bluuebunny/crossref_metadata_2025 huggingface dataset:
Artificial intelligence technologies to identify similar objects and formalization of inference rules
Authors: Yusupova N I , Smetanina O N , Yu Sazonova E , Agadullina A I
Published: March 2021

Analysis of data accumulated during the activities of the enterprise may be applied for creating novel business models and more efficient use of information resources. Specific requirements for analysis of data in socio-economic areas entail the need to develop or select the required tools and methods. This article considers identification of implicit knowledge on a complex of historical and operational data. The task statement and the methodology of solution are given. Data mining technologies are applied for identifying hidden common factors in data. Interpretation of the results, formalization of knowledge, formation of the knowledge base and use of the inference mechanism allow us to organize decision support. As an example, the task of personnel selection is considered. The choice of certain factors that are significant for each enterprise, which are the basis for the selection of personnel, will make it possible to spread the solution method for enterprises where strict requirements for information security are imposed. An analysis of decision-making support research in this area, is conducted with the use of artificial intelligence technology. Neural network technologies for data analysis are proposed to be used by the authors.
A Review of Smart Off-Grid Power Systems Optimization Models for the Oil and Gas Industry
Authors: Fedorenko V V , Samoylenko V V , Samoylenko I V , Dimitriadi Yu K
Published: March 2021

The article discusses current issues of using alternative energy sources for electricity supply of consumers in the oil and gas industry. Examples of off-grid power systems used for the electrification of different facilities of oil and gas production are shown. This paper introduces a review of mathematical optimization models of modes in micro-energy systems with different distributed generation resources. Optimization methods based on mathematical programming in game theory are studied in details. It is concluded that the use of adaptive-game modelling is perspective in solving optimization problems.
General approach to automating the process of responding to computer security incidents
Authors: Pilitsky A V , Prokopenko O E , Halizev V N
Published: March 2021

The article considers the process of responding to information security incidents as a cyclical process divided into several stages. The main approaches to automating response processes are presented, as well as cases in which automation is not effective.
A version of the voting protocol based on blockchain technology
Authors: Killer V N , Borshevnikov A E , Soldatov K S
Published: March 2021

The paper describes a generalized version of the voting protocol based on blockchain technology. The analysis of the proposed protocol is also carried out. The proposed protocol is based on such cryptographic primitives as digital signatures, asymmetric ciphers, and zero knowledge proof protocol. Safety analysis was carried out using the AVISPA software package. Anonymity was analyzed separately as part of this protocol by analyzing differential privacy.
Application of face recognition technologies in access control and management systems
Authors: Marenkov A N , Gelagaev T M , Yu Kuznetsova V
Published: March 2021

The article shows the relevance of the widespread use of computer vision technology on the example of face recognition as part of the access control and management system. The scheme of access control implementation with face recognition technology is described. The use of this technology makes it possible to increase the level of information security of enterprises and, as a consequence, reduce the possible financial damage from the implementation of attacks on their assets from illegitimate penetration into the protected area through the access control system using passes of legal users.
Software tools communication process models for Modbus TCP/RTU for diagnostics using machine learning approaches
Authors: Sosnovskiy Yuri , Lapina Maria , Lapin Vitalii , Mecella Massimo
Published: March 2021

The work proposes a software solution to the problem of generating data sets that simulate information control processes in microprocessor control systems and automated process control system (APCS) at the lower and middle levels using the Modbus TCP/RTU protocol. Such datasets (dumps) with controlled characteristics, records of computer attacks and information and technical impact (ITI) of various types are advisable to use for training spacecraft recognition systems based on artificial intelligence and machine learning. Also, due to the possibility of introducing records of any types of attacks, it is possible to test intrusion detection systems, intelligent sensors of the spacecraft for their efficiency. The analysis of the existing software, the possibility of its combination to solve the problem is given. The structure of a data transmission system (DTS) fragment of a real VCE ACS and its representation as a set of device identifiers, addresses, registers and data types. The model of communication processes Modbus TCP/RTU was built, the results of modeling are presented. The features and limitations of the software used are discussed, as well as the prospects for improving the model.
Effect of Carbon Black on Epoxide Resin ED-20 Properties
Authors: Fedorov Y Y , Vasiliev S V , Savvina A V
Published: March 2021

This article describes the effect of carbon black P505 on the bending strength of epoxy resin ED-20. Studies of the effect of the filler concentration of carbon black P505 on the bending characteristics of the epoxy resin composite ED-20 were carried out at temperatures of +23 and -60 °C. Three times decrease in flexural strength and four times in deformability has been observed. When test temperature drops to -60°C, indicators of strength and deformation at failure remain unchanged.
The Use of Crumb Rubber-Based Composite Materials in the Road Pavement
Authors: Korochkin A V
Published: March 2021

