Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.30-35
I. Trunina, O. Usanova, A. Chumakova
Purpose. The article considers and analyzes the main definitions of the concept of «City brand». The main reasons that explain the need to create a city brand are given, among which the main ones are: increased competition, urbanization of cities, development of Tourism, self-government and local financing. The relationship between the city's brand and its identity is analyzed. The main parameters that measure the strength and weakness of the city's identity and the level of local identity to one degree or another are presented. Methodology. It is determined that despite a significant number of scientific developments, questions about the theoretical content of the definition of «City brand» and the formation of components of the city brand remain debatable. For a more detailed analysis, the city of Kremenchuk was taken. This city has a strong industrial and economic potential, which is characterized by a high level of development of heavy industry and a variety of industries, industries and activities. Industry plays an important role in the development of the city of Kremenchuk. The leading industries of the city are: oil refining and chemical, mining, Mechanical Engineering, Food and light. Results. In the course of the research, the concept of the city brand was considered. The study revealed what an important role it plays in our lives. The differences between the brand and the city's identity were considered. Originality. The functions of the brand and the goals of its promotion are investigated. It is established that the formation of an optimal organization for the development of marketing Territories allows you to create a positive image of the territory, ensure its attractiveness (investment and tourism); more efficiently use its internal potential due to trust in the authorities as the main carrier of a positive image of the territory; develop and implement a consistent marketing strategy for the socio-economic development of the territory. Practical value. The prospects for further research are to assess the economic potential for forming the territory's brand (using the example of the city of Kremenchuk). The main tasks and activities that are being implemented in the city of Kremenchuk, and which can be effective on the way to creating a high-quality and effective delirium of Kremenchuk, are analyzed.
{"title":"ANALYSIS OF THE DEFINITION OF CITY BRAND FORMATION","authors":"I. Trunina, O. Usanova, A. Chumakova","doi":"10.30929/1995-0519.2021.5.30-35","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.30-35","url":null,"abstract":"Purpose. The article considers and analyzes the main definitions of the concept of «City brand». The main reasons that explain the need to create a city brand are given, among which the main ones are: increased competition, urbanization of cities, development of Tourism, self-government and local financing. The relationship between the city's brand and its identity is analyzed. The main parameters that measure the strength and weakness of the city's identity and the level of local identity to one degree or another are presented. Methodology. It is determined that despite a significant number of scientific developments, questions about the theoretical content of the definition of «City brand» and the formation of components of the city brand remain debatable. For a more detailed analysis, the city of Kremenchuk was taken. This city has a strong industrial and economic potential, which is characterized by a high level of development of heavy industry and a variety of industries, industries and activities. Industry plays an important role in the development of the city of Kremenchuk. The leading industries of the city are: oil refining and chemical, mining, Mechanical Engineering, Food and light. Results. In the course of the research, the concept of the city brand was considered. The study revealed what an important role it plays in our lives. The differences between the brand and the city's identity were considered. Originality. The functions of the brand and the goals of its promotion are investigated. It is established that the formation of an optimal organization for the development of marketing Territories allows you to create a positive image of the territory, ensure its attractiveness (investment and tourism); more efficiently use its internal potential due to trust in the authorities as the main carrier of a positive image of the territory; develop and implement a consistent marketing strategy for the socio-economic development of the territory. Practical value. The prospects for further research are to assess the economic potential for forming the territory's brand (using the example of the city of Kremenchuk). The main tasks and activities that are being implemented in the city of Kremenchuk, and which can be effective on the way to creating a high-quality and effective delirium of Kremenchuk, are analyzed.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124923820","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.36-41
O. Trus, Eduard Prokopenko, Tetyana Polishchuk
Purpose. It is established that biological activity is one of the main indicators of soil fertility and it plays an important role in the cycle of nutrients, in their availability to plants. Methodology. Based on the analysis of literature sources, the article presents the results of scientific research of domestic and foreign authors on the patterns of passage in the soil microbiological processes in intensive land use. Findings. The mineral and organic composition of the soil and its physicochemical state regulate the number and composition of microbiocenoses, which include bacteria, fungi, protozoa and bacteriophages. The microflora is used as an indicator to determine the direction of over flow in the soil of such processes as the rate of humification and mineralization of humus, the growth of unproductive losses of nitrogen gas in the processes of denitrification and nitrification, the accumulation of nitrates in the soil. The process of humification depends on the amount of microflora involved in the synthesis and decomposition of humus. The rate of carbon dioxide release allows you to assess objectively the intensity of the process of mineralization of organic matter. Mycorrhizal fungies are important in the soil ecosystem, as they play a key role in the close relationship between plants and soil. Soil bacteria (bacilli) can be used as an indicator of the depth of development of the soil formation process. Originality. The peculiarity of the soil microorganisms is their ability to decompose complex macromolecular compounds into simple final products. With the change of nutrient, air and water regimes during the intensive agriculture, the anthropogenic impact on the soil increases. Practical value. The application of mineral and organic fertilizers in sufficient quantities provides the plant with nutrients that are the sources of nutrition for microorganisms in the soil and the energy for biochemical processes taking place in it. It was studied that the application of manure, straw, cereals and greens leads to an increase in total biological activity of the soil by 8.24 %, activates the flow of microbiological and biochemical processes in the soil, increases the intensity of carbon dioxide by 1.7–2.5 times. The use of mineral fertilizers slows down the microbiological and cellulosolytic processes of mineralization of organic residues and the development of soil biota. The combined use of organic and mineral fertilizers makes it possible to achieve maximum values of soil nitrification capacity, carbon dioxide emissions and the intensity of decomposition of linen. References 29.
