Mykhailo Shyshkin | National Technical University "Kharkiv Polytechnic Institute" (original) (raw)
Papers by Mykhailo Shyshkin
2018 IEEE 3rd International Conference on Intelligent Energy and Power Systems (IEPS), 2018
To compensate for power pulsations in the DC power supply network used battery energy storage sys... more To compensate for power pulsations in the DC power supply network used battery energy storage system (BESS) is proposed. To ensure the normal operation of the BESS, it is necessary to use service converters that provide balancing of voltage levels on series-connected storages. The modes of operation of converters of this class are analyzed. The efficiency of the use of capacitive and inductive buffer elements in the structure of active balancing systems is determined. A balancing system with improved characteristics based on transformer topology and a forecasting control system is proposed
IFMBE Proceedings, 2019
Today, one of the main directions in the diagnosis of the heart is the study of long-term registr... more Today, one of the main directions in the diagnosis of the heart is the study of long-term registrations and analysis of statistical data of cardintervals (RR-intervals) and amplitudes of various sections of the ECG. However, the processing of a complete cardiogram in real time and its transfer for analysis using wireless communication lines is quite problematic due to the large data volume and high requirements for the processing power of the processing system. The article proposed the method of using coherence functions for a sequence of RR intervals, which make it possible with high accuracy to determine the onset of atrial fibrillation. This type of heart disease is one of the potentially lethal and its occurs mostly hidden. However, atrial fibrillation increases the risk of stroke by 6–8 times. This method does not require the exchange of large amounts of data and can be used in wearable cardiomonitoring devices.
The subject matter is a mathematical model describing the process of heart rhythm variability, wh... more The subject matter is a mathematical model describing the process of heart rhythm variability, which is based on the use of triangular models of non-stationary random processes in the Hilbert space. The goal of the research is to develop a mathematical model of non-stationary processes of cardiac activity based on a triangular model. This research was the basis for the development of a Matlab model that implements the proposed method for analyzing heart rate variability. Tasks are: to give a description of the variability heart rate as a non-stationary process in Hilbert space in terms of correlation functions; to research the possibility of constructing a correlation and spectral theory of a non-stationary process using triangular models; to synthesize the mathematical model of nonstationary process on the basis of correlation theory for solving mathematical processing and forecasting tasks on the basis of ECG data. Using the proposed mathematical method, we implemented the Matlab ...
Innovative Technologies and Scientific Solutions for Industries, 2019
The subject matter is a mathematical model describing the process of heart rhythm variability, wh... more The subject matter is a mathematical model describing the process of heart rhythm variability, which is based on the use of triangular models of non-stationary random processes in the Hilbert space. The goal of the research is to develop a mathematical model of nonstationary processes of cardiac activity based on a triangular model. This research was the basis for the development of a Matlab model that implements the proposed method for analyzing heart rate variability. Tasks are: to give a description of the variability heart rate as a non-stationary process in Hilbert space in terms of correlation functions; to research the possibility of constructing a correlation and spectral theory of a non-stationary process using triangular models; to synthesize the mathematical model of nonstationary process on the basis of correlation theory for solving mathematical processing and forecasting tasks on the basis of ECG data. Using the proposed mathematical method, we implemented the Matlab m...
2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON), 2019
The article presents the statistical models sensitive to spectral non-stationarity, the identific... more The article presents the statistical models sensitive to spectral non-stationarity, the identification of which in local time intervals represents an independent problem for both continuous and periodically non-stationary processes. This model has been tested for detection of atrial fibrillation based on an analysis of PP intervals during Holter monitoring. The results showed the possibility of increasing the reliability of detection to a value above 0.997.
