Suchasni informatsiini sistemi最新文献

{"title":"Application of systems of orthogonal functions for formation of sign space in image classification methods","authors":"V. Gorokhovatskyi, I. Tvoroshenko, Yurii Chmutov","doi":"10.20998/2522-9052.2022.3.01","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.01","url":null,"abstract":"The subject of the article's research is the improvement of structural methods of image classification in computer vision systems. The goal is to reduce computational costs for classification by implementing a device for decomposing image description components using a system of orthogonal functions and implementing feature space compression models. Applied methods: ORB key point detector, set theory apparatus and vector spaces, metric models for determining relevance to sets of multidimensional vectors, theory of orthogonal decomposition of vectors, elements of probability theory, software modeling. Obtained results: modifications of the image classification method based on the introduction of orthogonal data decomposition in vector space were developed, models were proposed for data compression in the transformed feature space, Tanimoto metric was introduced for image comparison, a threshold selection method was established for determining equivalent description components. The effectiveness of the developed modifications of the classifier depends on the selection of a subset of functions for decomposition, the metric for comparing descriptions, and the method of determining the equivalence threshold. The implementation of the apparatus of orthogonal functions not only reduced computational costs tenfold, but also ensured sufficiently high indicators of classification performance and interference resistance. The practical significance of the work is the construction of new models of the image classifier in the transformed space of features, confirmation of the functionality, speed and immunity of the proposed modifications on examples of images, the creation of a software application for the implementation of the developed classification methods in computer vision systems.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43676001","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":"TEMPORAL-ORIENTED MODEL OF CAUSAL RELATIONSHIP FOR CONSTRUCTING EXPLANATIONS FOR DECISION-MAKING PROCESS","authors":"S. Chalyi, V. Leshchynskyi","doi":"10.20998/2522-9052.2022.3.09","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.09","url":null,"abstract":"The subject of research in the article is the decision-making process in intelligent systems. The goal is to develop a model of the causal relationship between the states of the decision-making process in an intelligent information system, taking into account the temporal aspect of this process, in order to build cause-and-effect relationships between the actions of the process and further use these dependencies to form explanations for the sequence of actions to obtain a decision. The formation of causal relations between the states of the decision-making process makes it possible to substantiate the sequence of actions of this process, considering incomplete information regarding external influences on this process. Tasks: structuring the decision-making process in an intelligent information system as a specialized business process; development of a three-element model of the causal relationship between the states of the decision-making process, considering the temporal aspect of this process; substantiation of the possibility of using three-element relationships to build causal dependencies for decision making in intelligent systems. The approaches used are: the set-theoretical approach used to describe the elements of the decision-making process in intelligent systems; a logical approach that provides a representation of the relationship between the states of the decision-making process; probabilistic approach to describe the probabilistic component of the decision-making process. The following results are obtained. The decision-making process in an intelligent information system was structured as a specialized business process that, using additional information from the user, turns the input data into a result that is valuable for this user; a three-element model of the causal relationship between the states of the decision-making process is proposed, which makes it possible to take into account external influences on the process; using a probabilistic approach, the possibility of using three-element causal relations to describe the decision-making process in intelligent systems is substantiated, taking into account uncontrolled external influences. Conclusions. The scientific novelty of the obtained results is as follows. A three-element model of the causal relationship between the states of the decision-making process is proposed, based on a model of a temporal rule of the \"future\" type, containing a state-cause, a state-effect and an intermediate state that reflects external influences. The model makes it possible to build a base of cause-and-effect dependencies for the decision-making process in an intelligent information system, considering external influences and use these dependencies to build explanations for this process.