{"title":"BIOLOGICAL ACTIVITY OF SOIL, ITS IMPORTANCE FOR SOIL FERTILITY AND PLANT NUTRITION","authors":"O. Trus, Eduard Prokopenko, Tetyana Polishchuk","doi":"10.30929/1995-0519.2021.5.36-41","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.36-41","url":null,"abstract":"Purpose. It is established that biological activity is one of the main indicators of soil fertility and it plays an important role in the cycle of nutrients, in their availability to plants. Methodology. Based on the analysis of literature sources, the article presents the results of scientific research of domestic and foreign authors on the patterns of passage in the soil microbiological processes in intensive land use. Findings. The mineral and organic composition of the soil and its physicochemical state regulate the number and composition of microbiocenoses, which include bacteria, fungi, protozoa and bacteriophages. The microflora is used as an indicator to determine the direction of over flow in the soil of such processes as the rate of humification and mineralization of humus, the growth of unproductive losses of nitrogen gas in the processes of denitrification and nitrification, the accumulation of nitrates in the soil. The process of humification depends on the amount of microflora involved in the synthesis and decomposition of humus. The rate of carbon dioxide release allows you to assess objectively the intensity of the process of mineralization of organic matter. Mycorrhizal fungies are important in the soil ecosystem, as they play a key role in the close relationship between plants and soil. Soil bacteria (bacilli) can be used as an indicator of the depth of development of the soil formation process. Originality. The peculiarity of the soil microorganisms is their ability to decompose complex macromolecular compounds into simple final products. With the change of nutrient, air and water regimes during the intensive agriculture, the anthropogenic impact on the soil increases. Practical value. The application of mineral and organic fertilizers in sufficient quantities provides the plant with nutrients that are the sources of nutrition for microorganisms in the soil and the energy for biochemical processes taking place in it. It was studied that the application of manure, straw, cereals and greens leads to an increase in total biological activity of the soil by 8.24 %, activates the flow of microbiological and biochemical processes in the soil, increases the intensity of carbon dioxide by 1.7–2.5 times. The use of mineral fertilizers slows down the microbiological and cellulosolytic processes of mineralization of organic residues and the development of soil biota. The combined use of organic and mineral fertilizers makes it possible to achieve maximum values of soil nitrification capacity, carbon dioxide emissions and the intensity of decomposition of linen. References 29.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115566357","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.4.68-73
T. Haikova, V. Kulynych
Purpose. The work purpose is to increase the efficiency in the manufacturing technological equipment shops for pro-curement and stamping production on the basis of creating an optimal process of reconfiguration of equipment when changing the range of machined parts of equipment. Methodology. Cluster analysis, as a way of grouping multidimen-sional objects, is based on the presentation of the results of individual observations by points in the required geometric space. Logical connections between technical-technological and constructive signs of details and requirements to adjustment of the machine. Findings. The classifier presence of manufactured products allows to determine the typical values of the tool output required for the product elements processing. By unifying the value of the end tool departure in accordance with the typical values of the workpiece height, it is possible to eliminate the need to change the tool setting composition when switching to a new planning unit and the task of the tool production time correcting. The smaller the unique range of tools, the faster production can be rebuilt for a new order. Originality. The introduction into the functional dependence of the end mill cutter on its geometrical parameters - the ratio of the departure length to the length of the cutting part from 0.1 to 0.5 to take into account the influence of cross-section inhomogeneity is substantiated. Practical value. Having an idea of the parts design and technological features, they can be grouped by the homogeneity of the features by cluster analysis to achieve a minimum of readjustment. Conclusions. Logical connections between technical-technological and structural details features and requirements to machine tool adjustment which allowed to present a method of planning units grouping on technical-technological features commonality, such as necessary equipment, devices and tools, by means of cluster analysis for reducing the transition time to a new product and, consequently, downtime. The equation for determining the end mill cutter in the tangential cutting force direction has been modified taking into account the cross section inhomogeneity, tool geometry, and machine rigidity, which allows to unify the tool setting for the end tool departure by determining the footprint and error the machined contour. References 15, figures 4.
