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  • Development of an automated system for planning road surface maintenance operations

    The article is dedicated to the development of an automated system aimed at creating a program of works for the maintenance of road surfaces. The system is based on data from the diagnostics and assessment of the technical condition of roads, in particular data on the assessment of the International Roughness Index (IRI). The development of a program of works for the maintenance of road surfaces is carried out based on the analysis of the IRI assessment both in the short term and on the time horizon of the contractor's work under the contract. The system is developed on the principle of modular programming, where one of the modules uses polynomial regression to predict the IRI assessment for several years ahead. The analysis of the deviation of the predicted IRI value from the actual one is the basis for the selection of works included in the program. The financial module allows the system to comply with the budget framework limited by the contract and provides an opportunity to evaluate the effectiveness of planning by calculating the difference between the cost of road surface maintenance and the contract value. Practical studies demonstrate that the system is capable of effectively and efficiently planning road surface maintenance works in accordance with the established contract deadlines.

    Keywords: road surface, automated system, modular programming, machine learning, recurrent neural network, road condition, international roughness index, road diagnostics, road work planning, road work program

  • Improving methods and technical means of indicating the presence of operating voltage in disconnected sections of the contact network

    A method is proposed for non-contact indication of the presence of operating voltage in disconnected sections of an alternating current contact network, based on the properties of liquid crystals and the effect of electrical influences. A procedure is given for selecting voltage indicator parameters when used on single-track sections of a traction network. The possibility of using sign-synthesizing liquid crystal indicators to create contactless indicators without an internal power source to indicate the presence of operating voltage in sections of the contact network is shown.

    Keywords: AC contact network, single-track section, disconnected section, operating voltage, non-contact indication, liquid crystal indicator, properties, equivalent circuit, selection of parameters

  • Design and research of an equalizer block for a high-speed data receiver channel

    In this paper, the problem of an equalizer design for high-speed receiver channel which is designed to compensate for the uneven frequency response of the input differential signal. Using special design methods, as well as modeling tools for frequency and transient characteristics, an equalizer with the ability to digitally adjust the gain was developed. This adjustment also reduces the impact of the spread of process parameters, which is inevitable during the production of the chip.

    Keywords: attenuation, transceiver, equalizer, IP block, equalization, gain, amplitude

  • About the integration of the Telegram bot into the information system for processing the results of sports competitions

    The article describes the integration aspects of the Telegram bot implemented on the 1C: Enterprise platform, into the information system for processing the results of sports competitions. The basic functionality of user interaction with the bot is considered. A diagram of the system states in the process of user interaction with the bot is provided, illustrating the possible transition states when the user selects certain commands or buttons. A diagram of the sequence of the registration process for participants of events using a Telegram bot is presented, illustrating the transmission of messages using post and get requests.

    Keywords: processing the results of sports competitions, Telegram bot, messenger,1C: Enterprise platform, state processing, information systems in the field of sports

  • Mathematical equipment and technological structure of the synthetic voice deepfakes forecasting system

    The article considers mathematical models for the collection and processing of voice content, on the basis of which a fundamentally logical scheme for predicting synthetic voice deepfakes has been developed. Experiments have been conducted on selected mathematical formulas and sets of python programming language libraries that allow real-time analysis of audio content in an organization. The software capabilities of neural networks for detecting voice fakes and generated synthetic (artificial) speech are considered and the main criteria for the study of voice messages are determined. Based on the results of the experiments, a mathematical apparatus has been formed that is necessary for positive solutions to problems of detecting voice deepfakes. A list of technical standards recommended for collecting voice information and improving the quality of information security in the organization has been formed.

    Keywords: neural networks, detection of voice defects, information security, synthetic voice speech, voice deepfakes, technical standards for collecting voice information, algorithms for detecting audio deepfakes, voice cloning

  • Using machine learning technologies to develop optimal traffic light control programs

    One of the key directions in the development of intelligent transport networks (ITS) is the introduction of automated traffic management systems. In the context of these systems, special attention is paid to the effective management of traffic lights, which are an important element of automated traffic management systems. The article is devoted to the development of an automated system aimed at compiling an optimal program of traffic light signals on a certain section of the road network. The Simulation of Urban Mobility (SUMO) traffic modeling package was chosen as a modeling tool, BFGS (Broyden-Fletcher-Goldfarb-Shanno) optimization algorithm was used, gradient boosting was used as a machine learning method. The results of practical research show that the developed system is able to quickly and effectively optimize the parameters of phases and duration of traffic light cycles, which significantly improves traffic management on the corresponding section of the road network.

