³äá³ð ³ îáðîáêà ³íôîðìàö³¿, ¹ 12
ÀÍÎÒÀÖ²¯
ÒÅÎÐ²ß ÏÎ˲ ÒÀ ÑÈÃÍÀË²Â Ó ÍÅÎÄÍÎвÄÍÈÕ ÑÅÐÅÄÎÂÈÙÀÕ
ÓÄÊ 538.8.029.6
3. Ò. Íàçàð÷óê, Î. ². Îâñÿíí³êîâ, Ò. Ä. Ñåíèê
ÌÎÄÅËÞÂÀÍÍß ÐÅÇÎÍÀÍÑÍÎÃÎ ÐÎÇѲÞÂÀÍÍß Å-ÏÎËßÐÈÇÎÂÀÍί ÅËÅÊÒÐÎÌÀÃͲÒÍί ÕÂÈ˲ ÊÀÑÊÀÄÍÎÞ ÃÐÀÒÊÎÞ
The investigation of TM-polarized electromagnetic wave interaction with a system of screens in a form of a cascaded grating was performed in the paper. The problem was solved in the rigorous formulation in terms of the suggested integration path's modification in the Green function calculation. The obtained numerical results proved the resonance reflection behaviour of the considered structure.
ÓÄÊ 620.179.14
À. ß. Òåòåðêî
ÅËÅÊÒÐÎÌÀÃͲÒÍÅ ÏÎËÅ ÖÈ˲ÍÄÐÈ×ÍÎÃÎ ÂÊËÞ×ÅÍÍß Â ÅËÅÊÒÐÎÏÐβÄÍÎÌÓ Ï²ÂÏÐÎÑÒÎв
The problem of edcly currents defectometry is considered. The solution has been suggested to be represent by means of composition of two problems: a difraction problem and that of wave propagation in a free half-space. The obtained solution is intended for investigation of the structure of defect's fild and to solve the inverse problems to estimate the inclusion parametres.
ÓÄÊ 621.643.002.5
ª. Â. Êðèâ³í, Ä. ª. Êðèâ³í, Î. ª. Ëåâèöüêèé
ÒÎÌÎÃÐÀÔ²×ÍŠ²ÄÍÎÂËÅÍÍß ÐÎÇÏÎIJËÓ ÄÅÔÅÊҲ  OÁ'ªM² ÂÈÐÎÁÓ ÏÐÈ ÅÕÎ-²ÌÏÓËÜÑÍÎÌÓ ÌÅÒÎIJ ÏÐÎÇÂÓ×ÓÂÀÍÍß
An algorithm of 2-D tomography image reconstruction from echo-signal proections by the method adaptive formation of back-proections (AFP) and its application for ultrasonic nondestructive testing and diagnostics has been considered.
ÓÄÊ 620.179.14
Â. I. Ãóòíèê
ÂÈÕÐÎÑÒÐÓÌÎÂÈÉ ÌÅÒÎÄ ÂÈÇÍÀ×ÅÍÍß PAÄlÓÑA ÄÅÔÅÊÒÓ Ó ÂÈÃËßIJ ÖÈ˲ÍÄÐÈ×ÍÎÃÎ ÂÊËÞ×ÅÍÍß
A method of determination of the radius of a defect as a cylindrical inclusion into the conductivity half-space by construction of a nonlinear model based on the known solution of the problem of electromagnetic wave diffraction suggested.
ÓÄÊ 550.388.2
Â. Â. Êîøîâèé, Î. Ë. ²âàíòèøèí
ÂÈßÂËÅÍÍß ÑËÀÁÊÈÕ ÀÊÓÑÒÎ-²ÎÍÎÑÔÅÐÍÈÕ ÇÁÓÐÅÍÜ ÌÅÒÎÄÎÌ ÐÎÇѲÞÂÀÍÍß ÐÀIJÎÕÂÈËÜ ÍÀ ÄвÁÍÎÌÀÑØÒÀÁÍÈÕ ÍÅÎÄÍÎвÄÍÎÑÒßÕ ²Ç ÂÈÊÎÐÈÑÒÀÍÍßÌ ÄÅÊÀÌÅÒÐÎÂÎÃÎ ÐÀIJÎÒÅËÅÑÊÎÏÀ ÓÐÀÍ-3
The investigations results of the small acoustic-ionospheric disturbances caused by the ground based acoustic radiator are presented. Investigations have been carried out by the radio-scattering methods and the radiophysical complex based on the decameter radio telescope URAN-3. It is shown that the characteristics of the scattering ionospheric signal corelate with the characteristics of the acoustic generation.
