Articole din publicaţii internaţionale: Recent submissions

  • Micro-hydropower station for kinetic energy conversion of flowing whater 
    BOSTAN, Ion; DULGHERU, Valeriu; BOSTAN, Viorel; SOCHIREANU, Anatol; CIOBANU, Oleg; CIOBANU, Radu (Institutul de Cercetari pentru Hidraulica si Pneumatica, Bucureşti, 2012)
    An efficient conversion of kinetic energy of river water into mechanical or electrical energy without building barrages is provided by micro-hydropower stations. Increased efficiency is achieved by an optimum position of ...
  • Mechatronics between dream and actual reality 
    IONESCU, Florin; BOSTAN, Ion; DULGHERU, Valeriu; AROTĂRIŢEI, Dragoş; CONSTANTIN, George; KOSTADINOV, Kostadin; STRATULAT, Florin (University "Politehnica" of Bucharest, 2010)
    The paper presents some achievements in complex modelling and simulation in mechatronics, being underlined some characteristics of the mechatronics field together with applications of the mechatronics design principles. ...
  • 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 ...
  • Kinetostatic analysis and optimization of planetary precessional transmissions 
    BOSTAN, Ion; DULGHERU, Valeriu; SOCHIREAN, Anatolie (Technical University of Cluj-Napoca, 2013)
    The paper presents the CAD (Autodesk Inventor) modeling and CAE simulation of precessional drives capable of high transmission ratio and torque for one stage compact construction. The simulations of the drives provide ...
  • Integrated CAE development of precessional drives using autodesk inventor platform 
    BOSTAN, Ion; IONESCU, Florin; DULGHERU, Valeriu; CONSTANTIN, George; SOCHIREAN, Anatolie (Editura Academiei Române, 2006)
    The paper presents the modeling and simulation of precessional drives designed in two variants capable of high transmission ratio and torque for one stage compact construction. The constructions were designed in Inventor ...
  • Helical Turbine for Aeolian Systems and Micro-Hydrostation 
    BOSTAN, I.; DULGHERU, V.; CIUPERCĂ, R. (Springer Nature Switzerland, 2004)
    According to the wind cadastre existing in the Republic of Moldova and the development priorities of the wind energy conversion systems, which recommend the development of small power electric-energetic plants (approximately ...
  • Generation of the teeth precessional gears by plastic deformation 
    BOSTAN, I.; DULGHERU, V.; TRIFAN, N. (IOP Publishing, 2018)
    The paper presents a method for obtaining the teeth of the precessional gear by plastic deformation. There are analyzed the basic problems that must be resolved to apply this process: determination of dimensions of initial ...
  • Elaboration of nonconventional technological methods and equipment for precessional gears manufacturing by means of plastic molding 
    BOSTAN, Ion; DULGHERU, Valeriu; BODNARIUC, Ion (Politehnica Publishing House, 2018)
    The planetary precessional transmissions represent a new principled type of the mechanical transmission. Precessional planetary transmission has a number of advantages: increased bearing capacity, high mechanical efficiency, ...
  • Elaboration and research of planetary precessional multiplier type K-H-V 
    BOSTAN, I.; DULGHERU, V.; CIOBANU, R. (IOP Publishing, 2016)
    The multiplier is an indispensable part of the micro hydropower plant and high power wind turbine. It helps to increase rotor low speeds limited by the water flow small velocity and by the relative big placement diameter ...
  • Development of Planetary Precessional Transmission with Multicouple Gear 
    BOSTAN, Ion; DULGHERU, Valeriu (Springer Nature Switzerland, 2013)
    Some problems of mechanical transmissions can be solved with special effects by developing new types of transmissions based on planetary precessional transmissions with multiple gear, that were developed by the authors. ...
  • Cinetostatic analysis of planetary precessional multiplier 
    BOSTAN, I.; DULGHERU, V.; CIOBANU, R. (IOP Publishing, 2019)
    The majority planetary precessional transmissions diagrams developed previously operate efficiently in reducer’s regime. Teeth profiles have an important role in the efficient transformation of motion in the precessional ...
