463 articole găsite pentru „aria”.
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RESEARCH ON THE QUALITY YIELD OF HERBAL MINT (Mentha piperita L.) UNDER THE INFLUENCE OF MINERAL AND ORGANIC FERTILIZATION IN CLIMATE CONDITIONS IN S.C.D.A. LOVRIN
Drd. ing. Ovidiu PATRUI, Prof. dr. ing. Valeriu TABARA
Avand in vedere faptul ca fertilizarea este una din masurile care, aplicate corespunzator, duce la cresterea productiei si implicit a calitatii acesteia, multe cercetari efectuate in ultimul timp s-au axat pe gasirea unor formule optime pentru aceasta. Lucrar…
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PROBLEME DE PROTECTIE AMBIENTALA LA SUDAREA CU SARMA TUBULARA
Prof. assoc. dr. ing. Mihaela POPESCU, Dr. ing. Radu Alexandru ROSU
Problema asigurarii protectiei ambientale la sudarea cu sarma tubulara este de stricta actualitate. Se face referire la compozitia sarmei tubulare, cu trimiteri clare la prevederile Documentelor Institutului International de Sudura, IIS/IIW dar si la necesita…
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OPTIMIZAREA PERFORMANTELOR EDUCATIONALE PRIN MODELAREA SIMULATIVA A FLUXULUI DE PERSONAL, LA NIVELUL MICROSOCIAL AL UNEI FACULTATI
Dr. ec. Ramona Camelia PAUNESCU
Articolul isi propune sa aduca in atentia specialistilor necesitatea redefinirii unor concepte si introducerea unor concepte noi, astfel incat sa se asigure o intelegere clara, coerenta si interdisciplinara a oricarei organizatii ca sistem natural cu autoregl…
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O abordare moderna pentru producerea eficienta a biodieselului
Nicolae Sdrula, Ioan Frasineanu
Uniunea Europeana este puternic dependenta in prezent de combustibilii fosili pentru nevoile crescinde de transport. Biocombustibilii pot oferi o alternativa importanta la cei fosili pe termen scurt si mediu. Dintre acestia, biodieselul este un combustibil ce…
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STABILIREA PARAMETRILOR SPECIFICI MĂSURĂRII ARMONICE A ELEMENTELOR GEOMETRICE ALE ANGRENAJELOR EVOLVENTICE PRIN SIMULARE NUMERICĂ
Drd. ing. Dănuț Iulian STANCIU, Dr. ing. prof. univ. Gh. GHEORGHE, Dr. ing. Daniela CIOBOATA
Măsurarea armonică a parametrilor geometrici a angrenajelor cu profil evolventic este o metodă mult mai rapidă decât metodele tradiţionale de verificare, cu o precizie suficient de mare să poată fi aplicată cu succes în industria producătoare de roţi dinţate …
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PROIECTAREA ECHIPAMENTELOR SUB PRESIUNE CU CONSIDERAREA DETERIORĂRII PRODUSĂ DE FISURI
Valeriu V. JINESCU1,Vali-Ifigenia IORDĂCHESCU (NICOLOF)
Din procesul de fabricare rezultă microfisuri şi defecte în echipamentele sub presiune (EP). În prezent proiectarea echipamentelor sub presiune constă în: - proiectarea EP fără fisuri pe baza metodei analitice sau/şi a metodei cu elemente finite; - analiza ru…
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UPON ANALITICAL AND NUMERICAL CALCULUS OF THE MAIN PARAMETERS OF THE DETONATION PROCESS
Vasile NĂSTĂSESCU1,Ghiţă BÂRSAN
This paper presents some results of scientific research undertaken by the authors, regarding the numerical modeling of the detonation process, both the Finite Element Method (FEM) and the method of free particles, in version of Smoothed Particle Hydrodynamics…
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DYNAMICAL BEHAVIOR OF HARDWOOD SPECIES SUBJECTED TO CYCLIC BENDING STRESSES
Mariana Domnica STANCIU, Ioan CURTU, Adriana SAVIN
Hardwood species as beech, maple, cherry, alder are used in common application such furniture, musical instruments, ornaments in automotive construction, panels and floors. The stresses vary in time as intensity, duration and type. From this point of view, so…
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SOME ASPECTS REGARDING STRESS WAVE PROPAGATION IN TRONCONICAL SHORT BARS WITH VARIABLE ANGLE
Nicolae ILIESCU, Vasile NĂSTĂSESCU, Costică ATANASIU
In the first part of the paper an algorithm of calculus, using FEM, developed by the authors in a previous paper, is presented. This computational algorithm was applied in the study of stresses wave propagation produced by an axial impact in a tronconical sho…
