Browsing Colecția instituțională by Title

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  • Invariant conditions of stability of unperturbed motion for differential systems with quadratic nonlinearities in the critical case 
    NEAGU, Natalia; ORLOV, Victor; POPA, Mihail (Institutul de Matematică şi Informatică al AŞM, 2017)
    The center-affine invariant conditions of stability of unperturbed motion governed by differential systems in the plane with quadratic nonlinearities in the critical case were determined.
  • Invariant conditions of stability of unperturbed motion governed by some differential systems in the plane 
    NEAGU, Natalia; ORLOV, Victor; POPA, Mihail (Institutul de Matematică şi Informatică al AŞM, 2017)
    Center-affine invariant conditions of the stability of unperturbed motion were determined for differential systems in the plane with polynomial nonlinearities in non-critical cases and for differential systems in the plane ...
  • Invariant sample-and-hold amplifier to the hold capacitor discharge 
    PENIN, Alexandr; SIDORENKO, Anatolie (Institutul de Inginerie Electronică şi Nanotehnologii "D. Ghiţu", 2021)
    The conventional measurement signal sample-and-hold amplifier comprising a sample and hold circuit in the form of a sample switch, a voltage hold capacitor, and a voltage repeater further includes two similar sample-and-hold ...
  • Invariants of energy characteristics of two-ports with variable loads 
    PENIN, A.; SIDORENKO, A. (Institutul de Inginerie Electronică şi Nanotehnologii "D. Ghiţu", 2019)
    Energy characteristics as the load power and efficiency via the load resistance are the well-known two-valued cubic curves. The consideration of these quadratic fractional expressions as geometric projective transformations ...
  • Invazia cu Stenostomum leucops aquariorum în acvariu cu pești decorativi și metodă de combatere 
    DUMITRIU, Antonina; MELNIC, Sabrina-Emilia (Academia de Ştiinţe a Moldovei, Institutul Ştiinţifico-Practic de Biotehnologii în Zootehnie şi Medicină Veterinară, 2023)
    This study includes data about Stenostomum leucops aquariorum obtained during one month after researching a 45l common aquarium with Pterophyllum scalare black spawn, in which were decorative fishes of different species. ...
  • Inventatori români care au participat la naşterea şi dezvoltarea automobilului 
    CANTEMIR, Lorin; NIŢUCĂ, Costică (Palatul Culturii, 2011)
    It was at the end of the 18th century that the steam engine was invented followed by the attempts to improve it and use it for various types of vehicles. Thus, following the English Thomas Newcomen, who is considered the ...
  • Inventatorii moldoveni la cel de-al 33-lea salon internaţional de invenţii de la Geneva (secvenţe dintr-un jurnal de călătorie) 
    DULGHERU, Valeriu (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova, 2004)
    Pentru a avea succes pe piaţă, o invenţie trebuie să fie cunoscută unui cerc mai larg de potenţiali utilizatori. Breasla inventatorilor din Republica Moldova, cunoscută până nu demult doar în spaţiul sovietic (unde interesele ...
  • Inventions as Promoters of Scientific and Technical Progress 
    BOSTAN, I.; DULGHERU, V. (Springer Nature B. V., 1997)
    The development of society in the XX century brought creativity to the foreground of research. It happened because practically in all fields of activity the social demand for creativity became really urgent. In other words, ...
  • Inverse problem for a two-dimensional strongly degenerate heat equation 
    IVANCHOV, Mykola; VLASOV, Vitaliy (Bons Offices, 2018)
    We consider an inverse problem for a two-dimensional degenerate heat equation in a rectangular domain. Direct problems of this type are mathematical models of various processes such as seawater desalination, movement of ...
  • Invertor reversiv 
    SAINSUS, Iurie; CONEV, Alexei; RUSSEV, Iurie; SIDORENKO, Anatolii (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova (AGEPI), 2019)
    Invenţia reprezintă un dispozitiv funcţional, întrarea căruia este unită la o baterie de acumulatoarea cu tensiunea nominală 12V (borna de întrare “+12V”) ori 24V (bonra de întrare “+24V”). La ieșirea dispozitivului în ...
  • Investigarea atenuatorului optic în baza fluidului magnetoreologic 
    NISTIRIUC, Ana (Tehnica UTM, 2019)
    Sunt prezentate rezultatele elebaorării atenuatorului optic ajustabil (AOA) în baza fluidului magnetoreologic (FMR) destinat pentru funcționarea în gama spectrală 0,4...6 μm. Au fost identificate principalele caracteristici ...
