Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu最新文献

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Modeling the return on investment in human capital in the IT industry of Ukraine 乌克兰信息技术产业人力资本投资回报模型
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2024-02-29 DOI: 10.33271/nvngu/2024-1/191
A. Polchanov, N. Vyhovska, N. Valinkevych, I. Lytvynchuk, O. Polchanov
{"title":"Modeling the return on investment in human capital in the IT industry of Ukraine","authors":"A. Polchanov, N. Vyhovska, N. Valinkevych, I. Lytvynchuk, O. Polchanov","doi":"10.33271/nvngu/2024-1/191","DOIUrl":"https://doi.org/10.33271/nvngu/2024-1/191","url":null,"abstract":"Purpose. To identify patterns of return on investment in human capital in the IT industry of Ukraine through a quantitative assessment of the relationship between the income of IT specialists and the experience and other characteristics of the specialist and the company, as well as the formation of relevant recommendations. Methodology. The empirical basis of the study was a survey on the salary of IT specialists in Ukraine conducted in December 2022. The methodological basis of the study was general scientific and special research methods, in particular, the method of abstraction (to focus on the main determinants of the formation of IT specialists’ income), induction (to extrapolate the patterns found in the sample to the entire IT industry of Ukraine), economic mathematical modeling (for the construction of a multiple regression model that reflects the patterns of influence of factors on the income of IT specialists that exist in reality). Findings. It was established that among IT specialists people are predominant with little work experience (up to 5 years). The effect of experience on the growth rate of income has a decreasing non-linear nature, while the most noticeable increase in income is observed during the first years of work in the specialty. It was found that the highest-paid IT professionals are software development engineers, managers at various levels, and quality assurance engineers. It has been proven that the level of English proficiency has a positive effect on income. A higher level of remuneration for the work of IT specialists in product companies and startups compared to outsourcing or outstaffing companies has been established. Originality. It has been revealed that the relationship between the income of IT specialists and their work experience, profession, level of English language proficiency, and company type. Practical value. The applied value of the study lies in the ability to predict the income of IT specialists. The formed recommendations can be used in the activities of IT companies in terms of improving financial control over the spending of funds for the payment of services of IT specialists, assessing the feasibility of investing funds in personnel development, as well as substantiating the planned indicators of changes in the costs of paying for the services of IT specialists.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410523","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
Enhancement of sorption of the azoic dye (Azucryl Red) by natural and calcined hyper-aluminous kaolins 天然高岭土和煅烧高铝高岭土对偶氮染料(天青红)的吸附增强作用
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2024-02-29 DOI: 10.33271/nvngu/2024-1/105
A. Sekhri, L. Mahtout, A. Bouzidi, N. Bouzidi, M. Ferfar
{"title":"Enhancement of sorption of the azoic dye (Azucryl Red) by natural and calcined hyper-aluminous kaolins","authors":"A. Sekhri, L. Mahtout, A. Bouzidi, N. Bouzidi, M. Ferfar","doi":"10.33271/nvngu/2024-1/105","DOIUrl":"https://doi.org/10.33271/nvngu/2024-1/105","url":null,"abstract":"Purpose. To remove of basic textile dye Azucryl Red (AR) from aqueous solutions using hyper-aluminous kaolins from Charente deposits (France) in natural and calcined states. Methodology. Batch interactive parameter pH, pHpzc contact time, dye concentration, adsorbent loading and temperature are taken to obtain optimums for the AR adsorption process in natural and calcined kaolin named respectively Kca, Kcm, Ckca, and Ckcm. Findings. The adsorption equilibrium was established in 7 min while the second-order kinetic model better described the adsorption kinetics for all kaolins with the chemisorption process. The adsorption isotherm of the results obtained corresponds better to the Langmuir model. The maximum quantity retained was 67.97 and 73.38 mg/g respectively for Kcm and Kca samples. Moreover, in the calcined state, the maximum quantity retained was 76.66 and 75.64 mg/g respectively for the calcined kaolin CKcm and CKca samples for a temperature of 298 K and pH = 6. The thermodynamic nature of the adsorption process was determined by calculating H, S and G° values. The positive value of H° confirms the fact that adsorption is endothermic spontaneous which is enhanced at higher temperatures. Originality. The heat treatments of the different kaolins at 400 °C enhance the adsorption process. Therefore, the results indicate that Ckcm performed with the highest adsorption capacity in the removal of the dye, followed by Ckca. Practical value. Adsorption processes of toxic Azucryl Red dye in the aqueous medium using natural and calcined hyper-aluminous kaolins at 400 °C were investigated. Optimization and modeling of the adsorption parameters with the theories by Langmuir, Freundlich and Elovich allowed us to find the optimal experimental conditions for sorption. Our results therefore indicate that the adsorption process of Azucryl red dye from aqueous solutions was enhanced when calcined kaolin at 400 °C containing organic matters was used.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140408765","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