2019 XXIX International Scientific Symposium "Metrology and Metrology Assurance" (MMA), 2019
Today, one of the most actual problems of cardiology is to obtain comprehensive data in everyday ... more Today, one of the most actual problems of cardiology is to obtain comprehensive data in everyday life to determine current cardiac states, including hidden pathologies, their interpretation and analysis. This article proposes a new method for processing measurements obtained during Holter monitoring and using only the value of the intervals between R peaks of ECG. These peaks have the biggest amplitude and their determination does not present technical difficulties. The improved graphical analysis method proposed by the authors, “Speed Spot”, allows to take into account not only the data of heart rate variability, but also includes an integral characteristic of the rate of change of the variability components. The method was used to determine the type of pathology as atrial fibrillation (AF). To confirm the effectiveness of the proposed method for the detection of arrhythmias, the Atrial Fibrillation Database of www.physionet.org was used, containing records of both normal and arrhy...
The use of graphical methods to determine hidden heart disorders is quite successfully used in an... more The use of graphical methods to determine hidden heart disorders is quite successfully used in analytical systems for Holter monitoring. In this case, the traditional method is the analysis of Poincare Plots, as well as visualization of various components of heart rate variability. Recently, attempts to relate the change in heart rate dynamics (acceleration and deceleration) to the presence of hidden pathologies of the cardiovascular system. Along with traditional methods, much attention is paid to the search and study of parameters that describe the nonlinear dynamics of the processes of heart rhythm formation. Among these characteristics, the degree of asymmetry of the geometrically interpreted parameters of cardiac activity. The asymmetry dynamics can be determined by the parameters of the Poincare Plot. Previously, the authors proposed a method for determining the state of cardiac activity, based on the use of the so-called “Speed Spot” - a geometric interpretation of the functi...
Electrophysiological models of the heart, developed and studied to date, show the presence of man... more Electrophysiological models of the heart, developed and studied to date, show the presence of many discrete events in time, leading to the propagation of electrical activity signals and allowing synchronizing (normally) the work of all parts of the heart. When considering models of heart rhythm management, at least two main levels can be distinguished: intra- and extracardiac. Each of these levels can also be divided into several sublevels. Intracardiac effects that regulate heart rate include the myogenic, intercellular, intracardiac nervous system and the effects of intracardiac humoral factors (produced in the heart itself). Extracardiac effects include neuroreflex and general humoral regulation of cardiac activity. Probabilistic models of the processes of cardiac activity are mainly used to describe heart rate variability at an extracardiac level. At the same time, probabilistic models were practically not used for the processes underlying the automatism of the heart at the intr...
2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS), 2020
Atrial fibrillation (AF) is the most common arrhythmia. Currently, it makes up about 1.5-2% of th... more Atrial fibrillation (AF) is the most common arrhythmia. Currently, it makes up about 1.5-2% of the total population (average age 75-85 years), and it is expected that by 2050 it will be about 30 million people in North America and Europe. This is associated with a five-fold risk of stroke, a triple increase in the risk of heart failure, increased mortality and hospitalization. Currently, methods of non-linear analysis of heart rate variability, which are successfully used in many scientific studies, are becoming more common. In practice, for detecting AF, graphical methods of rhythm analysis are often used: construction of correlation rhythmograms (Poincaré plot), analysis of histograms of RR intervals and three-dimensional scatterogram. They provide visual information on the nature of the heart rhythm, that is, they are visual methods for analyzing the sequence of cardiocycles, and can be used to solve the problem of automatic diagnosis of AF. The article discusses the features of ...
2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON), 2019
The complexity of the ECG signal as an object for modeling has led to a wide variety of proposed ... more The complexity of the ECG signal as an object for modeling has led to a wide variety of proposed mathematical models that allow solving this problem. However, most of the methods are not applicable to simulation. The proposed solution made it possible to obtain the ECG signal generator as a block of the standard library in the Simulink. This generator can be used as a source of simulation signal in the synthesis of models of devices for processing cardiographic signals and evaluating their effectiveness. The developed module can generate both a normal cardio signal and a signal with specified parameters of specific peaks and segments. Generation of an ECG signal for some types of pathologies has shown the adequacy of the synthesized signal to real cardio signals.
