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Gorun P.P.,Lviv Polytechnic | Chabanyuk Y.M.,Lviv State University of Life Safety
Cybernetics and Systems Analysis | Year: 2015

The asymptotic behavior of a modified discrete stochastic optimization procedure (SOP) in a Markov environment in an averaging scheme is investigated. Additional SOP optimization parameters are introduced and are used to investigate the behavior of fluctuations on increasing time intervals. The normalization-dependent form of the limit generator is established, and a modified discrete SOP is shown to be asymptotically normal when the introduced parameters assume certain values. © 2015 Springer Science+Business Media New York

Klym H.,Lviv Polytechnic | Balitska V.,Lviv Institute of Materials | Balitska V.,Lviv State University of Life Safety | Shpotyuk O.,Lviv Institute of Materials | And 2 more authors.
Microelectronics Reliability | Year: 2014

The mathematical models of thermally-induced degradation processes in solids with nano- and microscale topological disordering - bulk and thick-film ceramic composites based on mixed transition-metal manganites are considered. It was shown that degradation transformations in these materials are best described by stretched or suppressed exponential relaxation function. The stretched exponential degradation kinetics is proper to own degradation transformations in such one-type systems as bulk ceramics and multilayered thick-film structures. The mechanism of degradation transformations in one-layered thick films, including two or more different on their origin elementary are described by suppressed exponential kinetics. © 2014 Elsevier Ltd. All right reserved.

Prots'Ko I.,Lviv State University of Life Safety | Teslyuk V.,Lviv Polytechnic
Proceedings of 13th International Conference: The Experience of Designing and Application of CAD Systems in Microelectronics, CADSM 2015 | Year: 2015

The computational structure of discrete sine transform (DST) using convolvers is considered. Hashing arrays on the basis of simplified arguments of basis DST of type II for size N=2n, 3n and computational structure are analyzed, what eliminate the analysis of the identity the cyclic submatrices in the basis matrix of DST-II transforms. © 2015 Lviv Polytechnic National University.

Karbovnyk I.,Ivan Franko National University of Lviv | Borshchyshyn I.,Lviv State University of Life Safety | Vakhula Y.,Lviv Polytechnic | Lutsyuk I.,Lviv Polytechnic | And 2 more authors.
Ceramics International | Year: 2016

The synthesis of forsterite-based ceramic nanopowders using sol-gel method assisted by further thermal treatment has been performed. X-ray diffraction and SEM analysis of the obtained nanopowders are presented. Detailed impedance spectroscopy study of the forsterite nanoceramics doped with Cr3+, Y3+ and Zr4+ ions has been carried out. Impedance spectra are interpreted in terms of equivalent circuits. Peculiarities of the electrical properties for each of the materials under study are discussed. © 2016 Elsevier Ltd and Techna Group S.r.l.

Prots'ko I.,Lviv State University of Life Safety | Rikmas R.,LtdC Uniservice | Teslyuk V.,Lviv Polytechnic
Perspective Technologies and Methods in MEMS Design, MEMSTECH 2015 - Proceedings of 11th International Conference | Year: 2015

The structures of basis matrices for efficient computation discrete cosine transforms (DCT) using cyclic convolutions for size the integer power of prime is considered. The structures of basis matrices of DCT are presented via the hashing arrays. Interconnection of the structures or hashing arrays of DCT for the sizes the integer power of prime are determined, what are simplified the analysis of the basis matrices on the stage of synthesis the fast algorithms. © 2015 Lviv Polytechnic National University.

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