    Keywords: intelligent transport network, traffic management, machine learning, traffic jam, traffic light, phase of the traffic light cycle, traffic flow, modeling of the road network, python, simulation of urban mobility

  • Evaluating the efficiency of fog computing in geographic information systems

    It is propossed to use foggy calculations to reduce the load on data transmission devices and computing systems in GIS. To improve the accuracy of estimating the efficiency of foggy calculations a non-Markov model of a multichannel system with queues, "warming up" and "cooling" is used. A method for calculating the probalistic-temporal characteristics of a non-Markov system with queues and with Cox distributions of the duration of "warming up" and "cooling" is prorosed. A program has been created to calculate the characteristics of the efficiency of fog calculations. The silution can be used as a software tool for predictive evaluation of the efficiency of access to geographic information systems, taking into account the features of fog computing technology and the costs of ensuring information security.

    Keywords: fog computing, model of a multi-channel service system with queues, “warming up”, “cooling down”, geographic information systems, Cox distribution

  • Technical science. Building and architecture

  • Study of the microclimate of the swimming pool when using in-floor convectors

    In residential and public buildings, in-floor convectors are often used as heating devices. This study examines the operation of convectors in a swimming pool room. The results of numerical modeling of room microclimate parameters taking into account calculated heat loads and moisture emissions are presented. A comparative analysis of the operation of various heating and ventilation systems for a public swimming pool was carried out. The results of the study were obtained in the form of temperature distribution fields, movement speeds and relative air humidity. A conclusion is drawn about the effectiveness of using in-floor convectors in indoor public swimming pools.

    Keywords: heating system, in-floor convector, moisture content, excess heat, excess moisture, air exchange, numerical modeling, room microclimate, SolidWorks, STAR-CCM+

  • The use of reinforced soils in the base of road pavements of highways located in 1 road-climatic zone

    The article is devoted to the use of reinforced soils in the base of pavements of highways located in the I road-climatic zone. The features of the operating modes of reinforced foundation soils are considered, and their physical and mechanical characteristics with various combinations of mineral and polymer modifiers are determined. The authors analyze the advantages and disadvantages of using reinforced soils. The article also discusses the design and construction of roads using reinforced soils.

    Keywords: highway, road pavement, foundation, soils, reinforced soils, modifiers

  • The methodology of full-scale testing of reinforced concrete beams as part of a ribbed monolithic floor

    In accordance with the requirements of Federal Law No. 384-FZ, the safety and reliability of buildings and structures must be ensured. One of the ways to confirm the safety and reliability of building structures is to conduct field tests. The authors of this article have developed a method for full-scale testing of a reinforced concrete beam with a span of 14.52 m as part of a monolithic reinforced concrete ribbed floor. The procedure for testing the beam was drawn up with the development of measures to ensure safety during work, the adjustment of the beam testing method by loading was performed, the beam was tested by loading method with fixation of its deflections, followed by analysis of the test results. The test results showed that the developed method can be used as a full-scale test to confirm the safety and reliability of building structures, namely horizontal reinforced concrete structures.

    Keywords: building structures, beam, destruction, safety, methodology, technical condition, field tests

  • Basics of calculating a quantitative assessment of the installation manufacturability of steel structures with a span of up to 18 m

    The relevance of the issue of variant design is considered, taking into account the analysis of previously applied solutions. The concept of installation manufacturability of objects is revealed, its component properties are substantiated. A table of the hierarchy of installation manufacturability properties has been generated. The functions of each level of the property hierarchy are disclosed. The weight indicators of the criteria were calculated using an expert survey. a formula for a complex indicator of installation manufacturability was obtained. A hypothesis has been put forward about the quantitative assessment of the levels of installation manufacturability.

    Keywords: manufacturability, installation manufacturability, levels of hierarchy of installation manufacturability, weight of indicators of properties of installation manufacturability, installation of steel structures

  • Predicting the service life of bendable reinforced concrete structures based on assessing the reliability of their technical condition

    Reinforced concrete structures must have sufficient reliability throughout their entire service life. In problems related to predicting service life based on an assessment of the technical condition, reliability can be considered as the probability of failure-free operation of structures, which consists in the ability to perform the required functions under given conditions during the design life. One of the methods for solving this kind of problem is statistical methods. The beam reliability calculation was carried out. It was further assumed that the beam was subject to degradation. As a result, a graph was constructed of the dependence of reliability on the depth of corrosion penetration into the compressed concrete zone. This graph also shows how the category of the technical condition of the beam changes over time.