{"title":"IMPROVING THE WORK EFFICIENCY IN THE WORKSHOPS FOR THE TECHNOLOGICAL EQUIPMENT MANUFACTURE FOR PROCUREMENT PRODUCTION","authors":"T. Haikova, V. Kulynych","doi":"10.30929/1995-0519.2021.4.68-73","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.4.68-73","url":null,"abstract":"Purpose. The work purpose is to increase the efficiency in the manufacturing technological equipment shops for pro-curement and stamping production on the basis of creating an optimal process of reconfiguration of equipment when changing the range of machined parts of equipment. Methodology. Cluster analysis, as a way of grouping multidimen-sional objects, is based on the presentation of the results of individual observations by points in the required geometric space. Logical connections between technical-technological and constructive signs of details and requirements to adjustment of the machine. Findings. The classifier presence of manufactured products allows to determine the typical values of the tool output required for the product elements processing. By unifying the value of the end tool departure in accordance with the typical values of the workpiece height, it is possible to eliminate the need to change the tool setting composition when switching to a new planning unit and the task of the tool production time correcting. The smaller the unique range of tools, the faster production can be rebuilt for a new order. Originality. The introduction into the functional dependence of the end mill cutter on its geometrical parameters - the ratio of the departure length to the length of the cutting part from 0.1 to 0.5 to take into account the influence of cross-section inhomogeneity is substantiated. Practical value. Having an idea of the parts design and technological features, they can be grouped by the homogeneity of the features by cluster analysis to achieve a minimum of readjustment. Conclusions. Logical connections between technical-technological and structural details features and requirements to machine tool adjustment which allowed to present a method of planning units grouping on technical-technological features commonality, such as necessary equipment, devices and tools, by means of cluster analysis for reducing the transition time to a new product and, consequently, downtime. The equation for determining the end mill cutter in the tangential cutting force direction has been modified taking into account the cross section inhomogeneity, tool geometry, and machine rigidity, which allows to unify the tool setting for the end tool departure by determining the footprint and error the machined contour. References 15, figures 4.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117027056","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.89-96
R. Ignatyuk, O. Ryzhyi, L. Serilko, Oleksandr Stadnyk, D. Serilko
Purpose. The substantiation of the mathematical model of mechanical deformation of the elastic-plastic medium and the modeling of the transport process of the expansion assemblies. Methodology. Mathematical and theoretical studies were based on the fundamental theory of continuum mechanics and general positions of engineering mechanics. Analytical and graphical analysis of mathematical models carried out on a PC in a specialized software complex. Results. In the current conditions of economic development of the country, considerable attention should be paid to the development and modernization of certain sectors of the economy. Significant amounts of work, which are accompanied by the development of soil of different properties, which can be defined as an elastic-plastic material. These studies will solve a number of problems that are acute not only in agriculture but also in construction, in the open pit mining, reclamation, one of which is an imperfect process of loosening the soil during its cultivation. Therefore, the urgent problem is to establish rational parameters of the transport surface of the unit for loosening the elastic-plastic material. The developed mathematical model allows determining the emerging stress, which in turn determines the boundary of the destruction of the elastic-plastic material. In the design of lining assemblies, it is advisable to have a radius of the outlet section R = 0.18 m or more. Originality. The mathematical models for the process of destruction of elastic-plastic material and forecasting of optimal transport parameters for designing of expansion assemblies are obtained. Practical value. The developed mathematical model will provide an improvement in the process of loosening elastic-plastic material, and engineering calculations during the design of the rutter can prevent unwarranted increase in resistance, with displaced materials on the cutting surface. References 10, figures 8.
