Facultatea Electronică şi Telecomunicaţii: Recent submissions

Now showing items 1141-1160 of 1268

Размерные эффекты и осцилляции Шубникова де Гааза в нитях Bi-Sn с однозонной дырочной проводимостью

НИКОЛАЕВА, А. А.; КОНОПКО, Л. А.; ПАРА, Г. И.; БОДЮЛ, П. П.; БОТНАРЬ, О. В. (Tehnica UTM, 2018)

В представленной работе исследовались размерные аномалии в термоэлектрических свойствах нитей Bi, легированных акцепторной примесью олова с однозонной дырочной проводимостью. Монокристаллические нити Bi-0.02ат.%Sn получались ...
Особенности корреляционных свойств шумоподобных сигналов

ШЕСТАКОВА, Т.; СОРОКИН, Г. (Tehnica UTM, 2018)

Тhe paper discusses the basic properties of noise signals, which are used in modern data transmission systems. It is shown, that for obtaining these signals are used pseudo-random sequence with the highest possible base. ...
Transmitter for small-size aircraft based on direct digital carrier modulation

SHESTAKOVA, Т.; SOROKIN, G. (Tehnica UTM, 2018)

The work deals with the principles of construction and structural - circuit solutions of the transmitting device on the basis of direct digital modulation of the carrier oscillation. Structural and schematic diagrams of ...
Сравнительная оценка качественных показателей принятого DVB-T2 сигнала в SFN cети

ЯКОБ, Mихаил; ДEMЧУК, Юрий; АВРАМ, Ион (Tehnica UTM, 2018)

Completed a comparative assessment of the qualitative parameters of DVB-T2 signal in the coverage area of a synchronous network. The analysis is based on the results of field measurements executed in Central zone of digital ...
Estimarea valorilor prognozate al intensității cîmpului în zona de acoperire cu semnal DVB-T2

IACOB, Mihail; DEMCIUC, Iurie; AVRAM, Ion (Tehnica UTM, 2018)

Completed a comparative assessment of the qualitative parameters of DVB-T2 signal in the coverage area of a synchronous network. The analysis is based on the results of field measurements executed in Central zone of digital ...
Laborator de televiziune digitală la UTM

IACOB, Mihail; DEMCIUC, Iurie; AVRAM, Ion (Tehnica UTM, 2018)

The work refers to the activity of the laboratory of digital television, which operates since 2014 in the Technical University of Moldova. Is presented he composition and destination of the equipments used in the educational ...
Studiou de televiziune digitală

BELENIUC, Cristina; URSACHI, Andrian; AVRAM, Ion (Tehnica UTM, 2018)

Television penetrates the various fields of human activity, industry, economics, medicine. Digital video and audio signals and ancillary data-carrying signals together form the digital television signal. In this paper is ...
Impedance characterization of Te based gas sensitive films

TSIULYANU, Dumitru; MOCREAC, Olga (Tehnica UTM, 2018)

Gas sensing performance of Te films investigated by method of impedance spectroscopy is reported and discussed. The films have been prepared by thermal vacuum evaporation onto sintered alumina (Al2O3) substrates with a ...
Traductori capacitivi interdigitali de NO2 bazați pe telurizi sticloși

ȚIULEANU, Dumitru; CIOBANU, Marina (Tehnica UTM, 2018)

Telurizi sticloşi din sistemul cuaternar As2Ge8S3 –Te au fost utilizaţi pentru realizarea traductorilor de gaze capacitivi, operabili la temperatura camerii. Este demonstrat că distribuţia spectrală a capacităţii electrice ...
Influence of rare-earth impurities on optical properties of As2S3 glasses and KCl crystals

TIRON, A. V.; ZALAMAI, V. V.; IOVU, M. S.; SYRBU, N. N. (Tehnica UTM, 2018)

Optical transmission spectra of As2S3 glass-like plates and nanolayers, undoped and doped with Sm2+, Sm3+, Dy3+, Pr3+, and Mn3+ ions have been investigated. The spectral dependences of the refractive index and glass ...
Temperature dependences of the electrical conductivity and thermopower in TTT2I3 crystals

