Facultatea Electronică şi Telecomunicaţii: Recent submissions

Now showing items 881-900 of 1268

Parametric exciton–polariton oscillator in a microcavity

KHADZHI, P. I.; VASILIEVA, O. F. (Technical University of Moldova, 2012)

We study the dynamics of parametric oscillations of polaritons in a microcavity that consists of a periodic conversion of a pair of pump polaritons into polaritons of signal and idle modes and vice versa. The period and ...
The analysis of Nb and Cu41Ni59 - alloy thin films by atomic force microscopy

MORARI, R.; AWAWDEH, A.; ZDRAVKOV, V.; MORARI, C.; SIDORENKO, A. (Technical University of Moldova, 2012)

This work is one part of a whole project for elaboration of a superconducting spinswitch. At a certain stage there was the need to develop technologies of magnetron sputtering of mirror-smooth film structures. AFM microscope ...
Temperature influence on In0,3Ga0,7As / GaAs nanostructures of VCSEL lasers with quantum wells

DOROGAN, A.; DOROGAN, V.; MEREUTA, A.; SYRBU, A.; SYRBU, N.; VIERU, T.; URSAKI, V.; ZALAMAI, V. (Technical University of Moldova, 2012)

Transitions hh,lh1-e1(1s), hh1,lh1-e2(1s), hh2,lh2 -e2(1s), hh3,lh3,-e3(1s) and the particularities conditioned by quantum dots (QD) produced on the boundaries of nanolayers and buffer layer had been revealed in reflection ...
Preparation and properties of colloidal GaP nanoparticles

IACOB, M.; RUSU, E.; PYSHKIN, S.; URSAKI, V.; BELEVSCHII, V.; BALLATO, J. (Technical University of Moldova, 2012)

Recent results regarding technological aspect of preparing high quality GaP nanoparticles for use in light emissive devices are presented in this work. The nanoparticles have been prepared by a colloidal low temperature ...
Thermoelectrical properties of nanoscale indium thin oxide-based thin films

BRINZARI, Vladimir; NIKA, Denis; DAMASKIN, Ion; BELYSHEVA, Tatyana; TRAKHTENBERG, Leonid; KOROTCENKOV, Ghenadii (Technical University of Moldova, 2012)

The thermoelectrical properties of indium tin oxide-based nanoscale films deposited by spray pyrolysis method have been investigated. Different metal additives were used to modify the electronic properties of the base ...
The impact of photothermal processing on TiO2 thin films properties

SHISHIYANU, S.; ZARRELLI, M.; STRATAN, Gh.; VARTIC, V.; GIORDANO, M.; SHISHIYANU, T. (Technical University of Moldova, 2012)

In this paper we present our experimental results concerning the fabrication of TiO2 thin films by spray pyrolysis deposition method onto different substrates – Corning glass, Si, SiO2 and optical fibers. The surface ...
Long wavelength VCSEL potential for processing of analog microwave signals

IAKOVLEV, V.; BELKIN, M.; BELKIN, L.; SURUCEANU, G.; MEREUTA, A.; CALIMAN, A.; SIRBU, A.; KAPON, E. (Technical University of Moldova, 2012)

A VCSEL-based optoelectronic frequency conversion process is investigated in details by simulation in modern OE-CAD tools and experimentally. A novel version of a VCSEL based microwave frequency converter is proposed. An ...
The effect of surface functionalization and doping on nanowire devices performances

LUPAN, Oleg; CHOW, Lee; TIGINYANU, Ion; SONTEA, Victor; PAUPORTE, Thierry (Technical University of Moldova, 2012)

The paper deals with an important scientific problem of enhancement performances of nanowire-based devices. Zinc oxide nanowires and nanorods were grown by electrochemical deposition and hydrothermal techniques. X-ray ...
Heteroepitaxy of La0.7Ca0.3MnO3 on MgO-buffered R-Al2O3 substrates

BELENCHUK, A.; KANTSER, V.; MOSHNYAGA, V.; SAPOVAL, O.; ZASAVITSKY, E. (Technical University of Moldova, 2012)

Precisely (100)-oriented La0.67Ca0.33MnO3 films have been grown by aerosol assisted metal-organic chemical vapor deposition technique on a sapphire (R-plane) substrate covered by a MgO(100) buffer layer. The film structure ...
Non-lithographic nanotechnologies for 2D and 3D nanofabrication

TIGINYANU, I. M. (Technical University of Moldova, 2012)

