Herald of Dagestan State Technical University. Technical Sciences最新文献_第5页

CFD analysis of air flows and temperatures based on radiant heating in industrial environments 基于工业环境辐射供暖的气流和温度 CFD 分析

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2024-01-21 DOI: 10.21822/2073-6185-2023-50-4-166-174

E. Aralov, B. M. Kumitsky

{"title":"CFD analysis of air flows and temperatures based on radiant heating in industrial environments","authors":"E. Aralov, B. M. Kumitsky","doi":"10.21822/2073-6185-2023-50-4-166-174","DOIUrl":"https://doi.org/10.21822/2073-6185-2023-50-4-166-174","url":null,"abstract":"Objective. The study aims to investigate the complex interaction between radiant heating and airflow in industrial environments.The aim is to understand the dynamics of temperature, with particular attention to optimizing energy efficiency and comfort in industrial premises heated by a dual-zone dark gas radiant heater. Method. Using Computational Fluid Dynamics (CFD) and Ansis simulation software, the study developed a model that represents typical industrial conditions. This method included the determination and verification of temperature gradients and air velocity parameters, as well as careful mapping of the complexities of the industrial heating process. Result. The analysis provides detailed graphical representations of temperature and air velocity at individual points, revealing the effect of radiant heating on airflow patterns. Particular attention has been paid to how the temperature profiles interact with a dual-zone heating system, revealing important data that helps understand thermal dynamics in industrial environments. Conclusion. The findings demonstrate the potential for significant progress in energy savings and improved worker comfort in industrial environments using radiant heating. The integrated research approach fills a critical gap in existing research, highlighting the need and potential for further exploration of sustainable heating technologies in challenging industrial environments.","PeriodicalId":202454,"journal":{"name":"Herald of Dagestan State Technical University. Technical Sciences","volume":"18 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139609605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modern concrete composites for earthquake-resistant construction 用于抗震建筑的现代混凝土复合材料

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2024-01-21 DOI: 10.21822/2073-6185-2023-50-4-197-202

S. Murtazaev, S. G. Sheina, M. Saidumov, I. Murtazaev

引用次数: 0

Stability of a compressed-tensioned rod of variable cross-section with combined loading 可变截面压缩拉伸杆在组合载荷作用下的稳定性

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2024-01-21 DOI: 10.21822/2073-6185-2023-50-4-191-196

H. P. Kulterbaev, M. M. Payzulaev

引用次数: 0

The use of bituminous rocks and natural bitumens from a geonic point of view 从地质学角度看沥青岩和天然沥青的使用

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2024-01-21 DOI: 10.21822/2073-6185-2023-50-4-175-183

M. Vysotskaya, A. Kurlykina, V. A. Tokarev

{"title":"The use of bituminous rocks and natural bitumens from a geonic point of view","authors":"M. Vysotskaya, A. Kurlykina, V. A. Tokarev","doi":"10.21822/2073-6185-2023-50-4-175-183","DOIUrl":"https://doi.org/10.21822/2073-6185-2023-50-4-175-183","url":null,"abstract":"Objective. The purpose of the work is to study the experience of using bituminous rocks from various deposits for the preparation of hot asphalt concrete or extracting bitumen from rocks from the point of view of geonics. Method. The following research methods are used: systematization, description and analysis. The necessary data is formed on the basis of information obtained from the analysis of domestic and foreign articles related to the topic of natural bitumen and practical experience in extracting bitumen from tar sand for the preparation of hot asphalt concrete mixture using bituminous rocks without the use of petroleum bitumen from various fields. Result. Various works on the preparation of hot asphalt concrete and bitumen from bituminous rocks are considered. The results obtained showed that the use of bituminous rocks for the preparation of hot asphalt concrete and bitumen based on them is possible, and the properties of the resulting material comply with current quality standards. Conclusion. The dependence of the properties and chemical composition of the material on the deposit in which it was mined has been established.","PeriodicalId":202454,"journal":{"name":"Herald of Dagestan State Technical University. Technical Sciences","volume":"17 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139609751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the issue of ensuring secure access to information systems using biometric authentication based on a fuzzy image of the user’s identity and neural network transformations 关于利用基于用户身份模糊图像和神经网络转换的生物鉴别技术确保安全访问信息系统的问题