The paper describes examples of improving the asphalt mix properties with modifiers, the main component of which is recycled rubber. The experience of foreign countries in the construction and operation of roads coated with rubber-modified asphalt concrete is shown. The use of modified asphalt concrete in the Russian Federation and the reasons limiting the use of new technologies in road construction in our country have been analyzed. The issue of the possibility of building roads with the hard pavement, in which coatings of crumb rubber-based composite materials are used as a wearing course, is considered in detail. Conclusions are drawn about the need to arrange the collection of rubber wastes and the creation of enterprises to process them into the required raw materials and perform studies to evaluate the use of road coatings containing recycled rubber-based composite materials in road construction.
On the Issue of Forming Construction Machinery Sets When Performing Construction and Installation Work
Authors: Sinenko S , Poznakhirko T
Published: March 2021

A large scope of work, tight deadlines, and the need to use various construction equipment suppose its widespread use. This will allow improving construction efficiency. Machinery sets and complexes support various process flows. Machinery sets serve individual lines (simple workflows). Machinery complexes support specialized flows being complex processes (work) and object flows – work packages.

The performance of the leading machine in the complex (set) should ensure the fulfillment of the scope of work within the deadlines and with the pace specified. When choosing and integrating machines, the main process parameter is the performance of the leading machine or machinery complex. Also, when choosing machines, their design parameters should be considered. The study proposes tools to form the construction machinery sets. They are illustrated with specific examples.
Key Factors Influencing Formation of Modern Comfortable City Residential Environment
Authors: Generalov V , Generalova E
Published: March 2021

The problems of creating a comfortable living environment are considered on the example of the city of Samara in the areas with multi-storey residential buildings, the construction of which was completed 5-30 years ago. The article gives the assessment of opinions based on the analysis of residents’ survey results concerning the ideas of a “comfortable living environment”, “comfort of living” in a residential building, a courtyard and a district areas. It is concluded that the tasks of creating a comfortable living environment should be solved by professionals working in this field. At that the leading role should be given to architects and designers. There is no doubt that the assessment of the created environment belongs to the residents of buildings and urban areas in the mode of their permanent survey.
Stress-Strain State of Rockfill Dam Concrete Face Due to Temperature Impact During Reservoir Impoundment
Authors: Sainov M P
Published: March 2021

During the reservoir initial impoundment, a rockfill dam concrete face maybe subject to intensive thermal effect. Thermal stresses may considerably change the concrete face stress-strain state (SSS) and induce crack formation in it. With the aid of numerical modeling the author studied the concrete face thermal stresses and deformations for three alternatives of temperature distribution along the face thickness. It was shown that the character of temperature distribution plays an important role in formation of the face thermo-stressed state. At uniform cooling (or heating) due to rockfill low stiffness the face can partially compensate temperature deformations and thermal stresses. Thermal stresses makeup only 15÷30% of the potential ones in constrained conditions. More dangerous is the case of non-uniform distribution of stresses: it causes the face bending deformations. Stresses from bending deformations actually are not compensated. Combination of linear and bending deformations causes high thermal stresses in the face, which may become the reason of crack formation in the face. To provide the face favorable thermo-stressed state without impact from bending deformation sit is necessary to execute the impoundment of the reservoir during a long period. At designing rockfill dams with concrete faces it is necessary to take into account the fact that the less is the face thickness the more is the value of thermal stresses caused by uniform cooling (heating). It is reasonable to revise the recommendations for assigning the face thickness.
Nanofiltration to Purify Drinking Water from Cyanobacteria and Microcystins in Water Supply Systems
Authors: Selezneva A V , Seleznev V A , Sayriddinov S Sh
Published: March 2021

The pollution of a surface water supply source (Kuibyshev reservoir) with cyanobacterial metabolites under the conditions of the increased biogenic load has been estimated. During the period of mass growth of Cyanobacteria, the reservoir water quality deteriorates in some indicators, including the smell, taste, and content of organic and toxic substances. Among the wide range of cyanotoxins, microcystin-LR, the permissible concentration of which in drinking water should not exceed 1 μg/dm3, poses the greatest threat to the population. Global warming creates favorable conditions for the rapid growth of Cyanobacteria, therefore, the issue of providing the population with high-quality drinking water will further become aggravated.