ÓÄÊ 523.164.4
Â. Â. Êîøîâèé, À. Á. Ëîçèíñüêèé
²ÄÍÎÂËÅÍÍß ÐÀIJÎÇÎÁÐÀÆÅÍÜ ÊÎÑ̲×ÍÈÕ ÐÀIJÎÄÆÅÐÅË ÍÀ ÎÑÍβ ÏÎÇÄÎÂÆÍÜί ÊÎÐÅËßÖ²ÉÍί ÔÓÍÊÖ²¯
A new alternative standpoint to resolve an inverse problem in a decameter extra large base radio interferometry is proposed. It is shown, that the time (longitudinal) cross-correlation function for the two spatial points in a frequency continuum contains an information, that is necessary for the radio image restoration using an aperture synthesis method.
ÌÀÒÅÌÀÒÈ×Ͳ ÌÎÄÅ˲ ÑÈÃÍÀ˲ ÒÀ ÑÈÑÒÅÌ
ÓÄÊ 621.376.56
Þ. Çàëåâñê³, I. Ä. Çåë³íñüêèé, ². Â. Ðîæàíê³âñüêèé
ÂÈÇÍÀ×ÅÍÍß ×ÀÑÒÎÒÈ ÄÈÑÊÐÅÒÈÇÀÖ²¯ ÄÅËÜÒÀ-ÌÎÄÓËßÖ²¯ ÍÀ OCHOBI ÌÀÊÑÈÌÀËÜÍί ÊÐÓÒÎÑÒ² ÂÈÏÀÄÊÎÂÎÃÎ ÑÈÃÍÀËÓ
A method for determining cut-off frequency and discretization steps in delta modulation of stochastic signals is presented in this paper. The method uses maximal steepness and approximation of a complicated spectrum by simple spectra, applying extreme values analysis and first-order polynomials. The proposed method is illustrated by computer simulations.
ÓÄÊ 621.377.2
Â. Î. Ïîãð³áíèé, 3. Äæèö³ìñê³, Þ. Çàëåâñê³, Ï. Êåäðîâñê³
²ÄÒÂÎÐÅÍÍß ÑÈÃÍÀ˲ ²²²ÑËß ÊÎÌÏÐÅѲ¯ 3 ÂÈÊÎ-ÐÈÑÒÀÍÍßÌ ÀÄÀÏÒÈÂÍί ÖÈÔÐÎÂί Ô²ËÜÒÐÀÖ²¯
The general algorithms of data compressing, using extremal analysis and adaptive methods of reproduction signals after such compressing are shown in this paper. Application of the proposed methods to determine errors in time and frequency domain allow to decrease them. The compressing method is illustrated by results of computer simulation.
ÓÄÊ 621.391 : 519.22
I. Ì. ßâîðñüêèé, 3. Çàêæåâñê³
ÊÎÃÅÐÅÍÒÍÈÉ ÊÎÐÅËßÖ²ÉÍÈÉ ÀÍÀ˲3 ÍÅÑÒÀÖ²ÎÍÀÐÍÈÕ ÀÌÏ˲ÒÓÄÍÎ-ÌÎÄÓËÜÎÂÀÍÈÕ ÑÈÃÍÀ˲Â
The formulae for bias and variation of estimates of mean, correlation function and their Fourier components of amplitude-modulated signals are analyzed. The specific features of those characteristics that are important at processing parameter selection are examined. The considerable influence of non-stationary signal characteristics on estimation accuracy are emphasized.
ÓÄÊ 519.24:615.471
Ë. Á. ×îðíà
ÂÈßÂËÅÍÍß ÑÅÐÖÅÂί ÏÀÒÎËÎò¯ ÇÀ ÕÀÐÀÊÒÅÐÈÑÒÈÊÀÌÈ ÌÎÂÍÎÃÎ ÑÈÃÍÀËÓ
The possibility of speech analysis by means of the energy theory of stochastic signals is considered. Applications and results of such analysis for the detection of heart pathology based on voice characteristics with the purpose of medical diagnosis are presented.
