Pub Date : 2022-07-04DOI: 10.15276/hait.05.2022.11
Olena Nazarova, V. Osadchyy, Serhii S. Shulzhenko
Today, elevator production in Ukraine needs innovative solutions and changes, because most of the equipment in operation was built and installed in the 70-80s of the last century. Due to the high cost of new frequency-controlled winches and the complexity of maintenance, the search for modernization and improvement of existing elevator winches remains an alternative. No less important stage of operation is diagnostics. Timely detection of damages and forecasting of future failures allow to provide high-quality work during all term of operation, and also to reduce expenses of budgetary funds for difficult repairs. Computer simulation plays an important role in the modern world both during the design of a new elevator and during operation. Thanks to fairly simple and clear programs, it is possible to reproduce not only the standard modes of operation of the mechanisms, but also to perform calculations of future possible faults. The use of visualization facilitates the perception of information for operators, engineers and other users involved. The paper presents a computer model of a two-speed elevator with an induction motor and a reduction winch. The research used Matlab / Simulink software, which is intuitive to use and, in the full sense of the word, informative. The built model of the elevator has feedback on the calculated load of the cabin. The latter is determined by the transients during engine start-up and affects the positioning accuracy at a stop. The dependences of the influence of the degree of cab loading on the positioning accuracy are found. In the second stage, the supply voltage parameter is added. A change in this parameter within ± 10% affected the previous calculations of the loading degree and deteriorated the accuracy by almost three times. At the same time, most indicators (75%) meet the requirements of international standards EN 81-20: 2014 with positioning accuracy in the range of ± 10 mm. In further studies it is planned to use the obtained results to reduce the sensitivity of the algorithm for calculating the loading degree of the cabin to change the supply voltage and ensure the required positioning accuracy in the entire load range of the cabin when changing the supply voltage ± 10 %.
{"title":"Computer modeling of electromechanical system of two-speed elevator","authors":"Olena Nazarova, V. Osadchyy, Serhii S. Shulzhenko","doi":"10.15276/hait.05.2022.11","DOIUrl":"https://doi.org/10.15276/hait.05.2022.11","url":null,"abstract":"Today, elevator production in Ukraine needs innovative solutions and changes, because most of the equipment in operation was built and installed in the 70-80s of the last century. Due to the high cost of new frequency-controlled winches and the complexity of maintenance, the search for modernization and improvement of existing elevator winches remains an alternative. No less important stage of operation is diagnostics. Timely detection of damages and forecasting of future failures allow to provide high-quality work during all term of operation, and also to reduce expenses of budgetary funds for difficult repairs. Computer simulation plays an important role in the modern world both during the design of a new elevator and during operation. Thanks to fairly simple and clear programs, it is possible to reproduce not only the standard modes of operation of the mechanisms, but also to perform calculations of future possible faults. The use of visualization facilitates the perception of information for operators, engineers and other users involved. The paper presents a computer model of a two-speed elevator with an induction motor and a reduction winch. The research used Matlab / Simulink software, which is intuitive to use and, in the full sense of the word, informative. The built model of the elevator has feedback on the calculated load of the cabin. The latter is determined by the transients during engine start-up and affects the positioning accuracy at a stop. The dependences of the influence of the degree of cab loading on the positioning accuracy are found. In the second stage, the supply voltage parameter is added. A change in this parameter within ± 10% affected the previous calculations of the loading degree and deteriorated the accuracy by almost three times. At the same time, most indicators (75%) meet the requirements of international standards EN 81-20: 2014 with positioning accuracy in the range of ± 10 mm. In further studies it is planned to use the obtained results to reduce the sensitivity of the algorithm for calculating the loading degree of the cabin to change the supply voltage and ensure the required positioning accuracy in the entire load range of the cabin when changing the supply voltage ± 10 %.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131585234","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}
The article is devoted to the development of models and methods for fault analysis for examinate test patterns. Deductive fault simulation of digital devices is the most advanced technology that serves the field of design and testing of modern computer systems. At the same time, fault simulation solves the problem of assessing the quality of the test in the class of single constant defects. However, the computational complexity of obtaining deductive formulas, estimated as n3 , is a rather difficult task for high-dimensional RTL-level functional circuits, so the deductive method is usually used only for digital circuits represented at the gate level. Next, we propose a vector method for synthesis deductive formulas for digital schemes represented by RTL elements. This method became possible due to the element description of any complexity in the form of output states vector for combinational device. The model of xor-relationships between the wonderful logical functions (or, xor, and) of digital objects is improved, which is convoluted into zero-space. It makes possible to solve the problems of design and test, machine learning, search for similarities-differences, and destructive components in processes and phenomena. The advantages of the vector model for a compact description of objects, functions and structures are determined. It is proposed to replace analytical expressions that require algorithmically complex calculating, with vector data structures for describing functional logic. Vector-deductive method for synthesis formulas for transporting input fault lists is proposed. It has a quadratic computational complexity of register operations. The coordinate-vector model of defects is considered, not tied to input variables, which can be used for efficient processing of complex logic circuits when assessing the quality of synthesized tests. An algorithm for the synthesis of deductive vectors is presented, which differs from the known ones in the technological parallel processing simplicity of truth tables and makes it possible to create structural and logical conditions for simulating faults in digital projects of the gate, register and system description levels. An efficient method for the synthesis of a deductive truth table according to the rule L=T⊕F is proposed. It differs from the known ones by using vector-coordinate parallel xor-operation. It provides the transportation of faults through a functional element of arbitrary complexity.