{"title":"JUSTIFICATION OF TRANSPORT PARAMETERS AND MODELING OF THE PROCESS OF DESTRUCTION OF THE ELASTIC-PLASTIC ENVIRONMENT","authors":"R. Ignatyuk, O. Ryzhyi, L. Serilko, Oleksandr Stadnyk, D. Serilko","doi":"10.30929/1995-0519.2021.5.89-96","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.89-96","url":null,"abstract":"Purpose. The substantiation of the mathematical model of mechanical deformation of the elastic-plastic medium and the modeling of the transport process of the expansion assemblies. Methodology. Mathematical and theoretical studies were based on the fundamental theory of continuum mechanics and general positions of engineering mechanics. Analytical and graphical analysis of mathematical models carried out on a PC in a specialized software complex. Results. In the current conditions of economic development of the country, considerable attention should be paid to the development and modernization of certain sectors of the economy. Significant amounts of work, which are accompanied by the development of soil of different properties, which can be defined as an elastic-plastic material. These studies will solve a number of problems that are acute not only in agriculture but also in construction, in the open pit mining, reclamation, one of which is an imperfect process of loosening the soil during its cultivation. Therefore, the urgent problem is to establish rational parameters of the transport surface of the unit for loosening the elastic-plastic material. The developed mathematical model allows determining the emerging stress, which in turn determines the boundary of the destruction of the elastic-plastic material. In the design of lining assemblies, it is advisable to have a radius of the outlet section R = 0.18 m or more. Originality. The mathematical models for the process of destruction of elastic-plastic material and forecasting of optimal transport parameters for designing of expansion assemblies are obtained. Practical value. The developed mathematical model will provide an improvement in the process of loosening elastic-plastic material, and engineering calculations during the design of the rutter can prevent unwarranted increase in resistance, with displaced materials on the cutting surface. References 10, figures 8.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123135381","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.97-102
Y. Trotsenko, O. Protsenko, Artem Nesterko, V. Chyzhevskyi, V. Mykhailenko
Purpose. The method for calibrating an experimental installation for studying the patterns of partial discharges aris-ing in samples of paper insulation having low capacitance was developed. Methodology. In order to verify the proposed method, a physical experiment was carried out in a high-voltage laboratory to measure partial discharge parameters using a digital oscilloscope. Free software for circuit simulation was used to create high-pass filter schematics. Results. The task of calibrating the systems for measuring partial discharges of low capacitance insulation samples (for example, ranging from 1 pF to 5 pF) is characterized by high complexity, because the calibration capacitor must have a capacitance an order of magnitude smaller than the capacitance of the test sample (from 0.1 pF to 0.5 pF, accordingly), which sometimes cannot be achieved practically. Moreover, in such case the stray capacitance will obviously be of the same order as the capacitance of calibration capacitor, or even greater. In such cases traditional calibration circuits where calibration generator is connected in parallel with the test object cannot be applied. Originality. Alternate calibration circuit was proposed, implemented and tested in the work, where the calibration generator is connected in series with test object. Practical value. Studies of the proposed calibration method have shown that it can be used quite effectively in cases when test object have low capacitance. The results of recording the calibration pulses showed that they can be reliably recorded and measured with a minimum error (oscilloscope error), and errors associated with parasitic parameters of the recording circuit are automatically taken into account when calibrating by this method and do not require additional adjustments. Conclusions. There is a possibility to increase the sensitivity of the measuring circuit to 0.05 pC/V, primarily by increasing the gain of the oscilloscope at least 100 times without repeating the calibration procedure. This will make it possible to study insulation samples of fairly high quality in which the level of partial discharges is much lower than in those samples used in this work. The experimental installation can be used to analyze different ways of modeling partial discharges on a personal computer and comparing their results with a real experiment. References 15, figures 12.
{"title":"CALIBRATION OF EXPERIMENTAL INSTALLATION FOR MEASURING PARTIAL DISCHARGES IN LOW CAPACITANCE INSULATION SAMPLES","authors":"Y. Trotsenko, O. Protsenko, Artem Nesterko, V. Chyzhevskyi, V. Mykhailenko","doi":"10.30929/1995-0519.2021.5.97-102","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.97-102","url":null,"abstract":"Purpose. The method for calibrating an experimental installation for studying the patterns of partial discharges aris-ing in samples of paper insulation having low capacitance was developed. Methodology. In order to verify the proposed method, a physical experiment was carried out in a high-voltage laboratory to measure partial discharge parameters using a digital oscilloscope. Free software for circuit simulation was used to create high-pass filter schematics. Results. The task of calibrating the systems for measuring partial discharges of low capacitance insulation samples (for example, ranging from 1 pF to 5 pF) is characterized by high complexity, because the calibration capacitor must have a capacitance an order of magnitude smaller than the capacitance of the test sample (from 0.1 pF to 0.5 pF, accordingly), which sometimes cannot be achieved practically. Moreover, in such case the stray capacitance will obviously be of the same order as the capacitance of calibration capacitor, or even greater. In such cases traditional calibration circuits where calibration generator is connected in parallel with the test object cannot be applied. Originality. Alternate calibration circuit was proposed, implemented and tested in the work, where the calibration generator is connected in series with test object. Practical value. Studies of the proposed calibration method have shown