Conventional process lines at municipal water treatment plants are ineffective in removing intracellular and extracellular cyanotoxins. The best and safest barrier against the ingress of cyanotoxins into drinking water can be membrane technologies that allow ultrafiltration of bacterial cells without mechanical damage and nanofiltration of cyanotoxins dissolved in water.
Inclusiveness in Clothing Design
Authors: Zaytseva T A , Koroleva L A , Slesarchuk I A
Published: March 2021

The article discusses the development of inclusive design in clothing, designed to ensure versatility, accessibility and compliance with modern fashion trends for different audiences. Based on the principles of an integrated approach to the design of inclusive clothing, the directions of implementation for the choice of design solutions have been developed. The result of the research was the development of new patentable functional and constructive solutions for models of inclusive women’s waistcoats, which make it possible to use various groups of consumers, for example, women with atrophy of the lower extremities and moving in a wheelchair.
The Concept of Restoring the Historical Development of the Pristan Area in Harbin
Authors: Lava D A
Published: March 2021

The work is devoted to the restoration of the historic environment of the city of Harbin. We are talking in this article about the preserved buildings in the Pristan area, which is the main commercial, the industrial and economic centre of the city. Central (Chinese) street belongs to the sights of the area. A large number of architectural monuments – buildings of Russian architects from 1898-1940 – concentrated on it. The historical building on the streets adjoining it has been preserved fragmentarily. The buildings are in a ruined state and require repair and restoration work. The concept of restoring a group of buildings located on one of the historic streets of Harbin – Yamskaya St., discussed in detail in this article. Space-planning and stylistic features of the objects identified in the work. The emphasis is on the need to restore the lost parts, drawings and photographs are given in the article.
Modelling of Optimization of Conditions for the Transition of a Megalopolis to a Cluster Group with the Best Quality of Life Indicators
Authors: Ershova S A , Orlovskaya T N
Published: March 2021

The article presents the results of a cluster assessment of Russian megalopolises based on the indicators of the human development index and the quality of life of residents. Based on the calculated data of cluster analysis, a model for optimizing the conditions for the transition of a megalopolis to a higher-ranking cluster group has been developed. The optimization model uses the most significant indicators for the city’s economy: the income index, per capita income, and the subsistence minimum. According to the modelling results, there have been composed the regression equations for the HDI of the megalopolis and regression equations for the multidimensional average of socio-economic indicators of the megalopolis. The authors have calculated the indicators of growth factors necessary for the transition of a megalopolis to a higher-ranking cluster and compiled a forecast matrix for clustering megalopolises with changed factors.
Research on the Physical and Mechanical Characteristics of Stabilized Soil Subgrade of the Central Yakutia
Authors: Nikolaeva G O
Published: March 2021

This work presents the results of research four soil samples were taken from the streets of the Gorny District, also tested for compressive strength before and after water saturation and swelling and estimation of physical and mechanical properties of soil stabilized by cement addition. The main aim of this paper was to estimate the optimal cement and water content in soil. The results of a study of the influence of the degree of compaction and temperature on the coefficient of moisture conductivity of thawed and frozen soils are presented. Plots of the dependence of the coefficient of moisture conductivity (KW) are constructed and the corresponding conclusions are drawn.
The Image of the Urban Environment in the Context of Tourist Attractivity of Vladivostok
Authors: Metlyaeva T V , Falko L Yu , Klochko I L
Published: March 2021

This article deals with the factors that make the urban environment attractive to visitors from Russia and abroad in the context of developing internal and external tourism in Russia. The research relies on the marketing and axiological approaches to determine the notion of urban environment image.

Its results show that the positive image and tourist attractivity of Vladivostok is determined by its history, unique geographic location, abundant natural resources, and stunning landscapes. The development of the urban environment in Vladivostok does not correspond with its tourist potential and tourist attractiveness. The image of Vladivostok is undermined by the uncomfortable and unsafe urban environment (bad street lighting, poor condition of roads and stairs), low quality of service, high prices, environmental problems (air and beach pollution, lack of green spaces, low water quality).

The practical results of this research work include recommendations on the improvement of the image of the city and its tourism attractivity (especially in winter).
Elements of Economic and Visual Modeling as a Tool for Managing the Life Cycle of Construction Projects
Authors: Kazaryan R , Andreeva P , Galaeva N
Published: March 2021

The methods of visual modeling are considered, which allows effective implementation of construction organization projects. The economic and visual model is the elemental base of infographic modeling systems, which contributes to making the most rational organizational and technological decisions. The aim of this work is to study the efficiency potential of the economic and visual model, as well as the possibility of reducing all kinds of costs when developing projects by introducing economic and visual modeling. Some aspects of the current experience of using this model are studied. Based on a literary analysis of the work of economic and visual modeling, a comparative analysis of domestic and foreign authors is carried out. Based on the information model (BIM), the optimal organizational and technological solution is selected. As a result of the analytical study, materials and data on the practical application of the economic and visual model in the territory of the Russian Federation were studied. A summary table is provided. Based on the results of a theoretical study, conclusions are drawn about the need to form information methods for modeling the organization of construction production.
Influence of Base Deformations on Stability of Frame-Rod Structural Systems
Authors: Emelyanov S G , Dubrakov S V
Published: March 2021

