Facultatea Electronică şi Telecomunicaţii: Recent submissions

Now showing items 781-800 of 1268

A method for image segmentation based on histograms –preliminary results

RUSU, Mariana; TEODORESCU, Horia-Nicolai L. (Technical University of Moldova, 2012)

We present a novel method of image segmentation. While the method resembles to the known ones based on histograms, it is still different in the use of the gray level distribution and produces results that, in some cases, ...
Метод выбора оптимального решающего правила выборочного контроля

ДОЛГОВ, Алексей Юрьевич (Technical University of Moldova, 2012)

It is developed the method of an estimation of quality control on small size samples for various solving rules taking into account economic losses from likelihood character of control – the factor of checkness, allowing ...
О термоэлектрической эффективности сплавов Bi HSb и легированных Te и Sn

ГЕОРГИЦЭ, А.; КОРОЛЕВСКИЙ, Б. (Technical University of Moldova, 2012)

In this paper are presents efficiency Z in Bi - Sb alloys in the wide range of Bi and Sb content depending on temperature. It is shown that the increase of Sb content, and temperature, from 77K to 300K , thermoelectric ...
Методы повышения точности решающих правил контроля при производстве кристаллов микросхем

ДОЛГОВ, Алексей Юрьевич (Technical University of Moldova, 2012)

Three solving rules operation selective control on small size samples (n=5 and 10), suitable for technological process of manufacture of integrated circuits crystals, allowing to reduce a subjective component of predicted ...
Пропускание фазово-модулированных УКИ лазерного излучения тонкой плёнкой полупроводника в экситонной области спектра и оптический аналог Фешбах–резонанса

ХАДЖИ, П. И.; БЕЛОУСОВ, И. В.; КОРОВАЙ, А. В.; МАРКОВ, Д. А.; КОРОВАЙ, О. В. (Technical University of Moldova, 2012)

A theoretical and numerical analysis of the transmission of phase-modulated laser pulses through a thin film with excitonic nonlinearity is performed. It is shown that, by choosing the modulation law, one can efficiently ...
Об одной особенности связи потенциалов ионизации атомов и гомоядерных молекул

РУСУ, Александру (Technical University of Moldova, 2012)

Based on the reference data on the ionization potentials and affinity of atoms and molecules, we show the high quantum mechanical efficiency of formation of molecules with covalent chemical bonding. The presented calculations ...
Тензоэффект нитевидных кристаллов теллурида свинца в стеклянной изоляции

МЕГЛЕЙ, Д. Ф.; ДЫНТУ, М. П. (Technical University of Moldova, 2012)

In this work, we study the effect of a mechanical deformation on the electric resistance of lead telluride wire crystals. The results of measurement of the strain gage factor for pand n-conduction samples depending on ...
Осцилляции Шубникова-де Газа в монокристаллах Pb0,82Sn0,18Te

МЕГЛЕЙ, Д.; АЛЕКСЕЕВА, С. (Technical University of Moldova, 2012)

Single crystals of lead-tin telluride have been prepared by gas-phase synthesis. Shubnikov-de Haas effects in magnetic fields up to 12 T at low temperatures of 2.1 and 4.2 K have been studied. The parameters of the charge ...
Физический механизм генерации НЧ-шума в полупроводниковых барьерных структурах

ХОЛОМИНА, Т. А. (Technical University of Moldova, 2012)

Results of the theoretical and experimental justification and development of activation-drift model of relaxation processes low-frequency noise generation in physical barrier layers, and also the method of noise spectroscopy ...
Особенности динамики стимулированной рамановской атомно–молекулярной конверсии

ЗИНГАН, А. П.; ХАДЖИ, П. И. (Technical University of Moldova, 2012)

We have obtained the nonlinear equation for the production rate of heteronuclear molecules depending on the initial densities of particles and phase difference. It is shown that the conversion has the periodical and ...
Особенности свойств гетеропереходов на структурных модификациях дифосфида цинка

