UTM: Recent submissions

  • Mathematical Model of the Alloying Process at The Epitaxial Semiconductor Structure Growth 
    BARANOV, Simion; IZVOREANU, Bartolomeu; GORCEAC, Leonid; GASHIN, Petru; COJUHARI, Irina (Asociatia Generala a Inginerilor din Romania, 2013)
    În această lucrare este prezentat modelul matematic al procesului de aliere cu GaAs a straturilor epitaxiale obţinute în sistemul Ga-AsCl3-H2 cu transport de reacţii. Controlul în sistemul automat se realizează prin ...
  • Estimation of the mathematical model of the DC motor coupled with a reaction wheel 
    MELNIC, Vladimir; COJUHARI, Irina (The Romanian Society of Applied and Industrial Mathematics, 2018)
    In this paper was proposed to estimate the mathematical model of the DC motor coupled with a reaction wheel. It was proposed the experimental curve identification and its approximation with model of object with rst, second ...
  • Educaţia 4.0: evoluţie, provocări şi perspective 
    GOGOI, Elena; ISTRATI, Daniela; COJUHARI, Irina (Universitateai de Stat din Tiraspol, 2021)
    This paper briefly depicts the evolution of education from the Industrial Society till the Digital Age. The development of technology has produced several industrial revolutions which led to radical changes in the modern ...
  • Cultural Heritage Interactive Dissemination through Natural Interaction 
    BRAN, Emanuela; BAUTU, Elena; POPOVICI, Dorin-Mircea; BRAGA, Vasili; COJUHARI, Irina (RoCHI ACM, România, 2019)
    Virtual Heritage is widely used in education, enhancing the learning process by motivation and by providing a natural experience. New ways for the user to explore cultural heritage virtual environments represent dynamic ...
  • Contributions of the controllers tuning in the multiple-loop feed back control system with three contours with inertia 
    COJUHARI, Irina (University of Craiova, 2009)
    A tuning algorithm of linear controllers P, PI, PID in multiple-loop feedback control systems is proposed in this paper. The control objects consist of three subprocesses, which are described by dynamical models with inertia ...
  • Acordarea regulatoarelor în sisteme de reglare în cascadă la modele de obiecte cu elemente identice 
    COJUHARI, Irina (ICI Bucureşti, 2011)
    În lucrare se propune un algoritm de acordare a regulatoarelor tipizate P, PI, PID în sisteme de reglare în cascadă cu două bucle de reglare. Procesul condus se prezintă prin două subprocese cu inerţie. Pentru acordarea ...
  • Biogas – a sustainable energy solution from agro-industrial wastes 
    VLADEI, Natalia; COVACI, Ecaterina (Universitatea Tehnică a Moldovei, 2021)
    In the current global circumstances, a sustainable approach needs to be adopted to ensure successful food production and supply chain. The majority of agro waste are untreated and are disposed-off by burning. Consequently, ...
  • Some aspects of the analysis of functioning NGN network based on semi-Markov processes 
    TSURCANU, D. N.; NISTIRIUK, P. P.; ALEXEI, A. S.; ANDRONIC, S. M.; FINCIUK, S. I.; NISTIRIUK, P. V. (IEEE, 2010)
    The present paper concerns the application of semi-Markov processes to analyze the operation of NGN networks (Next Generation Network).
  • Sunflower oil oxydation into forced thermal processes 
    DRUŢĂ, Raisa; DUCA, Gheorghe; SUBOTIN, Iurie (Universitatea Tehnică a Moldovei, 2021)
    The work investigated the processes that take place during the forced thermal oxidation of sunflower oil. The results obtained in the study showed a major impact of thermo-oxidation (90 ± 2 °C). The supplied air with a ...
  • Application of nanocomposites to grape wastes processing for improve biodiesel production 
    STEGARESCU, Adina; SORAN, Maria-Loredana; LUNG, Ildiko; OPRIŞ, Ocsana; GUŢOIU, Simona; PANĂ, Ovidiu-Ioan (Universitatea Tehnică a Moldovei, 2021)
    Biodiesel production has received a special attention in the recent years due to its advantages in the conservation of the fossil fuels and production is becoming more and more important. Different methods for production ...
  • The possibility and necessity to production of tartaric acid in Republic of Moldova 
    MUSTEAŢĂ, Grigore; BALANUŢĂ, Anatol; SCUTARU, Iurie; COVACI, Ecaterina; SCLIFOS, Aliona; ARHIP, Vasile (Universitatea Tehnică a Moldovei, 2021)
    The wine industry has been and is a source of tartaric acid in wine technology. The main wastes from which are possible to obtain tartaric acid: grape marcs, yeast, vinasa, wine stone, sediments from cold treatment. But ...