  • Investigarea proprietăţilor termoelectrice și optice ale materialelor nanostructurate și sistemelor moleculare 
    SANDULEAC, Ionel; ANDRONIC, Silvia; OLOINIC, Tatiana; MÎRZAC, Alexandra (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova (AGEPI), 2019)
    S-a propus investigarea proprietăţilor termoelectrice ale cristalelor organice nanostructurate de tip p și de tip n, ca functie de temperatură. Determinarea parametrilor optimi pentru implementarea materialelor date în ...
  • Investigarea ştiinţifică a operelor de artă 
    SANDU, Ion; VASILACHE, Viorica; COLBU, Dumitru-Eugen; IURCOVSCHI, Cosmin Tudor; TANASA, Petru Ovidiu; NEGRU, Ioan Cristinel; SANDU, Andrei-Victor (Tehnica UTM, 2019)
    Conservarea ştiinţifică a operelor de artă ce aparțin patrimoniului național, prin activitățile complexe de cercetăre: investigare ştiinţifică, prezervare activă sau profilactică și restaurare, contribuie la „cunoaşterea ...
  • Investigation of chemical bath deposition of CdO thin films using three different complexing agents 
    KHALLAF, Hani; CHEN, Chia-Ta; CHANG, Liann-Be; LUPAN, Oleg; DUTTA, Aniruddha; HEINRICH, Helge; SHENOUDA, A.; CHOW, Lee (ELSEVIER, 2011)
    Chemical bath deposition of CdO thin films using three different complexing agents, namely ammonia, ethanolamine, and methylamine is investigated. CdSO4 is used as Cd precursor, while H2O2 is used as an oxidation agent. ...
  • Investigation of hole transport in vitreous As2S3 
    ANDRIESH, A. M.; IOVU, M. S.; KOLOMEYKO, E. P.; TSIULYANU, D. I.; SHUTOV, S. D. (Elsevier, 1980)
    The time-of-flight measurements of the hole drift in As2S 3 films have shown that below 80°C the typical dispersive transport occurs. Very low drift mobility values (~10-10cm2/Vs at 45oc) correspond to an activation energy ...
  • Investigation of obtaining vinegar using concentrated juice 
    BOIȘTEAN, Alina ("Vasile Alecsandri" University of Bacau, Romania, 2021)
    Within the framework of this study, the technology of obtaining vinegar from grape and apple concentrates was analyzed in order to unify production. Optimal conditions have been created for alcoholic and acetic fermentation ...
  • Investigation of obtaining vinegar using concentrated juice 
    BOIȘTEAN, Alina ("Alma Mater" Publishing House, Bacau, 2021)
    Within the framework of this study, the technology of obtaining vinegar from grape and apple concentrates was analyzed in order to unify production. Optimal conditions have been created for alcoholic and acetic fermentation ...
  • Investigation of optical properties and electronic transitions in bulk and nano-microribbons of molybdenum trioxide 
    LUPAN, O; TROFIM, V.; CRETU, V.; STAMOV, I.; SYRBU, N. N.; TIGINYANU, I.; MISHRA, Y. K.; ADELUNG, R. (IOP Publishing, 2014)
    In this work, we report on crystalline quality and optical characteristics of molybdenum trioxide (MoO3) bulk and nano-microribbons grown by rapid thermal oxidation (RTO). The developed RTO procedure allows one to synthesize ...
  • Investigation of red-emitting distributed Bragg reflector lasers by means of numerical simulations 
    TRONCIU, Vasile Z.; WENZEL, Hans; RADZIUNAS, Mindaugas; REGGENTIN, Matthias; WIEDMANN, Jörg; KNIGGE, Andrea (The Institution of Engineering and Technology, 2018)
    The authors report theoretical and experimental results on the properties of distributed Bragg reflector semiconductor lasers. Using the traveling wave equation model, they show that a proper choice of coupling coefficient ...
  • Investigation of Steady State Two-Phase Short Circuit Modes Of Phase-Shifting Autotransformer with Hexagon Scheme and with Adjusting Autotransformer 
    BOSNEAGA, V.; SUSLOV, V. (Institutul de Energetică al Universităţii Tehnice a Moldovei, 2023)
    The purpose of work is to investigate two - phase short-circuiting modes of new autotransformer FACT’s - type device and is intended for power systems flexible connection. The developed mathematical model contains the main ...

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