СТАМОВ, И. Г. (Technical University of Moldova, 2012)

The charge transfer and photoeffect in the heterojunction formed by the epytaxial growing of the one structure modification of the ZnP2 on the other are investigated. It was stated that the transitive processes on the ...
Relaxarea spin electronică în antimonidul de galiu

MIHĂLACHE, Alexei (Technical University of Moldova, 2012)

The present paper deals with the results of the studies of electron spin dynamics in the specimens of the p type conductivity of gallium antimonide doped with iron within the concentration of 0.001ч3 (atomic percent) and ...
Circuite integrate flexibil-rigide – oportunităţi şi probleme

GANGAN, Silvia; ROTARU, Mihail; DUBROVIN, Iurii (Technical University of Moldova, 2012)

The article is devoted to the interesting possibility of implementation of design solutions - flex-rigid multilayer printed circuit boards. The benefits of flex-rigid circuit boards are demonstrated, also the problems in ...
Analiza legii de dispersie a fononilor în cristalul cvasiunidimensional TTT2I3

NICIC, Veaceslav (Technical University of Moldova, 2012)

The paper presents a theoretical study of the crystalline vibration spectrum in the quasi-one-dimensional organic crystal of the Tetratiotetracene-Iodide (TTT2I3). The dynamic matrix and the dispersion equation are obtained ...
Exitonul lui Frenkel în cristale PbGa2S4

PARVAN, V. I.; SYRBU, N. N.; URSAKI, V. V.; ZALAMAI, V.; BEJAN, N. (Technical University of Moldova, 2012)

Pentru cristale PbGa2S4 este calculat conturul spectrelor de reflecţie a excitonii lui Frenkel. Sint identificaţi parametrii excitonului si benzele. Sint calculate valorile despicării cauzate de cimpul cristalin (Δcris) ...
Utilizarea convertoarelor de impedanţă în filtre active

AVRAM, Ion (Technical University of Moldova, 2012)

Active filters have a basic device of electronic communication equipment. In this paper we analyze the cheme of the impedance converter for two variants of realization. It is estimated sensitivity of the input impedance ...
Procesul termic de aliere a straturilor epitaxiale de arseniură de galiu cu comandă automată

BARANOV, S.; COJUHARI, I.; GORCEAC, L.; RADU, P. (Technical University of Moldova, 2012)

The automatic control system for thermal alloying process of GaAs epilayers growth by transport reaction in Ga-AsCl3-H2 system is reported. The control system was built on universal two-channels programmable PID-regulator ...
Particularităţile asamblării BGA-componentelor pe circuite imprimate multistrat

GANGAN, Silvia; ROTARU, Mihail; DIMITRACHE, Pavel; POPESCU, Nicolae (Technical University of Moldova, 2012)

This article presents some peculiarities of assembly of BGA – components on the surface of multilayer printed circuit. Difficulties in the choice of ball terminals and controlling the soldering quality are described. An ...
Metoda simbolică de calculare a caracteristicilor curentului sinusoidal în cursul de electrotehnică universitar

GHEORGHITA, Eugen; LISII, Aliona; KOROLEVSKI, Boris; UNTILA, Pantelei; ZLOTEA, Olga (Technical University of Moldova, 2012)

The symbolic method is largely applied to solve and describe various wave processes. The present paper describes this method in calculating the basic characteristics of sinusoidal current used in teaching Electrotechnics ...
Particularităţile efectelor de transport în antimonidul de galiu dopat cu nichel

GHEORGHIŢĂ, Eugen; KOROLEVSKI, Boris; POSTOLACHI, Igor; GUŢULEAC, Leonid; UNTILĂ, Pantelei (Technical University of Moldova, 2012)

In present paper it is analyzed the changes of the galvanomagnetic effects of gallium antimonide under the influence of the nickel. It shows anisotropy of the transport effects in relation to the orientation of inclusions ...

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