Issues of environmental protection, in particular atmospheric air, protection of the population from the effects of pollutants living near the deployed construction works are relevant, as the volume of construction and commissioning of new buildings and structures increases, and there is a continuous development of equipment and technologies in construction production. In order to study the degree of air pollution of the construction site during 2020-2023, air pollution with fine dust particles PM2.5 and PM10 was monitored, namely the volume of dust emissions, their chemical composition to assess pollution from construction processes and equipment that produce these construction processes, taking into account the factors of background dustiness of the air environment of the territory, affecting on the health of construction workers and the population. Based on the results of the work carried out, it was determined that the highest concentration of dust and the volume of dust emissions are shown by earthworks. The results of this work, with practical accuracy.
Keywords: environmental safety, environmental monitoring, atmospheric air protection, ecology in construction, dust suppression, feasibility study, dust collection systems, labor protection in construction
In this work, the developed system for detecting areas with defects in the development of corn crops was investigated from a photograph taken by an unmanned aerial vehicle (UAV) using computer vision. To solve the problem of detecting such sites, the structures of the YOLOv5 and YOLOv8 neural networks were considered. The use of the developed software will reduce labor and time costs for image analysis, which in turn will reduce the response time when problem areas are detected in agricultural fields to achieve higher yields.
Keywords: instance segmentation, YOLOv5, YOLOv8
Clinker tiles are one of the most popular types of roofing materials. Compared to other roof coverings, clinker tiles have higher strength, resistance to aggressive environments and aesthetic indicators. The relevance of the production of clinker tiles due to the fact that at present architects and builders are showing great interest in such an elite roofing material such as clinker tiles. However, the main trends in the production of ceramic tiles are to increase its strength while reducing weight by reducing the thickness. The conducted research has shown that the production of clinker tile on the basis of argillites Nekrasovskogo deposit is possible at a fractional composition of 0-0,08 mm, 0-0,05 mm and firing temperature of 1050 ˚C.
Keywords: argillite, tile, clinker, research, chemical composition, mineral composition, ceramic products, properties, technology
In the world of web development, there is a growing need for tools that can provide high performance for client applications. In response to this challenge, WebAssembly technology has been developed to compile various programming languages into a binary format that can be executed in web browsers. The new AssemblyScript programming language provides the ability to create high-performance WebAssembly modules using the TypeScript language syntax familiar to Web developers. This paper investigates WebAssembly and AssemblyScript, and compares the performance of AssemblyScript and JavaScript using four computational algorithms as examples. The test results demonstrate faster execution speed of AssemblyScript in most tasks, as well as more stable performance when executed in different browsers. The study highlights the relevance of using AssemblyScript to optimize computationally intensive operations in web application development.
Keywords: assemblyscript, webassembly, wasm, javascript, front end, performance, web applications
The article provides the results of the calculation of a steel span structure. Two options for the design scheme were considered. In scheme №. 1.1, the bending moment is perceived by the beam elements. In scheme №. 1.2, the bending moment is perceived jointly by the beam elements and cable structures. A comparison was made of the results of determining bending moments.
Keywords: main beam, secondary beam, column, boundary conditions, loads, bending moment, CAD
Over time reinforced concrete construction tend to lose their strength properties. An important factor in maintaining the integrity of reinforced concrete structures is the compliance of the parameters of the erected structure with its design values and operating conditions. Otherwise, the likelihood of defects such as the formation of cracks in the protective layer and corrosion of reinforcement increases. There are methods for restoring reinforced concrete structures that can return the strength characteristics to the design level or even exceed it.
Keywords: restoration of the protective layer, repair, inhibitor, adhesion, corrosion, penetrating waterproofing, chemical anchor, foundation, shotcreting
The article discusses modern methods of conducting construction control (CS) as part of the implementation of the government program for digitalization of the construction industry. The prerequisites justifying the need for automation of the SC are presented. A review of the software used by Russian construction companies to transfer quality control processes into electronic format was carried out. Based on the completed review, a comparative analysis of the most significant and frequently used software functions is presented. The requirements for them have been formed. They are classified based on their integration into digital models of capital construction projects. This allowed the authors to develop an algorithm for conducting a QC taking into account all the requirements of regulatory documents and the interaction of the main participants in the construction process. It provides for automatic data transfer for the generation of as-built documentation in electronic form, the appointment of persons responsible for correcting defects, their photo and video recording with reference to the 3D model of capital construction projects.
Keywords: digital technologies, automation, regulatory documentation, as-built documentation, quality, construction processes, construction control, information model
The article discusses the areas of application of the deformation model and reviews studies related to its use for various design solutions and operating conditions. A method for calculating eccentrically compressed reinforced concrete elements that takes into account second-order effects is presented. This methodology takes into account the current provisions of regulatory documents. A selection of experimental data was made for flexible eccentrically compressed columns. Calculations of bearing capacity and deflections for selected samples were performed. Various forms of concrete deformation diagrams were used in the calculations. Based on comparison with experimental data, conclusions are drawn about the applicability of various types of diagrams for calculating bearing capacity and deflections.
