Contents
Automatics and Information Measuring Facilities
- R. Kvietnyy, O. Bunyak
Objects recognition on dynamic background using two-dimensional
prediction model with quadratic nonlinearity
Method of objects recognition on dynamic background is researched in given work. Stochastic, linear and nonlinear prediction models are used for modeling of dynamic background as a signal that is changed in time and space. The best quality of object definition is received with help of simplified nonlinear model as a sum of linear and quadratic signal components. Influences of model order, supporting area size and threshold value on the signal object selection are researched.
- U. Skripnik, T. Kalameyets
Thermonoise method of resistance measurement of highohmic objects
The paper presents the thermonoise anemeter of highresistance objects, in which the influence of temperature of the underresearch object, that can vary within the wide limits is excluded. It also excludes the influence of instability of frequencies of noise voltage’s bar as well as theinfluence of instability of noise voltage’s increasing, that provides the increasing of measuring accuracy of highresistance objects by the level of thermal noises.
- Yu. Krushevskyy, Ya. Boroday
Influence of water mass transfer on accuracy of grain humidity measurement introduction
The authors cite in their thesis the experimental research results of electrophysical grain parameters, on the basis of which the reasons are disclosed which result in the lessening of the precision of the grain humidity measurement with dielectrical drymeters. The authors suggest the ways to increase the precision of measurement of complex permittivity of grain-crops.
- S. Dovgalets, V. Tomkiv, O. Goncharuk, O. Mochulska
Remote surface measurement
There hade been analised the possibility of the application of the gradient fibres for the creation of 3-dimmenssional remote microscope. The structure of microscope and scheme for phase front correction was suggested. There had been conducted the metrological research of the devises' possibilitie, namely the dependence of the objects' under research size on the systems' parameters.
- T. Gryshchuk
Deriviation of characteristic observation of hidden markov model
The process of derivation of voice command characteristic observation on the base of trained hidden markov model. This information can be used for speech recognition process efficiency rising. An idea of estimation function is given, a maximum of which is a characteristic observation. Recommendations for initial approximation selection are given.
- V. Komar, V. Teptya
Complex systems functioning quality analysis by criteria models
The paper presents the method, based upon the combination of the theory of Markov processes and principles of the criteria simulation, which allows to choose the best variant of functioning the underreserach system as for one criteria without the determination of the absolute (numerical) value of the output effect. This method allows also to consider the reliability of the system during the decision making process as for its optimization.
- O. Azarov, V. Garnaga, O. Reshetnyk, S. Bogomolov
The analysis of transmitting feature of push-pull symmetric direct current amplifier
The principles of push-pull symmetric current amplifiers building are considered. Indicated method in spite of using traditional asymmetric structure, suppose presence of push-pull input cascade in form of self-complete circuit with common base, two symmetric intermediate cascades and push-pull symmetric out cascade. The equations for current transmission rate into separate amplifier’s channels of push-pull symmetric constant current amplifiers, total current transmission rate for low signal zone and high signal zone, nonlinearity of transmission rate are deduced. The simplified circuit of symmetric structure constant current amplifier is shown. The fact that circuits of push-pull symmetric constant current amplifiers have smaller error of transmission rate linearity is proved.
- S. Yukhymchuk, D. Bilous
Determination of Maximum Flow in Decentralized Networks
The paper presents the methods and algorithms for determination of maximum flow in decentralized networks, based on the Goldberg – Raî iterative algorithm. There had been given the main assumptions and requirements to the bringing of the maximum flow search task in the decentralized net to the task in the oriented net with the unique source and outflow. To determine the maximum flow there had been suggested the iterated algorithm with the application of binary functions.
- N. Bykov, V. Kovtun, N. Savinova
Reliable method of syllable segments allocation in speech signal
New method which promotes reliability of syllable segments allocation in speech signal is offered, algorithm and device, for realization of the offered method are suggested.
Objects recognition on dynamic background using two-dimensional prediction model with quadratic nonlinearity
Method of objects recognition on dynamic background is researched in given work. Stochastic, linear and nonlinear prediction models are used for modeling of dynamic background as a signal that is changed in time and space. The best quality of object definition is received with help of simplified nonlinear model as a sum of linear and quadratic signal components. Influences of model order, supporting area size and threshold value on the signal object selection are researched.
