A method of applying mathematical analysis and machine learning to organize predictive maintenance of an electric motor is considered using the example of the AIMU 112 MV6 U1 electric motor. A comprehensive technique for diagnosing the technical condition of an electric motor based on the analysis of vibration signals recorded by a three-axis accelerometer is proposed, which can be adapted to monitor the condition of various types of rotating equipment in industrial conditions.

Keywords: predictive maintenance, electric motor, vibration analysis, machine learning, neural networks, fault diagnosis, accelerometer, condition classification

The article presents a systematic study of information flows in the "application-DBMS" link and proposes a comprehensive model of protection against SQL injections based on multi-level analysis. The system analysis considers the full cycle of query processing, which allows overcoming the fragmentation of existing approaches. The limitations of existing methods based on signature analysis, machine learning, and syntax validation are analyzed. To improve the reliability and accuracy of detection, a new combined method is proposed that integrates static syntax analysis of abstract syntax trees (AST) of queries with dynamic behavioral analysis of sessions. A key feature of the syntax module is the application of the Jaccard coefficient to assess the structural similarity of paths in the AST, which ensures the efficient detection of polymorphic injections. The behavioral module analyzes the temporal and statistical patterns of the query sequence, which allows.

Keywords: SQL injections, system analysis, machine learning, parsing, abstract syntax tree, behavioral analysis, Jaccard coefficient, polymorphic attacks, time-based attacks

This article describes a method for filtering speckle noise from synthetic aperture radar images using wavelet transforms and nonlocal means. The proposed method utilizes a spatial-frequency representation of the image and analyzes the similarity of local wavelet coefficient structures in subbands. Experimental results demonstrate that the developed method outperforms some known methods in terms of metrics such as mean square error, peak signal-to-noise ratio, and structural similarity index, as well as subjective visual assessment. The method effectively filters speckle while preserving fine details, contrasting edges, and correctly restoring background brightness without introducing noticeable artifacts.

Keywords: radar image, synthetic aperture radar, speckle noise, image filtering, wavelet transform, thresholding, non-local means

TThe article is devoted to the analysis of the impact of embedded artificial intelligence on operational efficiency and interaction models in companies. An AI assistant integrated into the ecosystem of the Bitrix24 customer relationship management system is considered as a key case. It shows how the introduction of large language models into the user interface transforms the interaction of employees with data and with each other. The main focus is on the practical aspects of using the assistant to optimize communications, analyze information, and support decision-making, including its function of automatically logging and analyzing meetings. It describes the formation of a new paradigm of "human-machine cooperation", where artificial intelligence is not a tool, but an active participant in business processes, capable of semantic data analysis and knowledge generation.

Keywords: artificial intelligence, business processes, large language models, customer relationship management systems, Bitrix24, communication analysis, management optimization

The article examines the retrospective of the market’s emergence as an archaic element, its placement within the urban environment, and its value in contemporary conditions. It illustrates the interaction between the market square and the church. The differences between a shopping and entertainment centre and a traditional market are explored, along with the latter’s advantages and distinctive features. The focus is on markets as communicative spaces with their own character and originality, and on their influence on the identity of the urban environment. The study emphasises the architectural and spatial environment of the market square within the context of the urban planning framework.

Keywords: market, market square, retail space, commercial space, shopping space, shopping and entertainment centre, shopping and entertainment center, modern retail space, contemporary shopping space, trading rows, market stalls, covered market arcade

Abstract: The scope of applying fiber-reinforced concrete in critical load-bearing structures, such as aerodrome pavements, is often limited by insufficient information regarding material behavior and life-cycle economics. This study addresses this gap by developing and evaluating an optimal hybrid mix of micro and macro-basalt fibers consisting of 1.5% and 0.5% of cement mass, respectively for high-performance airfield concrete, followed by a 30-year Life-Cycle Cost Analysis (LCCA). Mechanical testing confirmed the technical feasibility, showing significant performance gains over baseline concrete: 14.5% increase in compressive strength 72.8MPa and 18.2% increase in flexural strength 10.4MPa. These gains are attributed to enhanced durability, multi-scale crack control, and superior post-crack load-carrying capacity. The LCCA, conducted using a 6% discount rate, revealed that the hybrid option, which incurs a 13.03% higher upfront material cost, is economically viable only under the optimistic scenario where the improved durability eliminates the need for major rehabilitation over 30 years. This scenario yields a marginal LCC saving of 4% compared to the baseline. In conservative and moderate scenarios, the upfront cost outweighed the delayed or reduced rehabilitation costs. Overall, Hybrid Basalt Fiber Reinforced Concrete is a promising high-performance material that achieves cost parity if its durability benefits are maximized to prevent major rehabilitation. Future work should involve field trials and expanded LCCA incorporating operational downtime and risk-based performance modeling.

