Scientific journal of the Ternopil national technical university最新文献

{"title":"Dependence of the rate of corrosion and hydrogen diffusion of 09Mn2Si steel on the concentration of hydrogen sulphide in chloride-acetate environments","authors":"B. Datsko, M. Chuchman, V. Ivashkiv, S. Halaichak","doi":"10.33108/visnyk_tntu2023.01.130","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.01.130","url":null,"abstract":"It is found that with increasing concentration of hydrogen sulphide (H2S) to 100, 1000 and 2800 mg/dm3 (H2Ssat) the corrosion rate (C) of steel 09Mn2Si increases by ~1,48; 1,58 and ~1,64 times in 24 hours of exposure, however, in 720 h, it increases by ~1,8 and ~3,3 times at its concentration of 1000 mg/dm3 and saturation, while at 100 mg/dm3 C decreases by 1,8 times, which is due to the formation of continuous sulphide films. It is shown that the volume amount of hydrogen in 09Mn2Si steel increases with the increase of H2S content of the solution from 100; 500; 1500 and 2800 mg/dm3 in 1,2; 1,5; 1,9 and 2,5 times. Hydrogen diffusion increases from 0.9·10-6 to 2.7·10-6 cm2/s with the increase of membrane thickness from 0,75 to 1,50 mm and does not depend on the H2S content.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84920480","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}

{"title":"Investigation of the change in technological properties of refractory metals after diffusion saturation","authors":"V. Kovbashyn, I. Bochar","doi":"10.33108/visnyk_tntu2023.01.121","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.01.121","url":null,"abstract":"The recommended ways of improving the technological and physico-mechanical properties of refractory metals (molybdenum and tungsten) after diffusion saturation with the elements of the same name are described. In order to increase significantly the performance characteristics and transition to stricter operating conditions for products made of refractory metals, it is necessary to improve the existing methods of processing metals and make significant changes in the development of new ones. Different directions of refractory metals processing, which involve diffusion saturation with elements of the same name, introduction of activating additives into the composition of the diffusion mixture, use of isothermal conditions during chemical-thermal treatment, and application of protective coating to improve technological and physical-mechanical properties, have been studied and analyzed. To evaluate changes in the mechanical properties of molybdenum and tungsten after diffusion saturation with the elements of the same name, appropriate tests were conducted. To study the changes in the technological and physical and mechanical properties of refractory metals after the process of diffusion saturation in active-aggressive environment, tests on static rupture and stretching, bending, impact bending and buckling were carried out. It has been established that it is possible to increase the technological characteristics and ensure the use of refractory metals in harsher operating conditions by introducing molybdenum and tungsten powders of the same name and activating additive (sodium fluoride) into the charge to obtain protective coating. Comparison of the magnitude of the temporary resistances values for of untreated samples breaks of refractory metals and samples that have undergone the appropriate heat treatment showed significant decrease in these indicators after diffusion saturation with the same elements (molybdenation and tungstenization). Based on the analysis of literature data and conducted research, a set of measures aimed at the improvement of technological and physico-mechanical properties of refractory metals (molybdenum and tungsten) after diffusion saturation with the same elements in powder medium is proposed.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"135 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73625044","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}

{"title":"Information technology platform for monitoring infectious diseases","authors":"A. Stanko","doi":"10.33108/visnyk_tntu2023.02.098","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.02.098","url":null,"abstract":"Research conducted to curb the spread of infectious diseases in cities confirms that technology is making a significant contribution. A significant number of scientific studies analyze the impact of technology on the covid-19 pandemic in various aspects. However, the problems associated with the implementation of monitoring systems based on the Internet of Things are not studied in depth, they are related to the design of systems, their implementation in everyday life. This research provides an up-to-date analysis of how technology is helping to fight infectious diseases. Along with this, we consider the main challenges faced by users of such technologies, namely: privacy, security, scalability, etc. As a result, we can say that related technologies have a significant impact on the detection, tracking and containment of viruses. The organization and movement of a person has a great influence on the frequency of contacts, which, as a result, affects the transmission, spread and persistence of disease-causing pathogens. The search for contact structures of infectious diseases in view of human mobility requires a clear consideration of the spatial and temporal dimensions of pathogen transmission, which depend on the type of pathogen and the method of its transmission, the number of contacts and location. A platform that can help collect and analyze data mainly depends on having access to accurate details about various factors. Therefore, obtaining information is of prime importance for the development of this kind of technological platform. Using advanced technologies and tools such as IoT, remote monitoring devices, GPS, artificial intelligence and data analytics, contact tracing programs can provide an extra layer of protection when it comes to monitoring and controlling people's lives and health. The proposed approach to ensure the effective implementation of the IT platform for monitoring infectious diseases, as well as the formed group of roles. This approach makes it easier to launch the platform, distributing work between assigned roles and reducing the burden on health care resources and other city services.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86483551","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}

