334 articole găsite pentru „Model”.
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Proiectarea si realizarea rapida a calapodului pentru incaltaminte cu ajutorul tehnologiei CAD/CAM
Conf. dr. ing. Aura Mihai, Mariana Pastina, Marta-Catalina Harnagea
In cadrul acestei lucrari se prezinta modul de obtinere a unui produs special adaptat unui consumator, plecindu-se de la cerintele morfo-functionale sau structurale ale piciorului. Trecerea de la dimensiunile piciorului la dimensiunile calapodului presupune o…
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New technologies of precise electrometry
Prof. dr. ing. Michael N. Surdu (Ucraina)
Noua abordare a problemei de crestere a preciziei de masurare a cantitatilor electrice este descrisa. Aceasta abordare se bazeaza pe variatiile de influenta a surselor de incertitudine la rezultatul masurarii. De obicei modelul matematic descrie rezultatul m…
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MODELAREA ȘI SIMULAREA 3D ÎN ANSYS A PISTONULUI DE AER ÎN STAȚIILE DE METROU
Drd. Gabriel TUDOR, Drd. Dragoș Eugen BRÎNZEA
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ASPECTS ON THE DESIGN AND IMPLEMENTATION OF A TRACKED MINI-ROBOT WITH ELECTRIC ACTIONING OBTAINED FROM SOLAR ENERGY CAPTURE
Silviu-Mihai PETRIŞOR, Cosmin-Iulian GRIGORAŞ
The authors of this paper wish to highlight elements regarding the organology, functioning and simulation, in a real workspace, of a tracked mini-robot with electric actioning obtained from solar energy capture with a load of explosives attached a technologic…
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INCREASING SUSTAINABILITY OF THE HOUSING STOCK BY AVOIDING DAMAGE CAUSED BY THE SOIL-STRUCTURE RESONANCE
Dinu BRATOSIN
In any dynamic system, the coincidence between natural period and excitation period (the resonance) lead to extremely large dynamic amplification. For example a linear system with damping of order 25% the dynamic amplification factor has values between d…
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ANALIZA COMPORTĂRII DINAMICE A DISPOZITIVELOR ANTISEISMICE SCHEMATIZATE CA MODELE REOLOGICE COMPLEXE
Polidor BRATU
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DETERMINATION OF THE OPTIMAL MATERIAL FOR PERMANENT MAGNETS USED IN THE MANUFACTURE OF HIGHPOWER AUDIO DEVICES
Constantin D. STĂNESCU, Liliana CĂINICEANU
Crowded permanent magnets of NdFeB -type have the superior properties to those intered as shown by the magnetic circuit modeling using finite element method (FEM). Determination of the optimum material for magnetic circuit of high power audio devices is a com…
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NEARLY ZERO ENERGY BUILDING CONCEPT, ENERGY DESIGN PARADIGM FOR NEW BUILDINGS AND FOR RENOVATING EXISTING BUILDINGS
Dan CONSTANTINESCU, Gabriela CARACAŞ
The paper focuses on the new concept of Nearly Zero Energy Building – NZEB, which should lead, in time, to reducing the fossil energy consumption and to the protection of the natural and built environment. The NZEB concept, as defined by the European Directiv…
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THE EXERGY ANALYSIS OF THE INDUSTRIAL SYSTEMS
Ilie SIMINICEANU
This paper deals with the exergy analysis of a nitric acid plant with ammonia oxidation at normal pressure, and chemical absorption at a pressure of 5 bar (1/5 process).The exergy balance model established previously for open chemical systems, and the corresp…
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ARE THE STATIC POWER CONVERTERS
ENERGY EFFICIENT?