Purpose of research. Investigation of changes in the critical parameters of stability of structural system elements, taking into account the geometric nonlinearity associated with the deformation of the “building-base” system. Methods. Under the influence of geometric nonlinearity associated with joint deformations of the “building-base” system, the longitudinal force of some racks ceases to contribute to the bifurcation of the rod [5-7, 9, 12, 13]. Therefore, at a certain value of strain ΔS, a single rack can go from active bifurcation to passive, which will cause structural and change the critical stability parameters of the entire system under consideration. This situation can lead to irreversible deformations and destruction of both the individual load-bearing element and the entire building. Results. Let’s consider a core structural system, the Central element of which is loaded with The RCR force, and the extreme elements are loaded with the RCR forces. (Fig. 1A). We find the critical parameters of the stability of the specified frame and the form of bifurcation of its compressed struts using the given equations depending on the load application coefficient α before and after stabilization of the base precipitation.

Let’s analyze the bifurcation pattern of the frame elements before and after the base deformation at the maximum precipitation of the second and third pillars at the value of the load application coefficient α=0.8 at a time when the base deformations have not stabilized, the left and right pillars lose their stability passively, the Central one-actively (Fig. 3A). Analysis of the obtained calculation results showed that when the second column precipitation is 2.4 cm or more, the character of the entire structural bifurcation system changes. Conclusion. During the theoretical research, the behavior of the elements of the frame in question during the loss of stability before and after the occurrence of an emergency situation associated with the subsidence of the base of the supports of the first and second pillars was analyzed. The dependence of the critical value of the precipitation and the difference in precipitation on the load application coefficient α for the second and third pillars of the frame was derived. Analysis of the obtained calculation results showed that when the second column precipitation is 2.4 cm or more, the character of the entire structural bifurcation system changes.
Optimization of the Vehicle Movement Modes
Authors: Kudryavcev E , Mollinedo D
Published: March 2021

Article describe process of optimization of vehicle movement modes. This task belongs to the class of combinatorial tasks. When in our task we take only six sector of the road and five transfers in each sector then number of the possible vehicle movement modes will be 18750. For decision of the task we use equation recurrence of Bellman, according to which the optimal choice has the property of independently from the initial state and solutions at the initial moment the subsequent solutions must be optimal. This allows to replace search of extremum of a function with many variables by search of extremum of a function with one variable. For optimization we use Mathcad system. The proposed procedures of optimization of vehicle movement modes allow to reduce time and costs of such calculations at least in several hundred times and effectively to carry out researches in any usage mode and exploitation of vehicles, providing good visual presentation of received results.
Characteristic Features of Urban-Planning Solution of “Udarnik” Health Resort in Zheleznovodsk
Authors: Sidorenko N R , Tokarev A G
Published: March 2021

Already during the first years of the Soviet regime the government prescribed a line of improvement concerning the state of health resort areas of the country in order to provide proper recreation to the working population. In this connection a vast building program of new health resorts, medical and recreation centers is launched in the towns of the Caucasian Mineral Waters; the development of those took into consideration two essential peculiarities of the territory – its mountain terrain and a specific structure of historic development. The case in point of such design is the building of “Udamik” health resort in Zheleznovodsk; in its urban-planning solutions the authors of the construction, I. A. Fomin and M. I. Roslavlev, managed to reflect influence of the surrounding low-rise residential development and considerable changes in elevation and irregular terrain of the plot.
Project Education in Design. Innovations or Traditions?
Authors: Stratonova L M , Kvashnina O V , Gilmutdinova E V
Published: March 2021

