Vol 10, No 4 (2024)

Aim. To study various network architecture options for implementing an electronic differential system in an electric vehicle.

Materials and Methods. The study primarily used comparative analysis to identify the most rational neural network (NN) architecture for processing numerical data structured as arrays.

Results. The analysis revealed that a deep learning neural network is the most effective choice. For future developments, and after experimental confirmation, a recurrent neural network could also be a viable option.

Conclusion. The study confirmed that achieving the desired goal is not feasible using convolutional neural networks, large language models, random vector functional communication networks and radial-basis functional NNs.

Background. Current regulatory documents in the construction field often make it difficult to justify the use of innovative materials and technologies when submitting project documentation for review to the body makes the topic highly relevant.

Aim. Conduct an analysis of the principles and features of the asphalt concrete layers constructed using the Compact Asphalt technology. At the same time, to identify the main problems of introducing the Compact Asphalt technology into the road industry of the Russian Federation.

Methods. Various regulatory documents are considered regarding the requirements for the operational condition of highways and asphalt concrete mixtures. The authors’ articles on relevant topics were analyzed.

Results. Based on an analysis of the results of scientific and technical selection, as well as experience in applying the technology abroad, a conclusion was made about the feasibility of using this technology in the Russian Federation.

Background: This study discusses the use of wavelet transform for processing acoustic signals when diagnosing power transformers. A simulator with various defects was used to explore the application of continuous wavelet transform. The study also outlines an algorithm for obtaining signal standards to identify different types of defects.

Aim. To develop a mathematical model for constructing reference acoustic control signals when processing data from a simulator with various defects. These signals will be used to identify and diagnose defects in real power transformers during their operation.

Methods. The study introduces expressions for signal transformation, presents acoustic control signals, and explains the formation of reference signals. It also describes the process of recognizing the closest signals in form, corresponding to different types of defects.

Results. The key results include expressions for signal transformation, acoustic control signals, and the formation of reference signals. The closest matching signals were identified, enabling accurate recognition of different defect types.

Conclusion. The research proposes a method for processing acoustic control signals, allowing the reproduction of various insulation defects of power transformers and the recognition of such defects according to the proposed parameters of the wavelet transform.

Aim. To compare the magnetic characteristics and levitation force of single-cut and double-cut closed HTS rings.

Methods. Numerical calculations were performed using the finite element method in the Comsol Multiphysics software.

Results. The vertical magnetization profiles were obtained for single- and double-slit HTS rings magnetized under a gradient magnetic field and a permanent magnet's field. The normalized levitation force was analyzed based on the number of winding layers for both closed and nonclosed configurations. The nonclosed winding was found to generate the highest levitation force, namely 10% greater than that of a single-cut closed winding and nearly double that of a double-cut closed winding.

Conclusion. Numerical models were developed to simulate the magnetization process of closed-loop elements made from second-generation HTS tapes in the gradient field of a permanent magnet. The modeling was performed using the finite element method with both the magnetic field strength (H-formulation) and A-formulation (magnetic vector potential). Closed HTS ring systems with single and double cuts were analyzed. The models were verified by comparing the numerical results with experimental data obtained through scanning Hall magnetometry.

Aim. This work aims to increase the load-bearing capacity of tubular beams, allowing for a wider range of construction products.

Materials and Methods. The study utilizes geometric optimization methods and hypothetical experiments.

Results. A tubular beam with a liquid filler (hydraulic beam) is a round pipe, plugged at both ends, completely (without air pockets) filled with liquid. When the hydraulic beam is subjected to load, its side surface tends to deform. However, since the liquid inside is incompressible, it resists any reduction in volume. This resistance prevents the pipe from deforming under stress.

Conclusion. The load-bearing capacity of a hydraulic beam is five times higher than that of an I-beam and ten times higher than that of a tubular beam.

Background. A method is presented for analytically determining the optimal distribution of cargo flows during rock mass transportation by road, factoring in the given transportation distance. The key parameter for optimization is transport work, defined as the product of the volume of the rock mass and the transportation distance. This method involves exploring various cargo flow scenarios when developing wedge-shaped blocks, determining the transport work and optimizing it based on well-known mathematical methods. For this purpose, the extremum of the function is determined. As an alternative (additional), you can use the graphical method.

Aim. Reduce transportation costs for rock mass removal by optimizing road transport cargo flows.

Methods. Analytical methods, mathematical approaches to finding the extremum, methods of mathematical statistics.

Results. A methodology was developed to optimize rock mass cargo flows during the fan-shaped development of a field.

Conclusion. This study provides a foundation for determining the optimal distribution of rock cargo flows in fan-shaped field development. The proposed optimization technique can be used in other development systems with multiple transportation routes from one ledge.

Abstract. Recent changes in supply chains have significantly changed the structure and volume of rail freight transportation.

Aim. To adjust the calculation methods for freight transportation volumes and structure, considering railway throughput and carrying capacity.

Methods. They study utilized dynamic analysis of statistical data, an algorithm for determining the conditional cargo density in the transport and logistics complexes, and regional rail transportation forecasting until 2025.

Results. Key indicators such as “freight turnover,” “volume of freight transportation,” and “freight flow structure” were re-evaluated, incorporating the impact of “railway throughput and carrying capacity.” These findings are crucial for the planning and design of new rail infrastructure. The planned volumes of transportation and transshipment of the main types of cargo at port stations for the period 2024-2025 have been clarified, which makes it possible to increase the reliability of decisions made on the development of the railway infrastructure of the October Railway polygon, including approaches to sea ports and the North-South international transport corridor.