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2024-01-21 DOI: 10.21822/2073-6185-2023-50-4-75-84

O. I. Bokova, S. Kanavin, N. Khokhlov, I. V. Gilev, L. A. Lekar

{"title":"On the issue of ensuring secure access to information systems using biometric authentication based on a fuzzy image of the user’s identity and neural network transformations","authors":"O. I. Bokova, S. Kanavin, N. Khokhlov, I. V. Gilev, L. A. Lekar","doi":"10.21822/2073-6185-2023-50-4-75-84","DOIUrl":"https://doi.org/10.21822/2073-6185-2023-50-4-75-84","url":null,"abstract":"Objective. In modern conditions, cryptographic personal authentication technologies are used to access information systems, based on processing biometric information and converting the user’s biometric images into his personal access code. A current area of research is the use of neural network technologies in organizing secure access to information systems. Biometric authentication tools can be classified as highly reliable only if they include cryptographic authentication mechanisms that work together with biometric authentication mechanisms through the conversion of biometric images into a unique cryptographic access code; in this case, a set of biometric identifiers of the user’s identity form his fuzzy image, which is used later during authentication. The purpose of the study is to develop an algorithm for providing secure access to information systems using biometric authentication based on a fuzzy image of the user’s identity and neural network transformations. Method. The development of the algorithm is based on the use of fuzzy logic methods and neural networks. Result. The work reveals the features of biometric identification of the user of information systems. An algorithm is proposed for providing secure access to information systems using biometric authentication based on a fuzzy image of the user’s personality and neural network transformations. Conclusions. Based on two-step authentication of the user’s identity, secure access to the information systems of registered users is implemented. A listing of the program code in Python for creating and training a neural network of a bioidentifier classifier is provided. The materials of the article are of practical value for specialists in the field of providing secure access to information systems using artificial intelligence.","PeriodicalId":202454,"journal":{"name":"Herald of Dagestan State Technical University. Technical Sciences","volume":"22 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139609647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of methods for modeling operating modes of compressor equipment that ensures the operation of field low-temperature separation units 确保现场低温分离装置运行的压缩机设备运行模式建模方法分析

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2024-01-21 DOI: 10.21822/2073-6185-2023-50-4-6-16

M. A. Vorontsov, V. Y. Glazunov, A. S. Grachev, M. S. Mashtalir, S. A. Pospelov, A. V. Chernyshev

{"title":"Analysis of methods for modeling operating modes of compressor equipment that ensures the operation of field low-temperature separation units","authors":"M. A. Vorontsov, V. Y. Glazunov, A. S. Grachev, M. S. Mashtalir, S. A. Pospelov, A. V. Chernyshev","doi":"10.21822/2073-6185-2023-50-4-6-16","DOIUrl":"https://doi.org/10.21822/2073-6185-2023-50-4-6-16","url":null,"abstract":"Objective. A booster compressor station (BCS) is one of the key technological facilities necessary to ensure the effective operation of low-temperature separation technology for natural gas in field gas preparation systems for transportation. Ensuring promising operating modes of booster compressor stations with high efficiency is an urgent task. Method. One of the tools for solving this problem is mathematical modeling of the operating modes of centrifugal compressors (hereinafter - CPC), which are part of gas pumping units (GPU). The basis of the mathematical model is the gas dynamic characteristic (GDC) of the pulp and paper mill. The existing regulatory documentation presents simplified methods for modeling HDC, which are suitable for low-pressure pulp and paper mills with a pressure ratio of up to 1.5 and the number of compression stages of no more than three, but are not suitable for multi-stage high-pressure pulp and paper mills. Result. The results of a comparison of three methods of modeling the hydrodynamic characteristics (method of reduced characteristics, refined method of reduced characteristics, method of two-parameter approximation) of high-pressure pulp and paper mills are presented using the example of a pulp and paper mill with a pressure ratio of up to 2.0, intended for equipping a gas pumping unit as part of field booster compressor stations. An analysis and comparison of the obtained modeling results with actual data was carried out. Conclusion. When using the UMPH-2D modeling method, the smallest errors were obtained (no more than 2.0%), which, in turn, indicates its highest accuracy among the considered methods for recalculating the gas flow characteristics of high-pressure and multi-stage compressors.","PeriodicalId":202454,"journal":{"name":"Herald of Dagestan State Technical University. Technical Sciences","volume":"7 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139609742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prospects for the use of a membrane refrigeration unit for the production of cold as an alternative to absorption 使用膜制冷装置替代吸收式制冷的前景