ÓÄÊ 621.517
Ò. I. Âàñèëåíêî, Ë. À. Ñèíèöüêèé
ÄÎÑ˲ÄÆÅÍÍß ÀIJÀÁÀÒÈ×ÍÈÕ ²HBAPIAHTIB ÏÐÈ ÄÈÑÊÐÅÒÈÇÀÖ²¯ вÂÍßÍÜ ÊÎÍÑÅÐÂÀÒÈÂÍÈÕ ÑÈÑÒÅÌ
The conservative system with one degree of freedom is considered with the periodi ( and monotone laws of the change of own frequency of oscillations. The change of ai adiabatic invariant with discretisation is investigated. It is shown that the discretisa tion of a linear system by a conservative method with a slow change of own frequen cy does not influence the precision of adiabatic invariant conservation.
ÎÁÐÎÁÊÀ ÂÈ̲ÐÞÂÀËÜÍί ²ÍÔÎÐÌÀÖ²¯
ÓÄÊ 620.179.17
Ï. Ï. Äðàáè÷, À. Ì. Ëîçèíñüêèé
²ÍÔÎÐÌÀÒÈÂͲ ÎÇÍÀÊÈ ÑÈÃÍÀ˲ ÀÊÓÑÒÈ×Íί EMIC²¯ ÒÀ ÀËÃÎÐÈÒÌÈ É ÇÀÑÎÁÈ ¯X ÎÖ²ÍÞÂÀÍÍß
A mathematical model in the form of discrete process set is proposed for acoustic emission signal processing. Difference equation method for such parameter estimation is described and realization example is given.
ÓÄÊ 621.931:519.22
Î. Ï. Äðàáè÷, Ï. Ï. Äðàáè÷, I M. ßâîðñüêèé
ÂËÀÑÒÈÂÎÑÒ² ÊÎÃÅÐÅÍÒÍÈÕ ÎÖ²ÍÎÊ ÏÀÐÀÌÅÒв ÇÀØÓÌËÅÍÎÃÎ ÏÎÒÎÊÓ ²ÌÏÓËÜÑÍÈÕ ÊÎËÈÂÍÈÕ ÑÈÃÍÀ˲Â
The formulae for qualitative indices of coherent parameter estimates of pulse oscillating signal stream observed on the background of stationary noise with given correlation function are deduced and analyzed. The quantitative characteristics for estimates of extremal signal values, their sums, their squares, their square sums are listed. The comparative analysis is given.
ÓÄÊ 681.5.08
Þ. ª. Ïóùàëî, Ï. Ã. Ñòàõ³â
ÌÅÒÎÄ Á²ÆÓ×ÎÃÎ ÊËÀÑÒÅÐÀ ÄËß Ô²ËÜÒÐÀÖ²¯ ØÓÌÓ ÊÂÀÍÒÓÂÀÍÍß ÀÍÀËÎÃÎ-ÖÈÔÐÎÂÈÌ ÏÅÐÅÒÂÎÐÞÂÀ×ÅÌ
The alternate method of small amplitude noise filtration is considered. The method is adopted for computing devices with integer-digital arithmetic.
ÓÄÊ 531.781,2
À. Ì. Ëåíîâåíêî, Â. Ì. Âàñèëþê, ß. Á.Ïîïîâ
ÏÐÎÅÊÒÓÂÀÍÍß ÖÈÔÐÎÂÈÕ ÇÀÑÎÁ²Â ÂÈ̲ÐÞÂÀÍÍß Ç ÍÅ˲ͲÉÍÈÌÈ ÑÅÍÑÎÐÀÌÈ
An original method for linearization of output characteristics of nonlinear sensors is presented. The method is designed for construction of precise measuring devices. An algorithm for circuit parameters optimization is developed.