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CURRENT RESEARCH DIRECTIONS IN BUILDING PHYSICS IMPROVING PERFORMANCE LEVELS FOR NEW OR RENOVATED BUILDINGS
Adrian RADU, Maricica VASILACHE, Marian PRUTEANU
In the present climatic, social and political conditions, the EU energy independence is emerging as a priority. Therefore, it set new levels of thermal protection minimum required and adapting buildings architecturally to achieve a maximum of energy efficienc…
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INTERNAL RESONANT TRANSFORMER WITH DISTRIBUTED OPEN MAGNETIC CORE
Andrei MARINESCU, Aurelia SCORNEA, Ionel DUMBRAVA
The on-site dielectric tests on cables and high power electric machines requires the achievement of some medium voltage testing facilities with reduced dimensions and weights, allowing the compensation of the important reactive energy required by the own capa…
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THEORETICAL CONSIDERATIONS ON THE MICROMECHANICS COMPOSITE MATERIALS
Constantin D. STǍNESCU, Doina TǍRǍBUŢǍ (ENE),Mariana PǍTRAŞCU (ANTONESCU, Melania TĂMAȘ
the efficiency of a composite material is distinguished by the top level of the technical characteristics and its properties. For their study, it appeals to a number of considerations, such as: minimum dimensions of the primary elements of reinforcement secti…
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THEORETICAL RESEARCH ON THE MODELING OF CHARACTERISTICS OF COMPOSITE MATERIALS
Constantin D. STǍNESCU, Doina TǍRǍBUŢǍ (ENE),Mariana PǍTRAŞCU (ANTONESCU), Melania TĂMAȘ
the two components of the composite material, i.e., the matrix and the wire, take the requests differently compared with their rigidity. The way the force applied is taken over by composite components and their structural deformities depend on the connection …
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CONSIDERATIONS ON CONTACTLESS ELECTROMAGNETIC TECHNIQUES FOR MEASURING SOIL CONDUCTIVITY
Tudor BURLAN-ROTAR, Constantin STANESCU, Melania TAMAS
Conventional determination of resistivity by galvanic method requires a relatively large amount of labor to apply them in practice and is therefore expensive. It is the lateral or vertical variations of resistivity which form the basis of any interpretation. …
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OSCILLATIONS OF LARGE AMPLITUDE OF A RIGID SPHERE IN A VISCOUS FLUID
Sorin BERBENTE, Corneliu BERBENTE
One considers the oscillations of large amplitude of a pendulum made of a rigid sphere suspended by a cylindrical bar articulated in a fixed point. The motion is two-dimensional and takes place in in a viscous fluid of variable density, initial at rest. The s…
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RESULTS REGARDING MONITORING OF THE RISKS IN THE ROMANIA-BULGARIA CROSS-BORDER AREA
Gheorghe MANOLEA, Laurențiu ALBOTEANU, Constantin ȘULEA
In the period 2011-2014 was developed the cross-border project RO-BG MIS ETC 166 ”Joint Risk Monitoring during Emergencies in the Danube Area Border ”.The objectives were:1. Conceiving and realization of photovoltaic system for anti-hail units power supply sy…
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IMPLEMENTING THE TRAM-TRAIN SYSTEM FOR PUBLIC TRANSIT, THE KEY TO AN EFFICIENT MOBILITY IN THE WESTERN DEVELOPMENT REGION AND DKMT EURO-REGION
Radu RADOSLAV, Mihai-Ionuț DANCIU
The world urban population growth brings challenges that concern every one of the three components of the organic growth: economic, social and ecologic (Little D., Arthur, 2014). Their development will induce the necessity to assure extremely effective mobili…
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CERCETAREA SI PROGRESUL TEHNOLOGIC –
FACTORI PRINCIPALI AI DEZVOLTARII
IMM-URILOR
Ing. Marian DUTA
Lucrarea prezinta doua exemple sugestive de proiecte de cercetare din cadrul Programului Operational Sectorial Cresterea Competitivitatii Economice, in care este implicat Institutul National de Cercetare - Dezvoltare si Incercari pentru Electrotehnica – Cra…
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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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Variation of aflatoxin M1 in milk at different doses of ultraviolet radiation
Ketney Otto, Tita Ovidiu, Tita Mihaela Adriana