    Keywords: reinforced concrete structure, bendable structure, prediction, service life, reliability, technical condition, degradation impact

  • About efficiency of application of multilayer stainless steel floor slabs in construction

    This article considers a new type of structures in the form of lightweight stainless steel floor slabs, gives an overview of application in construction practice, discusses the advantages and disadvantages. Based on the results of a series of structural analysis of several conditional models of buildings with different structural systems, the parameters of economic efficiency in the form of reduction of total metal intensity are determined. The area with increased efficiency of application of the considered plates in buildings is defined and the vector of necessary further research on the topic is outlined.

    Keywords: B-Core slabs, multilayer floor slabs, stainless steel, metal cost reduction, efficient application area, structural building layouts

  • Methodology for calculating the ultimate longitudinal force from an excentric external load acting on compressed reinforced concrete element

    The article addresses the issue of determining the ultimate eccentric compressive longitudinal force from an external load acting on a compressed reinforced concrete element. The calculation assumptions are adopted in accordance with the current code of practice SP 63.13330.2018. The transformation of the initial formulas given in this code allowed the explicit solution of the cubic equation with respect to the compressive longitudinal force without the need for iterative calculation methods. The solution thus obtained can be employed in the design process to determine the optimal section dimensions.

    Keywords: reinforced concrete, excentric compression,ultimate forces

  • Multifunctional chemical additive for concrete composites

    This paper presents the results of experimental studies on the development of a chemical additive for concrete and mortar mixtures to establish a modifying effect. A chemical additive was developed - a multifunctional cleaning agent - “LOC”, in order to establish its modifying effect for concrete composites. The results of the experimental studies confirm the effectiveness of the chemical additive under study as a modifier. Composite material samples modified with the developed product show higher technical characteristics: the obtained BC samples correspond to the concrete grade for workability - P3, when the standard sample has a grade - P2, the compressive strength of the control BC samples, with a chemical additive - ""LOC"" in an amount of 1%, increases by 28%, the established optimal dose of the additive being developed - Ministry of Emergency Situations - “LOC” for Bx and mortar mixtures is 1%, which guarantees its economic efficiency.

    Keywords: concrete composite, modification, surfactants, cleaning agent – “LOC”, anionic and nonionic surfactants, modifier, development, chemical additive, plasticity, strength, water absorption

  • The feasibility of using bitumen when strengthening cement soil

    The article discusses the use of organic binders to modify the properties of cement soils. The scope of application of cement soils in construction practice, including the construction of highways, is considered. The influence of the use of organic binders as a complex additive that modifies the strength characteristics of cement soils has been studied. The influence of the use of complex modifiers and additives on the frost resistance and water permeability of cement soils has been determined.

    Keywords: cement soil, organic binder, highway, working layer, frost resistance, modifiers

  • Specifics of spatial organization of small towns in the European Arctic

    The article is dedicated to the study of the planning structure features of small towns in the European part of the Arctic. The relevance of the research is due to the strategic importance of the region for Russia and the need for urban environment modernization. The results showed that the town layouts have a certain deviation from the north-south axis, and the towns themselves are characterized by compactness and efficient land use. These features ensure convenient access to social facilities and reduce operational costs, which is especially important in harsh Arctic conditions.

    Keywords: Arctic, planning structure, industrial towns, small towns, compactness, urban planning, Arctic architecture, Arctic urban planning, social infrastructure

  • Using the Experiment Planning Method when determining strength characteristics stabilized saline soils

    The article examines the application of the method of mathematical planning of an optimal experiment in determining the strength characteristics of reinforced soils. For the analysis, a multicomponent soil system was studied, consisting of unsalted and saline soils reinforced with bitumen with cement additives and surfactants. During the planning of the experiment, factors affecting the strength characteristics and their levels, as well as the intervals of variation of factors, were determined. As a result of solving the problem, mathematical models of adhesion and angle of internal friction of reinforced soils were obtained. Based on the obtained regression equations, the main conclusions were drawn.