The importance of the given article results from active new teaching technologies integrating into the educational system in Russia. The necessity for Russia’s education to shift to up-to-date forms is recognized by everybody in the scientific community. Prospects of project scenarios of acquiring knowledge are evident to everybody. Sooner or later, all persons involved, from professors to students, will have to solve these problems, but in practice, the problems are not so complicated as they seemed at the start of the reforms. Newest technologies in modern education and a historical experience of training specialist in architecture and art will make it possible to solve problems of creating scientific teams based on new cooperation principles. The objective of the given article is to focus the interest of colleagues of all areas of knowledge on the theory and practice of project education in leading scientific schools involved in training specialists in architecture, design, and culture. These areas of education possess a rich experience thanks to many generations of architects, designers, and artists working in decorative art, this experience produces amazing results. A new educational space that is being formed nowadays, puts forward a demand for multifunctional specialists, any experience being appreciated here. A method of solving the problem of shifting to project educational technologies in Russia was stated, among others, in the architectural and design education methodology. Being a work-through principle, project technologies concern all the subjects and meet the demands to form of a complete scope of competences of specialists in these aspects. This article propositions can result in a basis for new project education methods elaboration and fundamentally new educational medium formation. In the first place, these methods are directed to the problem to motivate creative search and form imaginative and project thinking. Nature as a source of inspiration, a factor of shape design and style, and actual problems of preserving it, can become a new content of many projects. A new attitude to the educational space as an integral body will support creating an ideal medium for interaction and development of all participants of the educational process on a permanent basis in future. That is a medium, really beautiful and comfortable for scientific and professional development and perfection.
A Study of a Comprehensive Quality Indicator of Multi-Storey Residential Buildings While the Indicators of the Groups Factors are Changing
Authors: Lapidus A , Shesterikova Y
Published: March 2021

The most significant eight parameters that affect the quality of a multi-story building object are identified. In the form of a regression model, a linear, quadratic, and general quadratic model are used. Based on the results of the studies, it was concluded that the most adequate model is the general quadratic model. The dependence of complex quality indicators of residential multi-storey buildings of the specific group of factors is studied. A three-dimensional surface graph of the regression equation is constructed based on the various groups of factors. A series of 6 dependencies in a graph describes the alternating effect of 2 groups of factors on changes in a comprehensive quality indicator.
Resources and Opportunities for the Functional and Spatial Development of the Kama Agglomeration
Authors: Dembich A , Zakirova Y , Latypova M
Published: March 2021

The main objectives of the study presented in the article are to study the prerequisites for the formation of the Kama agglomeration, to identify factors and trends in its spatial development, and to identify features of the formation of the urbanized framework of the territory. Strategic materials of socio-economic development of settlements that make up the agglomeration and documents of territorial planning are studied. A principal model of the functional and spatial structure of the Kama agglomeration is proposed.
Consideration of Temperature Stresses in the Calculation of Crack Formation in Concrete Massifs of Buildings
Authors: Sazonova S A , Nikolenko S D , Akamsina N V
Published: March 2021

Computer simulation of the thermal stress state of a concrete foundation slab of a building is considered. To simulate the thermal stress state, the specialized Midas Fea software package is used. The actual tensile stresses in concrete are compared with the maximum allowable values taking into account the equivalent age. It was established that the likelihood of cracking due to sudden changes in temperature is high, which entails the likelihood of destructive processes in concrete. Using the software package, calculations were made and graphs of the temperature changes in time at the control points were plotted, as well as the isofields of temperature distribution and crack formation coefficients over the volume of the considered array were graphically depicted and investigated. Based on the calculations and modeling of temperature processes in concrete, it is proposed to use surface thermal insulation or to reduce the initial temperature of the concrete mixture in order to reduce the heat transfer rate of the concrete surface.
Calculation of Crack Formation During the Thermal Stress State of Concrete Masses and Development of Measures to Improve the Operational Properties of Concrete
Authors: Nikolenko S D , Sazonova S A , Zvyagintseva A V
Published: March 2021

The modeling of the thermally stressed state of the building foundation slab is considered. The performed calculations took into account the occurrence of stresses as a result of heating the concrete mass during cement hydration. To simulate the thermal stress state, the specialized Midas Fea software package is used. In carrying out the research, materials from articles on the construction and examination of the current state of buildings and structures made of concrete and fiber-reinforced structures were used. At control points, diagrams of changes in temperatures, stresses, and crack formation coefficients in relation to the time of curing are obtained. The isopoles of temperature distribution and crack formation coefficients over the volume of the studied array are obtained. Measures have been developed to improve the operational properties of concrete, including engineering and technical recommendations to reduce the negative impact of temperature differences on the manufacturing process of concrete mixtures and foundations.
Individualization of Microclimate Air Conditioning Systems in Residential Premises
Authors: Rymarov A , Titkov D
Published: March 2021