Thermonoise method of resistance measurement of highohmic objects
The paper presents the thermonoise anemeter of highresistance objects, in which the influence of temperature of the underresearch object, that can vary within the wide limits is excluded. It also excludes the influence of instability of frequencies of noise voltage’s bar as well as theinfluence of instability of noise voltage’s increasing, that provides the increasing of measuring accuracy of highresistance objects by the level of thermal noises.
Influence of water mass transfer on accuracy of grain humidity measurement introduction
The authors cite in their thesis the experimental research results of electrophysical grain parameters, on the basis of which the reasons are disclosed which result in the lessening of the precision of the grain humidity measurement with dielectrical drymeters. The authors suggest the ways to increase the precision of measurement of complex permittivity of grain-crops.
Remote surface measurement
There hade been analised the possibility of the application of the gradient fibres for the creation of 3-dimmenssional remote microscope. The structure of microscope and scheme for phase front correction was suggested. There had been conducted the metrological research of the devises' possibilitie, namely the dependence of the objects' under research size on the systems' parameters.
Deriviation of characteristic observation of hidden markov model
The process of derivation of voice command characteristic observation on the base of trained hidden markov model. This information can be used for speech recognition process efficiency rising. An idea of estimation function is given, a maximum of which is a characteristic observation. Recommendations for initial approximation selection are given.
Complex systems functioning quality analysis by criteria models
The paper presents the method, based upon the combination of the theory of Markov processes and principles of the criteria simulation, which allows to choose the best variant of functioning the underreserach system as for one criteria without the determination of the absolute (numerical) value of the output effect. This method allows also to consider the reliability of the system during the decision making process as for its optimization.
The analysis of transmitting feature of push-pull symmetric direct current amplifier
The principles of push-pull symmetric current amplifiers building are considered. Indicated method in spite of using traditional asymmetric structure, suppose presence of push-pull input cascade in form of self-complete circuit with common base, two symmetric intermediate cascades and push-pull symmetric out cascade. The equations for current transmission rate into separate amplifier’s channels of push-pull symmetric constant current amplifiers, total current transmission rate for low signal zone and high signal zone, nonlinearity of transmission rate are deduced. The simplified circuit of symmetric structure constant current amplifier is shown. The fact that circuits of push-pull symmetric constant current amplifiers have smaller error of transmission rate linearity is proved.
Determination of Maximum Flow in Decentralized Networks
The paper presents the methods and algorithms for determination of maximum flow in decentralized networks, based on the Goldberg – Raî iterative algorithm. There had been given the main assumptions and requirements to the bringing of the maximum flow search task in the decentralized net to the task in the oriented net with the unique source and outflow. To determine the maximum flow there had been suggested the iterated algorithm with the application of binary functions.
Reliable method of syllable segments allocation in speech signal
New method which promotes reliability of syllable segments allocation in speech signal is offered, algorithm and device, for realization of the offered method are suggested.
Civil Engineering
- A. Morgun, A. Nitsevich, I. Måt
Formation of influence matrix of boundary elements method taking into account action of vertical and horizontal stresses
The paper researches the influence of appearance of horizontal movements of the influence of vertical and horizontal loading on the piles and the expediency of the accounting of the numerical computation of radial tension on the value of the pile load-carrying ability.
Formation of influence matrix of boundary elements method taking into account action of vertical and horizontal stresses
The paper researches the influence of appearance of horizontal movements of the influence of vertical and horizontal loading on the piles and the expediency of the accounting of the numerical computation of radial tension on the value of the pile load-carrying ability.
Researching Results Application
- A. Vasyura, T. Martynyuk, L. Kupershtein
Simulation of the neural Network to solve tasks of Symbols Identification
Modeling of the three layer feed forward neural network is executed for symbols identification in context of using this network in the neural part of the fraud management system in telecommunications. Modeling is executed by using MatLAB 6.5 and toolkit Neural Networks Toolbox.
Simulation of the neural Network to solve tasks of Symbols Identification
Modeling of the three layer feed forward neural network is executed for symbols identification in context of using this network in the neural part of the fraud management system in telecommunications. Modeling is executed by using MatLAB 6.5 and toolkit Neural Networks Toolbox.
Energetics and Electrical Engineering
- B. Mokin, M. Chepurnyj, O. Mokin
Research variants of air accumulating power station construction and their substantiation
There had been offered variants of construction of the small air heat-sink power station suitable for research of processes in it. The design procedure of key parameters of this research station is presented.