{"title":"UAV movement planning in mountainous terrain","authors":"L. Romaniuk, I. Chykhira, V. Kartashov, Ihor Dombrovskyi","doi":"10.33108/visnyk_tntu2023.02.015","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.02.015","url":null,"abstract":"The principles of planning of unmanned aerial vehicle movement in mountainous terrain are described in this paper. It is emphasized that the movement of the aerial vehicle takes place along the trajectory on a certain trajectory movement model, where unmanned aerial vehicle is represented as material point, the mass of which is concentrated in the center of mass. A discrete model in the linear state space that approximates the dynamics of an unmanned aerial vehicle is proposed. The general spatial movement of unmanned aerial vehicle is divided into longitudinal and lateral movement, and the longitudinal movement is considered independently of the lateral movement, taking into account the characteristics of the flight of unmanned aerial vehicle in mountainous terrain. The selection of the polygon from a certain set of irregularities in relation to the speed limit, acceleration limit and change in acceleration of unmanned aerial vehicle in the conditions of movement in mountainous terrain is graphically presented. It is emphasized that since the corresponding heights for any point on the curved surface of the relief are unknown, in order to obtain them, it is necessary to use the interpolation of the vertices of the corresponding triangle. It is noted that while choosing certain values of the coefficients, it is possible to describe the surface of the terrain using triangles, taking into account the combinations of coordinates of each known peak, and using the combinations of undefined coefficients as variable solutions, it is possible to describe the restrictions on the bending of the mountainous terrain. It is emphasized that during trajectory movement, the unmanned aerial vehicle is presented as material point, and in a real flight over mountainous terrain, its characteristic dimensions must be taken into account in order to avoid the obstacle successfully. It is proposed to increase the dimensions by a certain amount in each direction for effective obstacle avoidance of the unmanned aerial vehicle in mountainous terrain.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80542133","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}

{"title":"Analysis of two-section phase-controlled resonant voltage converter","authors":"Anatolii Lupenko, L. Movchan, Ivan Sysak, Serhii Babiuk","doi":"10.33108/visnyk_tntu2023.02.087","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.02.087","url":null,"abstract":"Analysis of two-section resonant DC-to-DC converter with phase power control is carried out in this paper. Two-section converter is considered as a boundary case of the multi-section converter with only one controlled section and other uncontrolled sections. The converter sections are parallel resonant half-bridge voltage inverters with a common resonant capacitor connected to the load through a matching transformer, center-tapped rectifier and smoothing filter. One of the sections is the reference, relative to which the phase shift of the output pulses of the other section is adjusted. The switching frequency of the converter is constant, which improves its electromagnetic compatibility. Analysis is carried out by the fundamental harmonic approximation method. Analytical expressions for voltage and current phasors in both sections of the converters have been established. The dependence of the converter power on the phase shift between the pulses of the half-bridge inverter sections was obtained. The dependence of the efficiency of the converter on the power was analyzed. It is shown that the efficiency slightly decreases when the power is reduced in a wide range of powers and only at powers less than 10% of full load power it drops sharply. The problems of operation of section transistor switches in their zero-voltage switching mode is considered. Verification of the conducted analysis was carried out by simulation of the converter circuit using the PSIM program for modeling power electronics devices. The simulation results are in a good agreement with the analysis results.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"307 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79553292","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}

{"title":"Characteristics of the deformation diagram of AMg6 alloy","authors":"S. Fedak, Oleg Yasnii, I. Didych, Nadiya Kryva","doi":"10.33108/visnyk_tntu2023.02.033","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.02.033","url":null,"abstract":"The parameters of the deformation of AMg6 alloy diagram under conditions of uniaxial tension were studied, taking into account the areas of material strengthening. The dependence of the change in magnitude of deformation occurring after jump-like increments in deformation caused by the destruction of dispersed phases in this alloy was revealed. A method of taking into account the revealed regularities in predicting the general deformation of AMg6 alloy based on the histogram of distribution of dispersed particles in the material is proposed.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90807493","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}

{"title":"The results of the study of the cutter of the remains of root crops haulm","authors":"V. Boyko, V. Baranovsky, V. Pankiv, V. Onyshchenko, S. Marinenko","doi":"10.33108/visnyk_tntu2023.01.099","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.01.099","url":null,"abstract":"Fodder beet pulp is harvested separately using the principle of cutting it at the root. The agrophysical characteristics of root crops (location of their heads relative to the soil surface) greatly affect the process of separating the remains of the pulp from the heads. At the same time, it is advisable to carry out the technological process of collecting scallions in a combined (two-stage) way. It combines the cutting of the main mass of the gorse and the subsequent removal of the remains of the gorse from the heads of root crops with cutters of the «passive copier-passive knife» type. The aim of the research is to increase the functional indicators of the gorse-harvesting modules by developing improved working bodies for cutting the gorse. The article provides a description of the technological process of the improved cutter for the remnants of hemlock and the results of comparative experimental studies of three designs of cutters.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85518733","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}

