596 articole găsite pentru „arc”.
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The physical and chemical structures by milk derivates
Florin M. Dumitrescu
Diferite proprietati fizico-chimice si mecanice ale margarinei, ca plasticitatea, vascozitatea, culoarea, gustul, aromele, punctul de topire, sunt similare cu ale untului de vaca natural, pe care il inlocuieste. In aceasta lucrare de cercetare a fost studiata…
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Determinarea grosimii copertei zacamantului de granodiorit Valea Lazului-Pietroasa, judetul Bihor, prin metoda sondajului electric vertical
Dr. ing. Christian Stanciu, Conf. dr. ing. Mihai MARINESCU, Ing. Sanda BUGIU, Asist. cercet. ing. Christian STANCIU
Obiectivele lucrarii de fata sunt reprezentate de elucidarea unei structuri geologice-tehnice complexe (depuneri deluviale de panta si grosimea rocii alterate pe un masiv granodioritic fractura) in vederea evaluarii rezervelor de granodiorit, a stabilirii uno…
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Aplicatii civile cu GPS
Lect. univ. drd. ing. Iustin Andronie, Asist. univ. drd. ing. Mihai Andronie
Reteaua de sateliti GPS si sistemele GPS au devenit un lucru obisnuit in viata de zi cu zi. Aplicatiile sunt dintre cele mai diverse, de la cele din domeniul militar, determinarea limitelor terenurilor, navigatie comerciala, pina la cele pentru uzul persoanel…
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Studiul regimului de conturare al masinilor de stantat cu comanda numerica
EurIng Prof.dr.ing. O. Bologa, Anca Chicea, R.E. Breaz, S.G. Racz, Claudia Girjob, Cristina Biris
Aceasta lucrare prezinta o abordare unitara, prin simulare si cercetarea experimentala, in scopul de a imbunatati precizia de conturare a masinilor de stantat CNC. Un model matematic al fiecarei unitati de alimentare a fost folosit pentru a construi o diagram…
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Utilizarea tehnologiilor avansate actuale pentru realizarea unui instrument informatic integrat privind studiul comportamentului la uzura si al durabilitatii lubrifiantilor
Drd. ing. Irina Radulescu, Conf. dr. ing. Alexandru Valentin Radulescu
Lucrarea isi propune prezentarea instrumentului informatic integrat pentru modelarea si simularea comportarii la uzura si a durabilitatii lubrifiantilor, realizat in cadrul unui proiect CEEX, de catre parteneriatul compus din mai multe unitati de cercetare st…
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Applications and service integration of decision support systems using .net platform
Ilie Tamas, Radu Bucea-manea, Rocsana Tonis
In cadrul acestui articol vom discuta despre suportul oferit de platforma .NET pentru arhitectura orientata pe servicii (SOA). Pentru inceput vom face o scurta introducere a platformei .NET si apoi vom aprofunda caracteristicile si principiile de baza ale SOA…
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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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PREDICTIVE MAINTENANCE APPLIED TO LASTING EQUIPMENT
Velicu ŞTEFAN, Ionel PĂUNESCU, Marius PARASCHIV, Paul Liviu PĂUNESCU
This paper highlights the research conducted for proactive maintenance application by analyzing vibration and temperature monitoring during equipment operation, a method that provides a beneficial way clear, comprehensive and thorough to maintain normal opera…
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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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RESEARCHES ON IMPROVING THE MANUFACTURING ACCURACY OF CNC CUTTING MACHINES
Cristina BIRIŞ, Octavian BOLOGA, Claudia GÎRJOB
This paper presents the experimental researches results carried out to optimize the dynamic behaviour of a NC machine-tool regarding the cutting precision. The aim is to detail the influence of the numerical control equipment setup on the size of the contouri…
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NEW RESEARCH ON COMPOSITE MATERIALS AT THE METAL FORMING RESEARCH CENTRE
Claudia GÎRJOB, Octavian BOLOGA, Gabriel RACZ, Cristina BIRIS
The Metal Forming Research Centre functions as separate research unit within "Lucian Blaga" University of Sibiu, Romania. This is one of the first centres of its kind in Romanian higher education system and emerged under the aegis of the European inter-univer…
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EFFICIENT COMPUTATIONS WITH STRUCTURED MATRIX PENCILS IN AUTOMATIC CONTROL
Vasile SIMA
There is a continuous research effort worldwide to improve the reliability, efficiency, and accuracy of numerical calculations in various domains. One of the most promising research avenue is to exploit the structural properties of the mathematical problems t…
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COMPUTING SYSTEMS MULTI-OBJECTIVE OPTIMIZATION USING DOMAIN-KNOWLEDGE
Lucian N. VINȚAN
The main aim of this short paper is to point out the advanced computing systems’ optimization research developed by The Advanced Computer Architecture and Processing Systems Research Centre (ACAPS) from “Lucian Blaga” University of Sibiu, Romania. Multi-objec…
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CONTROL AND COORDINATION OF ECONOMIC AND INTELLECTUAL ACTIVITIES BY INTEGRATED COMPLEX STRUCTURES
Constantin MARIN
This paper belongs to the category of research for the development and implementation of heterogeneous structures they apply favorable inclusion of the human factor for control and coordination of complex activities from various fields: economic, intellectual…
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MEANS FOR QUALITATIVE AND QUANTITATIVE DESCRIPTION OF THE CARDIO-PULMONARY SYSTEM OPERATION WITHIN IRREVERSIBLE THERMODYNAMICS WITH FINITE SPEED
Stoian PETRESCU, Monica COSTEA, Liliana TIMOFAN, Valeria PETRESCU
Illness and aging are irreversible processes, which inevitably affects us all. The answers to the questions how, why, and how much irreversible are the cardio-respiratory system processes, will allow improved design of artificial hearts and lungs (vital “spar…
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COMPARATIVE SUSTAINABLE ANTIBACTERIAL TECHNOLOGIES FOR TEXTILE APPLICATIONS
Diana COMAN, Narcisa VRÎNCEANU, Simona OANCEA, Ioan NEAGU
The present study is both a review regarding the newest methodologies of application of antibacterial agents on textile supports, natural and chemical, and an antithesis focusing on the comparison between well known antibacterial agents, ranging from syntheti…
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POSSIBLE MEASURES OF TAKING-OVER/ DYNAMIC CONTROL OF SEISMIC ACTIONS APPLICABLE TO URBAN UTILITY SYSTEMS. SEISMIC WAVES DEFLECTION/ DAMPING USING METAMATERIALS
Bogdan UNGUREANU, Gabriela M. ATANASIU, Victoria COTOROBAI
Nowadays, an accurate seismic prediction regarding the date, location and magnitude is still a challenge, thing that implies taking into consideration efficient, preventive, seismic risk management measures, not only for civil buildings but also for urban uti…
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HIGH PERFORMANCE MAGNETIC DEVICES BASED ON NANOCRYSTALLINE MATERIALS
Andrei MARINESCU Horia GAVRILA, Ionel DUMBRAVA
During the last two decades remarkable advances occurred in the field of semiconductor devices and smart systems, by their miniaturization and performance increase. Consequently, the reduction of equipment energy consumption and dimensions has resulted. A maj…
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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 …