{"title":"Developing method of vector synthesis deductive logic for computer systems fault analysis","authors":"A. Hahanova","doi":"10.15276/hait.05.2022.8","DOIUrl":"https://doi.org/10.15276/hait.05.2022.8","url":null,"abstract":"The article is devoted to the development of models and methods for fault analysis for examinate test patterns. Deductive fault simulation of digital devices is the most advanced technology that serves the field of design and testing of modern computer systems. At the same time, fault simulation solves the problem of assessing the quality of the test in the class of single constant defects. However, the computational complexity of obtaining deductive formulas, estimated as n3 , is a rather difficult task for high-dimensional RTL-level functional circuits, so the deductive method is usually used only for digital circuits represented at the gate level. Next, we propose a vector method for synthesis deductive formulas for digital schemes represented by RTL elements. This method became possible due to the element description of any complexity in the form of output states vector for combinational device. The model of xor-relationships between the wonderful logical functions (or, xor, and) of digital objects is improved, which is convoluted into zero-space. It makes possible to solve the problems of design and test, machine learning, search for similarities-differences, and destructive components in processes and phenomena. The advantages of the vector model for a compact description of objects, functions and structures are determined. It is proposed to replace analytical expressions that require algorithmically complex calculating, with vector data structures for describing functional logic. Vector-deductive method for synthesis formulas for transporting input fault lists is proposed. It has a quadratic computational complexity of register operations. The coordinate-vector model of defects is considered, not tied to input variables, which can be used for efficient processing of complex logic circuits when assessing the quality of synthesized tests. An algorithm for the synthesis of deductive vectors is presented, which differs from the known ones in the technological parallel processing simplicity of truth tables and makes it possible to create structural and logical conditions for simulating faults in digital projects of the gate, register and system description levels. An efficient method for the synthesis of a deductive truth table according to the rule L=T⊕F is proposed. It differs from the known ones by using vector-coordinate parallel xor-operation. It provides the transportation of faults through a functional element of arbitrary complexity.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124048580","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}
M. Polyakova, Dmitry Yu. Kozak, Natalia A. Huliaieva
As a result of the analysis of the literature, the based methods of face recognition on fragments of color images were identified. These are flexible comparison in graphs, hidden Markov models, principal component analysis, and neural network methods. The analyzed methods of face recognition are mainly characterized by significant computational costs and low recognition performance. An exception is the neural network methods of face recognition, which, after completing the training, make it possible to obtain a high recognition performance at low computational costs. However, when changing the prototype images of faces, it often becomes necessary to redefine the network architecture and retrain the network. The specificity of neural network methods is also the complexity of selecting the network architecture and its training. Such papers are devoted to the use of neural networks only for extraction of feature vectors of face images. The classification of the obtained feature vectors is then performed by known methods, namely, thresholding, a linear support vector machine, nearest neighbors, random forest. It has been observed that the lighting conditions in which the images were obtained and the turning of the head affect the shape of the separating surface and can decrease the feature vector classification performance for face images. Therefore, to improve the classification performance, it was decided to use correlation for prototype matching, a non-linear support vector machine and logistic regression. The performed experiment showed that correlation for prototype matching of low-light face images is characterized by higher classification performance compared to the thresholding. Moreover, the use of the Pearson and Spearman correlation coefficients showed similar results, and when using the Kendall correlation coefficient, the worst classification performance was obtained compared to the Pearson and Spearman coefficients. The research of the classification performance of images of faces that differ in head turn using correlation for prototype matching, a non-linear support vector machine and logistic regression showed the following. Correlation for prototype matching is more appropriate to use with small amounts of data due to the high classification performance and low computational complexity, since a small amount of data does not require a significant number of comparisons. However, on large amounts of data, the non-linear support vector machine requires less computation and shows similar classification performance. Using the results of the experiment, the researcher can select classification methods for a specific set of face images, preliminarily representing them with feature vectors using the network FaceNet.
