The article discusses the use of a recurrent neural network in the problem of forecasting pollutants in the air based on actual data in the form of a time series. A description of the network architecture, the training method used, and the method for generating training and testing data is provided. During training, a data set consisting of 126 measurements of various components was used. As a result, the quality of the conclusions of the resulting model was assessed and the averaged coefficients of the MSE metric were calculated.

Keywords: air pollution, forecasting, neural networks, machine learning, recurrent network, time series analysis

A semi-Markov stationary model of operation of measuring instruments installed on complex technical systems is developed, which allows modelling the process of metrological maintenance of measuring instruments at combined verification and operational automated condition control. The results of modelling are presented.

Keywords: semi-Markov model, measuring instrument, verification, operational automated state control

The paper presents an ordinary and dynamic piecewise linear Leontief model with nonlinear predictors for the gross domestic product of Russia. The following variables are used as independent variables: the number of able-bodied population, retail trade turnover, and capital investment. In the right part of the model, along with the current value of investment volume, its lagged values with a lag of one and two years are included. The average relative error of approximation of each model and the values of the vector of triggers of independent variables were calculated.

Keywords: Leontief model, nonlinear predictors, gross domestic product, least modulus method, average relative approximation error, vector of triggers, linear-Boolean programming problem

Using numerical modeling, a study of heat transfer and hydrodynamics in plate heat exchangers with corrugated fins was carried out, while the height of the corrugation profile varied from 2 to 4 mm. The influence of profile height on heat flow and pressure drop was studied. It was revealed that an increase in the profile height leads to an increase in heat flow up to 34.05% and pressure drop up to 54.54%.

Keywords: corrugated heat exchanger, cooling system, microelectronics, profile height, heat flow, pressure drop, heat transfer, hydrodynamics, calculation, numerical modeling

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

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

Radon is a chemically inert radioactive gas with daughter decay products (DPR) in the form of alpha particles. Radon flux density studies were conducted in the Komarovo residential complex in the Sovetsky district of Volgograd in April 2024 on an area of approximately 0.3 km2. The purpose of the study was to study the radon flux density on a land plot in the Komarovo residential complex (Sovetsky district, Volgograd) in April 2024. Research objectives: 1. Measurement of the radon flux density level at the study points. 2. Statistical processing of the obtained results. 3. Forecasting of radon hazard of a land plot in the residential complex "Komarovo". Research methods and equipment. The method of measuring the radon flux density from the ground surface using Alfarad-Plus (Russia) was used. The authors found an excess of the average values of the radon flux density in the Komarovo residential complex by 5 times compared with the data of the standard values of the radon flux (80 MBq/m2*s). Moreover, spot emissions of radon gas of abnormal values reaching 3945 MBq/m2*s were recorded in the studied area, and in the southwestern part of the residential complex there is a zone with the highest values of PP> 80 MBq/m2*s. There is no anthropogenic factor in the form of radioactive contamination. These facts indicate signs of natural radon pollution of the land and problems of environmental safety of the urbanized territory, which requires operational engineering and environmental measures to develop protective measures against radon danger in the residential complex "Komarovo".

Keywords: radon, radon flux density, radioactive contamination, radon hazard, radon risks, daughter products of radon decay, alpha particles, urban areas, residential complexes, lung cancer

This article highlights the theoretical results of analytical research in the field of the use of tethered balloons as carriers of barrier networks, which can be used as passive protection of particularly important civil and industrial facilities from unmanned aerial vehicles and other low-flying means of air attack. A diagram of an aerostatic barrier system, theoretically capable of countering air attack means, is presented. The elements of the methodology for determining the probability of damage to aircraft from cable type air barriers are presented.

Keywords: aerostatic air barrier system, unmanned aerial vehicles, tethered balloons, aerial protection of ground objects

This paper explores in detail the technological evolution and current state of question and answer (Q&A) systems. Using an example of an airline customer service task, a BERT-based model is developed that is capable of recognising user intentions and extracting named entities. The paper provides a detailed description of the dataset preparation, data analysis methods and data exploration techniques of the project. A description of the model and parameter settings during the model tuning process and the model training process is presented. The model developed in this project is named RNEEMAviCS-BERT, which achieved an intent recognition accuracy of 98.2% and named entity recognition accuracy of 83%. We have created a semantic analysis module for the question and answer system. The next stage of our work will be to integrate the dataset to complete the query-response and response generation components of the Q&A system.

Keywords: question-answering systems, ChatGPT, BERT, machine learning, neural networks, pre-trained models, intention recognition, named entity recognition, data analysis, model training

Technological pipelines of compressor stations are one of the significant types of basic equipment that ensures uninterrupted operation during gas transportation. In this article, we paid special attention to the issue of safe operation of the pipeline strapping of the gas treatment plant for transportation, which is designed to dry gas to the required parameters required by consumers and is one of the main technological units of the compressor station. During the operation of the adsorber lines with "hot" and "cold" gases, the pipelines of the regeneration line are subjected to high variable temperature loads. Thus, the operating organization faces the problem of ensuring sufficient compensation for the linear expansion of technological pipelines during their periodic heating. The calculation of the service life of the piping and its stability with a matched axial bellows compensator has been performed. Various solutions to the reliability problems of these compressor station components are considered and analyzed. It is concluded that it is necessary to update the regulatory design framework and introduce continuous technical monitoring methods into the operated facilities.

Keywords: gas treatment plant, process pipeline, adsorber, safe operation period, temperature load, compensator