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44098232","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":"EFFECT OF AMBIENT TEMPERATURE ON THERMODYNAMIC TEMPERATURE MEASUREMENTS","authors":"N. Iskandarov","doi":"10.20998/2522-9052.2022.3.07","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.07","url":null,"abstract":"The development of science and technology is closely related to the use of measuring instruments. Measurements are one of the ways to know nature as a process and help to make scientific discoveries and apply these discoveries in production and technology. Measurements are also of great importance as the only means of monitoring technological processes in various fields of industry and production processes. Properly organized measurements ensure the reliability, economy and convenience of conducting production processes, as well as provide opportunities for their extensive automation. In addition, it is not possible to provide safe and trouble-free maintenance of production processes and facilities without using measurement tools. Today, the national economy of the country is provided with a large arsenal of measuring instruments of both domestic and foreign production, from the simplest primary converters and measuring devices to complex automatic tools and systems that allow controlling technological devices and complex production using information and computers. A wide variety of measuring tools requires the right choice for specific purposes. In this regard, one of the important issues is the question of their metrological assurance. Accurate and correct measurements performed during technological processes lead to an increase in product quality, a reduction in waste products, as well as a minimization of time and material losses. For this reason, ensuring the accuracy of temperature measurements performed in technological processes is one of the most urgent issues today. The research work has shown that the most important part of the error of the temperature measurements is the influence of the environment on the measurement process. For this reason, the amount of this effect was determined and analyzed during the research work. \u0000 ","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48042926","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":"Calculation of the value of the functions of the complex variable with by an interval argument, we will design in the hyperbolic form","authors":"V. Dubnitskiy, A. Kobylin, O. Kobylin, Yuri Kushneruk, I. Sheviakov","doi":"10.20998/2522-9052.2022.3.11","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.11","url":null,"abstract":"Information about the interval numbers presented in the classical form, the CENTER-RADIUS system and in the hyperbolic form is given. Rules for the transition from one of the forms of representation of interval numbers to others are proposed. Information is given on complex interval numbers, the real and imaginary parts of which are presented in hyperbolic form. The rules for performing basic arithmetic operations with these numbers and the calculation of interval values of power, exponential, logarithmic functions, direct and inverse trigonometric functions, direct and inverse hyperbolic functions are described. For functions of a complex variable, information about their real and imaginary parts is given. The list of functions corresponds to the functions of a complex variable included in the EXCEL system. Relationships are obtained for determining the real and imaginary parts of the secant, cosecant, tangent and cotangent functions for circular trigonometric and hyperbolic functions, which were absent in the most common reference literature. It is shown that the operations of multiplication, division and raising to an integer power are most appropriate to perform with complex interval numbers, which are defined in hyperbolic form. The operation of calculating the root of degree n from an interval complex number presented in hyperbolic form is most expediently performed using the CENTER-RADIUS system in combination with the hyperbolic form of representing the interval number. Relationships are obtained that make it possible to obtain a function of an interval complex variable equivalent to the original one and suitable for further work with complex functions and numbers presented in hyperbolic form and in the CENTER-RADIUS system. Examples illustrating the application of the proposed technique are given.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43201536","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":"STATIC ALLOCATION METHOD IN A CLOUD ENVIRONMENT WITH A SERVICE MODEL IAAS","authors":"Inna Petrovska, Heorhii Kuchuk","doi":"10.20998/2522-9052.2022.3.13","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.13","url":null,"abstract":"The article discusses a method that allows the allocation of the required computing resources for the initial launch of a virtual host. The method is focused on the functioning of a virtual host in a cloud environment focused on the service model \"Infrastructure as a Service\". The subject of research is the methods of static resource allocation in cloud environments. The object of study is the process of functioning of a virtual host in a cloud environment that provides all information technology resources for it. The purpose of the study is to develop a method for the static allocation of resources in the cloud environment, focused on the features of the service model \"Infrastructure as a Service\". Results: An approach has been developed for carrying out the decomposition of a cloud computing environment with the IAAS service model. The analysis of existing methods of static allocation of resources has been carried out. The application of the method of analysis of hierarchies for this problem is substantiated. A step-by-step algorithm for finding the most acceptable alternative from the set proposed has been developed. An example of the application of the developed method for initializing a virtual host in a cloud environment with the IAAS service model is given. Conclusion. The proposed method makes it possible to rationally use the computing resources of the cloud environment, which uses the \"Infrastructure as a Service\" service model. Direction for further research. The development of this direction is the development of a method for dynamic redistribution of resources in a cloud environment with the IAAS service model.