{"title":"Comparative analysis of classifiers for face recognition on image fragments identified by the FaceNet neural network","authors":"M. Polyakova, Dmitry Yu. Kozak, Natalia A. Huliaieva","doi":"10.15276/hait.05.2022.7","DOIUrl":"https://doi.org/10.15276/hait.05.2022.7","url":null,"abstract":"As a result of the analysis of the literature, the based methods of face recognition on fragments of color images were identified. These are flexible comparison in graphs, hidden Markov models, principal component analysis, and neural network methods. The analyzed methods of face recognition are mainly characterized by significant computational costs and low recognition performance. An exception is the neural network methods of face recognition, which, after completing the training, make it possible to obtain a high recognition performance at low computational costs. However, when changing the prototype images of faces, it often becomes necessary to redefine the network architecture and retrain the network. The specificity of neural network methods is also the complexity of selecting the network architecture and its training. Such papers are devoted to the use of neural networks only for extraction of feature vectors of face images. The classification of the obtained feature vectors is then performed by known methods, namely, thresholding, a linear support vector machine, nearest neighbors, random forest. It has been observed that the lighting conditions in which the images were obtained and the turning of the head affect the shape of the separating surface and can decrease the feature vector classification performance for face images. Therefore, to improve the classification performance, it was decided to use correlation for prototype matching, a non-linear support vector machine and logistic regression. The performed experiment showed that correlation for prototype matching of low-light face images is characterized by higher classification performance compared to the thresholding. Moreover, the use of the Pearson and Spearman correlation coefficients showed similar results, and when using the Kendall correlation coefficient, the worst classification performance was obtained compared to the Pearson and Spearman coefficients. The research of the classification performance of images of faces that differ in head turn using correlation for prototype matching, a non-linear support vector machine and logistic regression showed the following. Correlation for prototype matching is more appropriate to use with small amounts of data due to the high classification performance and low computational complexity, since a small amount of data does not require a significant number of comparisons. However, on large amounts of data, the non-linear support vector machine requires less computation and shows similar classification performance. Using the results of the experiment, the researcher can select classification methods for a specific set of face images, preliminarily representing them with feature vectors using the network FaceNet.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"22 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116644564","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}
V. Gogunskii, K. Kolesnikova, Oleksii Ye. Kolesnikov, Janet O. Danso
The widespread use of mathematical modeling is often constrained by the insufficient level of technological maturity and the lack of theoretical foundations to justify the effectiveness of different classes of models. One of the ways to improve educational project management systems is to solve problems of modeling the structure and trajectory of changes in the parameters of the system in education management, as a complex poorly structured organizational and technical system. To solve the problem of analysis of structural schemes of complex technical systems, which include education systems, it is proposed to use the analytical methodof determining closed cycles in complex control systems. The method is based on the use of specific properties of adjacencymatrices. It is shown that the degrees of the adjacency matrix follow the general structure of the oriented graph with certain regularities of map-ping the arcs of the graph. This allows you to create a matrix of reach of the studied topological structure with the selection of con-tours in an oriented graph. A method for identifying cycles in graphs based on the formation of the Boolean sum of degrees ofthe reach matrix with its subsequent transposition and superposition has been developed, which allows obtaininga mapping of a contour in a graph in the form of a square submatrix filled with units.