A probabilistic model is proposed that explains the regularities of the autocorrelation propertie... more A probabilistic model is proposed that explains the regularities of the autocorrelation properties of the time-localized RR interval is proposed. The model describes the formation of the duration of heart contraction intervals (RR intervals) due to the action of the system of "generation" of global and local random events. The sequence of such events in time is considered as a random doubly connected flow. Let’s represented two classes of random time intervals between the events of such a stream: local and global intervals. Assume that global intervals are random intervals local sum and the sum value is a discrete random variable with a binomial (or Poisson) probability distribution. The relationship between the parameters of the developed probabilistic model and existing models for describing the electrical activity of the heart as a process of propagation of an excitation wave in a complex anisotropic biological medium are showed. Equations for estimating the values of t...
Problems of Innovation and Investment Development
The problem of irregular electricity consumption during 24 hours is considered. In the process of... more The problem of irregular electricity consumption during 24 hours is considered. In the process of production, transmission and consumption of electricity, losses occur. It should be noted that all types of losses, other than losses on transmission lines, are in no way related to the nature of the distribution of electricity among consumers. This circumstance makes the problem of the rational distribution of the total generated electricity actual. Due to the need to store large volumes of electricity in the workplace, storage facilities have been used. As a result, a three-index distribution problem of linear programming with intermediate centers is obtained. The paper suggests some simplification of the obtained problem, which consists in the fact that the formulated distribution problem can be reduced to a set of two sub-problems. The distributive nature of the constraints makes this problem nontrivial. In this connection, the method of reducing distribution subproblems to transpor...
Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies
Предложен метод построения Matlab/Simulink модели генератора электрокардиографического сигнала на... more Предложен метод построения Matlab/Simulink модели генератора электрокардиографического сигнала на основе анализа частотного спектра и формирования соответствующих компонент, реализующих суперпозицию сигналов необходимых гармонических составляющих. Целью работы является синтез такого блока с изменяемыми параметрами, который бы мог использоваться в качестве источника сигнала при имитационном моделировании различных кардиологических систем. В ходе работы были получены решения, позволяющие генерировать кардиографический сигнал наиболее часто встречающихся патологий, моделировать вариабельность сердечного ритма и влияние наиболее распространённых помех. Ключевые слова: имитационное моделирование; Matlab; электрокардиосигнал; дискретное преобразование Фурье; вариабельность сердечного ритма.
2018 IEEE 3rd International Conference on Intelligent Energy and Power Systems (IEPS), 2018
To compensate for power pulsations in the DC power supply network used battery energy storage sys... more To compensate for power pulsations in the DC power supply network used battery energy storage system (BESS) is proposed. To ensure the normal operation of the BESS, it is necessary to use service converters that provide balancing of voltage levels on series-connected storages. The modes of operation of converters of this class are analyzed. The efficiency of the use of capacitive and inductive buffer elements in the structure of active balancing systems is determined. A balancing system with improved characteristics based on transformer topology and a forecasting control system is proposed
IFMBE Proceedings, 2019
Today, one of the main directions in the diagnosis of the heart is the study of long-term registr... more Today, one of the main directions in the diagnosis of the heart is the study of long-term registrations and analysis of statistical data of cardintervals (RR-intervals) and amplitudes of various sections of the ECG. However, the processing of a complete cardiogram in real time and its transfer for analysis using wireless communication lines is quite problematic due to the large data volume and high requirements for the processing power of the processing system. The article proposed the method of using coherence functions for a sequence of RR intervals, which make it possible with high accuracy to determine the onset of atrial fibrillation. This type of heart disease is one of the potentially lethal and its occurs mostly hidden. However, atrial fibrillation increases the risk of stroke by 6–8 times. This method does not require the exchange of large amounts of data and can be used in wearable cardiomonitoring devices.
The subject matter is a mathematical model describing the process of heart rhythm variability, wh... more The subject matter is a mathematical model describing the process of heart rhythm variability, which is based on the use of triangular models of non-stationary random processes in the Hilbert space. The goal of the research is to develop a mathematical model of non-stationary processes of cardiac activity based on a triangular model. This research was the basis for the development of a Matlab model that implements the proposed method for analyzing heart rate variability. Tasks are: to give a description of the variability heart rate as a non-stationary process in Hilbert space in terms of correlation functions; to research the possibility of constructing a correlation and spectral theory of a non-stationary process using triangular models; to synthesize the mathematical model of nonstationary process on the basis of correlation theory for solving mathematical processing and forecasting tasks on the basis of ECG data. Using the proposed mathematical method, we implemented the Matlab ...