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47482447","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":"EXPERIMENTAL UNIT FOR DETERMINING BODY WEIGHT OF ASTRONAUTS AND LIGHT-WEIGHT OBJECTS IN ZERO-GRAVITY CONDITIONS","authors":"O. Kolomiitsev, V. Komarov, O. Dmitriiev, V. Pustovarov, R. Oliinyk","doi":"10.20998/2522-9052.2022.3.12","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.12","url":null,"abstract":"The transition of an astronaut into zero gravity leads to a certain restructuring of the body, including the redistribution of fluid flows in it. The process of dehydration of the body is stimulated, the astronaut loses weight. Knowledge of the regularities of changes in an astronaut's body weight, keeping it within normal limits thanks to a rational load distribution, rest, physical exercises, and a well-thought-out diet are extremely necessary in order to provide the astronaut with the most favorable conditions for adaptation in zero gravity, as well as to better prepare him for his return to Earth. Returning materials for scientific research and experiments, as well as equipment, from the space station to Earth also requires high-precision determination of the low weight of objects. The object of the research is an experimental unit that allows measuring the weight (parameters) of the astronaut’s body and the small weight of objects (equipment, devices, etc.) that oscillate. The subject of research is the frequency of natural oscillations of the dynamic system. The purpose of scientific work is the development of an experimental unit for determining the weight of the astronaut’s body and the low weight of objects in zero gravity. Conclusions. An experimental setup for determining the body weight of astronauts and the low weight of objects (control objects – СО) in zero gravity is proposed. For high-precision determination of the weight of the СО in zero gravity, the natural frequency (NF) was chosen as a diagnostic parameter. In the experimental installation, the weight of the OC is determined by changing the NF of the dynamic system \"control object – moving anchor\" depending on the attached weight of the СO. The essence of the work of the experimental unit is revealed, and its general appearance and structural scheme are presented.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46485242","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":"PARAMETRIC SYNTHESIS OF AN ELECTRO-HYDRAULIC EXECUTIVE DEVICE OF A DIGITAL SYSTEM OF AUTOMATIC CONTROL OF A MOVING OBJECT","authors":"E. Aleksandrov, T. Aleksandrova, I. Kostianyk, Y. Morgun","doi":"10.20998/2522-9052.2022.3.05","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.05","url":null,"abstract":"Most modern moving objects, including military moving objects, are equipped with guidance and stabilization systems with electro-hydraulic executive devices. Intercontinental ballistic missiles, space vehicles, aircraft, the main armament of tanks and ships have high-precision digital guidance and stabilization systems with electro-hydraulic actuators with potentiometric feedback, capable of ensuring high accuracy of stabilization of a moving object in a given direction. The work is devoted to the development of a methodology for selecting the value of the feedback channel amplification coefficient, which provides the maximum margin of stability and the maximum speed of the closed digital system of guidance and stabilization of a moving object. The proposed technique is based on the application of a discrete-continuous mathematical model of a closed digital system of guidance and stabilization of a moving object, which contains ordinary differential equations for describing the disturbed motion of the continuous part of the stabilized object, as well as difference equations for describing a discrete stabilizer. To construct the characteristic equation of a closed discrete system, the mathematical model is reduced to a system of difference equations using matrix series. At the same time, the number of considered members of the matrix series depends on the value of the quantization period of the digital stabilizer, therefore, in addition to determining the amplification coefficient of the feedback channel of the executive device, the proposed technique also includes the determination of the value of the quantization period of the digital stabilizer.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68225316","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":"Use of dispersion analysis in building a model of factor influence on the result of remote thermal control of biological objects","authors":"Ihor Hryhorenko, S. Hryhorenko, Oleksandr K. Zhuk","doi":"10.20998/2522-9052.2022.3.03","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.03","url":null,"abstract":"The solution to the scientific and practical problem of using dispersion analysis to build a model of factor influence on the result of remote thermal control of biological objects is considered. A model of the effect on the result of measuring the temperature of a biological object of four factors that negatively affect the accuracy of temperature measurement is presented, namely: air temperature, air dustiness, global radiation brightness, air humidity. The scheme of action of the specified factors is considered. In practice, it is not always possible to measure the temperature of a person or an animal by means of non-contact control by choosing a place in advance in which the influence of factors that negatively affect the accuracy of temperature measurement is not manifested during the measurement process. Therefore, it is necessary to