Browsing Articole ştiinţifice by Title

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  • Mathematical composite models, a path to solve research complex problems 
    OANTA, Emil; PANAIT, Cornel; MARINA, Vasile; MARINA, Viorica; LEPADATU, Leonard; CONSTANTINESCU, Eliodor; BARHALESCU, Mihaela Luminita; SABAU, Adrian; DUMITRACHE, Constantin Luois (DAAAM International, 2011)
    The paper presents original ideas regarding the actual research methods which must rely on advanced concepts and intelligent integrated instruments. Starting from the prior work which was perceived, analyzed and synthesized, ...
  • Mathematical Model for Diamond-Type Crystals with Impurities or Defects 
    OPRIŞ, D.; ALBU, I. D. (Politehnica University of Bucharest, 1998)
    This work develops the geometry and dynamics of diamond-type crystals with impurities or defects and symmetry from the perspective of Langrangian mechanics. We begin by formulating continuous–discret Lagnge-d`Alembert ...
  • 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 ...
  • Mathematical modeling of the multipair convex-concave teeth contact in precessional gearing 
    BOSTAN, Viorel; BOSTAN, Ion; VACULENCO, Maxim (Universitatea de Stat din Tiraspol, 2020)
    The paper addresses the problems of creating toothed gears ADCX-CV for 2K – H precessional transmissions, with convex-concave contact KCX-CV with the small difference in the curves of the flanks of the multiple pair ...
  • Mathematical models of the input signals in an adaptive telemetering system 
    VLADOV, M.; KANTSER, V. (Institutul de Inginerie Electronică şi Nanotehnologii "D. Ghiţu" al AŞM, 2009)
    Some mathematical models of the input signals in an adaptive telemetring system are developed for the purpose of the redundancy reduction of the measuring data or the “volume information reduction”, i.e., for the construction ...
  • Max-Erlang and Min-Erlang power series distributions as two new families of lifetime distribution 
    LEAHU, Alexei; MUNTEANU, Bogdan Gheorghe; CATARANCIUC, Sergiu (Institutul de Matematică şi Informatică al AŞM, 2014)
    The distribution of the minimum and maximum of a random number of independent, identically Erlang distributed random variables are studied. Some particular cases of such kind of lifetime distributions are discussed too.
  • Maximizing a neural network's accuracy and boosting the learning process for detecting the absolute colour similarity based on the centroids of normal distributions 
    SCROB, Sergiu; LISNIC, Inga; LEAHU, Alexei (Universitatea de Stat din Moldova, 2021)
    Our aim is to demonstrate that the ANN is prone to converge faster and with a higher level of accuracy using training data where tuples of triplets also represents the centroids of those 12 colour classes, considering each ...
  • Maximum Inaccuracies of Second Order 
    KOLIKOV, Kiril; EPITROPOV, Yordan; CORLAT, Andrei; KRASTEV, Georgi (Institutul de Matematică şi Informatică, AŞM, 2015)
    Let an indirectly measurable variable Y be represented as a function of finite number of directly measurable variables X1, X2, ..., Xn. We introduce maximum absolute and relative inaccuracies of second order of Y – this ...
  • Maximum values of frozen soil’s depth and hoar frost’s thickness estimated on the basis of extreme values theory 
    NEDEALCOV, Maria; RĂILEANU, Valentin; CROITORU, Gheorghe; COJOCARI, Rodica; CRIVOVA, Olga (Institutul de Ecologie şi Geografie, 2018)
    Extreme climatic phenomena present risk factors for agriculture, health, constructions, etc. and are studied profoundly these past years using extreme value theory. Several relation that describe positive extreme values’ ...
  • Măsura valorii ştiinţifice. Membrul corespondent al AŞM Sergiu Dimitrachi la 80 de ani 
    NASTAS, Vitalie (Academia de Științe a Moldovei, 2013)
    Născut la 7 martie 1933, în s. Unţeşti, azi r-nul Ungheni. Inginer, domeniul ştiinţific: radioelectronică şi telecomunicaţii. Doctor habilitat în ştiinţe tehnice (1988), profesor universitar (1991). Membru corespondent al ...