Keywords: aerodrome pavement, basalt fiber, hybrid fiber-reinforced concrete, life-cycle cost analysis, rehabilitation, discount rate, microfiber, macrofiber, net present value

This article examines the design of efficient nodal connections for steel frame elements, taking into account international experience. A comparative analysis of the calculation approaches adopted in the European standard EN 1993-1-8, the Chinese standard GB 50017-2017, and domestic regulatory documents is provided. Particular attention is paid to the impact of calculation assumptions and consideration of the deformative rigidity of nodal connections on the performance of frame systems. To verify the validity of the adopted models, numerical simulation of flange connections was performed using the finite element method. The results of the study confirm that the use of modern regulatory approaches allows for a more accurate consideration of the actual performance of nodal connections and contributes to a more rational design.

Keywords: nodal connections, steel frames, flange connections, nodal calculations, normative approaches, numerical modeling, international experience

The article examines the environmental impact of ferrous metallurgy waste, with particular emphasis on its contribution to the formation of the fine particulate fraction PM10. The analysis shows that dispersed materials generated during waste handling participate in the formation of stable aerosol structures, the role of which has long been underestimated due to fragmented data and limitations in monitoring. Previously unrecognized mechanisms of metal-containing particles contributing to the overall aerosol load were identified. Based on the synthesized information, a methodological approach is proposed that enables a new perspective on assessing the influence of metallurgical waste on ambient air quality.

Keywords: fine particulate matter, PM10, metallurgical waste, dust formation, aerosol load, metal-containing aerosols, technogenic impact, ambient air quality, secondary resuspension, environmental monitoring, assessment methodology

This study presents a comprehensive analysis of existing organizational and technological solutions employed in the demolition of high-rise buildings in dense urban environments. The relevance of the research is driven by the shortage of available land in large settlements, the necessity to minimize the environmental and structural impact of construction processes, and the goal of reducing the construction cycle.
Based on a case study involving the demolition of a 16-story precast concrete building, the work examines the main demolition methods: mechanized, manual, and combined. Drawing on existing regulatory and technical documentation, scientific publications, and practical experience, the study highlights the possibility of optimizing technological processes through the parallel execution of various work stages.
The article assesses the rationality of this approach, aimed at reducing the overall construction timeline.

Keywords: demolition, high-rise building, manual demolition, mechanized demolition, combined demolition, collapse zone, confined urban conditions, concurrent construction operations, renovation

The article discusses the differences and uniformity of architectural structures from different times and nations, the shapes of houses and roofs, and the structural design of buildings. The article provides a clear understanding of the shapes of the circle, its semantics, and significance. Using examples from contemporary architects, the article explores the concepts of creating ideological projects and the complexities involved in their implementation. The ideological solutions for the shape of the circle in modern buildings are slightly modified through the creative designs of the architects.
Architectural forms are based on basic geometric shapes such as circles, squares, and triangles. Without knowing the beginning of the stories of the creation of houses and settlements, we do not come to a solution of a new, completely unaccepted for us one century ago, building and houses. The main research material affects the round forms of not only houses (mansion, estate, manor) and buildings, but also settlements, estates of different peoples. If earlier built houses of the same type, now, thanks to high technologies and productions.

Keywords: circle, architecture, building, texture, shape, material, construction, project, structures, house

The article is devoted to identifying the morphological patterns of medieval fortified residential complexes (galuans) in North Ossetia, based on field surveys between 2022 and 2025 and 3D scanning of architectural monuments conducted.  The author deconstructs the “architectural code” of mountain building as an autochthonous system and systematizes four fundamental principles. Using the complexes in the settlements of Galiat, Lisri, and Khanaz as case studies, the paper analyzes the types of module interlocking and the principles of tectonics.