Keywords: deformation model, stress-strain diagram, eccentrically compressed element, flexibility
This paper analyzes the shortcomings of the existing organizational and technological documentation, namely the construction organization project and the project of work production. It is concluded that the main task of organizational-technological documentation is to minimize construction risks at the earliest stage, to increase knowledge about the project and to transfer the process of development and decision-making to an earlier stage of construction. As a solution to these problems, it is proposed to consider the use of building information modeling technologies (BIM) in construction, and move to the development of digital construction organization project (4D model of the construction process), which is a digital information model of the capital construction object (3D model), the elements of which are interconnected with the work on construction production. Two projects where the building information modeling technology was applied and a digital construction organization project was developed are considered: construction of an underground tunnel and reconstruction of a power unit of a combined heat and power plant. The advantages of using a digital construction organization project are proved, which makes it possible to forecast the planned duration of works, as well as the duration of works, taking into account the occurrence of risk events, necessary resources and equipment.
Keywords: digital project of construction organization, 4D model, building information modeling, project of construction organization, capital construction object
The problem of choosing the most optimal gas supply scheme for rural settlements with a complex configuration and natural water barriers is considered using the example of x. Shebalino, Oktyabrsky district, Volgograd region. Four options for gas supply schemes with different numbers and locations of gas reduction points have been developed. The material characteristics and projected cost of design, construction and installation work for each option have been determined. Recommendations on the application of selection criteria are given.
Keywords: gas distribution network, gas reduction points, hydraulic regime, normalized pressure, cost, construction and installation works
This paper presents the concept of using fuzzy control methods in the construction of energy efficient systems based on photovoltaic modules. An analysis was made of methods to improve efficiency in the case of weather in Vietnam on a sunny summer day for photovoltaic modules. The results show that the efficiency of the proposed system is increased by 27.91%, 23.30% and 4.95% compared to the PV module, respectively, with a fixed tilt system, a water-cooled system, and a solar tracking system. The simulation results can serve as a prerequisite for future experimental models.
Keywords: Photovoltaic module, thermoelectric model, solar tracking, water cooling, efficiency, fuzzy logic
In the development of cloud providers, not only the types of services they provide play a significant role, but also fault tolerance to service failures. It is important for a cloud service provider to prepare and configure the server and service for fault-tolerant operation so that the customer works with a high degree of readiness and reliability in the system allocated to him. To prepare such a server, it is very important to think carefully about the architecture of the virtual machine, on which all the necessary means of data exchange and integration for the operation of the service will be installed, and protection against network threats that can disrupt the server's performance will be configured. The purpose of the work is to create a virtual machine architecture protected from network threats, which provides customers with access to the iTOP CMDB system. Despite the fact that there can be any number of customers, the iTOP CMDB system should be provided to each customer with its own version, which he can administer. The user can log in using an Internet browser by entering the name of his organization as a domain. The authors present a demonstration of the iTOP CMDB system, which is located on a virtual machine protected from network threats.
Keywords: virtual machine, architecture, firewall, iTOP CMDB system, server, network threat, network attack, IP address, firewall, request
The analysis of N.N. Pavlovsky's method for calculating the parameters of the riverbed in the branches is given. The reasons for the limitation of this method have been established. The Lagrange transform is used to find the extremum of the objective function for equations of uneven fluid motion, which makes obtaining an equivalent resistance modulus highly visual and easy to use. The results of the experiment are presented.
Keywords: calculation method, multi-node sections of rivers, resistance modulus, N.N.Pavlovsky method
The paper describes the process of modeling 3D structures of synthetic gas burners, with the analysis of the simulation results obtained for several types of models and the selection of optimal modes for them. The main use of the burner is planned for boiler equipment for household needs in private as well as apartment buildings, in the absence of central heating. In addition, the article provides a justification for the thermal parameters at the inlet and outlet of the burner.
Keywords: synthesis gas, combustion, design parameters, combustion chamber, nozzle, modeling
Using numerical simulation, particle deposition in a porous heat exchanger was studied; the mechanism of sediment formation was sinvestigated, and the influence of sediment on the heat flow was assessed. The influence of porous heat exchanger length, dust particle size, and air flow velocity on particle deposition efficiency, particle breakthrough, and heat flux value was studied. Research results have shown that with increasing length of the heat exchanger, the efficiency of dust particle deposition increases, which leads to the formation of sediment. In turn, the sediment reduces the value of the heat flow from the porous heat exchanger. Depending on the length of the heat exchanger and air velocity, the reduction in heat flow is 3.43-7.27%.
Keywords: porous media, heat exchanger, particle deposition, deposition efficiency, particle breakthrough, sediment, heat flow, numerical modeling, computational fluid dynamics, calculation