Individualization of a person’s life is associated with the quality of the microclimate of the surrounding person in the room. Microclimate norms are associated with the satisfaction of about 75 % of people, however, 25 % is a variable that depends on the activity and characteristics of a person’s metabolism at any given time, as for the seemingly stable 75 %. The formation of engineering systems, taking into account the individual characteristics of a person, will make it possible to more economically spend energy resources and spend heat energy pointwise, taking into account the need for each person. When a person has an individual place at home, where a microclimate is created that is necessary for a specific person at any given moment in time. Changes in the climate surrounding the building must also be taken into account when forming the microclimate in the individual spaces of the building, taking into account the need for each individual person.
Profile Competencies for Training Welding Specialists in Higher Education Institutions
Authors: Korobtsov A S
Published: March 2021

The article presents a methodology that allows to substantiate professional competencies in the profile training of welding specialists in higher education institutions. The provisions of the methodology are based on professional and international standards. The substantiation of the number and essence of profile competencies is based on the process approach of quality management.
The Space of Buildings and Their Information Models as a Triad Structure
Authors: Losev K Yu , Chulkov VO
Published: March 2021

The article is devoted to an approach to the study and explanation of information processes of buildings and their information models over time, that is, in the course of their functioning: both during their life path and in the life cycle, when the physical part of a building ceases to exist, and information about its functioning is transferred using general data to create other buildings. Through the functionality of a building as a system, its commonality with cyberphysical systems is shown, and through the position on the position on the three-dimensional reflection in living nature, a tool for describing the space of buildings, structures and their information models is proposed in the form of a system categorical triad approach, supplemented by the position on the Ukhtomsky dominant, the position of category theory and the method of analogies. Using this infographic description of the subject area of buildings and their information models, you can create six basic and three derived results that are elements of the space of a cyberphysical system. It is possible to get a larger number of system elements through determining the results of the effects of results on each other. The presented systemic categorical triad approach based on infographic modeling does not depend on the initial number of parameters and the amount of data that are reduced to triads through monads and dyads and can be effectively investigated.
Modified Ceramics Based on the Pyrolysis Residue of Municipal Solid Waste
Authors: Kolibaba O B , Dolinin D A , Gusev E V
Published: March 2021

To successfully solve the relevant problem of recycling solid household waste (SHW) in Russia, it is necessary to move from its landfill disposal to industrial processing. A promising option is the pyrolysis of solid carbon-containing waste, which can significantly reduce the amount of waste, as well as obtain alternative types of energy. The use of products of solid household waste pyrolysis as a method of production of ceramics is proposed.

A new ceramic material was obtained where the solid residue of pyrolysis of an SHW mixture with average morphological composition was used as a structure-phase-forming additive. Chemical composition of the material, its average density, thermal conductivity and diffusivity, and specific heat capacity have been determined experimentally. It is recommended to use this ceramic material to manufacture building products for various purposes.
Features of the Power Work of Light Metal Structures
Authors: Alpatov V , Saharov A
Published: March 2021

Took into account experience of light metal constructions using in building. Paid attention to possible metal beams weight reducement ways. Interest to metal beams weight reducement appears, because they are widely used in modern building. Beams weight reducement is considered as an effective way of building spending reducement. The ways of reducing the material consumption of I-beams are formulated as manufacturing corrugated and perforated walls. Stress-strain state of corrugated beams numerical research results are shown. The results of solving the optimization task of finding the circular perforation geometry in the I-beam wall are presented. I-beam stress-strain state during bending under constrained torsion conditions research are presented. Made a conclusion about the efficiency of corrugated and perforated beams in comparison with traditional rolled beams. Concluded that it is necessary to take into account the stresses caused by the I-beam constrained torsion when the load adding eccentricity exceeds 15% of the flange width.
Examining Beam Oscillations in the Space of Technogenic and Seismic Impact Parameters (Part II)
Authors: Kulterbayev Kh P , Oshkhunov M M , Baragunova L A , Kabzhikhov A A , Bulanov S G
Published: March 2021

The proposed paper (Part II) is a continuation of another paper under the same name (Part I), published in this volume. Part II explores two types of forced oscillations: harmonic (polyharmonic) and random. The sources of oscillations are kinematic and dynamic effects which are concentrated on the boundaries and in the span. The mathematical problem of oscillations is presented as a boundary value problem from the basic equation in hyperbolic partial derivatives of the fourth order in spatial coordinates, of second order in time. The technical theory of bending oscillations of rods based on Bernoulli’s hypothesis is used. Practical conclusions have been made.
Tourism Planning of Rattan and Bamboo Villages in the Red River Delta, Applied to Thu Sy Craft Village, Hung Yen Province
Authors: Nguyen Huong T , Nguyen Thu H
Published: March 2021