Testing the fragmentation of railway ballast material by laboratory methods using Proctor compactor 通过使用 Proctor 压实机的实验室方法测试铁路道碴材料的破碎情况
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2024-02-29 DOI: 10.33271/nvngu/2024-1/058
E. Huschek-Juhász, A. Németh, M. Sysyn, G. Baranyai, J. Liu, S. Fischer
{"title":"Testing the fragmentation of railway ballast material by laboratory methods using Proctor compactor","authors":"E. Huschek-Juhász, A. Németh, M. Sysyn, G. Baranyai, J. Liu, S. Fischer","doi":"10.33271/nvngu/2024-1/058","DOIUrl":"https://doi.org/10.33271/nvngu/2024-1/058","url":null,"abstract":"The physical classification of crushed stone and gravel used in railway construction is based on their strength and endurance and is performed by a laboratory test method using a rotating drum or a mortar method. The values of fracture resistance calculated using the Los Angeles method and abrasion calculated using the Micro-Deval method show a corresponding correlation and require further investigation. Purpose. The development of a new method for measuring rock material fracture that is consistent with widely used standards while also being more comparable to real-world railway operating conditions. Certainly, both standard tests are essential for ensuring product homogeneity during production, so the new recommended method is only a supplement. Methodology. The Proctor device was used to induce so-called shock loads from above, similar to railway loading conditions. Unlike the standard method, the andesite material was placed in a standard cylinder in these tests. The samples were pre-screened and sorted; the specified weight was approximately 1,300 g, and the specified sizes of the individual particles were 6.3, 8.0 and 11.2 mm. Only prewashed and dried materials of NZ (fine crushed stone) or KZ (special crushed stone) from four different quarries (Tállya, Szob, Nógrádkövesd, Recsk) with different rock physics characteristics were considered. The Proctor compactor machine was used because of its calculable labor (19.86 J/impact) and the crushing effect of the calculable impacts (64, 128, 256 and 1,028 blows). Even after loading different numbers of impacts, homogeneous samples from different quarries were sieved to measure the masses of fragments per fraction. Findings. The set of measurements made it possible to establish a series of fragmentation and degradation curves for each of the three repeated measurements based on the composition of the material and the number of blows, which showed the degradation of samples with different physical and mechanical properties of the rock material and particle sizes. With an increasing number of impacts, the amount of crushed material in the sample increased, but the distribution of crushed material did not decrease evenly and proportionally as the number of impacts increased. Parameters and indices were also computed to identify various correlations (i. e., FV, d < 22.4, d < 0.5, d < 0.063 mm, CU, M ratio,  ratio). Some of them (e. g., FV) needed to be changed, but they were predefined due to the nature of the tests. Originality. While many standard and alternative railway track ballast fragmentation test methods and measurement tools are available, this paper proposes a new laboratory method and demonstrates the specific measurement and application effectiveness. Practical value. In addition to standard tests that are already widely used, the new method for measuring the fractional composition of railway ballast can help simulate real-world operating conditions of a railroad track in the laboratory.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"2 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410671","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
Heuristic control of power consumption by up to 1000 V electrical loads at mining enterprises 矿业企业高达 1000 V 电力负载耗电量的启发式控制
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2024-02-29 DOI: 10.33271/nvngu/2024-1/084
O. Sinchuk, M. V. Rogoza, O. Y. Mykhailenko, D. Kobeliatskyi, V. Fedotov
{"title":"Heuristic control of power consumption by up to 1000 V electrical loads at mining enterprises","authors":"O. Sinchuk, M. V. Rogoza, O. Y. Mykhailenko, D. Kobeliatskyi, V. Fedotov","doi":"10.33271/nvngu/2024-1/084","DOIUrl":"https://doi.org/10.33271/nvngu/2024-1/084","url":null,"abstract":"Purpose. To develop a method for synthesizing the structure and algorithm of the system for automated control of power consumption by up to 1000 V electrical receivers at mining enterprises with iron ore underground mining methods. This enables direct control of the load connection to the industrial power grid to ensure minimum power costs depending on its cost per day ahead. Methodology. The problem of controlling power consumption of electrical receivers at iron ore underground mines is formalized as a binary form of mixed integer programming. To solve it, a binary implementation of the heuristic genetic algorithm is used. The mathematical modeling method analyzes the impact of genetic algorithm settings, such as the number of phenotypes in the population, the number of elite phenotypes that pass unchanged to the next generation, and the method of phenotype crossover on its quality. Findings. As a result of the research, it is found that the most effective way to control the process of power consumption based on an evolutionary genetic algorithm is to use the Laplace crossover function and keep the percentage of elite phenotypes in the population at 10 %. Moreover, at the smallest population size, the best accuracy is observed when using the Laplace function, while at one- and two-point crossover functions, it worsens, but not significantly (no more than 0.2 %). However, as the number of