develop a factor influence model that will take into account the most important factors that negatively affect the measurement result. This can be done using variance analysis. It was concluded that the obtained results enable further improvement of the methods of processing the results of non-contact temperature measurement of biological objects. Prospects for further research of the developed model are presented, namely, that it is possible to obtain an equation for evaluating the reliability of statistical conclusions about the informational significance of temperature control indicators; obtaining analytical ratios that will make it possible to estimate the amount of information for each of the temperature control indicators under the factorial influence on the transformation function of these indicators in order to rank the temperature control indicators according to the decrease in their sensitivity to changes in the temperature control parameter levels.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41650518","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":"DEVELOPMENT OF THE ESTIMATING METHODOLOGY OF A 5TDF ENGINE MOTOR RESOURCE CONSUMPTION UNDER DIFFERENT OPERATING MODES OF THE MACHINE","authors":"H. Makogon, V. Sirosh, Serhiy Guba, O. Lavrut, Sergiy Zagrebelnuy, A. Rudiy","doi":"10.20998/2522-9052.2022.3.08","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.08","url":null,"abstract":"The subject matter of the article is accounting for the motor resource of the 5TDF tank engine under different operating modes.  The goal of the study is to development of a methodology for estimating the consumption of a motor resource of a 5TDF engine under different operating modes of the machine. The tasks to be solved are: based on the analysis of data on the operating modes of the 5TDF engine, to determine a set of parameters that give empirical and analytical estimates of the consumption of the motor resource of the machine; to request analytical estimates of the consumption of the 5TDF engine motor resource in terms of the number of years’ service in different machine operating modes; to propose a mechanism for the processing of numerical values, depending on the results of the statistical processing of these machine operation data. General scientific and special methods of scientific knowledge are used. The following results were obtained: A continuous functional dependence of the actual number of hours spent by the engine on the values of the meter per hours at different speeds, allow more careful accounting of engine consumption, but will involve the development of special devices based on modern elements has been determined. Conclusions. It is possible to make a conclusion about the nonlinear nature of the dependence of the engine life on time with different engine operation at different load modes. Engine operating modes, which are determined by load resistance, are characterized by the number of revolutions of the engine crankshaft and the amount of power developed by the engine, largely determine its energy and economic performance of the engine and engine consumption. The testing ground for the consumption of the motor resource of the machine, depending on the readings of the engine hours counter, can be formed on the basis of the data obtained from the results of the operation of the machine in different conditions. The analysis of the results of the research carried out that finding dependence of a 5tdf engine motor resource can be presented as the sum of two regressions ‒ linear and hyperbolic. The readings of the engine hours counter will be recorded and further processed when the 5TDF engine is running in I-V and VI, VII gears, respectively. Such realization will make it possible to use the regression equation directly for the car crew.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45817962","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":"DEVELOPMENT OF AN IMPROVED HIERARCHICAL CONTROL SYSTEM USING THE METAHEURISTIC PID TUNER FOR DC MICROGRIDS","authors":"E. Yusubov, Lala Bekirova","doi":"10.20998/2522-9052.2022.3.06","DOIUrl":"https://doi.org/10.20998/2522-9052.2022.3.06","url":null,"abstract":"This paper presents the development of the improved hierarchical control system using the metaheuristic centralized PID tuner for DC microgrids. Hierarchical control is one of the best control strategies employed in photovoltaics (PV) based DC microgrids with three layers of primary, secondary, and tertiary controllers in which PID control is at the center of each one of these three layered control levels. The principal objective of the primary controller is to ensure near-equal power sharing among the units and of the secondary controller is to correct the deviations in the common DC link, while the tertiary controller is used to manage the energy flow among DC microgrids or between DC microgrid and the main utility grid. Partial shading, the uncertain nature of solar irradiation, and varying temperatures significantly reduce the overall power efficiency of traditionally tuned PID control-based hierarchical systems, since the tuning gains of these PID controllers are not adaptive to the dynamic processes. To optimize the control process, a novel hierarchical system is considered in which PID gains of primary, secondary, and tertiary controllers are tuned with metaheuristic moth-flame optimization to adapt to the variations. Matlab/Simulink simulations are performed to verify the efficiency of the proposed approach. The results highlight the superiority of the proposed method by utilizing process adaptive gains.","PeriodicalId":34701,"journal":{"name":"Suchasni informatsiini sistemi","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45513718","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}