that it can be used quite effectively in cases when test object have low capacitance. The results of recording the calibration pulses showed that they can be reliably recorded and measured with a minimum error (oscilloscope error), and errors associated with parasitic parameters of the recording circuit are automatically taken into account when calibrating by this method and do not require additional adjustments. Conclusions. There is a possibility to increase the sensitivity of the measuring circuit to 0.05 pC/V, primarily by increasing the gain of the oscilloscope at least 100 times without repeating the calibration procedure. This will make it possible to study insulation samples of fairly high quality in which the level of partial discharges is much lower than in those samples used in this work. The experimental installation can be used to analyze different ways of modeling partial discharges on a personal computer and comparing their results with a real experiment. References 15, figures 12.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128136662","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.4.80-88
I. Kuziev, Volodymyr Zahorianskyi, Volodymyr Drahobetskyi, T. Haikova, S. Shlyk
Purpose. Development of a mathematical model of the process of elastoplastic deformation of the cladding layer of a layered workpiece during welding (cladding) by explosion with the formation of the objective function of optimal deformation and establishing a relationship between the parameters of welding (cladding) by explosion and the shear bond strength of the layers and the wear resistance of the cladding layer. Methodology. The solution to the problem of elastoplastic deformation is carried out using the equations of the flow theory and the nodal calculation scheme. The required deformation values are determined at the nodal mass points of the computational grid. At each moment of time, the positions of the nodes of the cladding workpiece, thrown under loading by a traveling pressure wave, are de-termined. Deformations and their intensity are determined by the position of the nodes. The task of determining the re-quired parameters of explosion welding (cladding) is reduced to the task of mathematical programming. The objective function is minimized on a family of curves, the arguments of which are the explosion welding (cladding) parameter and the welding gap. The interaction of the cladding workpiece with the pressure wave generated during the detonation of the explosive is determined by the dependences of the pressure of the detonation products, the mass velocity of the cladding workpiece and the shock wave velocity at the moment the shock wave reaches the free surface on the parame-ters of the explosion cladding (welding) with subsequent calculation of the stress-strain state of the workpieces. Accord-ing to the optimal parameters of explosion welding (cladding), a probabilistic assessment of the shear bond strength of the layers is carried out. If the strength is insufficient, the parameters are adjusted. Findings. As a result of numerical modeling, the calculation of the deformed state of the projectile is carried out. The parameters of explosion welding (cladding) are determined, at which the intensity of deformations of the cladding layer corresponds to the limit uniform ones. Based on the obtained parameters of explosion welding (cladding), the calculation of the shear strength of the layer joint was performed. Originality. For the first time, a model has been developed for the optimal deformation of the cladding layer during explosion welding (cladding) of wear-resistant compositions. The target function and the optimal process parameters have been established. A method is proposed for calculating the weighting coefficients of the objective function for multi-criteria multilevel optimization. Practical value. Recommendations for industrial application were developed and modes of explosion welding (cladding) were tested to obtain wear-resistant compositions of aluminum alloy with carbon steel.
{"title":"CALCULATION OF THE STRESS-STRAIN STATE OF THE CLADDING LAYER DURING CLADDING (WELDING) BY EXPLOSION","authors":"I. Kuziev, Volodymyr Zahorianskyi, Volodymyr Drahobetskyi, T. Haikova, S. Shlyk","doi":"10.30929/1995-0519.2021.4.80-88","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.4.80-88","url":null,"abstract":"Purpose. Development of a mathematical model of the process of elastoplastic deformation of the cladding layer of a layered workpiece during welding (cladding) by explosion with the formation of the objective function of optimal deformation and establishing a relationship between the parameters of welding (cladding) by explosion and the shear bond strength of the layers and the wear resistance of the cladding layer. Methodology. The solution to the problem of elastoplastic deformation is carried out using the equations of the flow theory and the nodal calculation scheme. The required deformation values are determined at the nodal mass points of the computational grid. At each moment of time, the positions of the nodes of the cladding workpiece, thrown under loading by a traveling pressure wave, are de-termined. Deformations and their intensity are determined by the position of the nodes. The task of determining the re-quired parameters of explosion welding (cladding) is reduced to the task of mathematical programming. The objective function is minimized on a family of curves, the arguments of which are the explosion welding (cladding) parameter and the welding gap. The interaction of the cladding workpiece with the pressure wave generated during the detonation of the explosive is determined by the dependences of the pressure of the detonation products, the mass velocity of the cladding workpiece and the shock wave velocity at the moment the shock wave reaches the free surface on the parame-ters of the explosion cladding (welding) with subsequent calculation of the stress-strain state of the workpieces. Accord-ing to the optimal parameters of explosion welding (cladding), a probabilistic assessment of the shear bond strength of the layers is carried out. If the strength is insufficient, the parameters are adjusted. Findings. As a result of numerical modeling, the calculation of the deformed state of the projectile is carried out. The parameters of explosion welding (cladding) are determined, at which the intensity of deformations of the cladding layer corresponds to the limit uniform ones. Based on the obtained parameters of explosion welding (cladding), the calculation of the shear strength of the layer joint was performed. Originality. For the first time, a model has been developed for the optimal deformation of the cladding layer during explosion welding (cladding) of wear-resistant compositions. The target function and the optimal process parameters have been established. A method is proposed for calculating the weighting coefficients of the objective function for multi-criteria multilevel optimization. Practical value. Recommendations for industrial application were developed and modes of explosion welding (cladding) were tested to obtain wear-resistant compositions of aluminum alloy with carbon steel.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131194079","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.24-29