{"title":"The study of the properties of structural models of elements of educational environment","authors":"V. Gogunskii, K. Kolesnikova, Oleksii Ye. Kolesnikov, Janet O. Danso","doi":"10.15276/hait.05.2022.5","DOIUrl":"https://doi.org/10.15276/hait.05.2022.5","url":null,"abstract":"The widespread use of mathematical modeling is often constrained by the insufficient level of technological maturity and the lack of theoretical foundations to justify the effectiveness of different classes of models. One of the ways to improve educational project management systems is to solve problems of modeling the structure and trajectory of changes in the parameters of the system in education management, as a complex poorly structured organizational and technical system. To solve the problem of analysis of structural schemes of complex technical systems, which include education systems, it is proposed to use the analytical methodof determining closed cycles in complex control systems. The method is based on the use of specific properties of adjacencymatrices. It is shown that the degrees of the adjacency matrix follow the general structure of the oriented graph with certain regularities of map-ping the arcs of the graph. This allows you to create a matrix of reach of the studied topological structure with the selection of con-tours in an oriented graph. A method for identifying cycles in graphs based on the formation of the Boolean sum of degrees ofthe reach matrix with its subsequent transposition and superposition has been developed, which allows obtaininga mapping of a contour in a graph in the form of a square submatrix filled with units.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134180912","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}
The study in the field of the structure of the processing architecture of a cybernetic suit for working with virtual reality was conducted. Nowadays it is relevant to use such a systems to implement various scenarios of rehabilitationfor people, as well as to conduct possible training sessions for operators of mechanized devices and so on. The goal is to achieve the highest possibleaccura-cy in repetition of the operator's movements, i.e. motion capture, at the lowest financial cost. The initial variant ofthe suit was creat-ed on the basis of Arduino and Unity 3D for visualization. 3D human model based on quaternion is built in Unity 3D which repeats all the real person twists and turns. But the first architecture had problems with performance and accuracy.A series of experiments was carried out to improve the effectiveness of the cybernetic suit prototypes. Thanks to the introduction of the proposed new type of architecture, namely the “controller-sensor”, it ispossible to completely get rid of the inaccuracy of the received data from the sen-sors. Also it allows removing the unauthorized change in the position of the body parts of the 3D model and increasingthe overall resistance and noise immunity of the product. Softwarebased on the algorithm for processing data from gyroscope and accelerometer sensors is presented, and the possibility of upgrading the design of the hardware part of the suit, aimed at optimizing the output char-acteristics, is described. To achieve the goal the most stable and noise-resistant transmission of primary data from cybernetic suit to a 3D model with the minimum possible number of errors in the data transmission buses was obtained. As a result, the modernization of the cybernetic suit for interaction with virtual reality has increased the accuracy of data from 66 % to 94.5 % and reduced the amount of interference from 40.59 % to 5.5 %.
