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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 physical-mechanical 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 full-scale modeling of the experiment. The regularization criterion takes into account the principles of self-organization 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 multi-frequency electrical impedance tomography. In order to overcome mentioned difficulties method of biological tissues identification based on natural-model approach, applicable for two-dimensional and three-dimensional multi-frequency 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 pre-selected injecting current frequencies, followed by automatic detection of an additional set of frequencies and additional measures for them. Thus, the scheme of cyclic multi-frequency 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 multi-belt electrical impedance tomography based on the L-Card 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 multi-belt electrical impedance tomography was developed and allows continuous long-term 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 information-measuring 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.
 
 
 
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