O. Maslak, N. Grishko, Y. Yakovenko, V. Talover
Purpose. To analyze the process of formation of the category «labor productivity», the modern interpretation of this category, its place in the system of overall productivity and the degree of compliance with the current needs of the economy. Methodology. Labor productivity can be considered a qualitative characteristic of economic growth and an indicator of development based on the increase in production in demand in the market and the resulting profit. It depends on the amount of physical and human capital, different types of resources and technologies available to producers. Therefore, representatives of management at all levels, including the system of public administration, should take into account the fact that the level and quality of life of the population in the country depends on the ability of the economy to ensure the production of goods and services. Results. It is determined that the indicator of increasing labor productivity is the growth of value-added due to more rational use, and more coordinated functioning of all factors of production. Productivity characterizes how effectively resources are used in a country for the production of goods and services and is one of the elements of measuring economic growth, competitiveness and living standards. Originality. It is proposed to consider labor productivity as a socio-economic category that reflects the result of the interaction of productive forces and production relations in the form of the degree of appropriate and fruitful human activity, characterized by the ability of the employee to produce a unit of working time. Practical value. The main results show that it is necessary to create conditions for economic growth, variously encouraging high rates of accumulation of factors of production and ensuring their effective use.
{"title":"CONCEPTUAL APPROACHES TO THE DEFINITION OF THE CATEGORY «LABOR PRODUCTIVITY»","authors":"O. Maslak, N. Grishko, Y. Yakovenko, V. Talover","doi":"10.30929/1995-0519.2021.5.24-29","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.24-29","url":null,"abstract":"Purpose. To analyze the process of formation of the category «labor productivity», the modern interpretation of this category, its place in the system of overall productivity and the degree of compliance with the current needs of the economy. Methodology. Labor productivity can be considered a qualitative characteristic of economic growth and an indicator of development based on the increase in production in demand in the market and the resulting profit. It depends on the amount of physical and human capital, different types of resources and technologies available to producers. Therefore, representatives of management at all levels, including the system of public administration, should take into account the fact that the level and quality of life of the population in the country depends on the ability of the economy to ensure the production of goods and services. Results. It is determined that the indicator of increasing labor productivity is the growth of value-added due to more rational use, and more coordinated functioning of all factors of production. Productivity characterizes how effectively resources are used in a country for the production of goods and services and is one of the elements of measuring economic growth, competitiveness and living standards. Originality. It is proposed to consider labor productivity as a socio-economic category that reflects the result of the interaction of productive forces and production relations in the form of the degree of appropriate and fruitful human activity, characterized by the ability of the employee to produce a unit of working time. Practical value. The main results show that it is necessary to create conditions for economic growth, variously encouraging high rates of accumulation of factors of production and ensuring their effective use.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"49 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130057765","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.62-67
I. Shevchenko, Pavlo Andreiev, N. Khairova, Maiia Dernova
Purpose. We consider the language system as a set of subsystems, structured in the form of a semiotic hierarchy, in which the content of higher-level units is not completely reduced to the substantive components of lower-level units. Therefore, the meaning of higher-level units cannot always be «calculated» taking into account information about the meaning of lower-level units and information about the relationships between these units. At the same time, the structural model of the language system uses thematic or semantic features of connectivity between units of one level of the hierarchy. This opens up certain possibilities for quantitative content analysis. Methodology. Considering the results of known works, we noticed that none of them uses the analysis of paragraphs as independent structural units of the text. The paragraph usually reveals one micro-theme of the text, which is in the development of the theme of the whole text. It is hypothesized that there should be certain patterns in the gradual dynamics of the frequencies of certain words from one paragraph to another, if the studied text has the property of coherence, when a certain topic plays the role of leitmotif. The aim of this work is to study the possibility of using the coherence of the frequency characteristics of paragraphs to identify keywords and satellite words surrounding the keywords – context sets. Results. To achieve this goal the following tasks are solved: development of a text model that takes into account the task of paragraph-by-paragraph analysis of the dynamics of relative frequencies; development of a method of paragraph-by-paragraph