    Keywords: stabilized soils, complex soil strengthening, experiment planning, complete factor experiment, mathematical model, regression equation

  • Contact zone shear test results using breaking load

    The article deals with the peculiarities of the results of tests carried out to determine the characteristics of the contact zone organized by stamping on a steel plate. During the test, the specimen was in the steel mold in which it was manufactured. The steel form was used to prohibit horizontal movement of the steel thin plates and minimize the effect of uneven slippage of the steel gouge in the direction perpendicular to the shear force. The considered tests were carried out according to a specially developed methodology, which took into account the specifics of the contact zone shear operation, the applied tooling and took into account the set objectives of the study.

    Keywords: contact zone, contact characteristics, test methodology, shear tests, stamping, composite design

  • Organizational scheme of major repairs of radiation diagnostics facilities

    The article deals with the issues of major repairs of rooms for radiation diagnostics in medical institutions, which is becoming more and more relevant in modern conditions. Functional diagnostics plays a key role in early detection of diseases, correct diagnosis and effective treatment of patients. With the development of technology and the advent of high-tech diagnostic equipment, there is a need to upgrade medical institutions to integrate such equipment. The study, conducted on the basis of an analysis of regulatory and technical documentation and scientific papers, highlighted the main stages of major repairs of radiation diagnostics facilities, identified the main participants in these stages. Organizational charts have also been developed for each stage, which emphasize the importance of coordination between all project participants, including builders, engineers, architects and medical specialists. The implementation of such schemes helps to minimize time and financial costs, ensures the implementation of all necessary requirements and standards, and guarantees the high quality of the work performed. As a result, we receive an organized repair process that allows medical institutions to effectively use new diagnostic equipment to improve the quality of medical services and improve the diagnosis and treatment of patients.

    Keywords: major repairs, healthcare facilities, radiation diagnostics facilities, medical organization, project documentation

  • Choosing the shape of a rational structural covering

    The paper deals with the problem of choosing the most rational form of spatial metallic cross-barrel coating. Mathematical models of flat structural coating, elliptical paraboloid and hyperbolic paraboloid coatings in SCAD software package based on finite element method are analyzed. Nodal connections of rod elements of coatings are taken according to the system “Kislovodsk”. The obtained parameters of stress-strain state of three different structural coverings allow us to speak about practically identical operation of the structures.

    Keywords: structural covering, spatial covering, cross-bar covering, stress-strain state, “Kislovodsk” system, SCAD program complex, finite element method, hyperbolic paraboloid, elliptic paraboloid

  • Improvement of methods of control of geometric parameters of reinforcing bars of periodic profile

    To implement effective adhesion of reinforcement to concrete, a large number of different types of periodic reinforcement profiles have recently been developed, the control of geometric parameters of which presents serious difficulties and allows for a high probability of measurement error. The urgency of the problem is due to the need to improve methods for measuring the geometric dimensions of reinforcement with a complex periodic profile in order to increase the accuracy of results along the entire length of the rod, the ability to measure the angles of inclination of axes, protrusions and dents, identify places of geometric stress concentrators to ensure the necessary quality of the finished product, reliable adhesion of reinforcement to concrete, increase the durability of reinforced concrete structures and products. The paper proposes a new method for measuring geometric parameters based on removing replicas from the surface of the reinforcement in different sections along the length of the rod. The analysis of prints presented in an expanded, flat form is carried out using counting and measuring devices, which significantly improves the accuracy and comparability of measurements, including angular dimensions. The use of modern optical devices and software for them helps to reduce the time for determining and visualizing geometric parameters, and improve measurement accuracy, which is measured in microns. The analysis of the obtained results showed an increase in the accuracy of measurements by removing replicas of geometric parameters of samples by 10-16.5% compared with traditional control methods. The developed method simplifies the measurement process, allows the use of alternative measuring instruments, a combination of calculation and instrument measurement methods.

    Keywords: reinforced concrete products, profiles of reinforcing bars, methods of controlling geometric parameters, method of removing replicas, improving accuracy, reliability and comparability of measurements

  • Calculation of two-layered reinforced concrete beams according to the first and second groups of limit states

    Mailyan D.R., Nesvetaev G.V., Kolleganov N.A.

    Keywords: double-layer reinforced concrete beams, normal cross-sections, nonlinear deformation model, high-modulus concrete, neutral axis coordinate

  • Multidisciplinary research