- M. Moshnoriz
Development of model of the control system by pump station of the second rise
The paper considers the task of efficiency improvement for the controlling over the pumping station due to ensuring the joint operation of the pumps supporting on the output the exact value of pressure or supply. The paper presents the built model of the system controlling the pumping station which allows to provide the joint operation of the pumping aggregates taking into account the ventilator character of loading and quadratic law of frequency management.
Research variants of air accumulating power station construction and their substantiation
There had been offered variants of construction of the small air heat-sink power station suitable for research of processes in it. The design procedure of key parameters of this research station is presented.
Development of model of the control system by pump station of the second rise
The paper considers the task of efficiency improvement for the controlling over the pumping station due to ensuring the joint operation of the pumps supporting on the output the exact value of pressure or supply. The paper presents the built model of the system controlling the pumping station which allows to provide the joint operation of the pumping aggregates taking into account the ventilator character of loading and quadratic law of frequency management.
Informational Technologies and Computer Engineering
- V. Mokin, Y. Kryzhanovskiy, Y. Konovalyuk, D. Kulemin
New approach to the creation of the compatible information-reference subsystem of GIS for environment monitoring
There had been considered the relevant issue of the creation of the uniform information and reference subsystem of the regional information environment monitoring system. There had been suggested the new approach to the creation of such subsystem on the basis of created optimal model. There had been adduced the example of software solution for the given approach for the geoinformation system of Vinnytsia region environment monitoring.
- O. Melnik, O. Slobodyanyuk, S. Kormanovskiy
Creatig of a training module in a distance course "Engineering and Computer Graphics"
A teaching materials structure for the E-learning course of Engineering and Computer Grapfics is proposed. The learning block content and the subject specify is illustrated using an example of a topic entitled Surfaces Cutting by the Planes of a Partial Location. The students knowledge testing methodology is given by the E- Learning Server 3000.
New approach to the creation of the compatible information-reference subsystem of GIS for environment monitoring
There had been considered the relevant issue of the creation of the uniform information and reference subsystem of the regional information environment monitoring system. There had been suggested the new approach to the creation of such subsystem on the basis of created optimal model. There had been adduced the example of software solution for the given approach for the geoinformation system of Vinnytsia region environment monitoring.
Creatig of a training module in a distance course "Engineering and Computer Graphics"
A teaching materials structure for the E-learning course of Engineering and Computer Grapfics is proposed. The learning block content and the subject specify is illustrated using an example of a topic entitled Surfaces Cutting by the Planes of a Partial Location. The students knowledge testing methodology is given by the E- Learning Server 3000.
Machine Building and Transport
- Y. Burennikov, L. Kozlov, S. Repinskyy
About the possibility to reduce hydraulic losses in the control system of hydraulic drive with variable-displacement pump
The paper presents the mathematical model of the automatic regulator for a variable-displacement pump. This regulator provides hybrid control means combining both pump flow rate stabilization and fixed-power mode of pump operation. There had been determined the hydraulic power losses in the suggested system. The possibilities of their reduction have been analyzed in order to eliminate high power losses in the hydraulic drive.
- L. Êîzlov, D. Lozinsky
Research on the influence of the spool working edge slope on the nonlinearities of the proportional directional control valve with electrohydraulic controlling
There had been developed the mathematical model and conducted researches on the characteristics of the proportional directional control valve with electrohydraulic controlling, namely, the dependence of the main spool position on the servo spool displacement, pressure drop across the main spool edge and on the slope angle of the main spool working edge. As a result, the essential nonlinearities of the control system have been exposed both in static and dynamic operation modes. These nonlinearities can be reduced by means of selecting appropriate values for the slope angle of the main spool working edge.
About the possibility to reduce hydraulic losses in the control system of hydraulic drive with variable-displacement pump
The paper presents the mathematical model of the automatic regulator for a variable-displacement pump. This regulator provides hybrid control means combining both pump flow rate stabilization and fixed-power mode of pump operation. There had been determined the hydraulic power losses in the suggested system. The possibilities of their reduction have been analyzed in order to eliminate high power losses in the hydraulic drive.
Research on the influence of the spool working edge slope on the nonlinearities of the proportional directional control valve with electrohydraulic controlling
There had been developed the mathematical model and conducted researches on the characteristics of the proportional directional control valve with electrohydraulic controlling, namely, the dependence of the main spool position on the servo spool displacement, pressure drop across the main spool edge and on the slope angle of the main spool working edge. As a result, the essential nonlinearities of the control system have been exposed both in static and dynamic operation modes. These nonlinearities can be reduced by means of selecting appropriate values for the slope angle of the main spool working edge.