Innovative Technologies and Scientific Solutions for Industries, 2019
The subject matter is a mathematical model describing the process of heart rhythm variability, wh... more The subject matter is a mathematical model describing the process of heart rhythm variability, which is based on the use of triangular models of non-stationary random processes in the Hilbert space. The goal of the research is to develop a mathematical model of nonstationary processes of cardiac activity based on a triangular model. This research was the basis for the development of a Matlab model that implements the proposed method for analyzing heart rate variability. Tasks are: to give a description of the variability heart rate as a non-stationary process in Hilbert space in terms of correlation functions; to research the possibility of constructing a correlation and spectral theory of a non-stationary process using triangular models; to synthesize the mathematical model of nonstationary process on the basis of correlation theory for solving mathematical processing and forecasting tasks on the basis of ECG data. Using the proposed mathematical method, we implemented the Matlab m...
2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON), 2019
The article presents the statistical models sensitive to spectral non-stationarity, the identific... more The article presents the statistical models sensitive to spectral non-stationarity, the identification of which in local time intervals represents an independent problem for both continuous and periodically non-stationary processes. This model has been tested for detection of atrial fibrillation based on an analysis of PP intervals during Holter monitoring. The results showed the possibility of increasing the reliability of detection to a value above 0.997.
2019 XXIX International Scientific Symposium "Metrology and Metrology Assurance" (MMA), 2019
Today, one of the most actual problems of cardiology is to obtain comprehensive data in everyday ... more Today, one of the most actual problems of cardiology is to obtain comprehensive data in everyday life to determine current cardiac states, including hidden pathologies, their interpretation and analysis. This article proposes a new method for processing measurements obtained during Holter monitoring and using only the value of the intervals between R peaks of ECG. These peaks have the biggest amplitude and their determination does not present technical difficulties. The improved graphical analysis method proposed by the authors, “Speed Spot”, allows to take into account not only the data of heart rate variability, but also includes an integral characteristic of the rate of change of the variability components. The method was used to determine the type of pathology as atrial fibrillation (AF). To confirm the effectiveness of the proposed method for the detection of arrhythmias, the Atrial Fibrillation Database of www.physionet.org was used, containing records of both normal and arrhy...
The use of graphical methods to determine hidden heart disorders is quite successfully used in an... more The use of graphical methods to determine hidden heart disorders is quite successfully used in analytical systems for Holter monitoring. In this case, the traditional method is the analysis of Poincare Plots, as well as visualization of various components of heart rate variability. Recently, attempts to relate the change in heart rate dynamics (acceleration and deceleration) to the presence of hidden pathologies of the cardiovascular system. Along with traditional methods, much attention is paid to the search and study of parameters that describe the nonlinear dynamics of the processes of heart rhythm formation. Among these characteristics, the degree of asymmetry of the geometrically interpreted parameters of cardiac activity. The asymmetry dynamics can be determined by the parameters of the Poincare Plot. Previously, the authors proposed a method for determining the state of cardiac activity, based on the use of the so-called “Speed Spot” - a geometric interpretation of the functi...
Electrophysiological models of the heart, developed and studied to date, show the presence of man... more Electrophysiological models of the heart, developed and studied to date, show the presence of many discrete events in time, leading to the propagation of electrical activity signals and allowing synchronizing (normally) the work of all parts of the heart. When considering models of heart rhythm management, at least two main levels can be distinguished: intra- and extracardiac. Each of these levels can also be divided into several sublevels. Intracardiac effects that regulate heart rate include the myogenic, intercellular, intracardiac nervous system and the effects of intracardiac humoral factors (produced in the heart itself). Extracardiac effects include neuroreflex and general humoral regulation of cardiac activity. Probabilistic models of the processes of cardiac activity are mainly used to describe heart rate variability at an extracardiac level. At the same time, probabilistic models were practically not used for the processes underlying the automatism of the heart at the intr...