ÓÄÊ 519.95:621.324:681.3
Ì. Ô. Áîíäàðåíêî, 3. Ä. Êîíîïëÿíêî, Ã. Ã. ×åòâåðèêîâ
ÌÅÒÎÄÈ ÇÀÂÀÄÎÑÒ²ÉÊÎÃÎ k-ÇÍÀ×ÍÎÃÎ ÊÎÄÓÂÀÍÍß ÒÀ ÇÀÕÈÑÒÓ ²ÍÔÎÐÌÀÖ²¯  ÓÊÐÀ¯ÍÎÌÎÂÍÈÕ ²HTEPÔÅÉÑÀÕ ÑÈÑÒÅÌ ØÒÓ×ÍÎÃÎ ²ÍÒÅËÅÊÒÓ
The problems and noise protected methods of multi-valued encoding/decoding and protection of information in original Ukrainian language interface of artificial intelligence systems are described.
ÓÄÊ 541.182.3
Ï. Ì. Ñîïðóíþê, Â. Mipoíîâ³÷, Â. Ä. Ïîãðåáåííèê, ª. Ìðóç, ². Á. ²âaciâ, Î. Î. ×åðâ³íêà, Ë. ª. ×åðâ³íêà
ÐÅÇÓËÜÒÀÒÈ ÑÓ̲ÑÍÈÕ ÂÈÏÐÎÁÓÂÀÍÜ ÏÈËÎÂÈ̲ÐÞÂÀËÜÍÈÕ ÏÐÈËÀIJ ÏÌÏ-1, ÀÄÊÇ-Ì ÒÀ TMdata Ó ÏÈËÎÀÅÐÎÄÈÍÀ̲×ÍÎÌÓ ÑÒÅÍIJ
The results of simultaneous testing of the dust measuring devices PMP-1 arid ADKZ-M with the Hund GmbH's dustmeter TMdata in the dust chamber of Central Mining Institute (Katowice, Poland) are presented and discussed.
ÎÁÐÎÁÊÀ ÇÎÁÐÀÆÅÍÜ ÒÀ Âϲ3ÍÀÂÀÍÍß ÎÁÐÀDzÂ
ÓÄÊ 681.325
Ð. À. Âîðîáåëü
ÌÅÒÎÄÈ ÊÎÂÇÍÎÃΠϲÄÂÈÙÅÍÍß ÊÎÍÒÐÀÑÒÓ ÇÎÁÐÀÆÅÍÜ ÍÀ ÎÑÍβ ÐÎÇÒßÃÓ
The analysis of methods for enhancement contrast of image which used linear stretch, gamma-correction and look up tables is performed. The original approach to design of the methods, moving enhancement image contrast which are based at stretch is proposed.
ÓÄ Ê 681.325
Ð. À. Âîðîáåëü, Í. Â. Îïèð
ϲÄÂÈÙÅÍÍß KOHTPACTHOCT² ÇÀØÓÌËÅÍÈÕ ÇÎÁÐÀÆÅÍÜ
Contrast enhancement method which combines simultaneously noise removal from image and of increase of the contrast is proposed. The procedure is based on the Gordon method and on the adaptive selection of an appropriate inner trimmed mean according to local measurements of the tailbehavior of the noise process.
ÓÄÊ 621.396.965.8
Î. I. Êîâàëü, Ð. ß. Êîñàðåâè÷, Á. Ï. Ðóñèí
ÏÎвÂÍßËÜÍÈÉ ÀÍÀ˲3 ÔÓÍÊÖ²É ÏÅÐÅÄÁÀ×ÅÍÍß ÏÐÈ ÌÀÉÆÅ ÁÅÇÂÒÐÀÒÍ²É ÊÎÌÏÐÅѲ¯ ÊÎÑÌÎ-ÀÅÐÎÔÎÒÎÃÐÀÔ²×ÍÈÕ ÇÎÁÐÀÆÅÍÜ
Comparison results of different predictors implementation for near lossless compression of satellite images is proposed. It is shown how decompression error depends on predictor type and that it is defined by the image.
ÓÄÊ 621.396.965.8
Ð. ß. Êîñàðåâè÷
ÌÅÒÎÄ ÏÎÁÓÄÎÂÈ ÑÈÑÒÅÌÈ ÎÇÍÀÊ ÎÁ'ªÊҲ ÇÀ ÄÎÏÎÌÎÃÎÞ ÏÐÎÑÒÈÕ ÏÎËÞѲÂ
A method of the construction of object feature system based on its boundary approximation is proposed. Simple poles which have an invariance properties to shape translation and rotation are used.