text analysis; testing of the developed method on a collection of documents. Originality. A text representation model has been developed that differs from the existing ones in that it includes a set of the most common words, a set of keywords, a set of satellite words, the intersection of sets of paragraphs, keywords, and satellite words. This provides a formal basis for building a method of analyzing the dynamics of relative frequencies of words that are most common in the text and identifying keywords and context sets. A method of text analysis has been developed, which differs from the existing ones in that it is based on the detection of positive correlations between the relative frequencies of occurrence of a subset of the most frequent words in paragraphs. This allows you to identify keywords and context subsets in texts that have some coherence and in individual paragraphs of text that have weak coherence. Practical value. A set of Ukrainian-language, Russian-language and English-language scientific and technical texts was formed to test the efficiency of the text analysis method. The set includes scientific and technical articles on various topics and fragments of textbooks. The results of machine analysis for keyword detection were compared with the author's sets of keywords in scientific and technical articles. Experts we
{"title":"USE OF THE STATISTICAL MODEL OF COHERENCE OF CONNECTED TEXT AS AN ADDITIONAL TOOL OF QUANTITATIVE CONTENT ANALYSIS","authors":"I. Shevchenko, Pavlo Andreiev, N. Khairova, Maiia Dernova","doi":"10.30929/1995-0519.2021.5.62-67","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.62-67","url":null,"abstract":"Purpose. We consider the language system as a set of subsystems, structured in the form of a semiotic hierarchy, in which the content of higher-level units is not completely reduced to the substantive components of lower-level units. Therefore, the meaning of higher-level units cannot always be «calculated» taking into account information about the meaning of lower-level units and information about the relationships between these units. At the same time, the structural model of the language system uses thematic or semantic features of connectivity between units of one level of the hierarchy. This opens up certain possibilities for quantitative content analysis. Methodology. Considering the results of known works, we noticed that none of them uses the analysis of paragraphs as independent structural units of the text. The paragraph usually reveals one micro-theme of the text, which is in the development of the theme of the whole text. It is hypothesized that there should be certain patterns in the gradual dynamics of the frequencies of certain words from one paragraph to another, if the studied text has the property of coherence, when a certain topic plays the role of leitmotif. The aim of this work is to study the possibility of using the coherence of the frequency characteristics of paragraphs to identify keywords and satellite words surrounding the keywords – context sets. Results. To achieve this goal the following tasks are solved: development of a text model that takes into account the task of paragraph-by-paragraph analysis of the dynamics of relative frequencies; development of a method of paragraph-by-paragraph text analysis; testing of the developed method on a collection of documents. Originality. A text representation model has been developed that differs from the existing ones in that it includes a set of the most common words, a set of keywords, a set of satellite words, the intersection of sets of paragraphs, keywords, and satellite words. This provides a formal basis for building a method of analyzing the dynamics of relative frequencies of words that are most common in the text and identifying keywords and context sets. A method of text analysis has been developed, which differs from the existing ones in that it is based on the detection of positive correlations between the relative frequencies of occurrence of a subset of the most frequent words in paragraphs. This allows you to identify keywords and context subsets in texts that have some coherence and in individual paragraphs of text that have weak coherence. Practical value. A set of Ukrainian-language, Russian-language and English-language scientific and technical texts was formed to test the efficiency of the text analysis method. The set includes scientific and technical articles on various topics and fragments of textbooks. The results of machine analysis for keyword detection were compared with the author's sets of keywords in scientific and technical articles. Experts we","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115105346","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.103-108
V. Nozhenko, O. Bialobrzheskyi, A. Gladyr
Purpose. The purpose of the paper is to determine the economic viability of filter compensating devices installation at transformers substations' busbars 0.4 kV in conditions of underloading and sustainable growth of energy carriers. Methodology. Measurement of current and voltage at the transformer substation 0.4 kV and monitoring of electric energy parameters were carried out. Based on the discrete current spectrum on the secondary voltage side, the growth of power losses of the cable line and transformer windings is calculated. The economic damage for ten years caused by the decrease in the quality of electricity, taking into account the increase in the cost of electricity, is calculated. Using methods that are based on discounted estimates, the economic feasibility of filter compensating devices installation was determined. Results. The total economic damage for ten years, taking into account the increase in the cost of electricity for the studied mode amounted to 2477354.50 UAH, and for the estimated one – 4720967.70 UAH. The analysis of the economic viability of filter compensating devices installation at transformers substations' busbars showed that this measure is appropriate for the estimated mode, but not for the studied one. Originality. The approach of determining the economic viability of filter compensating devices installation at transformers substations' busbars takes into account the amount of active power losses due to higher harmonics in each element of the electrical network, line overloading and increasing cost of electricity. Practical value. The obtained results can be used to determine the economic viability of filter compensating devices installation depending on the load of the line. References 12. Figures 5. Tables 5.
