

Articles
by
N.I. Gorbatenko 
Total Records (
4 ) for
N.I. Gorbatenko 





D.N. Shurygin
,
N.I. Gorbatenko
,
V.V. Grechikhin
and
D.V. Shaykhutdinov


The study considers the problem of geometrization of physicalmechanical properties of rocks of the
coal strata. The solution of the inverse problem of diagnostics of a condition of the geophysical parameters of
the geological space is considered. The approach is proposed for determining the parameters of the regression
equation of physical and mechanical properties on the geophysical parameters defined in the exploratory wells.
Optimization of parameters of mathematical models is based on the solution of the inverse problem of
diagnostics of a condition of the geophysical parameters by the method of fullscale modeling of the
experiment. The regularization criterion takes into account the principles of selforganization of mathematical
models of complex systems. Identification of the parameters of the regression equation carried out on the basis
of algorithm with successive selection of trends (the method of group accounting of arguments). 




G.K. Aleksanyan
,
P.A. Denisov
,
N.I. Gorbatenko
,
I.D. Shcherbakov
and
I.S.D. Al Balushi


A complex nonlinear dependence of the electrical parameters on the injecting current frequency that differs for different tissues, leads to the need of use several mathematical models: three, five and six component. Since, it's impossible to reliably determine exact location of the tissue types boundary in the body before measurement, there is a problem of suitable mathematical models selection in the multifrequency electrical impedance tomography. In order to overcome mentioned difficulties method of biological tissues identification based on naturalmodel approach, applicable for twodimensional and threedimensional multifrequency electrical impedance tomography is proposed. In this case injecting current of different frequencies can be supplied either simultaneously or at different times. It is assumed decomposition mathematical model of a biological object into two levels of simulation: distribution of conductivity, dielectric constant and currents in the area occupied by the object and model of object electrical parameters depending on injecting current frequency. The proposed method allows to select the most adequate model of dependence biological tissues local electrical parameters on injecting current frequency, it would be useful for the automatic identification of tissue located in considerated area. Model selection algorithm is based on the principle of building hypotheses and selection of them as a result of subsequent measurements that most accurately predict the electrical parameters dependence on frequency. The technique involves a measurement for the preselected injecting current frequencies, followed by automatic detection of an additional set of frequencies and additional measures for them. Thus, the scheme of cyclic multifrequency electrical impedance tomography is proposed. At each iteration of the loop are executed sequentially: the injection of current and potential value measurements, reconstruction of the distribution of the electrical parameters, the analysis of parameters dependence on the frequency and the selection of the most adequate model. Reconstruction of the electrical parameters distribution can be performed using known numerical techniques for solving inverse problems of identification. An analysis of the applicability of the stationary and symbolic models currents spreading for the implementation of the proposed approach shows that even in the region of stationary model applicability, it's desirable to use a symbolic model due to the fact that it allows to get information about dielectric constant distribution. 




G.K. Aleksanyan
,
I.D. Shcherbakov
,
A.I. Kucher
and
N.I. Gorbatenko


The study describes the problems of implementation of the method of multibelt electrical impedance
tomography based on the LCard data acquisition system with software developed in the LabVIEW graphical
programming environment. The limitations of associated hardware component as well as steps to eliminate
them also described. As a result, a program for managing the data acquisition and transmission device
for multibelt electrical impedance tomography was developed and allows continuous longterm monitoring. 




G.K. Aleksanyan
,
I.D. Shcherbakov
,
A.I. Kucher
and
N.I. Gorbatenko


The output impedance is one of the most important parameters of the current source in the
composition of the informationmeasuring system of electrical impedance tomography on which the
metrological characteristics of the entire system depend. In this study, a setup was developed for conducting
studies of the output impedance of the current source in a given amplitude range and frequency of the output
current. Studies of the output impedance of the current source were carried out as a result, a characteristic was
obtained, the use of which will further help to improve the design of the device for electrical impedance
tomography. 