Most of rural areas in the Red River Delta is home of traditional craft villages that have been established for hundreds of years with abundant cultural and historical values representing the culture of Viet Nam. Of which, traditional craft culture and other cultural heritages such as architecture, temples, landscapes, culinary culture, performing arts, festivals, etc. are precious values. They are valuable potentials for rural economy development in the increasingly rapid urbanization. By conducting field surveys of typical rattan and bamboo villages and analyzing documents, this discussion paper aims to assess the tourism development of traditional craft villages and their development potentials, then propose suitable structural models for tourism planning of rattan and bamboo weaving villages in the Red River Delta. The research results are applied in Thu Sy rattan and bamboo weaving village, Hung Yen province, Viet Nam.
Intergrating Building Information Modelling (BIM) and Tools with Green Building Certification System in Designing and Evaluating Water Efficiency of Green Building for Sustainable Buildings
Authors: Nguyen Thao P , Nguyen Viet-Anh , Pham Dong D , Do Hoang Q
Published: March 2021

Designing green buildings has become a common trend in many developed countries as a way to promote energy savings and environmental protection. In Viet Nam, the number of certified green buildings remains few, mainly applied LOTUS – the green building rating system introduced by the Vietnam Green Building Council in 2009. It is mainly due to the length of time it takes to design and evaluate green buildings. Applying the Building Information Modeling (BIM) in the design and evaluation of green buildings will address this shortcoming. The integrated BIM-Green Buildings solution kit efficiently provides the architects and engineers with a tool to make preliminary estimation of the green building scoring in term of water efficiency in their design phase; thus they can actively evaluate their performance against key green building criteria and accordingly adjust their designs to meet the criteria at the desired level. This software therefore saves designing time and facilitates the selection of suitable designs.
Solutions for Structural Planning of the Urban Green Corridor for Hanoi City
Authors: Tuyen Nguyen Van
Published: March 2021

Hanoi is the capital of the Socialist Republic of Viet Nam. It is also the political, economic and cultural center of the Red River Delta area and Viet Nam. Hanoi City is the first large urban center in Vietnam to adopt the Green Corridor model as part of the master plan approved in 2011, which is somewhat similar to the green belt model widely adopted in urban areas in the world. The green corridor for Hanoi includes “rural areas, systems of rivers, lakes, hills, natural forests, farming areas … strictly protected to provide logistics support for urban development, landscape protection and healthy urban environment”. The green corridor for Hanoi includes the entire suburban areas, which play a role in controlling the sprawling development of the central urban hub and occupy nearly 70% of the city’s land area. This solution also causes a lot of controversy on how the concept should be interpreted as the structural planning does not reflect natural conditions and there remain difficulties in the management of such a plan in practice. Using field surveys, graphic presentation and literature review, the article identified existing problems in development of a Green Corridor plan for Hanoi. Based on these problems, the article presented the concept, planning structural model and some solutions for management of the urban green corridor for Hanoi.
Adesione Additives for the Production of Asphalt Concrete with the Use of Waste in Building Ceramics
Authors: Yatsenko N D , Evforitsky A S , Kotenko N P , Popova L D
Published: March 2021

The possibility of using industrial waste is theoretically justified porcelain stoneware as an asphalt concrete filler. The influence of adhesive additives for bitumen bond BND (oil road bitumen) 60/90 with porcelain stoneware of various fractional composition has been established.
Research of the Purification Methods of Chrome-Containing Manufacturing Water
Authors: Porshina E G , Saimanova O G , Serpukhova E P
Published: March 2021

The article describes the most common current methods for treating industrial wastewater containing chromium compounds. Possible methods of recycling chromium-containing waste and difficulties associated with this process are identified, as well as increasing factors are noted. Concepts of electrocoagulation and reagent methods are presented, their advantages and disadvantages are noted. A process scheme for treatment of contaminated effluents of industrial enterprises is proposed, which provides for their release into the city drainage network. An example of a successful existing technology for recycling chromium-containing waste water is given. The most effective integrated method of treating industrial effluents is justified for industrial enterprises that have chromium-containing wastewater. It provides for the combination of the electrocoagulation method with the post-treatment of wastewater by the reagent method. As reagents, it was proposed to use barium chloride 2-aqueous and iron sulphate (II) 7-aqueous (iron sulfate). Comparative calculation of the required amount of reagents and its cost was made.
Properties of Concrete Modified by Ultrafine Cement Admixture
Authors: Egorov E S , Samchenko A V , Abramov M A
Published: March 2021