2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS), 2020
Atrial fibrillation (AF) is the most common arrhythmia. Currently, it makes up about 1.5-2% of th... more Atrial fibrillation (AF) is the most common arrhythmia. Currently, it makes up about 1.5-2% of the total population (average age 75-85 years), and it is expected that by 2050 it will be about 30 million people in North America and Europe. This is associated with a five-fold risk of stroke, a triple increase in the risk of heart failure, increased mortality and hospitalization. Currently, methods of non-linear analysis of heart rate variability, which are successfully used in many scientific studies, are becoming more common. In practice, for detecting AF, graphical methods of rhythm analysis are often used: construction of correlation rhythmograms (Poincaré plot), analysis of histograms of RR intervals and three-dimensional scatterogram. They provide visual information on the nature of the heart rhythm, that is, they are visual methods for analyzing the sequence of cardiocycles, and can be used to solve the problem of automatic diagnosis of AF. The article discusses the features of ...
2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON), 2019
The complexity of the ECG signal as an object for modeling has led to a wide variety of proposed ... more The complexity of the ECG signal as an object for modeling has led to a wide variety of proposed mathematical models that allow solving this problem. However, most of the methods are not applicable to simulation. The proposed solution made it possible to obtain the ECG signal generator as a block of the standard library in the Simulink. This generator can be used as a source of simulation signal in the synthesis of models of devices for processing cardiographic signals and evaluating their effectiveness. The developed module can generate both a normal cardio signal and a signal with specified parameters of specific peaks and segments. Generation of an ECG signal for some types of pathologies has shown the adequacy of the synthesized signal to real cardio signals.
A probabilistic model is proposed that explains the regularities of the autocorrelation propertie... more A probabilistic model is proposed that explains the regularities of the autocorrelation properties of the time-localized RR interval is proposed. The model describes the formation of the duration of heart contraction intervals (RR intervals) due to the action of the system of "generation" of global and local random events. The sequence of such events in time is considered as a random doubly connected flow. Let’s represented two classes of random time intervals between the events of such a stream: local and global intervals. Assume that global intervals are random intervals local sum and the sum value is a discrete random variable with a binomial (or Poisson) probability distribution. The relationship between the parameters of the developed probabilistic model and existing models for describing the electrical activity of the heart as a process of propagation of an excitation wave in a complex anisotropic biological medium are showed. Equations for estimating the values of t...
Problems of Innovation and Investment Development
The problem of irregular electricity consumption during 24 hours is considered. In the process of... more The problem of irregular electricity consumption during 24 hours is considered. In the process of production, transmission and consumption of electricity, losses occur. It should be noted that all types of losses, other than losses on transmission lines, are in no way related to the nature of the distribution of electricity among consumers. This circumstance makes the problem of the rational distribution of the total generated electricity actual. Due to the need to store large volumes of electricity in the workplace, storage facilities have been used. As a result, a three-index distribution problem of linear programming with intermediate centers is obtained. The paper suggests some simplification of the obtained problem, which consists in the fact that the formulated distribution problem can be reduced to a set of two sub-problems. The distributive nature of the constraints makes this problem nontrivial. In this connection, the method of reducing distribution subproblems to transpor...
Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies
Предложен метод построения Matlab/Simulink модели генератора электрокардиографического сигнала на... more Предложен метод построения Matlab/Simulink модели генератора электрокардиографического сигнала на основе анализа частотного спектра и формирования соответствующих компонент, реализующих суперпозицию сигналов необходимых гармонических составляющих. Целью работы является синтез такого блока с изменяемыми параметрами, который бы мог использоваться в качестве источника сигнала при имитационном моделировании различных кардиологических систем. В ходе работы были получены решения, позволяющие генерировать кардиографический сигнал наиболее часто встречающихся патологий, моделировать вариабельность сердечного ритма и влияние наиболее распространённых помех. Ключевые слова: имитационное моделирование; Matlab; электрокардиосигнал; дискретное преобразование Фурье; вариабельность сердечного ритма.