impact on the functioning efficiency and the production processes organizational quality. This paper explains how to create a proper database model to account for the defects and irregularities in monolithic construction and the details specifications of the technical failures impacting the organizational and technological construction reliability. The information technology use enables to calculate the various performance indicators quickly so as to streamline the defect and failure detection procedures adhered to by a contractor. The specialists in the field of risk analysis and assessment, experts and insurance companies, as well as the organizations conducting the assessment can use the methods described herein.
The influence of the technological and organizational factors on the construction process
Authors: Zilberova I Yu , Petrov K S , Neama Mohsen Al Fatla Abdullah 
Published: September 2020

Abstract
The article identifies the groups of factors that influence the process of building construction. The influence of the buildings’ construction specifics was taken into account. It was established that the necessary and sufficient for assessing the specifics of building construction issue is to take into account the factors that have the most significant impact, namely: the effect of construction site tightness; the factors complicating the structures’ transport; the factors complicating the structures’ enlarged assembly; the factors complicating the structures’ installation; the factors of production technology; the factors describing the construction planning.
Assessment and quality management of construction and installation works
Authors: Kuleshov I V 
Published: September 2020

Abstract
The work is devoted to the study of procedures for assessing the quality of construction and installation works. It is emphasized that there are significant differences in the parameters for assessing the state of an object and a process. When the process is flowing, it most often requires smoothness, the absence of spasmodic changes. Violation of these requirements affects the technological process final result - the finished product’s quality. It was revealed that the quality of the process can be determined by decomposing it into the operations and evaluating deviations in synchronization, coordination, technological modes and the costs of their implementation. However, the sequentially carried out processes, as follows from the theory of metasystems, can be evaluated by the readiness of the next operation. In this regard, the task of optimal availability control is further posed and solved.
Innovative technologies in on-line construction production management
Authors: Pobegailov O A , Zhdanov A N , Rodionov A A 
Published: September 2020

Abstract
The article considers the problem of using on-line programming and management programs in the organization and construction technology. The introduction substantiates the importance and significance of the on-line construction management problem, reports on the universal model development of such management. The methods and study section give an idea of the on-line construction management methods. A visual diagram of the control model is proposed. The results and discussion section explore the prospects for using the programs based on this technology. The application areas of innovative software in construction are proposed. A review of such systems’ real application examples in the large construction companies’ practice is given. In conclusion, it is concluded that there is a significant reduction in human factors to ensure high quality construction, reducing time and labor costs when applying the proposed method of construction management and the merits of the model developed by the authors.
The mechanism of the construction enterprise’s strategic planning
Authors: Nebritov B N 
Published: September 2020

Abstract
The minimalism of the construction enterprise’s strategic planning, which meets the industry specifics. The main components of such a mechanism and their relationship are highlighted. The structural mechanisms are the blocks; the analytical mechanisms are target, strategic. The contents of the blocks are disclosed. The strategic planning mechanism is presented as a defining part of a unified management system for the construction organization activities, which determines the desired state of the control object and forms a program for achieving the goals. Strategic planning is considered as a process, the initial stage of which is the organization’s mission formation, conducting marketing research, developing goals and strategies, determining the desired parameters of the firm’s “order portfolio” dictated by the strategic settings. Within the framework of studies related to the strategic planning mechanism, the solutions to a number of problems published in the scientific publishing houses are proposed. During the studies, the key concepts and directions of the strategic planning are clarified, the methods of domestic and foreign authors that define the strategic planning processes are described. The proposed strategic planning mechanism activities of the construction company provides an opportunity to systematically approach the issues of finding the ways to achieve the well-being of the company in the short and long term.
Modern directions of low-rise housing construction development in the world: economic and technological aspect
Authors: Sekisov A , Ovchinnikova S , Grebneva V , Chernyshova M 
Published: September 2020

Abstract
Today, all over the world, the focus is on the use of the new technologies that would significantly improve the construction quality. The paper considers the low-rise construction development as a whole, analyzes one of the most promising areas of architectural and construction development in the world - modular construction, explores all the positive and negative aspects of modular buildings.
Updating the algorithm for processing laser scanning data using linear objects as an example
Authors: Gura D A , Pavlyukova A P , Solodunov A A 
Published: September 2020

Abstract
An increased specification degree concerning the received information about the object as one of the three-dimensional laser scanning technology’s main advantages is determined in the article according to the results analyzes of the Russian and foreign sources. Information redundancy of data at the stage of their processing can be considered as a disadvantage. This is illustrated in the article by the example of processing laser scanning data in the Credo 3D Scan program for the purpose of monitoring the air routes status. In the case under consideration, it was necessary to determine the deflection of the air routes wires over a point cloud. Before directly measuring the deflection, it is necessary to follow the procedure for processing the raw data described in the article. One of the algorithm stages is the automated search for supports and wires provided for the Credo 3D Scan program. It was found that the team accelerates the search for wires among an array of other objects. However, there is no command to calculate the numerical value of the wire deflection, that is why it is necessary to measure the distance from the points corresponding to the Earth’s surface to the lower point of each wire manually. It has been determined that the geoinformation data operative collection task has been generally resolved, while the process of their processing requires optimization. To do this, it is necessary to improve the “Power Transmission Lines Recognition” function by adding a function for automated deflection detection with visualization of each wire given value in the inscription form both in a three-dimensional model and in plan using a conventional symbol.