This article describes possibility using hydrated cement as additions for batching new concrete. Time of cement hydration was 2, 4 and 6 hours. Quantity of pre-hydrated cement for batching admixture was equal 5, 10, 15, 30% dry matter content in relation to cement for control mixture. Influence of addition on normal consistency, concrete unit weight and compression resistance was determined. Cement particles distributions of control and pre-hydrated specimens was studied. The article shown need for increasing water quantity to getting normal consistency which led to decreasing unit weight. As a result of adding hydrated cement particles an early strength increased with amount of admixture less than 10%. Received results were discussed according to cement hydrations mechanism.
Building Information Modeling for Sustainable Construction
Authors: Bukunova O , Bukunov A
Published: March 2021

The possibilities of building information modeling (BIM) for solving the problems of sustainable construction to improve the quality of construction of buildings, ensuring maximum comfort inside the premises at the expense of a minimum amount of resources are studied. The assessment of the possibility of BIM for solving the problems of sustainable construction for the conservation and Thrifty use of natural resources was carried out. The use of BIM for humanistic design is analyzed. The principle of reorganization of the last stage of the life cycle (LC) of a sustainable construction object for optimizing the LC of materials and components in construction based on BIM is studied. A scheme of the machine learning process for optimizing design based on BIM is proposed.
Airtightness of High-Rises in the North
Authors: Slobodchikov E , Haruzov D
Published: March 2021

For the Republic of Sakha (Yakutia), effective thermal insulation of buildings is imperative for human comfort and for reducing the leakage of heat through the envelope. To design such insulation, one needs to duly consider the microclimatic specifics in the context of an extreme continental climate. Climate-induced leakage of heat through the envelope results in heat and electricity waste; such leakage is non-acceptable by modern standards. Demand for energy-efficient housing is rising. Thus, improving the thermal insulation of structures is a relevant issue.
Top-Combustion Solid Fuel-Fired Boilers: Peculiarities of Combustion as Observed in-kind in the North
Authors: Slobodchikov E , Fedorov A
Published: March 2021

In the climate of the Republic of Sakha (Yakutia), it is important to have efficient and reliable heat sources to survive. This is why efficient standalone heat generators are becoming ever more popular. As of lately, Yakutia’s residents tend to prefer detached housing with individual heating. However, practical experience has shown that neither domestically made nor imported heat generators are suitable for the Republic’s cold climate. This statement is reinforced by their poor heating performance that does not match the manufacturers’ claims. Such performance is mainly due to failing flue-gas stacks, a phenomenon associated with the air-fuel equivalence ratio.
Visual Identity of Seaside City’s Cultural Landscape
Authors: Erysheva E , Moor V
Published: March 2021

The unification of modern cities is becoming a consequence of globalization. There is a leveling of their unique features: cultural, social and visual identity. A city without a bright expressed “face” - a recognizable visual image and stable semantic associations - inevitably loses its position in today’s highly competitive market. Urban identity is becoming one of the city’s competitive advantages in the context of globalization. The potential of urban identity lies in the possibility of forming a recognizable city, maintaining the true (authentic) urban meanings, the “spirit” of the city. In this regard, it is important to actualize the visual potential of the city, as well as the process of introducing unique visual components of the city’s cultural landscape into the concept of urban identity. The article examines the specifics of a maritime city’s urban identity, revealing the uniqueness of the city at the level of visual perception, which must be taken into account when elaborating a city development strategy.
Influence of Polycarboxylate Superplasticizer and Mineral Additives of Various Compositions on the Technological and Physical-Mechanical Properties of Cement Systems
Authors: Nizina T A , Balykov A S , Korovkin D I , Volodin V V
Published: March 2021

Management of the pore volume and the mineral-morphological state of the hardening system by modifying the cement stone with chemical and mineral additives introduced both separately and in complexes is considered to be one of the defining directions of concrete structure formation. The purpose of this study was to establish the regularities of the influence of mineral additives of various compositions (siliceous, aluminosilicate, sulfoaluminate, carbonate) and polycarboxylate superplasticizer on the technological and physical-mechanical properties of cement systems, with the identification of the most effective modifiers and their complexes. Based on the results of experimental studies, it was established that it is possible to obtain, on the basis of sulfoaluminate modifier, compositions with high technological parameters with a reduced content of expensive polycarboxylate plasticizer. It was found that the studied compositions with mineral additives differ in high rates of compressive strength gain of cement stone at the age of 3 and 7 days - 48÷69 and 71÷83% of the compressive strength at the age of 28 days, respectively. At the same time, in comparison with the reference composition without mineral additives, the relative compressive strength of the modified cement stone at the age of 28 days varies in the range from 0.9 to 1.2 relative units, which confirms the possibility of increasing the strength indicators of cement composites due to the use of optimal complexes of polycarboxylate superplasticizer and mineral additives of various compositions, in particular when using microcalcite, microsilica and sulfoaluminate modifier together.