Radioelectronics and Radioelectronic Equipment Designing
- V. Rudyk, S. Gonchar
Compensator of unstationary temporal errors of the wide bar measuring channels wide bar
The questions of approach are considered to determination of unstationary temporal errors, nature of their origin is rotined, the analysis of errors by an analytical method is conducted with the use of models of the measuring channels. Mathematical correlations which can be used for determination of the indicated errors, and also graphs which evidently demonstrate the conduct of such errors at the different values of parameters of channel and signal, are resulted. The algorithm of the signal processing is considered with the purpose of indemnification of unstationary temporal error in the measuring channels wide bar and realization of this algorithm in a vehicle kind.
- O. Semenova
Pulse coding of fuzzy logic values
In this article methods of pulse-frequency, pulse-width and pulse-phase encoding of fuzzy logic values have been proposed. Their difference is that fuzzy logic zero values are encoded not as an absence of pulses, but as pulses with a minimum value of frequency, width or phase. That allows the methods to be used in fuzzy logic elements synthesis.
- Y. Kravchenko, O. Danilenko
Mathematical model of the emission-spectral frequency converter
The paper presents the mathematical model for microelectronic converter of the intensity of optical radiation in frequency. The converter is used for systems of the emission-spectral control for plasmachemical processes. Mathematical simulation of voltage-current characteristic and the conversion function in the form of relation of generation frequency from optical power has been performed.
- A. Vaganov, Yu. Skripnik, A. Yanenko
Research of garments material reflectivity within the range of microwave frequency (SHF)
Much attention has been paid to the behavior of the different materials in the electromagnetic fields of different intensity. The paper presents the further development of researches of the material reflectivity within the super-high-frequency band (SHF) with the use of the highly sensitive radiometric system (RS) and resonance properties of leather materials for making garments. Authors have developed the structural schema of RS researched the peculiarities of its work.
- V. Kychack, N. Kurilova
The research of radio-frequency switches based on inductive transistor negatrons
Mathematical models of the radio-frequency switch on the basis of transistors inductive negatron with use of matrixes of transfer are constructed, active resistance of the switch on frequency of a signal is certain at absence of a signal of management and dependence of dynamic resistance on necessary reduction of factor of transfer is received. Expression for on estimation of the relation of power of a signal of management to power of a target signal in a mode is received.
Compensator of unstationary temporal errors of the wide bar measuring channels wide bar
The questions of approach are considered to determination of unstationary temporal errors, nature of their origin is rotined, the analysis of errors by an analytical method is conducted with the use of models of the measuring channels. Mathematical correlations which can be used for determination of the indicated errors, and also graphs which evidently demonstrate the conduct of such errors at the different values of parameters of channel and signal, are resulted. The algorithm of the signal processing is considered with the purpose of indemnification of unstationary temporal error in the measuring channels wide bar and realization of this algorithm in a vehicle kind.
Pulse coding of fuzzy logic values
In this article methods of pulse-frequency, pulse-width and pulse-phase encoding of fuzzy logic values have been proposed. Their difference is that fuzzy logic zero values are encoded not as an absence of pulses, but as pulses with a minimum value of frequency, width or phase. That allows the methods to be used in fuzzy logic elements synthesis.
Mathematical model of the emission-spectral frequency converter
The paper presents the mathematical model for microelectronic converter of the intensity of optical radiation in frequency. The converter is used for systems of the emission-spectral control for plasmachemical processes. Mathematical simulation of voltage-current characteristic and the conversion function in the form of relation of generation frequency from optical power has been performed.
Research of garments material reflectivity within the range of microwave frequency (SHF)
Much attention has been paid to the behavior of the different materials in the electromagnetic fields of different intensity. The paper presents the further development of researches of the material reflectivity within the super-high-frequency band (SHF) with the use of the highly sensitive radiometric system (RS) and resonance properties of leather materials for making garments. Authors have developed the structural schema of RS researched the peculiarities of its work.
The research of radio-frequency switches based on inductive transistor negatrons
Mathematical models of the radio-frequency switch on the basis of transistors inductive negatron with use of matrixes of transfer are constructed, active resistance of the switch on frequency of a signal is certain at absence of a signal of management and dependence of dynamic resistance on necessary reduction of factor of transfer is received. Expression for on estimation of the relation of power of a signal of management to power of a target signal in a mode is received.