elite phenotypes increases, the duration of the evolutionary search in the control process is reduced by almost a factor of two in the case of one- and two-point crossovers. Originality. For the first time, the structure of a heuristic system for automated control of power consumption by underground electrical receivers with a supply voltage of up to 1000 V at iron ore underground mines has been developed on the basis of an evolutionary genetic algorithm. Depending on the designed volumes of ore production and the daily power cost per day, this allows determining the optimal power load schedule of underground distribution substations in advance, which, subject to the accepted limits on hourly and daily power, minimizes the cost of purchasing power, and thus reduces the cost of the final product. Practical value. The architecture of a heuristic system for controlling power consumption by electrical receivers with a voltage of up to 1000 V based on an evolutionary genetic algorithm is developed and recommended when optimizing the power load schedule of transformer substations of mining and metallurgical enterprises, in particular, of iron ore underground mines operating in this voltage class.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"64 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140411305","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
Digital economy: opportunities for transformation of entepreneurial structures 数字经济:企业结构转型的机遇
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2024-02-29 DOI: 10.33271/nvngu/2024-1/140
Z. Drinke, L. Mazhnyk, R. Zvirgzdina, T. Mokiienko, L. Holovash, H. Kryshtal
{"title":"Digital economy: opportunities for transformation of entepreneurial structures","authors":"Z. Drinke, L. Mazhnyk, R. Zvirgzdina, T. Mokiienko, L. Holovash, H. Kryshtal","doi":"10.33271/nvngu/2024-1/140","DOIUrl":"https://doi.org/10.33271/nvngu/2024-1/140","url":null,"abstract":"Purpose. To analyze the stages of digital transformation of entrepreneurial structures and identify the levels of transformation. Methodology. In the process of scientific research on the digital economy and the transformation of entrepreneurial structures, the following methods were utilized: expert assessment (involving experts from various fields of economic activity allowed for additional conclusions and recommendations regarding the possibilities of implementing digital technologies in entrepreneurial structures), scenario modeling (by developing various scenarios for the implementation of digital initiatives, the potential consequences and results of each were investigated), systems analysis (enabled considering the interrelations between various aspects of digital transformation and its impact on the economy and society as a whole), and marketing research (helped identify market needs and requirements for the implementation of digital solutions and products). Findings. The research considered the stages of digital transformation of entrepreneurial structures, which involve assessing the current state and readiness of the enterprise for the implementation of digital transformation; studying the potential offered by digital transformation and its effective implementation; investing in advanced digital technologies and the development of new digital products; designing and releasing products and services based on advanced digital technologies; controlling the transformed business and implementing advanced digital technologies and innovative business models. Advantages of digital transformation of business models are considered, which involve increasing the number of customers, enhancing customer satisfaction, increasing lead generation, traffic growth. The authors identified six levels of “digital transformation” of entrepreneurial structures, describing the stages of changes in business models caused by digital transformations: unsystematic level, opportunities monitoring, replicable level, results-driven, achieved controlling, and optimized level. Originality. A stage of digital transformation of entrepreneurial structures has been proposed: controlling the transformed business and implementing advanced digital technologies, which allows tracking the implementation of the strategy and achieving goals in the context of digital development. The authors highlighted such stages of digital transformation of entrepreneurial structures as opportunities monitoring and achieved controlling, which, unlike those existing in the scientific community, play a key role in the path of digital transformation of entrepreneurial structures. Practical value. The analysis conducted confirms the relevance of issues related to the digital transformation of entrepreneurial structures, the formation of changes in views on stages and levels of digital transformation in accordance with current trends and uncertain conditions. The research results can be taken into ac","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"10 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410446","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
Implementation of corporate social responsibility in the context of integration with the enterprise management information system 在与企业管理信息系统整合的背景下履行企业社会责任
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2024-02-29 DOI: 10.33271/nvngu/2024-1/154
R. Volchek, H. Moskaliuk, L. Halan, O. Dancheva