Keywords: galuan, mountain architecture, North Ossetia, morphological analysis, architectural code, 3D scanning

The article deals with the actual problem of increasing the durability of concrete and reinforced concrete structures by using various mineral additives. The mechanisms of concrete corrosion, sulfate, chloride, carbonization, frost damage, and corrosion caused by magnesium ions are analyzed. Changes in the regulatory framework concerning organomineral mixtures (OMS) are highlighted.
The goal is to study the influence of developed complex additives, for example, based on low-calcium fly ash, microsilica, and superplasticizers, on the properties of cement stone to increase its density, strength, and resistance to sulfate corrosion.                                    Research results show that mineral additives improve the corrosion resistance of concrete due to the pozzolanic reaction, compaction of the structure, reduction of permeability, and changes in the phase composition of cement stone. The effect of various additives on strength, waterproofing, frost resistance and resistance to aggressive environments is described in detail. Examples of concrete compositions with organo-mineral modifiers of the MB type for various applications are presented, demonstrating the achievement of high-performance characteristics. The pozzolanic activity of some additives was analyzed. The promising nature of nanotechnological approaches is noted.
The conclusions are that the use of mineral additives is an effective method of increasing the corrosion resistance and durability of concrete. The correct choice of the type and dosage of additives, based on the understanding of the mechanisms of their action and operating conditions, allows you to significantly extend the service life of construction structures and ensure their reliability. Complex organomineral modifiers and nanotechnologies open wide opportunities for creating high-quality concretes with specified properties.

Keywords: concrete, mineral additives, corrosion resistance, durability, fly ash, microsilica, organomineral modifiers

A comparative study was conducted to examine the impact of high-strength and dispersion-reinforced concrete on the stress-strain state and structural economics of a high-rise building. The objective of the study was to select optimal solutions for load-bearing columns and cantilever elements. Using a model of a 104.0-meter-tall business center, calculations were performed in the LIRA-SAPR software package for B40 and B80 grade concrete, steel fiber reinforced concrete (based on B40), and a new material—textile-reinforced concrete (TFC). TFC demonstrated improved strength properties. It was found that using steel fiber reinforced concrete for columns allows for a reduction in their cross-section, and the required area of ​​reinforcement bars is reduced by 30–60% compared to conventional concrete. Moreover, for small cross-sections (400x400 mm), the use of high-strength B80 concrete is limited by the standard maximum reinforcement percentage. Calculation of cantilever slabs showed that using 80 mm thick TAB instead of traditional 120 mm thick reinforced concrete results in a 35% reduction in deflection and ensures multiple fine cracking. An economic analysis revealed that the cost per linear meter of a 400x400 mm steel fiber reinforced concrete column is 20.6–26.9% lower than its B80 and B40 counterparts. The cost per square meter of a cantilever slab made of TAB is 14% lower than the base case. The results confirm the high efficiency of the combined use of fiber-reinforced concrete for the frame and TAB for thin-walled cantilever elements in high-rise construction. 

Keywords: Textile-reinforced concrete, steel fiber concrete, high-strength concrete, high-rise building, cantilever structures, columns, stress-strain state, LIRA-SAPR, dispersed reinforcement, concrete strength, crack resistance

The paper presents a finite element model of a reinforced concrete viaduct column retrofitted with a steel jacket. The model was developed in ANSYS software, accounting for material nonlinearity and contact interactions between the concrete column and the steel jacket. The selection of finite element types, material constitutive laws, and the friction coefficient is justified. Numerical simulations revealed three distinct stages in the composite behavior of the column–jacket system under loading. Particular attention was given to the analysis of the contact interface and the investigation of the steel–concrete friction coefficient, which significantly influences the system response at each loading stage and serves as the basis for distinguishing these stages. The study demonstrates that accounting for the composite action between the reinforced concrete column and the steel jacket yields an additional load-carrying capacity reserve of up to 16% compared to separate, non-composite design calculations. Furthermore, the paper includes an analysis of the influence of the spacing of transverse tie plates of the jacket on the load-carrying capacity of the retrofitted column and identifies optimal ranges for this spacing.

Keywords: material nonlinearity, stress–strain relationship или Constitutive law, steel jacket, Pipe rack column, coefficient of friction, strengthening, finite element model, reinforced concrete, composite action, nonlinear stress–strain model

The article provides an analysis of the architectural aspects of sports and recreation buildings and structures of universities in the Southern Federal District (Rostov Region, Krasnodar Territory, Republic of Crimea) and Stavropol Territory, united in the framework of the study by the concept of "South of Russia". The classification of sports and recreation facilities at the universities under study is carried out. Some functional, spatial and planning features of sports buildings and facilities, sports and recreation facilities, student sanatoriums, sanatoriums, student polyclinics at universities in the South of Russia have been identified, which can serve as a basis for developing principles of architectural modernization of these facilities.

Keywords: architectural features, university sports and recreation facilities, student polyclinic, student health resort, university infrastructure

This article presents a method for improving the physical and mechanical properties of concrete products by selecting a rational granulometric composition of sand, and also examines the problem of insufficient amounts of sand with the required fineness modulus in quarries.