  • The influence of biocatalysts on biomass fermentation processes 
    TASCA, Corina; COVACI, Ecaterina; COVALIOV, Olga (Universitatea Tehnică a Moldovei, 2021)
    In recent years, the quantity of agricultural waste has been rising rapidly all over the world. As a result, the environmental problems and negative impacts of agricultural waste are drawn more and more attention. Therefore, ...
  • Influence of preservation procedures on bioactive compounds in sea buckthorn 
    TURCULEȚ, Nadejda; GHENDOV-MOȘANU, Aliona; STURZA, Rodica; MACARI, Artur; SCUTARU, Iurie; POPA, Sergiu (Universitatea Tehnică a Moldovei, 2021)
    Bioactive compounds are of major interest to researchers and the food industry, and sea buckthorn is a natural food ingredient rich in bioactive compounds such as carotenoids, flavonoids, lipids, vitamins, tannins and ...
  • Comparative analysis of coffee decofeinization processes 
    BUCULEI, Amelia; CONSTANTINESCU, Gabriela (Universitatea Tehnică a Moldovei, 2021)
    Caffeine is a natural stimulant found in the leaves, seeds and fruits of many plant species, including coffee beans, tea leaves and cocoa beans. The amount of caffeine in a serving of coffee depends on the type of coffee ...
  • The influence of microwave-assisted extraction parameters on the yield of bioactive compounds in grape marc extracts 
    STURZA, Rodica; PATRAS, Antoanela; LUNG, Ildiko; SORAN, Maria – Loredana; GHENDOV-MOSANU, Aliona (Universitatea Tehnică a Moldovei, 2021)
    The vine (Vitis vinifera L.) is a species of plant from the genus Vitis, family Vitaceae. When processing grapes, grape marc is generated, which consists of skin, seeds and stems. Grape marc is rich in extractable phenolic ...
  • Valorization of greenhouse biomass waste using pyrolysis 
    ION, Violeta Alexandra; PÂRVULESCU, Oana Cristina; MOȚ, Andrei; POPA, Vlad Ioan; CALCAN, Suzana; RĂDUCANU, Cristi; BĂDULESCU, Liliana; GRIGORAȘ, Claudia (Universitatea Tehnică a Moldovei, 2021)
    Pyrolysis can be a promising and relevant technique for valorization of biomass waste obtaining biochar, which can be further used as a soil amender, can enhanced soil carbon sequestration, reduce greenhouse gas emissions ...
  • Physical properties of grape seeds 
    NETREBA, Natalia; BOEȘTEAN, Olga (Universitatea Tehnică a Moldovei, 2021)
    Grape berries, depending on the variety and place of cultivation, contains from 2 to 5% of seeds. After squeezing the juice, the pomace contains up to 25% of the seeds. Grape seeds are a valuable waste of winemaking, ...
  • Depuration of Terbium contaminated water using a liquid membrane supported 
    ELHABIRI, Sid Ahmed; MIRILA, Diana-Carmen; HORTOLOMEU, Andreea; NISTOR, Ileana-Denisa; DIDI, Mohamed Amine (Universitatea Tehnică a Moldovei, 2021)
    Recently new chemical separation techniques have gained increasing interest, and this is confirmed by the large number of contributions that appeared in the scientific literature on this subject during the last two decades. ...
  • Evaluation of Bit Error Rate probability for radio communications and fiber-optic communication systems 
    TSURCANU, D. N.; NISTIRIUK, A. P.; CHIHAI, A. G.; NISTIRIUK, P. P.; BAXAN, L. V.; ANDRONIC, S. M.; NISTIRIUK, P. V.; RUSSU, G. V.; ALEXEI, A. S.; IAZLOVETKII, M. L.; TSURCANU, T. P. (IEEE, 2014)
    The present paper concerns the estimation of BER parameter (Bit Error Rate) for radio systems and FOCS (fiber-optic communication systems), taking into consideration what is known the relationship signal/noise SNR ...
  • The influence of encapsulation on the antioxidant activity of grape marc extract 
    CRISTEA, Elena (Universitatea Tehnică a Moldovei, 2021)
    Publications specializing in food industry analysis report that Europe is currently the fastest growing market for natural food colors. For this reason, most likely in the near future, synthetic additives will be replaced ...