Ring-shaped reinforced concrete structures are widely used in construction. For example, in the form of underground pipelines. They experience a complex nonlinear deformed state (VAT), which is analytically described as a complex mathematical problem of mechanics. Therefore, numerical methods are often used to solve it. This article uses the finite element method (FEM) implemented in the Lira-CAD 2022 PC. The VAT of reinforced concrete pipelines is determined in a physically nonlinear formulation, taking into account 4 factors of influence: the inner diameter, the concrete class, the properties of the filling soil, and the properties of the foundation soil. A plan has been drawn up for a complete multifactorial numerical experiment, which includes 81 models. The values of internal force factors in all sections of the underground pipeline are obtained, taking into account the variation of each factor individually and taking into account their mutual influence. Combinations of factors giving extreme values of internal forces in the pipeline have been established. Based on this, recommendations for rational design have been developed.

Keywords: underground pipeline, reinforced concrete, computer modeling, longitudinal profile, cross section, PC "Lira-CAD"

This article examines the problem of obtaining three-dimensional images of an object using digital holography. Several methods based on holographic interferometry exist: the offset source method, the immersion method, the dual-wavelength method, and the use of a low-coherence illumination source. Each of the methods discussed has its own advantages and disadvantages. In most cases, quantitative information about the relief parameters is required. However, the poor quality of topographic fringes and the problem of determining the sign during relief determination cause significant difficulties in volume determination. These problems can be overcome by using a simple method of determining the volume using two stereo images reconstructed from holograms and subsequent refinement using one of the methods for obtaining holographic topographic maps. This paper demonstrates a method for determining a three-dimensional image using two stereo images of an object reconstructed from digital holograms. long exposure and development time, which is usually done separately from the optical setup. In the case of holographic interferometry systems, it is necessary to provide for mounting the hologram back into the optical setup with sufficiently high accuracy. Therefore, digital holography methods have been developed to record holograms on photomatrices with limited resolution. These methods are based on the use of optical schemes at small angles (less than 5 degrees) between interfering beams. Recently, sensors with a single element size of 1.33 µm and 0.56 µm have appeared. This resolution makes it possible to return to registration schemes with angles between interfering beams of 30-60 degrees. This allows us to hope for the revival of holographic methods and methods of holographic interferometry at the modern level without the use of intermediate recording media.

Keywords: obtaining holograms and reconstructing images from them, digital holography, spatial resolution of holograms, stereo images, reconstruction of volumetric images

The article proposes a new technique for automating the screening of radiation diagnostics of employees of enterprises using elements to support medical decision-making, in particular, the U-shaped architecture of a convolutional neural network with a dual attention mechanism. A special feature of the architecture is the use of an attention mechanism based on "compression and excitation" blocks, which makes it possible to improve the quality and accuracy of digital medical data analysis, taking into account the features of computed tomography images.

Keywords: machine learning, convolutional neural network, computed tomography, architecture, chronic obstructive pulmonary disease

This article introduces the FCA (Filtration Capacitive Analysis) software suite, designed for interpreting well test data from complex well configurations, including horizontal wells with multistage hydraulic fracturing (MSHF) in low-permeability reservoirs. The system employs a modular client-server architecture, ensuring scalability and reliability. The implemented numerical methods address key challenges in well test interpretation, such as data preprocessing with advanced filtering techniques (e.g., Kalman filter, Savitzky-Golay filter, and convolutional autoencoders) and solving the inverse problem using filtration-capacitance invariants and the superposition principle. Practical application results demonstrate FCA's effectiveness in estimating formation flow capacity properties and well parameters. Validation against industry-standard simulator KAPPA Saphir confirmed FCA's higher sensitivity to model correctness, reducing interpretation ambiguity and ensuring reliable industrial deployment.

Keywords: well test interpretation, low-permeability reservoir, filtration-capacitance analysis, inverse problem, software architecture, client-server, convolutional autoencoder, superposition principle, misfit minimization, multistage hydraulic fracturing

The paper presents a technique for integrating three-dimensional solid-state models developed in the CAD SolidWorks environment into the MATLAB/Simulink dynamic modeling environment. A key element of the research is the use of the Simscape Multibody module to transform geometric data and kinematic relationships into a multi-mass dynamic model. The technique has been tested using the example of creating a virtual prototype of a steering wheel platform.

Keywords: SolidWorks, MATLAB/Simulink, Simscape Multibody, Virtual prototype, steering kinematics, end-to-end design, multi-mass dynamic modeldiversification, production and technical goals to ensure production flexibility

During the restoration of buildings in the construction industry, mechanized waste removal from work areas and construction sites is often neglected. This poses a safety risk to both people and the environment due to high levels of dust in the air. Dozens of new buildings appear in modern megacities every year. This trend has its pitfalls. In particular, the increasing number of construction sites makes the problem of construction waste removal particularly pressing. Currently, two methods are primarily used to remove construction waste from construction sites: throwing waste out of windows and lowering waste down stairs or scaffolding. The advantage of the first option is the quick solution. However, throwing waste out of windows raises environmental and safety concerns. The second method is considered safer, but it requires significant physical effort. Therefore, a construction waste chute is currently the most effective solution to this problem.

Keywords: technosphere safety, safety management, construction waste, environmental pollution, monitoring

The article discusses the current issue of dangerous natural and anthropogenic processes. It provides a general description of these processes. The article analyzes the risks associated with anthropogenic processes and natural phenomena. Special attention is given to modern methods of monitoring and forecasting dangerous anthropogenic and natural processes.

Keywords: dangerous natural processes, dangerous man-made processes, consequences of dangerous processes, accidents, man-made threats, natural disasters, risk factors, systematic approach

The paper considers the solution of the problem of synthesis of a multiconnected nonlinear system with polynomial and piecewise linear approximations. The generalized Galerkin method is used as a mathematical apparatus. The synthesis results and advantages of each of the approximations are presented.

Keywords: multivariable automatic control systems, parametric synthesis, nonlinear automatic control systems, generalized Galerkin method, polynomial approximation, piecewise-linear approximation, saturation, minimization, objective function, recurrent relations

The article presents a study of various approaches to implementing micro-frontend architecture in high-load web applications. It describes a comparative analysis of four main micro-frontend integration patterns: Module Federation, Single-SPA, Web Components, and iframe approach. An experimental performance study of each pattern was conducted, measuring key loading and interaction metrics

Keywords: micro-frontends, web architecture, Module Federation, Single-SPA, high-load systems, web application performance