Ion POTÂRNICHE, Cornelia POPESCU, Mina GHEAMALINGA
The power static converters, products used intensively in industrial applications of type as energy conversion, traction, equipment and lifting equipment structure and others, are characterized through two validates abilities in the industrial practice: utili…
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AUTOMOBILUL ELECTRIC – UNA DINTRE SOLUŢIILE MOBILITĂŢII DURABILE
Nicolae VASILE, Gabriela TEODORESCU, Călin OROS,Ioan-Corneliu SĂLIŞTEANU
Deşi utilizarea unor expresii referitoare la economie, care să cuprindă cuvântul „durabil”, există încă din antichitate, sensul actual al noţiunii de „Dezvoltare durabilă” este relativ nou. Conceptul de dezvoltare durabilă înseamnă acel mod de dezvoltare care…
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THEORETICAL RESEARCHES ON THE STRESS STATE AT VIBRO-DRAWING
Octavian BOLOGA
The paper contains the mathematical modelling of the stress state at vibro-drawing for the case of introducing the vibrating motion on axial direction, by means of the punch, into the drawing die. Starting from the definition of the total radial stress as sum…
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EFFICIENT METHOD FOR REDUNDANCY RESOLUTION OF A 7 DOF MANIPULATOR
Mihai CRENGANIS, Octavian BOLOGA
In this paper we are presenting a method to solve the inverse kinematics problem of a redundant manipulator with seven degrees of freedom and a human like workspace based on mathematical equations, Fuzzy Logic implementation and Simulink models. For better vi…
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VECTORIAL PROBABILISTIC MODEL FOR THE UNBALANCE
FACTOR OF A THREE-PHASE ELECTRICAL NETWORK
Lambert Pierrat (Franta)
In a three-phase power electrical network, the voltage asymmetry can be split into two different components. The first component results from the network structure and possesses almost constant value caused by asymmetry of circuit elements (e.g., lines, tra…
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ASUPRA MODELARII RETELELOR DE TRANSPORT INTERMODAL
Sef lucr.dr.ing. Dorinela COSTESCU
In strategiile de dezvoltare durabila, transportul intermodal de marfuri este considerat o solutie pentru echilibrarea pietei transporturilor si ameliorarea efectelor ambientale negative. Problemele tratate in aceasta lucrare se refera la proiectarea unei r…
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PERFORMANCE OPTIMIZATION OF A PVT THAT IS INTEGRATED INTO AN INDUSTRIAL COMPANY
Prof. Eng. Aneta HAZI, PhD, Prof. Eng. Gheorghe HAZI PhD, Lecturer. Eng. Roxana GRIGORE PhD
In lucrare este prezentat un model matematic de optimizare a unui sistem PVT integrat intr-o unitate industriala, in care este folosita continuu caldura obtinuta din sistem. Functia obiectiv a modelului este eficienta energetica globala si eficienta exerget…
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ENERGY MANAGEMENT SYSTEM OF HYBRID MICROGRID WITH ENERGY STOR
MSc. Mousa MARZBAND, MSc, Assoc. Prof. Andreas SUMPER, PhD - Spania, Prof. Mircea CHINDRIS, PhD, Assoc. Prof. Bogdan TOMOIAGA PhD
The economic scheduling of the generation units is playing a significant role in the energy management of the hybrid stand alone microgrid. Energy storage is an increasingly important part of the renewable energy sector because of the need to store power dur…
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Experimental modeling of electrode-tool wear when processing aloed steels through electrical erosion
Groza Ioan
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Computer modelling of movement of meat raw material on pipelines
Litovchenko I.N., Beseda S.D., Taran V.M., Hadjiiski W. M., Stefanov S. V.
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Prezentul si viitorul energiei. Partea I
Prof. dr. ing. Mircea BEJAN, Prof. dr. ing. Tiberiu RUSU, Ing. Ioana BALAN
Numeroase scenarii energetice sunt elaborate in fiecare an de catre organisme specializate in domeniul energiei. Nivelele surselor primare de energie sunt date de rezervele subterane disponibile. Cele mai importante surse de energie primara sunt cele pe baza …