{"title":"Cybernetic suit for interaction with virtual reality","authors":"V. Ruvinskaya, A. Troynina, Dmytro V. Zybin","doi":"10.15276/hait.05.2022.2","DOIUrl":"https://doi.org/10.15276/hait.05.2022.2","url":null,"abstract":"The study in the field of the structure of the processing architecture of a cybernetic suit for working with virtual reality was conducted. Nowadays it is relevant to use such a systems to implement various scenarios of rehabilitationfor people, as well as to conduct possible training sessions for operators of mechanized devices and so on. The goal is to achieve the highest possibleaccura-cy in repetition of the operator's movements, i.e. motion capture, at the lowest financial cost. The initial variant ofthe suit was creat-ed on the basis of Arduino and Unity 3D for visualization. 3D human model based on quaternion is built in Unity 3D which repeats all the real person twists and turns. But the first architecture had problems with performance and accuracy.A series of experiments was carried out to improve the effectiveness of the cybernetic suit prototypes. Thanks to the introduction of the proposed new type of architecture, namely the “controller-sensor”, it ispossible to completely get rid of the inaccuracy of the received data from the sen-sors. Also it allows removing the unauthorized change in the position of the body parts of the 3D model and increasingthe overall resistance and noise immunity of the product. Softwarebased on the algorithm for processing data from gyroscope and accelerometer sensors is presented, and the possibility of upgrading the design of the hardware part of the suit, aimed at optimizing the output char-acteristics, is described. To achieve the goal the most stable and noise-resistant transmission of primary data from cybernetic suit to a 3D model with the minimum possible number of errors in the data transmission buses was obtained. As a result, the modernization of the cybernetic suit for interaction with virtual reality has increased the accuracy of data from 66 % to 94.5 % and reduced the amount of interference from 40.59 % to 5.5 %.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129095829","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}
The paper deals with the characteristics of remote sensing systems for forest fires and the analysis of their consequences in terms of burned areas. . The capabilities of the American system FIRMS and the complex European system EFFIS are considered. Algorithms and methods for processing medium resolution satellite observations (MODIS) are analyzed. These images are from Terra and Aqua satellites, namely Land MOD14 / MYD14 for active fire detection and MCD45 for burned areas. The results of a comparative analysis of the best known services MCD45A1, MCD64A1, MCD14ML and ESA's Fire_CCMCD45 service from MCD45 are presented. Their capabilities for monitoring burned areas were compared. It is shown that in the absence of a common state system of remote sensing in Ukraine, it is necessary to use the capabilities of modern, publicly available geographic information systems. For example, the cloud service Google Earth Engine (GEE) is used to retrieve and process satellite data on forest fires and their consequences. The use of GEE makes it possible to obtain geospatial data of forest fire zones and their consequences. These parameters are determined by the date, region, type of multichannel satellite and its channels (layering). Based on this information, a method for processing, analyzing and visualizing geodata of forest fires and their consequences was developed. The method consists of five steps, namely: obtaining input data from publicly available geographic information web services; pre-processing (filtering) of multi-channel satellite images; calculation of indexed images; their thresholding; storing the original data in cloud storage. The following recommendations are developed: on the selection of spectral indices; construction and use of radiometric correctionmasks; clouds; and a water mask. The study on the possibility of methods to detect forest fires and their consequences is implemented using Google Earth Engine. Comparative characteristics of the number and area of forest fires obtained from the general statisticaldata using the proposed method are given. The implementation of the proposed method has increased the efficiency of detection of dangerous areas.
{"title":"Methods of analysis and visualization of active fires and burnt areas of geospatial data","authors":"Olena Arsirii, Hristo Krachunov, Sergiy Smyk, Yuliia Troianovska","doi":"10.15276/hait.05.2022.6","DOIUrl":"https://doi.org/10.15276/hait.05.2022.6","url":null,"abstract":"The paper deals with the characteristics of remote sensing systems for forest fires and the analysis of their consequences in terms of burned areas. . The capabilities of the American system FIRMS and the complex European system EFFIS are considered. Algorithms and methods for processing medium resolution satellite observations (MODIS) are analyzed. These images are from Terra and Aqua satellites, namely Land MOD14 / MYD14 for active fire detection and MCD45 for burned areas. The results of a comparative analysis of the best known services MCD45A1, MCD64A1, MCD14ML and ESA's Fire_CCMCD45 service from MCD45 are presented. Their capabilities for monitoring burned areas were compared. It is shown that in the absence of a common state system of remote sensing in Ukraine, it is necessary to use the capabilities of modern, publicly available geographic information systems. For example, the cloud service Google Earth Engine (GEE) is used to retrieve and process satellite data on forest fires and their consequences. The use of GEE makes it possible to obtain geospatial data of forest fire zones and their consequences. These parameters are determined by the date, region, type of multichannel satellite and its channels (layering). Based on this information, a method for processing, analyzing and visualizing geodata of forest fires and their consequences was developed. The method consists of five steps, namely: obtaining input data from publicly available geographic information web services; pre-processing (filtering) of multi-channel satellite images; calculation of indexed images; their thresholding; storing the original data in cloud storage. The following recommendations are developed: on the selection of spectral indices; construction and use of radiometric correctionmasks; clouds; and a water mask. The study on the possibility of methods to detect forest fires and their consequences is implemented using Google Earth Engine. Comparative characteristics of the number and area of forest fires obtained from the general statisticaldata using the proposed method are given. The implementation of the proposed method has increased the efficiency of detection of dangerous areas.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122445194","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}