ÓÄÊ 681.3+801.3
ß. I. Ìàêóöüêèé, Â. Ê. Îâñÿê
²ÍÒÅÐÔÅÉÑ ÒÀ ÑÒÐÓÊÒÓÐͲ ÑÕÅÌÈ ÑÈÑÒÅÌÈ ÐÎÇϲÇÍÀÂÀÍÍß ÐÓÊÎÏÈÑÍÎÃÎ ÒÅÊÑÒÓ
In this work is described algoritm of recognation the maximum arcordance between standarting and writting symbols, which in the process of recognation if foreseen a shapeing computer's font.
ÀËÃÎÐÈÒ̲×ÍÅ ÒÀ ÏÐÎÃÐÀÌÌÅ ÇÀÁÅÇÏÅ×ÅÍÍß
ÓÄÊ 519.6
Î. I. Ëàóøíèê, Á. Î. Ïîïîâ
ÀËÃÎÐÈÒÌ ÇÍÀÕÎÄÆÅÍÍß Ð²ÂÍÎ̲ÐÍÎÃÎ ÍÀÁËÈÆÅÍÍß ÔÓÍÊÖ²¯ ÑÏËÀÉÍÎÌ ²Ç ÇÀÄÀÍÎÞ Ê²ËÜʲÑÒÞ ËÀÍÎÊ
The approximation of the function f(x) by Chebyshev spline with given number of links is considered. The algorithm for finding the boundaries of the spline links from the condition of the balanced approximation of the function f(x) on the interval [a, b] is built.
ÓÄÊ 621.382
Ð. À. Ìåëüíèê
ÒÐÈÂÈ̲ÐÍÅ ÏÀÊÓÂÀÍÍß ÃÐÀÔ²Â
ÍÀ OCHOBI ÍÀÊËÀÄÀÍÍß ÌÀÊÐÎÌÎÄÅËÅÉ
The method for packaging of 3-D graphs in the nodes of the space bars is costructecl. Method is based on the crossing of macromodels and uses the optimal reduction of graphs. The algorithms are constructed by considering the onctraints, which are created by crossing macromodels. The problem of space packaging as series of linear placement problems is considered. Different strategies of crossing mac remodelling are proposed.
ÓÄÊ 518.5
ß. Â. Ãàïîíþê
ÇÍÀÕÎÄÆÅÍÍß ÍÀÉÊÐÀÙÈÕ Ð²ÂÍÎ̲ÐÍÈÕ ÌÍÎÃÎ×ËÅÍÍÈÕ ÄÂÎÂÈ̲ÐÍÈÕ ÍÀÁËÈÆÅÍÜ
The paper is devoted to finding the examples of the best uniform Chebyshev polynomial two-dimensional approximations for arbitrary function of two variables using of Axy+Bx+Cy+D expression. The method for optimal parameters finding is built. This method is simple in realization and needs less time for the optimal parameters finding.
ÓÄÊ 519.67
Â. Ï. Êîæàí
ÏÅÐÅÒÂÎÐÅÍÍß ÄÀÍÈÕ Ó ÑÈÑÒÎ˲×ÍÎÌÓ MAKPOKOHBEªPl
The problem of space-time coordination in macropipeline of systolic arrays for solving of complex problems in real time is considered. The methods and algorithms of space time coordination, a general-purpose converter to convert data from any distribution to any other in a subset of the possible data distributions are proposed.
ÓÄÊ 681.3
Á. Ò. Äåðêà÷
ÐÅÀ˲3ÀÖ²ß ÀÑÎÖ²ÀÒÈÂÍÈÕ ÎÁ×ÈÑËÞÂÀËÜÍÈÕ ÑÒÐÓÊÒÓÐ ÍÀ ÎÄÍÎвÄÍÈÕ ÎÁ×ÈÑËÞÂÀËÜÍÈÕ ÑÅÐÅÄÎÂÈÙÀÕ
An approach to synthesis of content addressable memory based on array of homo-graous processors is proposed. Advantages and lacks of some schemes are discussed. Main attention is devoted to consideration of the basic operation - searching data by it coincidence. Advantages and disadvantages of some schemes are discussed.
Ïîíîâëåíî: 10.02.2004