In this paper we present a review of technological approaches for 2D and 3D nanofabrication of semiconductor compounds by using radiation treatment and electrochemistry. Novel spatial nanoarchitectures based on III-V and ...
Применение аппарата полумарковских процессов для анализа функционирования сетей связи NGN

ЦУРКАНУ, Д. Н.; НИСТИРЮК, П. П.; БАКСАН, Л. В.; БЕЖАН, Н. П.; КИХАЙ, А. Г.; ЯЗЛОВЕЦКИ, М. Л.; НИСТИРЮК, А. П.; ФИНЧУК, С. И.; ЦУРКАНУ, Т. П. (Technical University of Moldova, 2012)

The present paper concerns the application of semi-Markov processes to analyze the operation of NGN networks (Next Generation Network).
Combaterea instabilităţii de fază a semnalului digital la recepţie în reţelele de comunicaţii optice

ŢURCANU, D. N.; NISTIRIUC, P. P.; ALEXEI, A. S.; BAXAN, L. V.; NISTIRIUC, A. P.; IAZLOVEŢCHI, M. L.; CHIHAI, A. Gh.; FINCIUC, S. I.; SOROCEANU, Iu. (Technical University of Moldova, 2012)

In this paper is developed a method for improving quality of service QoS (Quality of Service) in optical communication networks through the supperession of physical jitter using a cylindrical lens and reducing of the value ...
Modelele matematice a calităţii reţelelor de comunicaţii multifuncţionale şi serviciilor

ŢURCANU, D. N.; NISTIRIUC, P. P.; ALEXEI, A. S.; BAXAN, L. V.; BEJAN, N. P.; NISTIRIUC, A. P.; IAZLOVEŢCHI, M. L.; FINCIUC, S. I.; CHIHAI, A. Gh.; ŢURCANU, T. P. (Technical University of Moldova, 2012)

In this paper analyzes mathematical models of quality of multiservice networks of comunications and quality of service.
Algoritmi pentru asigurarea funcţionării cu degradare treptată a calculatorului de bord a microsatelitului

SUMAN, Eugen; NICU, Roman; SECRIERU, Nicolae (Tehnica UTM, 2012)

This paper deal with the approaches of reliability problems of microsatellite-board computer. The operation algorithms are proposed for on-board computer based on the principle of gradual degradation.
Algoritmii de comunicare ale unitatilor de comanda ale microsatelitului

CÂRŢÂCA, Alexei; SUMAN, Eugeniu; SECRIERU, Nicolae; NICU, Roman (Tehnica UTM, 2012)

The internal communication of a microsatellite represents the possibility of transmitting and receiving of commands and data by all the subsystems. The performances of the microsatellite’s subsystems differ according to ...
Utilizarea resurselor reutizabile ale limbii române în procesul de recunoaştere a textelor

BOIAN, E.; CIUBOTARU, C.; COJOCARU, S.; COLESNICOV, A.; MALAHOV, L. (Tehnica UTM, 2012)

The paper describes the technology for text digitalization and converting of scanned Romanian texts written with the Cyrillic letters. Full-text digitalization is performed using lexicon Reusable Romanian Linguistic ...
Microsatelitul „Republica Moldova”: cercetarea, proiectarea şi fabricarea componentelor funcţionale

BOSTAN, Ion; CANŢER, Valeriu; SECRIERU, Nicolae; BODEAN, Ghenadie; BLAJA, Valeriu (Tehnica UTM, 2012)

This paper deal with the main rezults of investigation, designing and manufactoring of functional components of microsatellite, obtained in the State investigation program “Valorisation of renewable energy in the Republic ...
Unified matrix representations of architecture of a classical and quantum computers in 2n –dimensional computational Hilbert space H2n.

ENACHI, Viorel; GUBCEAC, Natalia (Tehnica UTM, 2012)

By using 2 n dimensional computational Hilbert space we obtained computers equations for any digital binary computers (or devices ) with n -input and m-output .The solution of computers equations is a transformation matrix ...
Optical correlation processors for high-speed objects recognition and localization

PERJU, Veacheslav; CASASENT, David; YOUNG, Rupert; PERJU, Veacheslav V. (Tehnica UTM, 2012)

In the article there are presented the mathematical and structural descriptions of the basic model of the optical correlation processor, of the processor using the matrixes of the lasers and filters. In order to decrease ...
Quantum computing with Bose operators

GERU, Ion (Tehnica UTM, 2012)

One of the challenges for quantum computers, including the most promising for practical implementations NMR-based quantum computers, at the moment is to increase the number of qubits available for computation. Using the ...

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