An analytical model of the system has been developed, consisting of a parallel-series connection of thermal devices. On the basis of graph theory, a system of equations of communication between the graphical representation of the system and the table of integers, which are the numbers of nodes and branches, is presented. Mathematical formalization made it possible to create a data representation that describes the distribution of temperatures in the nodes of the system and flows on its branches and reduce the volume of the problem based on expert estimates corresponding to the second law of thermodynamics.The chains and routes of heat distribution in the network of heat exchangers, including input and output elements, distribution and mixing units, are considered. The presented data structure provides an opportunity to programmatically build a system of energy balance equations for the system. The system of equations is supplemented by the hypothesis of the proportionality of the change in the measure of energy in the element to the potential applied to them.As a result, a system of equations is obtained, which forms a complete problem written in matrix form. In the design problem, after determining the requirements for the system, in the mathematical sense, the problem arises of determining the elements of the matrix by the value of the determinant. The requirement of equilibrium in the nodes of mixing flows, together with the conservation law, allows us to formulate a complete system of equationsthat determines the distribution of flows on the branches of networks.The principle of minimum uncertainty allows us to identify a group of roots that has maximum efficiency when the principle of equilibrium is fulfilled for the elements of the system. An example is presented that implements the exact scheme for solving the design problem for a given ratio of flows at the input to the system and the requirement for itsefficiency.
{"title":"Improvement of design of heat networks:parallel-series connection","authors":"Georgy Derevyanko, V. Mescheryakov","doi":"10.15276/hait.05.2022.3","DOIUrl":"https://doi.org/10.15276/hait.05.2022.3","url":null,"abstract":"An analytical model of the system has been developed, consisting of a parallel-series connection of thermal devices. On the basis of graph theory, a system of equations of communication between the graphical representation of the system and the table of integers, which are the numbers of nodes and branches, is presented. Mathematical formalization made it possible to create a data representation that describes the distribution of temperatures in the nodes of the system and flows on its branches and reduce the volume of the problem based on expert estimates corresponding to the second law of thermodynamics.The chains and routes of heat distribution in the network of heat exchangers, including input and output elements, distribution and mixing units, are considered. The presented data structure provides an opportunity to programmatically build a system of energy balance equations for the system. The system of equations is supplemented by the hypothesis of the proportionality of the change in the measure of energy in the element to the potential applied to them.As a result, a system of equations is obtained, which forms a complete problem written in matrix form. In the design problem, after determining the requirements for the system, in the mathematical sense, the problem arises of determining the elements of the matrix by the value of the determinant. The requirement of equilibrium in the nodes of mixing flows, together with the conservation law, allows us to formulate a complete system of equationsthat determines the distribution of flows on the branches of networks.The principle of minimum uncertainty allows us to identify a group of roots that has maximum efficiency when the principle of equilibrium is fulfilled for the elements of the system. An example is presented that implements the exact scheme for solving the design problem for a given ratio of flows at the input to the system and the requirement for itsefficiency.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132039017","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}
S. Antoshchuk, Sergey B. Kondratyev, G. Shcherbakova, Mykola A. Hodovychenko
This paper is aimed to develop a method for a depth map generation based on objects localization in images, obtained through a stereopair. The proposed solution describes the objects by the following informative elements: contours, interest points (points of the greatest curvature of the contour), center of mass of the object. Moreover, to describe the contour of the image, it is proposed to use methods with adjustable detailing, based on the wavelet transform, which has frequency-selective properties. The novelty of this method is the possibility of obtaining an approximate depth map by simplifying the calculation of stereo image difference values, which is traditionally used to generate a depth map. Software was developed based on the proposed solutions. Modeling confirmed the effectiveness of the proposed approach. The proposed method makes it possible to significantly reduce the number of computational operations and, consequently, improve depth map generation performance and recommend the proposed method for mobile navigation systems operating in conditions of limited computing and energy resources. The method provides object detection and spatial positioning, makes it possible to obtain reliable information about the distance to objects for other subsystems that use technical vision in their operation, for example, navigation systems for visually impaired people, robotic devices, etc.