  • Characteristics of materials and thermal treatments applied to gearwheels obtained by plastic deformation 
    BOSTAN, I.; DULGHERU, V.; TRIFAN, N. (IOP Publishing, 2016)
    A variety of materials are used in the manufacture of gearwheels. These materials satisfy various working conditions for gears. Such gears are made of metallic materials - ferrous, non-ferrous and from plastic materials. ...
  • Aspecte privind elaborarea teoriei angrenajului precesional multiplu şi a tehnologiei moderne de fabricare 
    BOSTAN, Ion; DULGHERU, Valeriu (Asociaţia Generală a Inginerilor din România, AGIR, 2004)
    Studiul ingineresc complex al triadei angrenaj-tehnologie-transmisie a permis elaborarea unui tip nou de transmisie mecanica – transmisia precesională cu angrenaj multiplu, care din punct de vedere tehnologic, poate fi ...
  • Argumentation of the Optimal Hydrodynamic Profile of Blades of the Flow Microhydrostation Rotor’s 
    BOSTAN, Ion; BOSTAN, Viorel; DULGHERU, Valeriu; CIOBANU, Oleg; CIOBANU, Radu; CHIRIŢĂ, Polifron (Institutul de Cercetari pentru Hidraulica si Pneumatica, Bucureşti, 2018)
    Insistent searches of authors have led to the design and licensing of some advanced technical solutions for outflow micro hydroelectric power plants. They are based on the hydrodynamic effect, generated by the hydrodynamic ...
  • Analytical description of precessional nonstandard tooth profile 
    BOSTAN, I.; DULGHERU, V. (Transilvania University Press, Brasov, Romania, 2016)
    The engineering complex study of the triad “gear-technology transmission” has permitted to elaborate a new type of mechanical transmission – planetary precessional transmissions with multicouple gear. In this paper, the ...
  • A helical turbine system for wind and hydraulic energy recovery 
    BOSTAN, Ion; DULGHERU, Valeriu; CIUPERCA, Radu (Universitatea "Constantin Brâncuşi", Târgu-Jiu, 2009)
    The engineering complex study of the triad “gear-technology-transmission” has permitted to The main objective of this work is to elaborate and investigate the conversion devices for non-conventional energies (wind and ...
  • Тонкопленочные солнечные элементы с двусторонней чувствительностью на гетероструктурах (Al, Ga)As 
    АНДРЕЕВ, В. М.; ВИЕРУ, Т. С.; ДОРОГАН, В. В.; ТРОФИМ, В. Г. (Ioffe Institute, RAS, 1989)
    В настоящей работе приводятся результаты исследования тонкопленочных солнечных элементов (ТСЭ) с двусторонней чувствительностью на основе гетероструктур (Al, Ga) As площадью 2 см2.
  • Тонкопленочные солнечные элементы (ТСЭ) на гетеропереходах (Al, Ga)As 
    БРЫНЗАРЬ, В. И.; ДОРОГАН, В. В.; ИВАНОВ, М. Б.; ТРОФИМ, В. Г.; ЧУМАК, В. А.; ЧЕБАН, Л. И. (Ioffe Institute, RAS, 1984)
    В настоящей работе исследованы некоторые свойства ТСЭ рAlxGa1-xAs-nGaAs отделенных от подложек GaAs, и рассмотрены возможности их применения в составе каскадных солнечных элементов (КСЭ) с использованием Si СЭ в качестве ...
  • Liquid-phase epitaxy of AlGaAs heterostructures on profiled substrates 
    ANDREYEV, V. M.; EGOROV, V. V.; SYRBU, A. V.; TROFIM, V. G.; YAKOVLEV, V. P. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 1980)
    A method of fabrication of planar local structures using the selective epitaxial growth of GaAs and AIGaAs layers from liquid phase on profiled GaAs substrates was developed. The planar regrowth of the recesses formed in ...
  • Излучательные свойства эпитаксиальных слоев GaAs, отделенных от подложки 
    ДОРОГАН, В. В.; НЕГРЕСКУЛ, В. В.; ТРОФИМ, В. Г.; ЧУМАК, В. А. (Ioffe Institute, RAS, 1985)
    Задачей настоящей работы являлось исследование излучательных свойств нелегированных и легированных Zn, Sn, Ge и Si слоев GaAs после их отделения о т несущей подложки, а также установление влияния промежуточного слоя ...

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