Keywords: paving slabs, two-layer products, sand fineness modulus, performance characteristics, composition optimization, structure modification

In the current conditions of metallurgy development, the task of ensuring uniformity and stability of the raw material base is of key importance, as the main technological indicators and quality of the produced metal directly depend on these parameters. Agglomerate ore, which is an essential component of the blast furnace charge, has high requirements for the uniformity of its properties. Variations in the chemical and granulometric composition of agglomerate ore negatively affect the stability of the blast furnace operation, leading to increased coke consumption, reduced overall productivity, and inferior technological characteristics of the produced pig iron.
This article discusses the results of research on modeling alternative technologies for averaging agglomerate ore.

Keywords: homogeneity, mixing quality, agglomerate, averaging, standard deviation, coefficient of variation, mass fraction of the component

The article presents a digital processing algorithm for monitoring short-circuit currents in the power supply network. It is proposed to carry out control by calculating the rate of change of current. An algorithm based on a digital differentiating filter with suppression of high-frequency components has been developed. Based on the Fourier series, a non-recursive filter is formed, the characteristics of which are improved using the Lanczos smoothing method. It is proposed to use a recursive filter transformed from a non-recursive one using the B.L. Ho algorithm to save processing. The algorithm is easily implemented as programs for microprocessor systems. A filter based on an analog prototype is presented. A simulation of the short circuit process has been carried out.

Keywords: power supply, short-circuit current, data processing algorithm, power supply system monitoring, digital differentiating filter

The relevance of this study is determined by the widespread use of digitalization in many economic sectors and the significant lag in the cement industry in this area. This paper provides an overview of modern approaches to studying digital twins and assesses the status of their implementation in cement production. The purpose of this study is to identify the specific features of digitalization processes, as well as barriers and prospects for the development of digital twins in the cement industry. It is demonstrated that the implementation of digital technologies can become an effective tool for transforming the cement industry, provided that digital twins are implemented within the product value chain. Authors indicate the need for a new model for the long-term sustainable development of the cement industry based on modern digital technologies within the structure of the industry balance of building materials. management. The authors conducted a study of activities that had a negative impact on the environment and local population during project implementation. These activities were examined across the three main phases of project implementation: construction, operation, and liquidation. The results were used to determine factors and categories of impact on the economy and employment, the safety and well-being of the local population, social tensions, land ownership and land use.

Keywords: enterprise digitalization, digital modeling, digital twin, digital technologies, optimization of production processes, typology of digital twins, cement industry, value chains, sustainable development model, management efficiency

The study aims to develop a model for integrating principles of territorial identity into the training of architects and urban planners to overcome the impersonality of the urban environment. An analysis of educational programs at 25 Russian universities revealed a systemic deficit in developing competencies for working with regional context. As a solution, a proposed academic discipline with a course project titled "Tourist Cluster 'Myth of Place'" is introduced, aimed at cultivating skills for identifying and interpreting the unique code of a territory through design. Its implementation is intended to enhance tourism appeal, stimulate the local economy, and strengthen the social capital of regions. This could also reduce the outflow of qualified professionals by creating in-demand local professional practice.

Keywords: architectural education, myth of space in architecture, territorial identity

The problem of ensuring the reliability and durability of the restored pipelines is an urgent task, especially in connection with the use of new materials in repair practice. In recent years, polymer materials have been widely used in pipeline repair and restoration work. Research in this area is mainly focused on technological processes, the development of equipment and structural elements made of composite materials. In our study, we set ourselves the task of using mathematical modeling to evaluate the operation of the steel+polymer shell structure after repair work on the gas pipeline, namely, the dynamics of changes in reactive pressure and maximum stresses in pitting corrosion zones depending on ground conditions. The results were obtained that allow us to predict the service life of this structure in soils with different corrosion activity. A significant increase in the bearing capacity of a worn pipeline repaired with polymer inserts in soils with high activity of corrosion processes has been proven.

Keywords: gas pipeline, metal corrosion, repair and restoration work, polymer materials, corrosive soil, durability, forecasting the service life

The article discusses methods of mixing expensive light oil with heavy oil to produce oil mixtures that meet the customer's needs in their properties. A block diagram of in-line mixing of sulfurous and low-sulfur oil is presented by means of automatic control of pumping units pumping oil into the main oil pipeline by means of an adaptive PID controller controlled by a flow analyzer of input oil parameters.

Keywords: oil, transportation, mixing, control, adaptive regulator