  • Măsurarea vizibilității producției științifice a Universității de Stat din Moldova: analiză bibliometrică și altmetrică 
    ŢURCAN, Nelly; CUJBA, Rodica (Universitatea de Stat din Moldova, 2019)
    Etapa modernă de dezvoltare socială se caracterizează prin trecerea la o nouă formă de dezvoltare a societății, în care cunoașterea devine atât o valoare importantă economică, cât și o resursă strategică. Prin urmare, în ...
  • MD-GRID certification authority 
    POCOTILENCO, Valentin; SIDORENCO, Veaceslav; ALTUHOV, Alexei; BOGATENCOV, Petru (Departamentul Editorial-Poligrafic al ASEM, 2009)
    Certificate Authority is a trusted network entity, responsible for managing X509 digital certificates and is a trusted entity that validates the identity of the holder of a digital certificate. Paper describes the ...
  • Means of enhancing the role of biological nitrogen in phytotechny 
    COȘCODAN, M.; TODIRAȘ, V.; PRISACARI, S.; LUNGU, A. (Moldova State University, 2022)
    According to several sources, biological nitrogen plays an important role in the growth, development and productivity of agricultural plants. It is also known that with increasing doses of mineral fertilizers their ...
  • Measurement of a Conductor Cross Sectional Area 
    DIMITRAKI, N. S.; DIMITRAKI, S. N. (Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Republic of Moldova, 2008)
    An electrical method of indirect measurement of the cross sectional area of a conductor covered by a dielectric covering at casting in a suspended state is considered. The description of the method, the structural and ...
  • Measuring the contact surface of oak chips / wine by image analysis 
    CHICIUC, Igor; CHICIUC, Andrei (International Measurement Confederation, IMEKO, 2016)
    The study is focused on measuring the oak chips/wine contact surface. Three samples were analyzed with the doses used in oenology (2; 3; 4; 5 g.L-1). For example, for the dose of 2 g.L-1 there were obtained the surfaces, ...
  • Measuring the Resistance of Resistors in the Winding Process with Insulated Wire 
    DIMITRACHI, N. S.; DIMITRACHI, S. N. (Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Republic of Moldova, 2010)
    A method for measuring the resistance of resistors and dividers in the process of their winding using an insulated wire, along with their resistance distribution onto a frame according to a preset law, is proposed. The ...
  • Mecanismele Perpetuum Mobile – realitate sau idealizare 
    DULGHERU, Valeriu (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova, 2001)
    Întotdeauna a existat dorinţa firească a inventatorilor de a obţine ceva din nimic, dorinţă, care se mai întâlneşte şi astăzi în lumea aceasta extrem de bogată a ştiinţei în care sunt bine stabilite şi verificate legile ...
  • Mechanical behavior at point contact of CdGa2S4 and CdGa2Se4 
    PYRTSAC, C.; SHIKIMAKA, O.; GRABCO, D.; PRISACARU, A.; PARVAN, V.; URSAKI, V. (Academia de Ştiinţe a Moldovei, 2014)
    In this study the deformation peculiarities of CdGa2S4 and CdGa2Se4 subjected to point contact (indentation) were investigated. By applying a depth-sensing nanoindentation technique with Berkovich pyramidal diamond indenter, ...
  • Mechanical properties and Raman scattering investigation under indentation of CdGa2S4 and CdGa2Se4 
    SHIKIMAKA, O.; BURLACU, A.; GRABCO, D.; PARVAN, V.; PYRTSAC, C.; URSAKI, V. (IOP Publishing, 2016)
    The behavior of CdGa2S4 and CdGa2Se4 single crystalline semiconductors under Berkovich indentation of the (1 1 2) face in the load range of 10–700 mN has been investigated. Values of hardness and Young’s modulus have been ...
  • Mechanical properties of one-dimensional coordination polymer [Cu(adi)(4-pyao)2]n 
    CROITOR, L.; COROPCEANU, E. B.; GRABCO, D. Z.; PYRTSAC, C.; FONARI, M. S. (Institutul de Fizică Aplicată al AŞM, 2014)
    Blue block crystals of title compound, [Cu(adi)(4-pyao)2]n 1 were obtained by blending the solution of copper (II) fluoride with 4-pyridine-aldoxime (4-pyao) and adipic acid (H2adi). X-ray single crystal structure analysis ...

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