{"title":"Coordinate measurement in multi-beam drone positioning system","authors":"D. Averin, V. Borovytsky","doi":"10.33108/visnyk_tntu2023.01.080","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.01.080","url":null,"abstract":"The multi beam drone positioning system for automatic measurements of drone coordinates is presented. One part of this system is installed round a landing pad or a goods delivery pad. It forms a set of low-energy optical beams of definite shapes in three-dimensional space. Each beam transmits a digital code that characterizes its location relatively this pad. Second part of this system is a small set of miniature photodetector units that are fixed under a drone. The paper describes the technique based of the beam code analysis for calculation of drone coordinates relatively a landing pad. This system guarantees the accuracy that is necessary for accurate drone taking off, landing or goods delivery without usage of an expensive digital camera or a human operator. The advantages and possible applications of these sensors are also discussed.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81152179","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}

{"title":"Technologies for designing and programming big data in e-learning","authors":"R. Khrabatyn, Viktoriia Bandura, N. Shkolna, Yuri Khrabatyn","doi":"10.33108/visnyk_tntu2023.01.072","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.01.072","url":null,"abstract":"Recently, e-education around the world is developing rapidly and the main problem is the timely provision of students with quality educational information. A significant impetus for this is the global epidemic of covid-19. The problem of implementing e-education cannot be solved without analysing the large flow of information coming into the information environment of e-education from participants in the educational process – students, teachers, administration, etc. In this environment, there are a large number of different types of data, both structured and unstructured, which are difficult to process by traditional statistical methods. The aim of the study is to show that the development and implementation of successful e-learning systems requires the use of new technologies that would allow the storage and processing of large data streams. Large amounts of disk space are required to store large data. It is shown that to solve this problem it is expedient to use cluster technology NAS (Network Area Storage), which allows to store information of educational institutions on NAS - servers and to have access to them from the Internet. To process and personalize Big Data in the e-learning environment, it is proposed to use technologies MapReduce, Hadoop, NoSQL and others. The article provides examples of the use of these technologies in the cloud environment. These technologies in e-learning make it possible to achieve flexibility, scalability, accessibility, security, confidentiality and ease of use of educational information. Another important problem of e-learning is the discovery of new, sometimes hidden, relationships in big data, new knowledge (data mining), which can be used to improve the educational process and increase the efficiency of its management. To classify electronic educational resources, identify patterns (patterns) of students with similar psychological, behavioural and intellectual characteristics, the development of individualized curricula in the article it is proposed to use methods of big data analysis. The article shows that to date, many software applications have been developed for big data mining. These software products can be used for classification, clustering, regression and network analysis of educational information. The application of these methods in e-education will allow teachers to receive timely information about students, to respond quickly to any changes in the learning process, to make timely changes to educational content. The obtained results of the research are offered to be used for development of recommendations at creation of electronic courses in higher and secondary educational institutions of Ukraine.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83590829","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}

{"title":"The use of abstract moore automaton to control the sensors of a service-oriented alarm and emergency notification network","authors":"O. Kryazhych, Victoria Itskovych, Kateryna Iushchenko, Veronika Hrytsyshyna, Danylo Bruvier, Vyacheslav Nykytyuk, I. Bodnarchuk","doi":"10.33108/visnyk_tntu2023.01.111","DOIUrl":"https://doi.org/10.33108/visnyk_tntu2023.01.111","url":null,"abstract":"The paper aims to achieve the ability of an abstract Moore automaton to control the sensors of a service-oriented alarm system for notification of emergency situations in a metropolis. An important procedure is minimization of the internal settings of the automaton, on the basis of which there will be a graph of transitions to the machine for which a synchronous trigger is turned on – a switch between sensors, - which allows not only to receive information, but also to confirm that it is necessary to notify about the current emergency situation. The relevance of those proves the need for security of living in the urban environment. Constant monitoring of the parameters of the medium is of high necessity. This allows to balance the key factors influencing the system in order to make a sound management decision. The possible ways of using an abstract Moore automaton to control the sensors of a service-oriented alarm system about emergency situations in a metropolis is analysed.","PeriodicalId":21595,"journal":{"name":"Scientific journal of the Ternopil national technical university","volume":"305 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78254729","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}