SANDULEAC, Ionel; BALMUS, Ion; CASIAN, Anatolie (Tehnica UTM, 2018)

The temperature dependences of the electrical conductivity and thermopower of the p-type tetrathiotetracene– iodide, TTT2I3 quasi-one-dimensional organic crystals are modeled in order to determine the optimal parameters ...
Proiector LED 41500 LM. Posibilitatea ansamblării în Republica Moldova

RUSU, Nicoleta; SECRIERU, Vitalie; MUNTEANU, Eugen; GORGAN, Dumitru; DOROGAN, Andrei; TINCOVAN, Sergiu (Tehnica UTM, 2018)

In this article are describe an economical projector with an output of 220 W, on the base of LEDS. The list of components, used modules, recent prices on the national and foreign market, opportunities of the light lamps ...
Manifestare neaşteptată concomitentă a supraconductibilităţii şi feromagnetismului slab la interfeţele bicristalelor de Bi şi a izolatorilor topologici tridimensionali BiSb

MUNTYANU, F. M.; CHISTOL, V.; CONDREA, E. P. (Tehnica UTM, 2018)

Two/one superconducting phases with the onset of transition ≤ 36K are observed at CIs of bicrystals, while the rhombohedral Bi and 3D topological insulator (3DTI) BiSb are diamagnetic and do not exhibit superconductivity. ...
Efectele co-dopării și tratamentului de lungă durată asupra proprietăților peliculelor din oxid de cupru

ABABII, N.; MAGARIU, N.; ȘONTEA, V.; TROFIM, V.; CREŢU, V.; RAILEAN, S.; LUPAN, O. (Tehnica UTM, 2018)

Nanostructured films of copper oxide co-doped with Ag and Ni were deposited by synthesis from aqueous chemical solutions SCS. Effects of rapid and long term thermal treatments on morphological and structural properties has ...
Birefringence in ZnIn2S4 layered crystals

ZALAMAI, V. V.; TIRON, A. V.; RUSU, E. V.; SYRBU, N. N. (Tehnica UTM, 2018)

Interference spectra of ZnIn2S4 crystals by 7.5 - 900 μm thicknesses were investigated. Spectral dependences of refractive indices (no and ne) were calculated and they intersection was observed at energy E0 ~ 2.8 eV. The ...
Numerical and experimental studies of a distributed Bragg reflector laser

TRONCIU, V. Z.; RADZIUNAS, M.; WENZEL, H.; KNIGGE, A.; REGGENTIN, M.; WIEDMANN, J. (Tehnica UTM, 2018)

We report in this paper theoretical and experimental results on the dynamical properties of a distributed Bragg reflector (DBR) semiconductor lasers. Using the traveling wave equation model, we show that a proper choice ...
Impedance meter in Cartesian coordinates

NICOLAEV, Pavel (Tehnica UTM, 2018)

The paper is dedicated to the problems of automatic measurement of the impedance components in Cartesian coordinates. In paper is presented the structure and the operating principle of the impedance meter with simulated ...
Peierls transition in organic crystals of TTT2I3 for different values of carrier concentration

ANDRONIC, Silvia; BALMUS, Ion; CASIAN, Anatolie (Tehnica UTM, 2018)

Peierls transition in quasi-one-dimensional organic crystals of tetrathiotetracene-iodide, TTT2I3, is investigated in 3D approximation. For a more complete description of the crystal model, two the most important hole-phonon ...
Optical anisotropy in optoelectronics

DOROGAN, A. V. (Tehnica UTM, 2018)

In the paper is presented an overview on the optical anisotropy of ZnP2, CdCa2S4 crystals manifested by strong gyration effects, birefringence, dichroism, rotation of the polarization plane, etc. These effects can be used ...
Reprezentarea eficientă a sursei de date în reţeaua de comunicaţii

NISTIRIUC, Ana; ABABII, Victor; CHIHAI, Andrei; ŢURCANU, Dinu; BEJAN, Nicolae; ALEXEI, Anatol; NISTIRIUC, Ion; SHARMA POPOVICI, Natalia; NISTIRIUC, Pavel V. (Tehnica UTM, 2018)

This paper analyzes the approach of using Kruskal's algorithm to determine the minimum tree that contains the graph network communications.

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