{"title":"Implementation of corporate social responsibility in the context of integration with the enterprise management information system","authors":"R. Volchek, H. Moskaliuk, L. Halan, O. Dancheva","doi":"10.33271/nvngu/2024-1/154","DOIUrl":"https://doi.org/10.33271/nvngu/2024-1/154","url":null,"abstract":"Purpose. To develop recommendations for the corporate digital responsibility (CDR) strategy aimed at increasing the level of integration of corporate social responsibility (CSR) and information systems (IS) of the company. To develop a mathematical model of coordination decisions regarding CSR with production and business activities of companies. Methodology. The introduction of the methods of: logical generalization made it possible to define CDR adapted to Ukrainian realities; analysis and synthesis – to point out the need to integrate CSR with IS; comparative analysis – to determine directions, tasks, requirements for the implementation of CDR; logical abstraction – to substantiate the need to implement strategy for CDR implementation, develop its stages, tasks and goals of each stages; mathematical analysis – to develop mathematical model of coordination of management decisions. Findings. A definition of CDR, adapted to Ukrainian reality, which became the conceptual basis of the presented research, is proposed. The need for integration of CSR and IS and the formation of a new mechanism – CDR, as a result of the evolution of CSR, is substantiated. The directions, tasks, and requirements for the implementation of CDR are defined. The need to implement the strategy for the implementation of CDR are substantiated, its stages, tasks and goals of each stage are developed. It is indicated that the integration of CSR and IS can take place iteratively, with management gaining experience and finding optimal methods and tools. Originality. A mathematical model that allows one not only to coordinate various management decisions, but also to forecast their short-term and long-term results, is developed. Practical value. The proposed approach to CDR strategy formation will increase the effectiveness of CDR and improve the integration of CSR and IS. The developed mathematical model will allow one not only to solve the problem of coordination of management decisions, but will also help to economically spend IT resources and speed up the delivery of results.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"14 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140412158","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
The choice of optimal methods for the development of water wells in the conditions of the Tonirekshin field (Kazakhstan) 在托尼雷克申(Tonirekshin)油田条件下开发水井的最佳方法选择(哈萨克斯坦
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2024-02-29 DOI: 10.33271/nvngu/2024-1/013
M. Biletskiy, B. Ratov, V. Khomenko, A. Borash, S. Muratova
{"title":"The choice of optimal methods for the development of water wells in the conditions of the Tonirekshin field (Kazakhstan)","authors":"M. Biletskiy, B. Ratov, V. Khomenko, A. Borash, S. Muratova","doi":"10.33271/nvngu/2024-1/013","DOIUrl":"https://doi.org/10.33271/nvngu/2024-1/013","url":null,"abstract":"Purpose. Scientific substantiation of the application of technology for the development of water wells in the conditions of the Tonirekshin field of the Mangystau Peninsula. Methodology. The tasks were solved by a complex research method, which includes a review and generalization of literary and patent sources, analytical studies on existing methods for the development of water wells and their interpretation in relation to the geological and technical conditions of the Tonirekshin groundwater field. Findings. The main exploitable aquifers that are part of the Tonirekshin groundwater field are considered and a critical analysis of information on the geological and hydrogeological features of the basin is made. The requirements for the process of development of water wells for the field conditions are formulated. Well-known advanced well development methods are analyzed. Their advantages, disadvantages and compliance with the requirements are revealed. The implosion method was chosen as the best method for the development of water wells in the conditions of the Tonirekshin field. Originality. For the first time, for the geological and technical conditions of the Tonirekshin groundwater field, using the method of expert assessments, the choice of the optimal method for the development of water wells has been scientifically substantiated, which ensures decolmatation of the near-wellbore zone and the maximum flow rate of high-quality water for domestic and drinking water supply. Practical value. For the specific geological and technical conditions of the Tonirekshin groundwater field, the most suitable method for the development of water wells was chosen – the implosion method. The application of this method will provide a significant increase in well flow rate and a solution to the problem of oasis irrigation of lands in the Beineu district of the Mangystau region (Kazakhstan).","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"34 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140412210","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
Investment principles in value-target processes of electricity consumption at iron ore enterprises 铁矿石企业用电价值目标过程中的投资原则
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2023-12-23 DOI: 10.33271/nvngu/2023-6/169
T. Beridze, Z. Baranik, S. Tkachenko, N. Kutova, O. Korolenko