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2024-01-21 DOI: 10.21822/2073-6185-2023-50-4-26-36

M. V. Shamarov, E. G. Stepanova, A. V. Kolinko, A. M. Shamarov

{"title":"Prospects for the use of a membrane refrigeration unit for the production of cold as an alternative to absorption","authors":"M. V. Shamarov, E. G. Stepanova, A. V. Kolinko, A. M. Shamarov","doi":"10.21822/2073-6185-2023-50-4-26-36","DOIUrl":"https://doi.org/10.21822/2073-6185-2023-50-4-26-36","url":null,"abstract":"Objective. The purpose of the study is to determine the prospects for using a membrane refrigeration unit for the production of cold as an alternative to absorption. Method. The study was carried out using a numerical experiment and verification of the results obtained on an experimental bench. Result. An analysis was made of the use of a traditional absorption refrigeration machine and a membrane refrigeration machine from the point of view of energy efficiency and the number of working elements. Presented for comparison are methods for calculating the separation process of the “absorbent-refrigerant” mixture based on reverse osmosis processes and a water-ammonia absorption refrigeration unit. Conclusion. The use of separation processes in membrane apparatuses for the production of cold in mixed refrigeration machines, as an alternative to absorption refrigeration machines, will ensure a more stable process for obtaining refrigerant from the mixture, reduce material costs for the production of a refrigeration unit and increase the energy efficiency of a refrigeration unit operating on mixed components.","PeriodicalId":202454,"journal":{"name":"Herald of Dagestan State Technical University. Technical Sciences","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139610294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Systems with optimal geometric shapes 具有最佳几何形状的系统

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2023-08-01 DOI: 10.21822/2073-6185-2023-50-2-188-196

A. K. Yusupov, H. Musеlеmov, R. I. Vishtalov

{"title":"Systems with optimal geometric shapes","authors":"A. K. Yusupov, H. Musеlеmov, R. I. Vishtalov","doi":"10.21822/2073-6185-2023-50-2-188-196","DOIUrl":"https://doi.org/10.21822/2073-6185-2023-50-2-188-196","url":null,"abstract":"Objective. In this paper, buildings of various shapes that have high seismic resistance are considered. Such seismic resistance is provided by the rational shape and outlines of the building itself. Here, the influence of the torsion of the building in the plan is minimized, thereby eliminating large stresses at the ends of the designed building. At the same time, the translational movement of the building in the plan is preserved.Method. By optimizing the shape and shape of buildings for various purposes, high efficiency of the structure is ensured under seismic effects. By comparing the shape and outlines of various buildings, the best variant of their layout is selected.Result. Structural schemes of buildings and structures with high resistance to seismic effects are given. A comparative analysis and recommendation for the design of earthquake-resistant buildings are given. Structural schemes for buildings and structures of various outlines have been developed: round, square, rectangular; constructive schemes of volumetric seismic-resistant structures, pyramidal, conical of various shapes, have been drawn up. Recommendations for the design of earthquake-resistant buildings and structures with optimal geometric shapes are made.Conclusion.The design schemes proposed in the article can be used in the design of earthquake-resistant buildings and structures for various purposes.","PeriodicalId":202454,"journal":{"name":"Herald of Dagestan State Technical University. Technical Sciences","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115593878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Model of trusted interaction of agents in decentralized cyber-physical environmentv 分散网络物理环境中agent可信交互模型

