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³ , 16(92), 2002


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538.3:550.372:620.1:621.6
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The distribution of electric field and current density, that leakage from cylinder, placed into half-space in parallel to his bounder are considered. The measuring mistakes of transversal effort on ground surfaces and potentials differences pipe-earth attached to inspections of underground pipelines are analysed. Been accorded ground resistance determination algorithm.

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621.317.337
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The obtained results of determination of underground pipeline insulation transparent damages dimensions with the help of attenuation coefficient of currents in separate sections are presented. It is shown that measurement of pipeline current with the error no more than 0.5 % is sufficient for certain determination of damage dimensions.

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Application of two-frequency compensation method in the problems of factor's separate control in the case of noise's influence depression, useful signal's multiplication at small "signal / noise" corellation and at simultaneous noise and the controlled signal variation is considered.

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620.179.14
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The mathematical model of the transfer function of the eddy current probe - nonferrous plate system construction is proposed. On this basis the solution of inverse problem of selective measurement of the plate conductivity, thickness and coating thickness with a small error is obtained.

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681.513
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The algorithm of numerical modeling of the decametric space radio emission propagation through the Earth ionosphere containing TID-like large scale electron density inhomogeneities was proposed and elaborated. In the algorithm an approach of geometry optics and step-by-step trajectory and propagated wave parameters estimation had been applied.

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621.382.019
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в In this work the influence of contact defects in a bipolar transistor on low frequency noise parameters of an amplifier, modeled by the canonical equivalent noise scheme, is considered. Appearance of essential changes of correlation connection between the equivalent noise sources of the canonical model is shown.

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538.8.029.6
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The problem of electromagnetic plane wave diffraction by multielement grating imbedded in a half-space is considered in the case of TM-polarization. A system of linear algebraic equations is derived by satisfying the necessary boundary conditions, application of the specially constructed quadrature formulae and an appropriate Green function calculation. Numerical results describing the resonance characteristics of the cascaded grating are presented in the paper.

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519.853
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The local statistical optimisation based on Rastrigin's conus method is considered. Criteria and algorithms of adaptation of search parameters are proposed. Some examples are considered.

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681.513:519.6
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The task of linear parametrical estimating in conditions of the bounded errors is considered. The limitations of existing computing methods of this task solving are shown. A new methods principles are elaborated on the basis of the analysis.

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621.77(088.8)
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The simplest models of periodically correlated random process and bi- periodically correlated random process are considered. The quality of mean estimation obtained by component method and the least squares method is in the paper.

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531.8+62-50
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This paper deals with the optimal control problem of three-link anthropomorphic manipulator. The problem of approximation of the obtained optimal control torques by the moment of forces, exerted by the spring-damper-like drives is studied.

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518.5+ 550.832
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The method of parameters obtaining of best Chcbyshev weight approximation by sum of polynomial and generalized exponential function is built. On the base of such approximations the models of constructive steel magnetize curve and dependence of magnetic pole from tension were obtained.

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539.2:537.222:536.7
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The article contains the theoretical investigations of mechanical and electrical phenomena in defor-mable solid surface of metal Pb in the thermperature gebits T= [300 K; 0], T= [415 K; 600,5 K]. The calculations include three approximations.

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621.317.337
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The mathematical expressions for definition of the install depth of underground long current-conducting communications and the amplitude value of the current flowing on them by parameters of electromagnetic field radiated of them. For realization of listed expressions, the structure of electric signals registered on the ground surface and the recurrent algorithms of the averaging computing transformer synthesis are described.

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621.317.3/4
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The article contains the describing of the new tipe of quasiconstant electrical field indicators, clearances of 1 mm are included between the working hydroswitch surfases. This increases reliability of indicator and decreases the hydroswitch supply power, makes the construction and producing technolody easier.

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621.325
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A number of new approaches to image enhancement which are based on transformation in the local contrast domain and use of equalization, unsharp masking, rank transformation and nonlinear stretching of local contrast are proposed and proved.

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551.568.85
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The proposed algorithm is developed for object localization and segmentation of low contrast images. It is based on piecewise-linear model of image intensity and mathematical morphology for modeling of local image objects.

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681.142.4
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Some known fingerprint image distortions are described. A fingerprint image enhancement algorithm and some methods, which are using for pre-processing, are given. Finally we representing the result after using proposed algorithm.

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621.391
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A method for detecting singular core points of fingerprint based on Poincare index calculating from directional field points is presented. Using information related to each candidate, real core point is detected from a sophisticated logic.

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532.61: 681.327.12.001.33
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Software design questions of automated opto-electronic system for control and measuring of the material's capillary characteristics by the sessile drop method are considered. Utilization possibility and efficiency of a simple scale transforms for cut noise and edge detection problem's solution on the image preprocessing are shown.

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621.325
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System is intended for image processing the low contrast images and it is useful for designing new image processing methods. Some operations on images are provided. New proposed image processing methods, and known methods are designed. Also determination the methods of effectiveness are proposed. The numerical contrast coefficient of image for image processing efficiency is used in system. System can be used in many applications.

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681.7:621.391
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The evaluation of instrumental error for measuring of distances between correlation peaks in the first diffraction order of the optical digital device for identification of transformed phase masks is carried out.

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518.5
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Iterative formula for findind knots of balanced approximation by Chebyshev spline is proposed. Sufficient conditions of iterative procedure convergernce are derived.

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518.5:681.3
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The outher's developed tools of the programming, paralleling, adjusting of the matrix multiprocessors systems and algorithmes of the chebeshov's spline-approximation are discusts. The conclusion about the efficiency of the such approches for syntheses matrix spline calculators are done.

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621.317:681.325
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Is considered uniform Chebyshev's an approximation by nonlinear function. For this function the absolute and relative error is defined, the algorithm of a detennination of parameters of function is composed.

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621.391
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Features of the complex theoretic-number transforms (CTNT) according to calculation of the digital convolutions have been considered. Lengths of digital sequences what allowing effective high-speed transformation algorithms and Algorithm for effective search of the CTNT's roots were obtained.

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681.3
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An approach to realization of information analytical system for handling video data is presented. Database of images of materials is described. Such database is an integral part of expert analytical system for recognition and analysis of space-time structure of materials.

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: 10.02.2004