{"title":"Depth map generation for mobile navigation systems based on objects localization in images","authors":"S. Antoshchuk, Sergey B. Kondratyev, G. Shcherbakova, Mykola A. Hodovychenko","doi":"10.15276/hait.05.2022.1","DOIUrl":"https://doi.org/10.15276/hait.05.2022.1","url":null,"abstract":"This paper is aimed to develop a method for a depth map generation based on objects localization in images, obtained through a stereopair. The proposed solution describes the objects by the following informative elements: contours, interest points (points of the greatest curvature of the contour), center of mass of the object. Moreover, to describe the contour of the image, it is proposed to use methods with adjustable detailing, based on the wavelet transform, which has frequency-selective properties. The novelty of this method is the possibility of obtaining an approximate depth map by simplifying the calculation of stereo image difference values, which is traditionally used to generate a depth map. Software was developed based on the proposed solutions. Modeling confirmed the effectiveness of the proposed approach. The proposed method makes it possible to significantly reduce the number of computational operations and, consequently, improve depth map generation performance and recommend the proposed method for mobile navigation systems operating in conditions of limited computing and energy resources. The method provides object detection and spatial positioning, makes it possible to obtain reliable information about the distance to objects for other subsystems that use technical vision in their operation, for example, navigation systems for visually impaired people, robotic devices, etc.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"927 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122591187","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}
I. Sinchuk, A. Somochkyn, K. Budnikov, Svitlana V. Somochkyna, Vladyslav D. Baranovskyi, O. Danilin
The natural presence of water in underground mining processes creates significant difficulties and requires constant water drainage, i.e. pumping water to the day surface into special reservoirs. The so-called main drainage complexesare used for perform-ing these operations. Mine water drainage is an energy-consuming process. Therefore, the need to reduce energy intensity of water drainage complexes is a relevant task, which is so far unsolved to a level that is fully adequate. To solve the above-mentioned prob-lem on a systemic basis, it is of primary importance to assesstools of improving energy efficiency of water drainage complexes ac-cording to their efficiency levels. It is vital for further formatting the scientific search for options that possess sufficient efficiency. For such technology-intensive types of consumers as underground mines, modeling of power consumption is an effective and afford-able method of obtaining preventive results, which are close to real-life conditions. Of course, the level of adequacy of the modeling results obtained depends on compliance of input parameters of a model with real values. Such a model of the electric power system as a complex of groundwater drainage to the day surface can be used as a supporting option for modeling in order to get the required results for both developing energy-efficient control measures for drive electromechanical complexes and designing an effective struc-ture of the entire drainage complex. It is in this perspective that the research methodology is built, the results of which are outlined in the article.Modeling the levels of efficiency in the use of some modern trends in improving the operation of drainage complexes of iron ore underground production made it possible to rank them according to the levels of implementation, starting with the use of controlled electric drives and ending with the optimization of their operating modes.