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2023-08-01 DOI: 10.21822/2073-6185-2023-50-2-134-141

V. Petrenko, F. Tebueva, I. Struchkov, S. Ryabtsev

{"title":"Model of trusted interaction of agents in decentralized cyber-physical environmentv","authors":"V. Petrenko, F. Tebueva, I. Struchkov, S. Ryabtsev","doi":"10.21822/2073-6185-2023-50-2-134-141","DOIUrl":"https://doi.org/10.21822/2073-6185-2023-50-2-134-141","url":null,"abstract":"Objective. The purpose of the work is to increase the efficiency of the functioning of agents of a cyber-physical system in the presence of agents with incorrect or malicious behavior. The goal is achieved by establishing a trusted interaction between agents and quick detection of malicious impact.Method. Trusted interaction is carried out using distributed ledger technology and agent confidence indicators. The novelty of the proposed solution lies in the fact that information about the actions of agents is stored and aggregated using smart contracts at specified time intervals. Each agent keeps a local copy of the agent interaction chain. If several agents interact with each other, then they exchange information stored in their copies of the ledger.Result. To test the proposed method, we implemented it in C++. For the experiments, the scenario of collective perception by agents of a decentralized cyber-physical environment in a specialized simulation program Contiki Cooja was used.Conclusion. The method implemented using the solutions proposed in this work showed higher efficiency than the method based on the dynamic calculation of the confidence index. The proposed solutions can be applied not only in cyber-physical systems, but also in any other systems with decentralized control. ","PeriodicalId":202454,"journal":{"name":"Herald of Dagestan State Technical University. Technical Sciences","volume":"1074 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122886452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formation of a system of requirements for ensuring information security at critical information infrastructure facilities in cooperation between the Russian Federation and the People’s Republic of China on the example of the Power of Siberia gas pipeline 以“西伯利亚力量”天然气管道为例，在俄罗斯联邦和中华人民共和国合作中形成确保关键信息基础设施信息安全的要求体系

Herald of Dagestan State Technical University. Technical Sciences Pub Date : 2023-08-01 DOI: 10.21822/2073-6185-2023-50-2-142-152

A. R. Semishkur, I. I. Livshits

{"title":"Formation of a system of requirements for ensuring information security at critical information infrastructure facilities in cooperation between the Russian Federation and the People’s Republic of China on the example of the Power of Siberia gas pipeline","authors":"A. R. Semishkur, I. I. Livshits","doi":"10.21822/2073-6185-2023-50-2-142-152","DOIUrl":"https://doi.org/10.21822/2073-6185-2023-50-2-142-152","url":null,"abstract":"Objective. The purpose of the study is an analytical review of the legislation for the formation of a system of requirements for ensuring and controlling information security at critical information infrastructure facilities in cooperation between the Russian Federation and the People’s Republic of China.Method. Reviewed using various benchmarking methods - historical, socio-cultural, legal to find similarities and differences in the approaches of partner countries on the issue of Critical Information Infrastructure.Result. Proposals have been made to improve Russian legislation regarding the management of information security at critical information infrastructure facilities.Conclusion. The direction of this study is very relevant and requires further development of organizational and technical measures to implement the requirements of legal documents on the protection of information at special-purpose informatization objects.","PeriodicalId":202454,"journal":{"name":"Herald of Dagestan State Technical University. Technical Sciences","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125505422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0