{"title":"ECONOMIC VIABILITY OF FILTER COMPENSATING DEVICES INSTALLATION AT TRANSFORMERS SUBSTATIONS’ BUSBARS","authors":"V. Nozhenko, O. Bialobrzheskyi, A. Gladyr","doi":"10.30929/1995-0519.2021.5.103-108","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.103-108","url":null,"abstract":"Purpose. The purpose of the paper is to determine the economic viability of filter compensating devices installation at transformers substations' busbars 0.4 kV in conditions of underloading and sustainable growth of energy carriers. Methodology. Measurement of current and voltage at the transformer substation 0.4 kV and monitoring of electric energy parameters were carried out. Based on the discrete current spectrum on the secondary voltage side, the growth of power losses of the cable line and transformer windings is calculated. The economic damage for ten years caused by the decrease in the quality of electricity, taking into account the increase in the cost of electricity, is calculated. Using methods that are based on discounted estimates, the economic feasibility of filter compensating devices installation was determined. Results. The total economic damage for ten years, taking into account the increase in the cost of electricity for the studied mode amounted to 2477354.50 UAH, and for the estimated one – 4720967.70 UAH. The analysis of the economic viability of filter compensating devices installation at transformers substations' busbars showed that this measure is appropriate for the estimated mode, but not for the studied one. Originality. The approach of determining the economic viability of filter compensating devices installation at transformers substations' busbars takes into account the amount of active power losses due to higher harmonics in each element of the electrical network, line overloading and increasing cost of electricity. Practical value. The obtained results can be used to determine the economic viability of filter compensating devices installation depending on the load of the line. References 12. Figures 5. Tables 5.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126015222","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}
Pub Date : 2021-10-27DOI: 10.30929/1995-0519.2021.5.49-54
L. Cherniak, Olexandr Mikhyeyev, S. Madzhd, Tetyana Dmytrukha, O. Lapan
Purpose. Establishing the influence of hyperthermal treatment of lettuce seeds and chemical contamination in the soil on the growth rates of seedlings. Methodology. The paper determines the level of influence of two factors on the growth characteristics of lettuce used for biotesting of soil contaminated with petroleum products. In accordance with the purpose of the study, lettuce seeds were pre-heat treated at a temperature of 60 C. Processing time - 5 minutes Pre-viously, a study was conducted to select the inhibitory and hormesis action of heat treatment (heat treatment time). After heat treatment, the envelopes with the seeds were dried. Next, lettuce seeds were sown in the plant. Originality. If we consider that heat treatment simulates the action of certain factors, or the complex action of certain factors, it means that we must take this into account and use certain sensitized objects in the practice of biotesting. Practical meaning. The effect of chemical soil contamination (aviation kerosene) on the sensitized plant object has been determined. Namely, lettuce used in the practice of biotesting of soil contaminated with petroleum products. The dependence of lettuce growth characteristics on the level of excess aviation fuel content in the soil is determined. Conclusions. As a result of the analysis of the received experimental data it is established that for the minimum of the used concentrations of pollu-tant (1 OAC for aviation kerosene) the sensitizing effect of additional influence of another factor - by nature - hyper-thermia is possible. This fact requires the improvement of the practice of determining the OAC, because in real condi-tions, the objects are exposed to a set of factors, the negative effects of which may be mutually reinforcing.
{"title":"STUDY OF THE INFLUENCE OF HYPERTHERMAL TREATMENT OF SALAD SEEDS AND CHEMICAL CONTAMINATION OF SOILS ON GROWTH INDICATORS OF SPROUGHTS","authors":"L. Cherniak, Olexandr Mikhyeyev, S. Madzhd, Tetyana Dmytrukha, O. Lapan","doi":"10.30929/1995-0519.2021.5.49-54","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.5.49-54","url":null,"abstract":"Purpose. Establishing the influence of hyperthermal treatment of lettuce seeds and chemical contamination in the soil on the growth rates of seedlings. Methodology. The paper determines the level of influence of two factors on the growth characteristics of lettuce used for biotesting of soil contaminated with petroleum products. In accordance with the purpose of the study, lettuce seeds were pre-heat treated at a temperature of 60 C. Processing time - 5 minutes Pre-viously, a study was conducted to select the inhibitory and hormesis action of heat treatment (heat treatment time). After heat treatment, the envelopes with the seeds were dried. Next, lettuce seeds were sown in the plant. Originality. If we consider that heat treatment simulates the action of certain factors, or the complex action of certain factors, it means that we must take this into account and use certain sensitized objects in the practice of biotesting. Practical meaning. The effect of chemical soil contamination (aviation kerosene) on the sensitized plant object has been determined. Namely, lettuce used in the practice of biotesting of soil contaminated with petroleum products. The dependence of lettuce growth characteristics on the level of excess aviation fuel content in the soil is determined. Conclusions. As a result of the analysis of the received experimental data it is established that for the minimum of the used concentrations of pollu-tant (1 OAC for aviation kerosene) the sensitizing effect of additional influence of another factor - by nature - hyper-thermia is possible. This fact requires the improvement of the practice of determining the OAC, because in real condi-tions, the objects are exposed to a set of factors, the negative effects of which may be mutually reinforcing.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123321851","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}
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