{"title":"Investment principles in value-target processes of electricity consumption at iron ore enterprises","authors":"T. Beridze, Z. Baranik, S. Tkachenko, N. Kutova, O. Korolenko","doi":"10.33271/nvngu/2023-6/169","DOIUrl":"https://doi.org/10.33271/nvngu/2023-6/169","url":null,"abstract":"Purpose. To establish the influence of investment on cost-target processes of electric consumption of iron ore enterprises by applying economic and mathematical models. Methodology. As a result of the research, system and critical analysis was applied in the synthesis of formation of economic and analytical indicators and processes of electricity consumption at iron ore enterprises. Methods of comparative analysis, functional-cost, economic-statistical research were used to determine cost-target characteristics when building economic-mathematical models. The general basis of the conducted study is a complex approach. Findings. The capitalization of relations in Ukraine requires a more careful organization of the practice of investing, in relation to the cost policy of electricity consumption at industrial enterprises in Ukraine. When mining iron ore, optimal matching of the cost of electricity consumption and investment investments, which make it possible to ensure the necessary volumes of production, is of great importance. Due to this, in modern conditions, the necessary digital support of investment processes is of great importance. An economic-mathematical model of the impact of investments on the cost-target problems of electric energy consumption is developed, which allows numerically determining the interrelationship of the selected indicators. The combination of theoretical study with practical implementation made it possible to investigate the conditions under which there is the best ratio of investment investments and the cost of electricity consumption. Originality. The method of influencing investment on the cost of electricity consumption by iron ore enterprises has received further development. An economic-mathematical model has been constructed that allows the proposed method to be implemented. Practical value. The analysis of the results of the cost of electricity consumption at iron ore enterprises allows us to estimate the statistical dependence of the cost of electricity consumption on the amount of investment. The conducted analysis made it possible to investigate the dependence of the values of the total average daily costs of consumed electricity, the cost of consumed electricity, the specific cost of electricity consumption on the amount of investment contributions at the enterprises of Kryvyi Rih Iron Ore Combine on the basis of regression models. It is expedient to determine the question of choosing an optimization option on the basis of an analysis of the real economic situation in accordance with the volume and cost of electricity consumption at iron ore enterprises. The practice of applying the proposed research results makes it possible to determine the most optimal option for energy efficiency management.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"168 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139161162","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
Problems of operating heating boilers of increased environmental efficiency 提高环保效率的供暖锅炉的运行问题
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2023-12-23 DOI: 10.33271/nvngu/2023-6/054
N. Fialko, R. Navrodska, S. Shevchuk, R. V. Serhiienko
{"title":"Problems of operating heating boilers of increased environmental efficiency","authors":"N. Fialko, R. Navrodska, S. Shevchuk, R. V. Serhiienko","doi":"10.33271/nvngu/2023-6/054","DOIUrl":"https://doi.org/10.33271/nvngu/2023-6/054","url":null,"abstract":"Purpose. Ensuring reliable operation of heating heat-generating devices with recirculation and exhaust gas heat recovery. Methodology. The normative methods of thermal calculation for surface heat exchange devices and the software according to the requirements of regulatory methods for this type of equipment for processing the results of our own experimental studies on heat exchange during deep cooling of combustion products of gas-consuming boilers were used. Findings. Calculation studies on the thermal operation modes during the heating period under the conditions of recirculation and heat recovery of flue gases of gas-fired water-heating boiler plants not equipped with air heaters were carried out. The main characteristics were determined of the thermal and humidity operation state for the air-supply ducts of these installations under the conditions of recirculation of flue gases’ part into the blown air. Regularities of temperature and dew point changes in the mixture of admixed gases and air under the conditions of using traditional heat recovery technologies and without them in different boiler modes and with different parts of recirculated gases were established. Problems of ensuring the operability and reliability of such boiler plants are highlighted. It is shown that these problems are related to condensate formation on the internal surfaces of air ducts and their freezing in some operating modes during in the cold period of the heating season. It is also shown that an effective solution to existing problems can be the use of air heaters in heat recovery systems to preheat the blown air before its mixing with recirculation gases. Originality. For the first time, the thermal and humidity operation modes of the air-supply ducts of heating boiler plants with increased environmental efficiency, which is ensured by boiler exhaust gases recirculation into the blown air, have been investigated. Practical value. The obtained research results will be used in the design of systems of recirculation and heat recovery of heat-generating devices’ exhaust gases to improve their environmental and thermal efficiency.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"20 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139161272","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
Development of digital infrastructure and blockchain in Ukraine 乌克兰数字基础设施和区块链的发展
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu Pub Date : 2023-12-23 DOI: 10.33271/nvngu/2023-6/162
N. Ushenko, V. Metelytsia, I. Lytovchenko, M. Yermolaieva, V. Sharmanska, I. Klopov
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