{"title":"Modelingtoolsforimprovingenergyefficiencyofwaterdrainagecomplexesatironoreunderground mines","authors":"I. Sinchuk, A. Somochkyn, K. Budnikov, Svitlana V. Somochkyna, Vladyslav D. Baranovskyi, O. Danilin","doi":"10.15276/hait.04.2022.4","DOIUrl":"https://doi.org/10.15276/hait.04.2022.4","url":null,"abstract":"The natural presence of water in underground mining processes creates significant difficulties and requires constant water drainage, i.e. pumping water to the day surface into special reservoirs. The so-called main drainage complexesare used for perform-ing these operations. Mine water drainage is an energy-consuming process. Therefore, the need to reduce energy intensity of water drainage complexes is a relevant task, which is so far unsolved to a level that is fully adequate. To solve the above-mentioned prob-lem on a systemic basis, it is of primary importance to assesstools of improving energy efficiency of water drainage complexes ac-cording to their efficiency levels. It is vital for further formatting the scientific search for options that possess sufficient efficiency. For such technology-intensive types of consumers as underground mines, modeling of power consumption is an effective and afford-able method of obtaining preventive results, which are close to real-life conditions. Of course, the level of adequacy of the modeling results obtained depends on compliance of input parameters of a model with real values. Such a model of the electric power system as a complex of groundwater drainage to the day surface can be used as a supporting option for modeling in order to get the required results for both developing energy-efficient control measures for drive electromechanical complexes and designing an effective struc-ture of the entire drainage complex. It is in this perspective that the research methodology is built, the results of which are outlined in the article.Modeling the levels of efficiency in the use of some modern trends in improving the operation of drainage complexes of iron ore underground production made it possible to rank them according to the levels of implementation, starting with the use of controlled electric drives and ending with the optimization of their operating modes.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124264601","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}
O. Sinchuk, R. Strzelecki, I. Sinchuk, Andriy I. Kupin, T. Beridze, Кyrylo V. Budnikov
The work investigates into variable informational approaches to modeling power consumption by main drainage facilities of ore mining enterprises with underground mining method. Methodological recommendations for using the models are also designed. The research deals with general methodological approaches to model formation with both power consumption indices for drainage facilities and corresponding costs. Logistics of model formation is substantiated, namely, combination of classic multifactor regression modeling with modern digital modeling methods – automated control systems used for drainage facilities. Principles of building fuzzy logic controllers and algorithms of their functioning under multichannel control are determined in detail. The improved fuzzy logic-based variant is proposed and combined, with correlation analysis, to provide the basis for developing algorithms of the automated control systems of electric power consumption. There is an example of developing a “road map” for implementing a generalized algorithm for automated control systems power flows for two current cases – a selective tariff with limited daily contract-based power consumption and that with a variable tariff. It is established that application of the two-rate hourly tariff with its conditional distribution (Night/Peak) instead of the three-rate tariff (Night/Half-Peak/Peak) on a single-use basis leads to a thirteen percent increase of daily power costs with a single-channel control of the ore flow and a seven percent increase with two-channel control (ore flow and drainage simultaneously). The use of fuzzy logic controllers enables minimizing these losses.
{"title":"Informational aspects at model of power consumption by main drainage facilities of iron-ore mining enterprises","authors":"O. Sinchuk, R. Strzelecki, I. Sinchuk, Andriy I. Kupin, T. Beridze, Кyrylo V. Budnikov","doi":"10.15276/hait.04.2021.5","DOIUrl":"https://doi.org/10.15276/hait.04.2021.5","url":null,"abstract":"The work investigates into variable informational approaches to modeling power consumption by main drainage facilities of ore mining enterprises with underground mining method. Methodological recommendations for using the models are also designed. The research deals with general methodological approaches to model formation with both power consumption indices for drainage facilities and corresponding costs. Logistics of model formation is substantiated, namely, combination of classic multifactor regression modeling with modern digital modeling methods – automated control systems used for drainage facilities. Principles of building fuzzy logic controllers and algorithms of their functioning under multichannel control are determined in detail. The improved fuzzy logic-based variant is proposed and combined, with correlation analysis, to provide the basis for developing algorithms of the automated control systems of electric power consumption. There is an example of developing a “road map” for implementing a generalized algorithm for automated control systems power flows for two current cases – a selective tariff with limited daily contract-based power consumption and that with a variable tariff. It is established that application of the two-rate hourly tariff with its conditional distribution (Night/Peak) instead of the three-rate tariff (Night/Half-Peak/Peak) on a single-use basis leads to a thirteen percent increase of daily power costs with a single-channel control of the ore flow and a seven percent increase with two-channel control (ore flow and drainage simultaneously). The use of fuzzy logic controllers enables minimizing these losses.","PeriodicalId":375628,"journal":{"name":"Herald of Advanced Information Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131758035","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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